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Content of Heavy Metals in Animal Feeds and Manures from Farms of Different Scales in Northeast China
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
* Author to whom correspondence should be addressed.
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 pig feeds, 2.88–98.08 mg Cu/kg dm, 0.02–6.42 mg As/kg dm and non-detectable (nd)–8.00 mg Cd/kg dm in poultry feeds, and their content in cattle feeds was similar to that in poultry feeds. The typical content in pig manures was 642.1 mg Cu/kg dm, 8.6 mg As/kg dm, and 15.1 mg Cd/kg dm, which reflected the metal contents in feeds. The typical contents in poultry manures were 65.6 mg Cu/kg dm, 3.3 mg As/kg dm and 1.6 mg Cd/kg dm while the contents in cattle manures were 31.1 mg Cu/kg dm, 2.5 mg As/kg dm and 0.5 mg Cd/kg dm. Animal manure is an important source of heavy metals to the environment in Northeast China.
Keywords: heavy metal; livestock feed; animal manure; Northeast China
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Zhang, F.; Li, Y.; Yang, M.; Li, W. Content of Heavy Metals in Animal Feeds and Manures from Farms of Different Scales in Northeast China. Int. J. Environ. Res. Public Health 2012, 9, 2658-2668.
Zhang F, Li Y, Yang M, Li W. Content of Heavy Metals in Animal Feeds and Manures from Farms of Different Scales in Northeast China. International Journal of Environmental Research and Public Health. 2012; 9(8):2658-2668.
Zhang, Fengsong; Li, Yanxia; Yang, Ming; Li, Wei. 2012. "Content of Heavy Metals in Animal Feeds and Manures from Farms of Different Scales in Northeast China." Int. J. Environ. Res. Public Health 9, no. 8: 2658-2668.