Observation of Surface Precipitation of Arsenate on Ferrihydrite

X-ray diffraction and Raman spectroscopy were used in this study to characterize arsenate phases in the arsenate−ferrihydrite sorption system. Evidence has been obtained for surface precipitation of ferric arsenate on synthetic ferrihydrite at acidic pH (3−5) under the following experimental conditi...

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Veröffentlicht in:	Environmental science & technology 2006-05, Vol.40 (10), p.3248-3253
Hauptverfasser:	Jia, Yongfeng, Xu, Liying, Fang, Zhen, Demopoulos, George P
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorption Applied sciences Arsenates - analysis Arsenates - chemistry Arsenic Chemical compounds Chemical Precipitation Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Environmental Monitoring Exact sciences and technology Ferric Compounds - chemistry Geological Phenomena Geology Global environmental pollution Hydrogen-Ion Concentration Pollution Pollution, environment geology Precipitation Solubility Spectrum analysis Spectrum Analysis, Raman Water Pollutants, Chemical Water Supply X-Ray Diffraction
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Zusammenfassung:	X-ray diffraction and Raman spectroscopy were used in this study to characterize arsenate phases in the arsenate−ferrihydrite sorption system. Evidence has been obtained for surface precipitation of ferric arsenate on synthetic ferrihydrite at acidic pH (3−5) under the following experimental conditions: sorption density of As/Fe ∼0.125−0.49 and arsenic equilibrium concentration of
ISSN:	0013-936X 1520-5851
DOI:	10.1021/es051872+