content of heavy metals in animal feeds and manures from farms of different scales in northeast china重金属在动物饲料和肥料的内容从不同尺度在中国东北的农场.pdfVIP

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content of heavy metals in animal feeds and manures from farms of different scales in northeast china重金属在动物饲料和肥料的内容从不同尺度在中国东北的农场.pdf

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content of heavy metals in animal feeds and manures from farms of different scales in northeast china重金属在动物饲料和肥料的内容从不同尺度在中国东北的农场

Int. J. Environ. Res. Public Health 2012, 9, 2658-2668; doi:10.3390/ijerph9082658 OPEN ACCESS International Journal of Environmental Research and Public Health ISSN 1660-4601 /journal/ijerph Article Content of Heavy Metals in Animal Feeds and Manures from Farms of Different Scales in Northeast China Fengsong Zhang 1, Yanxia Li 2,*, Ming Yang 2 and Wei Li 2 1 State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; E-Mail: zhangfs@ 2 State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; E-Mails: Yangming_shida@163.com (M.Y.); gscas2012@163.com (W.L.) * Author to whom correspondence should be addressed; E-Mail: liyxbnu@; Tel.: +86-10-8491-5182; Fax: +86-10-8491-3903. Received: 1 June 2012; in revised form: 12 July 2012 / Accepted: 19 July 2012 / Published: 27 July 2012 Abstract: To determine the contents of heavy metal (Cu, Zn, As, Cr, Cd and Pb) in animal feeds and manures, 104 livestock feeds and 118 animal manure samples from farms of different herd size and located in northeast China were collected and their heavy metal concentrations were determined. The content of Cu, As and Cd ranged from 2.3–1,137.1 mg/kg dm, 0.02–13.03 mg/kg dm and non-detectable (nd)−31.65 mg/kg dm in