Heavy metals contamination in vegetables grown in urban and metal smelter contaminated sites in Australia
Heavy metals contamination in vegetables grown in urban and metal smelter contaminated sites in Australia
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DOI：
10.1007/s11270-006-2027-1
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发表时间：
2006-01-01
影响因子：
2.9
通讯作者：
Singh, B
中科院分区：
文献类型：
--
作者：
Kachenko, A;Singh, B
重金属，即镉（Cd），铅（Pb），锌（Zn）和铜（Cu）的饮食暴露已被确定为通过食用蔬菜作物对人类健康的风险。本研究调查了澳大利亚新南威尔士州四个蔬菜种植区46个地点土壤和蔬菜样品中重金属污染的来源和程度。布拉鲁、肯布拉港、考拉和悉尼盆地这四个地区是商业和住宅蔬菜种植区的混合体。取样土壤中的金属污染程度在冶炼厂附近地区最大，如布拉鲁和肯布拉港。土壤金属浓度随深度在这两个网站，表明由于人为活动的污染。镉，铅和锌的污染是最大的蔬菜从布拉鲁，铜的浓度最大的蔬菜从肯布拉港采样。在布拉鲁，几乎所有的样本都超过了澳大利亚食品标准的最高水平（ML）（0.01毫克千克（-1。鲜重）。超过63%的样本超过欧洲共同体委员会和食品法典委员会制定的国际食品标准准则。所有从Cowra采样的蔬菜，这是一个相对原始的网站有镉和铅含量低于澳大利亚和国际食品标准的指导值。这项研究表明，澳大利亚的指导值是更保守的，在定义蔬菜作物中的镉和铅的ML。这项调查突出表明，在冶炼厂附近种植蔬菜的危险增加。
Dietary exposure to heavy metals, namely cadmium (Cd), lead (Pb), zinc (Zn) and copper (Cu), has been identified as a risk to human health through the consumption of vegetable crops. This study investigates the source and magnitude of heavy metal contamination in soil and vegetable samples at 46 sites across four vegetable growing regions in New South Wales, Australia. The four regions Boolaroo, Port Kembla, Cowra and the Sydney Basin were a mix of commercial and residential vegetable growing areas. The extent of metal contamination in soils sampled was greatest in regions located in the vicinity of smelters, such as in Boolaroo and Port Kembla. Soil metal concentrations decreased with depth at these two sites, suggesting contamination due to anthropogenic activities. Cadmium, Pb and Zn contamination was greatest in vegetables from Boolaroo, and Cu concentrations were greatest in vegetables sampled from Port Kembla. At Boolaroo, nearly all the samples exceeded the Australian Food Standards maximum level (ML) (0.01 mg kg(-1.) fresh weight) of Cd and Pb in vegetables. Over 63% of samples exceeded international food standard guidelines set by the Commission of the European Communities and the Codex Alimentarius Commission. All vegetables sampled from Cowra, which is a relatively pristine site had Cd and Pb levels below the Australian and international food standards guideline values. This study suggests that the Australian guideline values are more conservative in defining the ML for Cd and Pb in vegetable crops. This investigation highlights the increased danger of growing vegetables in the vicinity of smelters.