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Barium Sulfate Scale Prevention

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Barium Sulfate Scale Prevention Tech Manual Excerpt Water Chemistry and Pretreatment Barium Sulfate Scale Prevention Barium Sulfate Barium sulfate is the most insoluble of all alkaline-earth sulfates. When present in Scale Prevention water, it may lead to massive precipitation, possibly acting as a catalyst for calcium sulfate and strontium sulfate scaling. In most natural waters, barium is present at a level that would cause barium sulfate precipitation in the concentrate stream. The critical feed concentration of barium may be as low as < 15 µg/L in seawaters, < 5 µg/L in brackish waters or even < 2 µg/L if sulfuric acid is dosed to brackish waters. Calculation /8/ Prediction of BaSO4 scaling potential is performed in the same way as the previously described procedure for CaSO4. 1. Calculate the ionic strength of the concentrate stream (Ic) following the procedure described in Scaling Calculations (Form No. 45-D01551-en): Eq. 1 2. Calculate the ion product (IPc) for BaSO4 in the concentrate stream: Eq. 2 where: m 2+ 2+ ( Ba )f = M Ba in feed, mol/L m 2– 2– ( SO4 )f = M SO4 in feed, mol/L 3. Compare IPc for BaSO4 with the solubility product (Ksp) of BaSO4 at the ionic ≥ strength of the concentrate stream, Figure 1. If IPc Ksp, BaSO4 scaling can occur, and adjustment is required. Adjustments for BaSO4 Scale Control The adjustments discussed in Calcium Sulfate Scale Prevention (Form No. 45-D01553-en) for CaSO4 scale control apply as well for BaSO4 scale control. Page 1 of 2 Form No. 45-D01554-en, Rev. 4 April 2020 Excerpt from FilmTec™ Reverse Osmosis Membranes Technical Manual (Form No. 45-D01504-en), Chapter 2, "Water Chemistry and Pretreatment." Have a question? Contact us at: All information set forth herein is for informational purposes only. This information is general information and may differ from that based on actual conditions. Customer is responsible for determining whether products and the information in this document are www.dupont.com/water/contact-us appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where DuPont is represented. The claims made may not have been approved for use in all countries. Please note that physical properties may vary depending on certain conditions and while operating conditions stated in this document are intended to lengthen product lifespan and/or improve product performance, it will ultimately depend on actual circumstances and is in no event a guarantee of achieving any specific results. DuPont assumes no obligation or liability for the information in this document. References to “DuPont” or the “Company” mean the DuPont legal entity selling the products to Customer unless otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. No freedom from infringement of any patent or trademark owned by DuPont or others is to be inferred. DuPont™, the DuPont Oval Logo, and all trademarks and service marks denoted with ™, ℠ or ® are owned by affiliates of DuPont de Nemours Inc. unless otherwise noted. © 2020 DuPont. Page 2 of 2 Form No. 45-D01554-en, Rev. 4 April 2020.
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