DOCSLIB.ORG

Effects of Feedds and EDDS on Peat-Based Substrate Ph and Cu

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Effects of Feedds and EDDS on Peat-Based Substrate Ph and Cu HORTSCIENCE 47(2):269–274. 2012. was reported by Albano (2011) and Albano and Merhaut (2012) where it was found that plants supplied with FeEDDS were not differ- Effects of FeEDDS and EDDS on ent in growth or foliar Fe concentration than plants supplied with FeEDTA, FeDTPA, Peat-based Substrate pH and Cu, Fe, FeEDDHA, or FeSO4. Leachate solution spec- tral properties and chemistry differed, how- Mn, and Zn Solubility ever, between these Fe chelates. It was found that FeEDDS maximally absorbed at a shorter Joseph P. Albano1 wavelength (238 nm) than either FeEDTA USDA-ARS-U.S. Horticultural Research Laboratory, 2001 South Rock Road, (258 nm) or FeDTPA (260 nm) and that Fe- Fort Pierce, FL 34945-3030 catalyzed photodegradation of FeEDDS oc- curred at a rate close to twice that of FeEDTA Additional index words. chelate, complexone, ligand, water quality, bedding plants, fertilizer, when exposed to light (Albano, 2011). It was aminopolycarboxylic acid, media also found that FeEDDS leached less Fe and Mn than FeEDTA, FeDTPA, or FeEDDHA Abstract. Common chelating agents used in horticultural fertilizers like ethylenediamine- during the production cycle of marigold tetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and ethylenediami- (Albano and Merhaut, 2012). Therefore, the nedi(o-hydroxyphenylacetic) acid (EDDHA) are not readily biodegradable and may persist broad objectives of this study were to gain in the environment, maintaining the capacity to solubilize heavy metals. For this reason, knowledge on FeEDDS and EDDS interac- biodegradable chelating agents like ethylenediaminedisuccinic acid (EDDS) are being tions with peat-based substrate. Specific objec- evaluated for use in horticultural crop production. Therefore, the objectives of the study tives were to 1) compare effects of Fe source were to determine the effects of FeEDDS and EDDS on substrate pH and copper (Cu), iron (FeEDDS, FeEDTA, FeDTPA, FeEDDHA, (Fe), manganese (Mn), and zinc (Zn) solubility in peat-based substrate compared with and FeSO4); and 2) compare effects of chelate- various Fe and chelate-ligand sources. Extractions were performed using the 1:2 by volume ligand (EDDS, EDTA, and DTPA) on peat- substrate analysis method with an incubation period of 24 hours. The control was distilled based substrate pH and solubility of Cu, Fe, –1 deionized water extractions. Iron-source (FS) extractants consisted of 1 mgÁL Fe solutions Mn, and Zn. derived from FeEDDS, FeEDTA, FeDTPA, FeEDDHA, and FeSO4. Iron-source extractant solution pH ranged from 7.1 (FeEDDS) to 5.4 (FeSO ). The extract pH for all Fe-source 4 Materials and Methods treatments was similar at pH 6.7, demonstrating the buffering capacity of the peat-based substrate. Iron recovery rates for FS treatments were determined after subtracting Fe that Extractions. Substrate analysis was per- was freely extracted with distilled-deionized water: FeSO4 (13%), FeEDDHA (68%), formed using the 1:2 by volume extraction FeEDDS (73%), FeEDTA (102%), and FeDTPA (121%). Iron-source treatments were not method (Sonneveld and van den Ende, 1971; –1 –1 –1 different for Mn, averaging 0.03 mgÁL , and Cu (0.04 mgÁL ) and Zn (0.24 mgÁL )were Sonneveld et al., 1990). In 250-mL LDPE greatest in the FeEDDS treatment. Chelate-ligand (CL) extractants consisted of 5 mM bottles, 100 cm3 of peat-based substrate (Fafard solutions of EDDS, EDTA, and DTPA. Chelate-ligand extractant solution pH ranged from 4P; Conrad Fafard, Inc., Agawam, MA) com- 9.7 (EDDS) to 2.3 (DTPA), and extract solution pH ranged from 7.2 (EDDS) to 4.7 (DTPA). posed of Canadian sphagnum peatmoss (45%), Extractant solutions of EDDS and DTPA resulted in the lowest and highest levels of Cu processed pine bark, perlite, vermiculite, dolo- –1 –1 (0.06 and 0.14 mgÁL , respectively) and Fe (4.3 and 13.1 mgÁL , respectively) in extract mite, wetting agent, and a preplant fertilizer solutions. Overall, these results suggest that there are no negative implications for the use (i.e., nutrient starter charge) (<http://www. of FeEDDS with peat-based substrate in terms of horticultural crop production based on fafard.com/Products/MiddleWeightMixes.aspx> substrate Fe solubility, which was not different from FeEDTA. accessed 15 Nov. 2011) (moisture content was 45% ± 1%, n = 6) was combined with 200 mL extractant solution. Bottles were capped and Soluble fertilizers are typically formulated synthetically produced and not readily bio- placed on a flatbed shaker set at 160 rpm for a with metal-aminopolycarboxylic acids [APCA degradable (Borowiec et al., 2007; Sillanpa¨a¨, 24-h incubation period. Extract solutions were (i.e., chelating agents)] of Cu, Fe, Mn, and Zn. 1997). In Europe, these chelating agents, gravity filtered (Whatman 541; Whatman, Int., These metal–APCA complexes, however, are especially EDTA, are persistent in the envi- Kent, U.K.) with filtrates analyzed for pH using also applied as single-metal chelate solutions ronment and are believed to have the ability a glass electrode, temperature-compensated to foliage, soil/substrate, or both for correcting to extract and mobilize heavy metals from pH meter (AR50 pH meter; Fisher Scientific, micronutrient deficiency like Fe chlorosis sediments in surface and groundwaters; trans- Suwannee, GA), and subsequently analyzed for (Mortvedt, 1991). Common chelating agents porting extracted metals in the water column Cu, Fe, Mn, and Zn by inductively coupled used in fertilizers include EDTA, DTPA, and (complete review in Albano, 2011). For these plasma–optical emission spectroscopy (iCAP EDDHA (Lucena, 2003). These chelating reasons, in Europe, EDTA is being replaced 6500; ThermoScientific, West Palm Beach, agents differ in stability/formation constants, where possible with biodegradable chelating FL) according to U.S. EPA Method 6010B i.e., the chemical bond-strength of the ion- agents like [S, S#]-EDDS (EDDS), which is (1997) with quality assurance as described by ligand complex with metals as a function of a structural isomer of EDTA that is reported Hoskins and Wolf (1998). The extractants for pH, but they share a common trait; they are to have similar functionality as a chelate Expt. 1 were 1 mgÁL–1 Fe solutions derived (Metsa¨rinne et al., 2001; Neal and Rose, from FeEDDS, FeEDTA, FeDTPA, FeEDDHA, 1973). However, several other readily bio- or FeSO4 (FS). The extractants for Expt. Received for publication 21 Sept. 2011. Accepted degradable ‘‘green’’ chelating agents are also 2were5mM solutions of EDDS, EDTA, or for publication 25 Dec. 2011. being considered as replacements including DTPA (CL). Extractants in Expts. 