title: Food chain transfer of cadmium and lead to cattle in a lead-zinc smelter in Guizhou, China.
abstract: Cadmium (Cd) and Lead (Pb) are environmental pollutants. Environmental samples and bovine tissues were collected from the areas around a lead-zinc smelter in Guizhou, China for Cd, Pb, zinc (Zn) and copper (Cu) analysis. Cd in soil (10 mg/kg) and feed (6.6 mg/kg) from the polluted areas was 10 times higher than the Chinese Standards, resulting in higher Cd in bovine kidney (38 mg/kg) and liver (2.5 mg/kg). Pb in feed (132 mg/kg) from the polluted area was much higher than unpolluted areas, causing higher Pb levels in bovine tissues. Environmental Zn was elevated, but bovine tissue Zn was normal. Cu in bovine liver decreased with increased Cd and Pb. Metals in drinking water and in bovine muscle were within the Standard range. Thus, in the areas of this lead-zinc smelter, the environment has been contaminated with Cd and Pb, which has been transferred to cattle through the food chain.
authors: Guizhou Import-Export Inspection Bureau, Guiyang, China. caiqiu1029@126.com
authors: Qiu
authors: Q
authors: Cai
authors: Mei-Li
authors: ML
authors: Long
authors: Ming
authors: M
authors: Zhu
authors: Qing-Zhen
authors: QZ
authors: Zhou
authors: Ling
authors: L
authors: Zhang
authors: Jie
authors: J
authors: Liu
mesh_terms: D000818:Animals; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D002417:Cattle / Q000378:metabolism*; D002681:China; D004785:Environmental Pollutants / Q000032:analysis / Q000378:metabolism*; D020387:Food Chain; D007668:Kidney / Q000737:chemistry / Q000378:metabolism; D007854:Lead / Q000378:metabolism*; D008099:Liver / Q000737:chemistry / Q000378:metabolism; D008669:Metallurgy; D015032:Zinc / Q000032:analysis / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D002104:Cadmium; D007854:Lead; D015032:Zinc