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Cr(VI) has posed great threat on environmental safety and human health, thus the remediation of Cr(VI) pollution is of considerable importance. The adsorption of Cr(VI) from aquatic solution using activated carbon was studied in this paper. The Cr(VI) sorption was relative to pH, contact time, initial content of solution, adsorbent dose and temperature. The maximum removal efficiencies of Cr(VI) were...
Ammonia addition and pH depression can inhibit the formation of bromate in ozonated drinking water by reacting with free bromine (HOBr/OBr-), an intermediate in bromate formation, to form bromamines and other bromoorganic disinfection byproducts. This study was performed to assess the effects of ammonia and pH value combinations on the formation of bromate and THMs during ozonation and chlorination...
The influence of co-existing chloride, sulfate, pH, and temperature to defluoridation of groundwater using nanofiltration membrane and membrane fouling were studied. The results show that nanofiltration has retention effect to all co-existing ions. When feed fluoride concentration was less than 6 mg/L, the fluoride concentration in permeated water was less than 1.2 mg/L which could reach the drinking...
The adsorption process of heavy metal ions from aqueous solution by konjac glucomannan based resin (KGR) was investigated. The adsorption capacity is found to be dependent on the pH of the solution, the effects of adsorption time, the dosage of different adsorbents, the initial concentration of heavy metal ion and temperature. Moreover, the adsorption capacity increases with the increasing degree...
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