1 and 2 were This work is associated with USDA-ARS Research methylglycinediacetic acid, L-aspartic acid not buffered, and the control in both ex- Project 6618-13000-003-00D and was partially N, N-diacetic acid, sodium diethanolglycine/ periments was distilled-deionized (DI) water supported by the USDA-ARS Floriculture and 2-hydroxyliminodiacetic acid, iminodisuc- extractant. Chemical reagent sources were: Nursery Research Initiative. cinic acid with salts, glutamic acid diacetic [S, S#]-EDDS trisodium salt (Fluka Analytical, I thank Chris Lasser, Loretta Myers, and Marcus Martinez for technical assistance and Randy Niedz acid, and N-(1,2-dicarboxyethyl)-D,L-aspartic Steinheim, Germany), EDTA disodium salt and Kim Bowman for organizational reviews of the acid (Glauser et al., 2010; Lucena et al., 2008). dihydrate (Sigma-Aldrich, Inc., St. Louis, MO), manuscript. Little is known about the use of EDDS in DTPA (Sigma-Aldrich), FeEDDS (prepared as 1To whom reprint requests should be addressed; horticultural crop production. Its use as an Fe- described in Albano, 2011), FeEDTA sodium e-mail [email protected]. chelating agent in the production of marigold salt hydrate (Sigma-Aldrich), FeDTPA disodium HORTSCIENCE VOL. 47(2) FEBRUARY 2012 269 salt hydrate (Sigma-Aldrich), FeEDDHA (Se- questrene 138; Becker Underwood, Inc., Ames, IA), and Fe(II)SO4 heptahydrate (Fisher Scien- tific, Fair Lawn, NJ). Ultraviolet/Visible absorbance of iron source and chelate-ligand extract solutions. All absorption spectra were determined using a scanning ultraviolet/visible spectrophotom- eter (Beckman DU 800; Beckman Coulter, Inc., Brea, CA). Spectra of extracts for Expt. 1 (FS) and Expt. 2 (CL) were determined by scanning from 200 to 500 nm and 200 to 400 nm, respectively, at 1-nm intervals at 1200 nm per minute. Extract solutions for analysis by spectrophotometer received an additional filtration (initial filtration was Whatman 541) through a syringe filter disc (Puradisc 25TF, PTFE, 1.0-mm pore size; Whatman) before scans. In Expt. 1, extract solutions were blanked against the DI water control extract, and in experiment 2, extract solutions were blanked against the DI water control extract with the CL extractant solution absorbance subtracted to yield spectra specifically asso- ciated with Fe-chelates. Statistics. Extractions were run in tripli- cate. Data were analyzed by one-way analysis of variance to determine the main effects of FS or CL on the dependent variables pH, Cu, Fe, Fig. 1. Extraction (•) and extract (°) solution pH for Expt. 1 [iron-source (FS)]. Vertical bars represent SEM. Mn,andZn.Calculationswereperformedby When not present, bars fall within the symbol. n = 3. the general linear model procedure of SAS (Version 9.2; SAS Institute, Cary, NC). Means were separated and planned comparisons were made using Tukey when P # 0.05. Results Expt. 1: Iron-source interaction. Effects of FS were significant for pH, Cu, Fe, and Zn at P # 0.001 and not significant for Mn. Extrac- tant solutions were unbuffered and ranged in pH from 7.1 (FeEDDS) to 5.4 (FeSO4) (Fig. 1). The pH of extract solutions as a mean of all treatments including the DI water control after 24-h incubation was similar at 6.7 ± 0.1 demonstrating the buffering capacity of the substrate (Fig. 1). This mean pH (6.7) is at the upper limits of what is broadly considered suitable for the production of bedding plants in peat-based soilless substrate (pH 5.4–6.8; Nelson, 1999) and is consistent with the initial substrate pH for the same brand substrate used in the study as reported by others (Dekkers et al., 2000).
