Heavy metal accumulation in soil after application of organic wastes
Heavy metal accumulation in soil after application of organic wastes
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DOI：
10.1007/s12517-011-0328-1
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发表时间：
2013-02
影响因子：
--
通讯作者：
M. Fekri;S. Kaveh
中科院分区：
文献类型：
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作者：
M. Fekri;S. Kaveh
城市固体废物堆肥和牛粪在农业和园艺中用作有机肥料。然而，这些废物也可能对农业环境产生一些负面影响。在温室条件下，研究了城市生活垃圾堆肥（MSC）和牛粪（CM）对石灰性土壤重金属有效性的影响。将MSC和CM以干物质的0%、2%和4%的比率与土壤充分混合。经过90天的培养，对土壤样品进行了分析。与对照相比，两种有机废弃物处理均显著降低了土壤pH值，提高了土壤EC值，增加了土壤中Cd、Pb、Cu、Zn和Cu的有效态含量。土壤中重金属的含量，MSC处理的土壤样品高于CM。有机废弃物的重金属含量远低于美国环保局允许的最大值。建议伊朗必须确定有机废物中重元素的法律的最大允许限量。
Municipal solid waste compost and cattle manure are used as organic fertilizers in agriculture and horticulture. These wastes, however, may also have some negative effects on the agricultural environment. This study investigates the effects of municipal solid waste compost of Kerman (MSC) and cattle manure (CM) on availability of the heavy metal in calcareous soil (extractable with EDTA) in greenhouse conditions. The MSC and CM were mixed thoroughly with soil at rates of 0%, 2%, and 4% of dry matter. After 90 days of incubation, the soil samples were analyzed. Addition of levels of each two organic wastes into soil significantly decreased the soil pH and increased the soil EC as compared with control (unamended soil).The available contents (EDTA-extractable) of Cd, Pb, Cu, Zn, and Cu in the soil samples were increased because of each two organic treatments applied. The heavy metal contents in the soil samples amended with MSC were more than CM. The heavy metal contents of organic wastes were well below the maximum allowed by USEPA. It is recommended that in Iran, the legal maximum permissible limit for heavy elements in organic wastes must be determined.