title: Arsenic pollution of agricultural soils by concentrated animal feeding operations (CAFOs).
abstract: Animal wastes from concentrated animal feeding operations (CAFOs) can cause soil arsenic pollution due to the widespread use of organoarsenic feed additives. This study investigated the arsenic pollution of surface soils in a typical CAFO zone, in comparison with that of agricultural soils in the Pearl River Delta, China. The mean soil arsenic contents in the CAFO zone were elevated compared to those in the local background and agricultural soils of the Pearl River Delta region. Chemical speciation analysis showed that the soils in the CAFO zone were clearly contaminated by the organoarsenic feed additive, p-arsanilic acid (ASA). Transformation of ASA to inorganic arsenic (arsenite and arsenate) in the surface soils was also observed. Although the potential ecological risk posed by the arsenic in the surface soils was relatively low in the CAFO zone, continuous discharge of organoarsenic feed additives could cause accumulation of arsenic and thus deserves significant attention.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Xueping
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Yuanan
authors.initials: Y
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Erdan
authors.initials: E
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Xiande
authors.initials: X
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: hefac@umich.edu.
authors.forename: Hefa
authors.initials: H
authors.lastname: Cheng
mesh_terms: D000383:Agriculture; D000821:Animal Feed; D000818:Animals; D001147:Arsanilic Acid / Q000032:analysis*; D001151:Arsenic / Q000032:analysis*; D002681:China; D016000:Cluster Analysis; D004784:Environmental Monitoring; D008372:Manure; D025341:Principal Component Analysis; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D008372:Manure; D012989:Soil Pollutants; D001151:Arsenic; D001147:Arsanilic Acid
keywords: Animal wastes; Arsenate; Arsenite; Environmental fate; Organoarsenic feed additive; Soil pollution