Load more

Recommended publications
  • Effect of EDTA, EDDS, NTA and Citric Acid on Electrokinetic Remediation of As, Cd, Cr, Cu, Ni, Pb and Zn Contam- Inated Dredged Marine Sediment
    Effect of EDTA, EDDS, NTA and citric acidon electrokinetic remediation of As, Cd, Cr, Cu, Ni, Pb and Zn contaminated dredged marine sediment Yue Song, Mohamed-Tahar Ammami, Ahmed Benamar, S. Mezazigh, Huaqing Wang To cite this version: Yue Song, Mohamed-Tahar Ammami, Ahmed Benamar, S. Mezazigh, Huaqing Wang. Effect of EDTA, EDDS, NTA and citric acid on electrokinetic remediation of As, Cd, Cr, Cu, Ni, Pb and Zn contam- inated dredged marine sediment. Environmental Science and Pollution Research, Springer Verlag, 2016, 23 (11), pp.10577-10586. 10.1007/s11356-015-5966-5. hal-01537604 HAL Id: hal-01537604 https://hal.archives-ouvertes.fr/hal-01537604 Submitted on 12 Jun 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Environ Sci Pollut Res (2016) 23:10577–10586 DOI 10.1007/s11356-015-5966-5 RECENT SEDIMENTS: ENVIRONMENTAL CHEMISTRY, ECOTOXICOLOGY AND ENGINEERING Effect of EDTA, EDDS, NTA and citric acid on electrokinetic remediation of As, Cd, Cr, Cu, Ni, Pb and Zn contaminated dredged marine sediment Yue Song 1,2 & Mohamed-Tahar Ammami 1 & Ahmed Benamar1 & Salim Mezazigh2 & Huaqing Wang1 Received: 3 July 2015 /Accepted: 10 December 2015 /Published online: 19 January 2016 # Springer-Verlag Berlin Heidelberg 2016 Abstract In recent years, electrokinetic (EK) remediation (30.5∼31.3 %).
    [Show full text]
  • Studies on Metal Complex Formation of Environmentally Friendly Aminopolycarboxylate Chelating Agents
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Helsingin yliopiston digitaalinen arkisto Studies on metal complex formation of environmentally friendly aminopolycarboxylate chelating agents Helena Hyvönen Laboratory of Inorganic Chemistry Department of Chemistry Faculty of Science University of Helsinki Finland Academic dissertation To be presented with the permission of the Faculty of Science of the University of Helsinki for public criticism in Auditorium A110 of the Department of Chemistry, A.I. Virtasen aukio 1, on June 25th 2008 at 12 o’clock noon Helsinki 2008 Supervisor Professor Heikki Saarinen Department of Chemistry University of Helsinki Finland Reviewers Professor Konstantin Popov Physical and Colloid Chemistry Department Moscow State University of Food Production Russia Professor Mika Sillanpää Department of Environmental Sciences University of Kuopio Finland Opponent Professor Lauri Lajunen Department of Chemistry University of Oulu Finland © Helena Hyvönen ISBN 978-952-92-4005-0 (paperback) ISBN 978-952-10-4741-1 (PDF) http://ethesis.helsinki.fi Yliopistopaino Helsinki 2008 2 Abstract For decades, ethylenediaminetetraacetic acid (EDTA) and other aminopolycarboxylates with similar complexation properties and applicability have been widely used as chelating agents in various branches of industry. Recently, the low biodegradability of these ligands and their accumulation in the environment has become cause for concern, because of the persistence of these ligands and their metal complexes in nature. Ethylenediaminedisuccinic acid (EDDS), iminodisuccinic acid (ISA), N-bis[2-(1,2- dicarboxyethoxy)ethyl]aspartic acid (BCA6), N-bis[2-(1,2-dicarboxyethoxy)ethyl]- glycine (BCA5), N-bis[2-(1,2-dicarboxyethoxy)ethyl]methylglycine (MBCA5) and N- tris[(1,2-dicarboxy-ethoxy)ethyl]amine (TCA6) are more environmentally benign and potential candidates to replace EDTA, and also diethylenetriaminepentaacetic acid (DTPA), in several applications.
