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首页> 外文期刊>Journal of Microbiology, Biotechnology and Food Sciences >BIOCONCENTRATION OF HEAVY METALS IN VERMICOMPOSTING EARTHWORMS (Eisenia fetida, Perionyx excavatus and Lampito mauritii) IN NEPAL
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BIOCONCENTRATION OF HEAVY METALS IN VERMICOMPOSTING EARTHWORMS (Eisenia fetida, Perionyx excavatus and Lampito mauritii) IN NEPAL

机译：尼泊尔粪（Eisenia fetida，Perionyx excavatus和Lampito mauritii）中重金属的生物富集

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摘要

Vermicomposting of organic waste can play an important part during the waste management process in larger cities such as Kathmandu where 70% of the waste generated is organic. In this study, the possibility of heavy metal (Pb, Cd, Cu and Cr) bioaccumulation by three different species of earthworms Eisenia fetida, Lampito mauritii and Perionyx excavatus in domestic waste vermicompost was investigated. Quantification of heavy metals by Atomic Absorption Spectroscopy(AAS) in final vermicompost showed a significant reduction in concentration of metals, Pb (11.4-26.0%), Cd (48-61%), Cu (4.9- 29.01%) and Cr (18.90-33.60%) at the end. Bioaccumulation of heavy metal in the composting earthworms was also recorded. Comparison of the three groups of earthworms showed that the bioaccumulation of Pb, Cu and Cr was greater for P. excavatus whereas E. fetida was the most reluctant. Heavy metal content in the vermicompost was within the limit of USEPA for Biosolids and the compost could be used for the agriculture purpose.
机译：在大城市（如加德满都）中，有机废物的com堆肥可在废物管理过程中发挥重要作用，而这些城市产生的废物中有70％是有机废物。在这项研究中，调查了三种不同种类的f Eisenia fetida，Lampito mauritii和Perionyx exavatus在生活垃圾ver堆中重金属（Pb，Cd，Cu和Cr）生物富集的可能性。通过原子吸收光谱法（AAS）对最终ver堆中的重金属进行定量分析，结果表明，金属，铅（11.4-26.0％），镉（48-61％），铜（4.9-29.01％）和铬（18.90）的浓度显着降低-33.60％）。还记录了堆肥earth中重金属的生物富集。对这三类showed的比较表明，P。exavatus的Pb，Cu和Cr的生物积累量更大，而F. fetida最不愿意。 com堆肥中的重金属含量在USEPA规定的生物固体限量之内，堆肥可用于农业用途。

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