作　　者： ; ; ; ; ;

机构地区： 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室

出　　处： 《农业环境科学学报》 2006年第6期1455-1458,共4页

摘　　要： 通过高羊茅盆栽土培实验,研究了施加污泥堆肥对土壤中有效态重金属含量的影响以及重金属的生物有效性和土壤中有效态含量之间的关系。结果表明,土壤中有效态重金属的含量随污泥施入量的增加而升高,在相似的土壤成分和性质条件下,Zn、Cu的生物有效性较高,其次是Cr、Ni,Pb,Cd最低。Zn的生物有效性随其在土壤中的有效态含量增加而显著升高,当混配土中有效态Zn的浓度由14.5升高到61.2mg.kg-1时,Zn的生物有效性升高近6倍。 Bioavailability of Cd, Cu, Ni, Pb, Cr and Zn was investigated with three different ratios of sludge compost to soil in a pot scale experiment. Soils free of sludge compost were used as the control. Heavy metals in soils and plants were analyzed after tall rescue （Festuca arundinacea Schreb.） had been grown on the amended soils for 97 days. Chemical fraction of composts and amended soils were analyzed with a sequential extraction technique. MgCl2 and NaAc-HAc extractable fractions of most heavy metals were generally higher in the sludge compost amended soils comparing to the controls, especially for Zn. When the application rate increased from 0 to 10% （m/m）, the sum of these two fractions increased nearly 4 times. With similar soil properties, the bioavailability of heavy metals decreased in the order： Zn and Cu〉Cr and Ni〉Pb and Cd. The bioavailability of Zn increased as the sum of MgCl2 and NaAc-HAc extractable fractions increased. A 6-folds-increase in its bioavailability was found when the sum of MgCl2 and NaAc-HAc extractable fractions of Zn increased from 14.5 mg· kg^-1 to 61.2 mg·kg^-1 in sludge treated soil.

关 键 词： 重金属 生物有效性 污泥堆肥 高羊茅

领　　域： [环境科学与工程]