    [Show full text]
  • Technical Advisory Panel Report (PDF)
    (S, S)-Ethylenediaminedisuccinic Acid (free acid) Crop Production 1 2 Identification of Petitioned Substance 3 Chemical Name: 16 Trade Names: 4 Ethylenediamine-N,N'-disuccinic acid 17 5 6 IUPAC name: CAS Number : 7 2-[2-(1,2-dicarboxyethylamino)ethylamino] 20846-91-7 8 butanedioic acid. 18 9 19 10 Other Names: Other Codes: 11 EDDS, EDSS, Ethylenediamine-N,N’-disuccinic acid, 20 12 N,N'-ethylenedi-L-aspartic acid, N,N'-Ethylenedi-L- 21 13 aspartic acid, N,N'-Ethylenediamine disuccinic acid, 22 14 N,N'-Ethylenediaspartic acid 23 15 24 25 26 Characterization of Petitioned Substance 27 28 Note: Chelation is a process in which free metal ions combine with ligands (chelators, chelating agents) to form metal 29 complexes. With respect to free metal ions, metal ions in complexes are less reactive, less subject to precipitation 30 processes, and remain water-soluble for a longer time. Nutrient metals stay water-soluble for a longer time so that 31 plants/animals assimilate more. Toxic metals also stay water-soluble for a longer period of time and cause more 32 damage such as suppressing plant growth. Previously precipitated/adsorbed metal ions form complexes with available 33 chelating agents, are released back to water-soluble, and cause different effects (such as being transported to 34 underground water or to different geographical locations). Some basic concepts and issues related to chelation such as 35 complex stability, ligand stability, reversible processes, competition processes, etc, are presented in Appendix A: 36 Chelation and related issues. 37 38 Composition of the Substance: 39 40 Ethylenediamine-N,N’-disuccinic acid (EDDS) is one of the aminopolycarboxylic acids (APCAs).
    [Show full text]
  • “Inert” Ingredients Used in Organic Production
    “Inert” Ingredients Used in Organic Production Terry Shistar, PhD A Beyond Pesticides Report he relatively few registered pesticides allowed in organic production are contained in product formulations with so-called “inert” ingredients that are not disclosed on the T product label. The “inerts” make up the powder, liquid, granule, or spreader/sticking agents in pesticide formulations. The “inerts” are typically included in products with natural or synthetic active pesticide ingredients recommended by the National Organic Standards Board (NOSB) and listed by the National Organic Program (NOP) on the National List of Allowed and Prohibited Substances. Any of the pesticides that meet the standards of public health and environmental protection and organic compatibility in the Organic Foods Production Act (OFPA) may contain “inert” ingredients. Because the standards of OFPA are different from those used by the U.S. Environmental Protection Agency (EPA) to regulate pesticides and given changes in how the agency categorizes inerts, the NOSB has adopted a series of recommendations since 2010 that established a substance review process as part of the sunset review. NOP has not followed through on the Board’s recommendations and, as a result, there are numerous materials in use that have not been subject to OFPA criteria. This report (i) traces the history of the legal requirements for review by the NOSB, (ii) identifies the universe of toxic and nontoxic materials that make of the category of “inerts” used in products permitted in organic production, and (iii) suggests a path forward to ensure NOSB compliance with OFPA and uphold the integrity of the USDA organic label.
