【摘要】 以干湿分离后的猪粪为基质,接种赤子爱胜蚓（Eisenia fetida）,在室内培养4周后,利用电感耦合等离子体质谱法（ICP-MS）测定猪粪和蚯蚓体内的重金属（Cu,Zn,Cr,Pb,Cd,As）的含量,系统研究了蚯蚓作用下猪粪中重金属形态变化及蚯蚓体内重金属的富集特征。结果表明:供试猪粪能促进蚯蚓的生长,4周后体质量明显增加,且对蚯蚓的繁殖没有影响。蚯蚓处理4周后,猪粪pH值由6.51增加至6.86。猪粪中Cu,Zn,Cr,Pb,Cd,As的总量与对照组相比,分别降低了13.69%,24.47%,30.70%,39.17%,21.91%,9.36%;同时,猪粪中Zn,Cr,Cd的残渣态比例相比对照组分别减少了15%,27%,27%。蚯蚓对重金属有一定富集作用,除Cr以外,Cu,Zn,Cd,As 4种重金属在蚯蚓体内的质量含量相比实验前分别增加了0.49,3.86,0.012,0.064 mg·kg^-1,并表现出一定的时效关系,其富集系数大小顺序为Cr>Cd>Zn>Cu>As。研究表明,蚯蚓能富集猪粪中的重金属并且降低猪粪中的重金属含量,同时减少了猪粪中的部分重金属残渣态比例,有利于重金属的转移和去除。更多还原

【Abstract】 Pig manure separated from the dry and the wet was used as substrate, inoculated with earthworms（Eisenia fetida） and cultured indoors for 4 weeks. The contents of heavy metals（Cu, Zn, Cr, Pb, Cd, As） in the pig manure and earthworms were determined by the inductively coupled plasma mass spectrometry（ICP-MS）. The speciation changes in the pig manure and the enrichment of heavy metals in the earthworms were systematically analyzed under the action of the earthworms. The experimental results showed that the pig manure promoted the growth of earthworms, increased the body weight of the earthworms obviously after 4 weeks of treatment and had no effect on the reproduction of the earthworms. After 4 weeks of earthworm treatment, the pH value of the pig manure increased from 6.51 to 6.86. The total amount of Cu, Zn, Cr, Pb, Cd and As in the pig manure decreased by 13.69%, 24.47%, 30.70%, 39.17%, 21.91% and 9.36%, respectively, compared with the control group. Meanwhile, the proportion of Zn, Cr and Cd in the pig manure decreased by 15%, 27% and 27%, respectively compared with the control group. The earthworms had a certain effect on enrichment of heavy metals. The concentrations of Cu, Zn, Cd and As, except for Cr, in the earthworms increased by 0.49 mg·kg^-1, 3.86 mg·kg^-1, 0.012 mg·kg^-1 and 0.064 mg·kg^-1, respectively compared with those before the experiment, and showed a time-effect relationship. The biota-sediment accumulation factors increased in the order of Tr>Cd>Zn>Cu>As. This indicates the earthworms can enrich heavy metals and reduce the content of heavy metals in the pig manure and the proportion of heavy metals in the form of residue in the pig manure, which is conducive to the transfer and removal of heavy metals.更多还原