黄棕壤添加重金属的毒性评价及其临界浓度确定
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EVALUATION OF TOXICITY OF HEAVY METALS ADDED TO YELLOW-BROWN EARTH AND ESTIMATION OF THEIR CRITICAL CONCENTRATIONS
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    摘要:

    在连续盆栽水稻、小麦的过程中研究了加入黄棕壤的Cu、Cd、Pb的毒性(发光细菌法)。结果表明,当以水提取黄棕壤中三元素,浓度低,不显毒性,这与水提取红壤的结果相反;当以0.1mol L-1HCI提取黄棕壤中三元素,则浓度明显提高而显示毒性。在相关显著水平P=0.001的基础上建立了土壤金属浓度与剩余发光度(毒性指标)优化拟合方程。规定含金属土壤的临界剩余发光度为90%(EC10)。据此,估算出黄棕壤中Pb、Cu、Cd的临界浓度(μg/g土)分别为:488-587,17.8-25.3,2.11-2.12。

    Abstract:

    The toxicity of yellow-brown earth added with Cu, Cd, or Pb was researched using the MICROTOX method in the process of successively growing of paddy and wheat in a pot experinvent. It was confirmed that when three metal elements in yellowbrown earth were extracted by water, their concentrations were too low to display toxicity as contrasted with red soil; but when extracted by 0.1 mol L-1 HCl, their concentrations rose obviously and toxicity appeared. The optimum quasi-conjunction equarion between metal's concentration in soil and its remanent luminosty (toxicity index) was founded on the basis of correlation significance at p=0.01 level. The critical remanent luminosity of soils containing metals was defind as 90% (EC10). Accordingly, the critical concentrations of Pb, Cu and Cd in yellowbrown earth (grown with preceeding crop) were estimated to be 488-587, 17.8-25.3 and 1.11-2.12 mg/Kg soil, respectively.

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顾宗濂,吴留松,谢思琴,周德智.黄棕壤添加重金属的毒性评价及其临界浓度确定[J].土壤学报,1992,29(2):158-167. Gu Zonglian, Wu Liusong, Xie Siqin, Zhou Dezhi. EVALUATION OF TOXICITY OF HEAVY METALS ADDED TO YELLOW-BROWN EARTH AND ESTIMATION OF THEIR CRITICAL CONCENTRATIONS[J]. Acta Pedologica Sinica,1992,29(2):158-167.

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  • 在线发布日期: 2013-02-25
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