    [Show full text]
  • Surface Water Photochemistry
    AperTO - Archivio Istituzionale Open Access dell'Università di Torino Surface Water Photochemistry This is the author's manuscript Original Citation: Availability: This version is available http://hdl.handle.net/2318/1622297 since 2017-01-18T17:16:36Z Publisher: Royal Society of Chemistry Terms of use: Open Access Anyone can freely access the full text of works made available as "Open Access". Works made available under a Creative Commons license can be used according to the terms and conditions of said license. Use of all other works requires consent of the right holder (author or publisher) if not exempted from copyright protection by the applicable law. (Article begins on next page) 08 October 2021 This is the author's final version of the contribution published as: Paola Calza; Davide Vione. Surface Water Photochemistry. Royal Society of Chemistry. 2016. pp: 1-297. When citing, please refer to the published version. Link to this full text: http://hdl.handle.net/2318/1622297 This full text was downloaded from iris - AperTO: https://iris.unito.it/ iris - AperTO University of Turin’s Institutional Research Information System and Open Access Institutional Repository Surface Water Photochemistry Chapter 1 Introduction Davide Vione* and Paola Calza Department of Chemistry University of Torino Via P. Giuria 5 10125 Torino Italy [email protected] 1. Introduction In the following sections of this introductory chapter, some basic pieces of information are provided that will be useful for the understanding of the chapters that follow. 1.1. Basic principles of photophysics and environmental photochemistry 1,2 In the natural environment sunlight is the source of radiation ( λ > 280 nm) and, for photochemistry to be operational, one needs molecules that absorb radiation above 280 nm.
    [Show full text]
  • Download This Article PDF Format
    Organic & Biomolecular Chemistry View Article Online COMMUNICATION View Journal | View Issue Biocatalytic enantioselective hydroaminations enabling synthesis of N-arylalkyl-substituted Cite this: Org. Biomol. Chem., 2021, 19, 6407 L-aspartic acids† Received 18th April 2021, Accepted 30th June 2021 Mohammad Z. Abidin, a,b Thangavelu Saravanan, *a,c Laura Bothof, a DOI: 10.1039/d1ob00748c Pieter G. Tepper,a Andy-Mark W. H. Thunnissen d and Gerrit J. Poelarends *a rsc.li/obc N-Substituted L-aspartic acids are important chiral building blocks selective biocatalytic hydroamination approach would be an for pharmaceuticals and food additives. Here we report the asym- interesting option. metric synthesis of various N-arylalkyl-substituted L-aspartic acids Two well-studied carbon–nitrogen (C–N) lyases, aspartate – using ethylenediamine-N,N’-disuccinic acid lyase (EDDS lyase) as a ammonia lyase (DAL)10 12 and 3-methylaspartate ammonia biocatalyst. This C–N lyase shows a broad non–natural amine sub- lyase (MAL),10,11,13 have been employed as biocatalysts in the strate scope and outstanding enantioselectivity, allowing the enantioselective hydroamination of fumaric acid to afford Creative Commons Attribution-NonCommercial 3.0 Unported Licence. efficient addition of structurally diverse arylalkylamines to fuma- N-substituted L-aspartic acids. In addition, we started to inves- rate to afford the corresponding N-arylalkyl-substituted L-aspartic tigate another interesting C–N lyase, ethylenediamine-N,N′-di- acids in good isolated yield (up to 79%) and with excellent enantio- succinic acid (EDDS) lyase from Chelativorans sp. BNC1, which purity (>99% ee). These results further demonstrate that C–N utilizes a characteristic serine residue (Ser-280) as the catalytic lyases working in reverse constitute an extremely powerful syn- base to facilitate the deamination of (S,S)-EDDS to give ethylene- thetic tool to prepare difficult noncanonical amino acids.
    [Show full text]
  • RMOA DTPA V2 Public
    RMOA DTPA salts. _________________________________________________________________ ANALYSIS OF THE MOST APPROPRIATE RISK MANAGEMENT OPTION(S) FOR “DTPA” SALTS Submitted by: ANSES (FRANCE) Date: December 2014 EC No 205-391-3 & 200-652-8 MSCA - France RMOA DTPA salts. _____ ____________________________________________________________ CONTENT 1 BACKGROUND ....................................................................................................... 3 1.1 General context 3 2 IDENTITY OF THE SUBSTANCES .............................................................................. 4 2.1 Main identifiers of the substance 4 2.2 Similar substances/grouping possibilities 6 2.3 Regulatory context 7 3 HAZARD INFORMATION .......................................................................................... 10 3.1 Key hazard information 10 3.1.1 Health hazards related to DTPA 10 3.1.2 DNELs derivation 15 3.2 E-fate and ecotoxicity 15 3.3 Classification and labelling 17 3.3.1 Harmonised Classification in Annex VI of the CLP 17 3.3.2 Self classification 17 3.4 PBT Assessment 17 4 INFORMATION ON USES ......................................................................................... 19 4.1 Registration status 19 4.2 Overview of uses 19 4.3 Exposure information 20 4.4 Risks presented for human health 21 4.5 Risks for the Environment 21 5 ALTERNATIVES ...................................................................................................... 22 6 JUSTIFICATION FOR THE RISK MANAGEMENT OPTION ..............................................
