Hindawi Journal of Chemistry Volume 2018, Article ID 2721752, 10 pages https://doi.org/10.1155/2018/2721752 Research Article Impact Assessment of Phosphogypsum Leachate on Groundwater of Sfax-Agareb (Southeast of Tunisia): Using Geochemical and Isotopic Investigation Samira Melki and Moncef Gueddari Laboratory of Geochemistry and Environmental Geology, Department of Geology, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia Correspondence should be addressed to Samira Melki;
[email protected] Received 12 November 2017; Accepted 8 January 2018; Published 31 January 2018 Academic Editor: Adina Negrea Copyright © 2018 Samira Melki and Moncef Gueddari. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Te production of phosphoric acid by the Tunisian Chemical Group, in Sfax, Tunisia, led to the degradation of the groundwater quality of the Sfax-Agareb aquifer mainly by the phosphogypsum leachates infltration. Spatiotemporal monitoring of the quality of groundwater was carried out by performing bimonthly sampling between October 2013 and October 2014. Samples culled in the current study were subject to physicochemical parameters measurements and analysis of the major elements, orthophosphates, 18 2 fuorine, trace metals, and stable isotopes ( O, H). Te obtained results show that the phosphogypsum leachates infltration has 2− − a major efect on the downstream part of the aquifer, where the highest values of conductivity, SO4 ,Ortho-P,andF ,andthe lowest pH were recorded. In addition, these results indicated that phosphogypsum leachates contained much higher amount of Cr, Cd, Zn, Cu, Fe, and Al compared to the groundwater.