Effect of calcium on adsorptive removal of As(III) and As(V) by iron oxide-based adsorbents.
作者： V Uwamariya , B Petrusevski , Piet Nl L Lens , G Amy
DOI: 10.1080/09593330.2014.934739
关键词:
摘要: The effects of calcium on the equilibrium adsorption capacity As(III) and As(V) onto iron oxide-coated sand (IOCS) granular ferric hydroxide (GFH) were investigated through batch experiments, rapid small-scale column tests (RSSCT) kinetics modelling. Batch experiments showed that at concentrations≤20 mg/L, high removal efficiencies by IOCS GFH are achieved pH 6. An increase concentration to 40 80 mg/L reversed this trend, giving higher (8). capacities an arsenic 10 μg/L found be between 2.0 3.1 mg/g for synthetic water without 2.8 5.3 mg/g when was present studied values. After 10 hours filter run in RSSCT, approximately 1000 empty bed volumes, ratios C/Co 26% 18% calcium-free model water; only 1% 0.2% after addition Ca filter...
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