An integrated process for removing sulfate from water sources, such as pretreated acid mine drainage (AMD). The multivalent cation (MVC) content of a sulfate stream is reduced by strong acid cation (SAC) ion exchange and sulfate is concentrated with a membrane system and separated as precipitate...
Sulfate is removed as part of the ettringite or ettringite-like materials, but calcium content can be reduced at the same time even though calcium chloride is used as an additive to the treated water. Lime may be used also as a supplemental source of calcium and to help raise the pH. ...
Sulfate can be replaced with chloride ion by anion exchange in a method analogous to water softening. A strong-base resin is used, and regeneration is with sodium chloride. Sulfate levels are reduced to below 1 ppm. Sulfate-chloride exchange is an interesting case in that both loading and ...
Sulfate removalDesign of experimentsMining watersElectrocoagulationWastewater treatmentThe mining industry is known to be a major producer of sulfate-rich waters that are harmful to aquatic systems, accelerate acid mine drainage formation and hinder the reuse and recycling of process water. In recent ...
It was also discovered that the Brae reservoirs contained between 800 and 2,500 rag/1 barium in the formation water. By injecting seawater containing approximately 2,700 mg/1 sulfate into these reservoirs, severe scaling potential was anticipated due to the reaction of the sulfate in the ...
Response surface methodology for optimization of simultaneous Cr (VI) and as (V) removal from contaminated water by nanofiltration process Nanofiltration (NF)Reverse osmosis (RO)One of the factors that determine agricultural crops' yield is the quality of water used during irrigation. In this... ...
Mine process waterSulfate removalSulfate reducing bacteriaA low pH sulfidogenic bioreactor, maintained at between pH 2.8 and pH 4.5, was used to remove sulfate from two extremely acidic (pH 1.3 to 3.0) synthetic mine waters that contained small amounts of ferrous iron, but no other ...
Mine Water and the Environment (2023) 42:200–208 https://doi.org/10.1007/s10230-023-00923-9 TECHNICAL COMMUNICATION Removal of Sulfate and Metals from Wastewater of a Mining Enterprise by a Dual Sorbent System: A Case Study Eugenia Krasavtseva1,3 · Harshita...
We studied the effects of various parameters on the removal of Cr(VI) from polluted water and drinking water such as pH, pressure, concentrations of chromium, concentrations of sulfate, and total dissolved solids (TDS). The selected parameters were as follows: pressure: 0.1-0.4 MPa, pH: ...
Humic acid (HA) removal from water with inorganic polyaluminum coagulants is reported in this paper. Polyaluminum chloride (PAC) and three kinds of polyalu... Z Wu,P Zhang,G Zeng,... - 《Journal of Environmental Engineering》 被引量: 21发表: 2012年 Mechanisms of sulfate removal from sub...