Removal of co-present chromate and arsenate by zero-valent iron in groundwater with humic acid and bicarbonate

• Published in: Water research (Oxford) Vol. 43; no. 9; pp. 2540 - 2548
• Main Authors: Liu, Tongzhou, Rao, Pinhua, Mak, Mark S.H., Wang, Peng, Lo, Irene M.C.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2009; Elsevier
• Subjects: Adsorption; Applied sciences; arsenates; Arsenates - isolation & purification; arsenic; As(V) adsorption; Bicarbonates; chemical degradation; chemistry; Chromated copper arsenate; Chromates; Chromates - isolation & purification; chromium; Cr(VI) reduction; electrolytes; Exact sciences and technology; groundwater contamination; Humic acid; humic acids; Humic Substances; Hydrogen-Ion Concentration; iron; Iron - chemistry; iron hydroxides; isolation & purification; kinetics; Mass Spectrometry; methods; Other industrial wastes. Sewage sludge; Pollution; solubility; Wastes; Water Pollutants, Chemical; Water Pollutants, Chemical - isolation & purification; Water Purification; Water Purification - methods; water treatment; Water treatment and pollution; Zero-valent iron; Chromated copper arsenate; As(V) adsorption; Cr(VI) reduction; Humic acid; Zero-valent iron; Organic matter; Arsenates; Adsorption site; Zerovalent metal; Corrosion product; Adsorption; Corrosion; Batchwise; Kinetics; Colloid particle; Ground water

The interactions of co-present Cr(VI) and As(V), and the influences of humic acid and bicarbonate in the process of Cr(VI) and As(V) removal by Fe 0 were investigated in a batch setting using simulated groundwater with 5 mM NaCl, 1 mM Na 2SO 4, and 0.8 mM CaCl 2 as background electrolytes at an init...