    [Show full text]
  • 232524692.Pdf
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by University of Groningen University of Groningen Biocatalytic Enantioselective Hydroaminations for Production of N-Cycloalkyl-Substituted L- Aspartic Acids Using Two C-N Lyases Zhang, Jielin; Fu, Haigen; Tepper, Pieter; Poelarends, Gerrit Published in: Advanced Synthesis & Catalysis DOI: 10.1002/adsc.201801569 IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2019 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Zhang, J., Fu, H., Tepper, P., & Poelarends, G. (2019). Biocatalytic Enantioselective Hydroaminations for Production of N-Cycloalkyl-Substituted L-Aspartic Acids Using Two C-N Lyases. Advanced Synthesis & Catalysis, 361(11), 2433-2437. https://doi.org/10.1002/adsc.201801569 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum.
    [Show full text]
  • EU Risk Assessment Report, August 14, 2000
    2 COONa CH ) 2 A N N CH EINECS No: 200-573-9 2 odium 315 E EDT 4 CH COONa EUR 21 2 (Na tetras COONa CH 2 CH N 2 ethylenediaminetetraacetate CAS No: 64-02-8 CH COONa European Union Risk Assessment Report Protection 51 : Substances Priority List st European Institute for Health and Consumer 1 Bureau Chemicals Existing Volume European Chemicals Bureau European Union Risk Assessment Report CAS: 64-02-8 asodium ethylenediaminetetraacetate (Na EDTA) EC: 200-573-9 tetr 4 51 PL-1 European Union Risk Assessment Report TETRASODIUM ETHYLENEDIAMINETETRAACETATE (NA4EDTA) CAS No: 64-02-8 EINECSNo: 200-573-9 RISK ASSESSMENT LEGAL NOTICE Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use which might be made of the following information A great deal of additional information on the European Union is available on the Internet. It can be accessed through the Europa Server (http://europa.eu.int). Cataloguing data can be found at the end of this publication Luxembourg: Office for Official Publications of the European Communities, 2004 © European Communities, 2004 Reproduction is authorised provided the source is acknowledged. Printed in Italy TETRASODIUM ETHYLENEDIAMINETETRAACETATE (NA4EDTA) CAS No: 64-02-8 EINECS No: 200-573-9 RISK ASSESSMENT Final Report, 2004 Germany The risk assessment of tetrasodium ethylenediaminetetraacetate (Na4EDTA) has been prepared by Germany on behalf of the European Union. Contact point: Bundesanstalt für Arbeitsschutz und Arbeitsmedizin (BAuA) Anmeldestelle Chemikaliengesetz
    [Show full text]
  • Master S Thesis K10K 9 F19
    Catalyzed Calcium Peroxide as Treatment Technology for Organic Compound Contaminated Soil and Groundwater Master’s Thesis in Chemical Engineering Barend de Jong Section of Chemical Engineering Department of Chemistry and Bioscience Aalborg University, Esbjerg Denmark 07-06-2019 Preface The present writing is a master’s thesis named ’catalyzed calcium peroxide as treatment technology for organic contaminated soil and groundwater’ made by Barend de Jong. This work serves the final work for the Master of Science (M.Sc.) degree in Chemical Engineering at Aalborg University Esbjerg. This work was written in the period from the 1st of October 2018 till the 7th of June 2019, under supervision of Jens Muff. This thesis concerns technology development of calcium peroxide based in-situ chemical oxidation. The potential of this technology has been demonstrated in previous research, but requires more research, development and optimization. Laboratory studies are carried out in order to optimize a variety of operating parameters of aqueous and soil systems. Contaminants used in this work are benzoic acid and perchloroethene. Column studies were performed in order to determine the behaviour of this oxidant in subsurface environments. All experimental work was carried out at Aalborg University in Esbjerg. Soil samples and groundwater samples were provided by Rambøll during an excursion to the Kærgård plantation. 1 Chemical Engineering Aalborg University http://www.aau.dk Title: Abstract: Catalyzed Calcium Peroxide as Treatment In this work, calcium peroxide has been Technology for Organic Compound used as a source of hydrogen peroxide for Contaminated Soil and Groundwater the development of the calcium peroxide advanced oxidation process.
