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- W3032591566 abstract "Treatment and cleaning of reverse osmosis (RO) membranes saturated with CaCO 3 /brine is a main issue in RO desalination processes. Herein, a Cu–ZnO-polyvinyl chloride (PVC)-nylon nanofiltration membrane was synthesized and utilized to minimize and/or eliminate CaCO 3 /brine during RO, along with probing the effects of Cu–ZnO antiscalant on calcite precipitation in normal aqueous and supersaturated CaCO 3 /brine solutions. Moreover, decreases in Ca 2+ content over time were evaluated by electrical conductivity and pH measurements. Results revealed that Cu–ZnO nanocomposite substantially increases induction time and stimulates the formation of aragonite rather than calcite. A 2 mg/L dose of Cu–ZnO nanocomposite suppressed CaCO 3 in both unsaturated and supersaturated solutions. In natural water sources (containing ∼500 mg/L calcium and ≈300 mg/L bicarbonate content), complete removal of CaCO 3 blockage was achieved by using 2.5 mg/L of Cu–ZnO antiscalant, while in supersaturated water solutions (1000 mg/L calcium and ≈500 mg/L bicarbonate content), only 2 mg/L of Cu–ZnO antiscalant was required to fully remove the blockage. Importantly, addition of 2 mg/L of Cu–ZnO antiscalant to RO brine showed no apparent deposition on the membrane surface after 6 h, with a minimal flux decrease to 86.5%. Thus, Cu–ZnO-PVC-nylon nanofiltration membranes with low concentrations (2 mg/L) of Cu–ZnO antiscalant can play a significant role in the treatment of supersaturated CaCO 3 /brine water discharge." @default.
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- W3032591566 date "2020-05-01" @default.
- W3032591566 modified "2023-10-18" @default.
- W3032591566 title "Enhanced desalination process using a Cu–ZnO-polyvinyl chloride-nylon nanofiltration membrane as a calcite antiscalant in reverse osmosis" @default.
- W3032591566 doi "https://doi.org/10.1166/mex.2020.1677" @default.
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