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首页> 外文会议>2009 ISEST;International symposium on environmental science and technology >Leaching Experiments on Cd Releasing from Some Factory-bearing Soils of Changsha-Zhuzhou, Hunan, China
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Leaching Experiments on Cd Releasing from Some Factory-bearing Soils of Changsha-Zhuzhou, Hunan, China

机译：湖南长株潭部分工厂化土壤中镉释放的淋溶实验

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The experiments of simulative acid rain leaching soils samples from Zhuzhou Smeltery and Changsha Chromate Factory (Hunan) revealed high concentrations of Cd in the soil as well as in adjacent soils. In these investigations, experimental leaching of Cd-containing soils was performed in the laboratory. The three types of acid rain solutions which were used in the leach experiments to waters of pH 3.5, pH 4.5, and pH 5.6. The results show that acid rain accelerates the releasing of Cd from the soils, the average leaching Cd concentrations at pH 3.5 and pH 4.5 were about 1.80-2.98 times more than that of pH 5.6, which had remarkable correlativity with Cd concentration and binding forms in soil samples. The correlation coefficient is 0.94 between Cd and Zn, 0.82 between Cd and Cr, -0.35 between Cd and Pb in the runoff leachate of sample S1; while in S2 sample, the correlation coefficient is 0.59 between Cd and Cr, 0.68 between Cd and Pb. The origin of Cd had good relationship for factory production. Assay of the leach solutions, Cd concentration was higher than that of the state standard content of Ⅴ surface water (GB 3838-2002), especially in S1, the Cd concentration leaching from pH 3.5 and pH4.5 was 1037 and 768 times higher than that of the State Standard content. With time of the acid rain leaching, Cd could be released more quickly from the factory-bearing soils. In the absence of an effective remediation program, Cd release will be an environmental problem.
机译：湖南株洲冶炼厂和长沙铬酸盐厂的模拟酸雨淋滤土壤样品的实验表明，土壤以及邻近土壤中的镉含量很高。在这些调查中，在实验室中对含Cd的土壤进行了实验浸出。在浸出实验中使用了三种类型的酸雨溶液，分别用于pH 3.5，pH 4.5和pH 5.6的水。结果表明，酸雨促进了Cd从土壤中的释放，pH 3.5和pH 4.5的平均浸出Cd浓度是pH 5.6的1.80-2.98倍，与土壤中Cd的浓度和结合形式有着显着的相关性。土壤样品。在样品S1的径流渗滤液中，Cd和Zn之间的相关系数为0.94，Cd和Cr之间的相关系数为0.82，Cd和Pb之间的相关系数为-0.35。在S2样品中，Cd和Cr之间的相关系数为0.59，Cd和Pb之间的相关系数为0.68。镉的来源与工厂生产有良好的关系。测定浸出液中的镉浓度要高于国家标准规定的Ⅴ地表水含量（GB 3838-2002），特别是在S1中，从pH 3.5和pH4.5浸出的Cd浓度要比其高出1037和768倍。国家标准内容的内容。随着酸雨浸出的时间，Cd可以更快地从工厂生产的土壤中释放出来。如果没有有效的补救方案，Cd的释放将是一个环境问题。

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