    [Show full text]
  • Greener Chelators for Recovery of Metals and Other Applications
    Organic and Medicinal Chemistry International Journal ISSN 2474-7610 Review Article Organic & Medicinal Chem IJ Volume 6 Issue 4 - May 2018 Copyright © All rights are reserved by Kaana Asemave DOI: 10.19080/OMCIJ.2018.06.555694 Greener Chelators for Recovery of Metals and Other Applications Kaana Asemave* Department of Chemistry, Benue State University Makurdi, Nigeria Submission: May 01, 2018; Published: May 15, 2018 *Corresponding author: Kaana Asemave, Department of Chemistry, Benue State University Makurdi, Nigeria, Tel: +234 (0) 8154449231; Email: Abstract Classical chelating agents (especially aminopolycarboxylates, APCs and phosphonates) are till date the commonly used in industrial and home processes. This is due to their ability to strongly bind metals, and perhaps their being available in the market over a long time now. Abundant evidences proved that they are not environmentally benign. This has spurred the quest of industrialists and academia, as prompted rise in formulations and proposals of Greener alternative chelators such as glutamic diacetic acid (L-GLDA), ethylenediamine disuccinic acid [S, by environmental policies, towards low toxicological profile and environmentally friendly chelating agents. The desire has resulted into annual chelantsS]- EDDS, are polyaspartic better employed acid, citrate, for industrial gluconic uses acid, (such amino as acids, metals lipophilic extraction β-diketone and recovery (14,16)-hentriacontanedione, etc.) and home applications. plant extracts etc. to be used in place of the classical chelating agents. For reasons of environmental compatibility, low toxic profile and sustainability, these Greener alternative Keywords: Greener Chelators; Metals Recovery; Stability Constant Introduction generate large amounts of mercury, lead, cadmium, silver, Metals are extensively used by industries in various copper, and zinc ions [8,9].
    [Show full text]
  • Chapter 1 General Introduction
    A Thesis Submitted for the Degree of PhD at the University of Warwick Permanent WRAP URL: http://wrap.warwick.ac.uk/89711 Copyright and reuse: This thesis is made available online and is protected by original copyright. Please scroll down to view the document itself. Please refer to the repository record for this item for information to help you to cite it. Our policy information is available from the repository home page. For more information, please contact the WRAP Team at: [email protected] warwick.ac.uk/lib-publications Zinc on the Move: Insights Towards Understanding Zinc Homeostasis in the Open Ocean Cyanobacterium Synechococcus sp. WH8102 By Amira Zahir Ksibe A thesis submitted for the fulfilment of the degree of Doctor of Philosophy in Chemistry Department of Chemistry and School of Life Sciences February 2017 Table of Contents Table of Contents ....................................................................................................................... i List of Figures ........................................................................................................................ viii List of Tables .......................................................................................................................... xiii Acknowledgments .................................................................................................................. xiv Declaration .............................................................................................................................. xv Dedications
    [Show full text]