Misra Virendra, Tiwari Anjana, Shukla Bhaskar, Seth Chandra Shekhar
Ecotoxicology Division, Indian Institute of Toxicology Research, P.O. Box 80, M.G. Marg, Lucknow 226001, India.
Environ Monit Assess. 2009 Aug;155(1-4):467-75. doi: 10.1007/s10661-008-0449-5. Epub 2008 Jul 16.
A study was conducted to test the effects of soil amendments on the bioavailability of heavy metals in a zinc mine tailings containing soil to plants, using the Indian mustard plant (Brassica juncea) as a test organism. Zinc mine tailing containing soil was amended with humus soil (HS) and phosphatic clay (PC). The zinc mine tailing containing soil (ZMTS) was characterized for heavy metals. It was mixed with PC and HS, and four mixtures were prepared. The first mixture contained ZMTS, and served as a control. The second mixture contained ZMTS and PC in the ratio of 1:1 (w/w). The third mixture contained ZMTS and HS in the ratio of 1:1(w/w). The fourth mixture containing ZMTS, PC and HS in the ratio of (2:1:1) (w/w). A slight increase in the bioavailability of Pb, Cu, Zn and Mn was noticed with increase in the incubation time from 14 to 42 days. The bioavailability of Pb, Cu, Zn and Mn from ZMTS alone in Brassica plant was in the range of 94-99% up to 42 days. Addition of PC and HS to the ZMTS soil reduced the bioavailabilities of Pb by (15%), of Cu by (20%), of Zn by (20%) and of Mn by (25%) in the mustard plant. The data showed that PC in the presence of HS had a high affinity for the heavy metals in the order of Pb, Cu, Zn and Mn.
开展了一项研究，以测试土壤改良剂对含锌矿尾矿土壤中重金属对植物生物有效性的影响，使用印度芥菜（Brassica juncea）作为受试生物。用腐殖土（HS）和磷质黏土（PC）对含锌矿尾矿土壤进行改良。对含锌矿尾矿土壤（ZMTS）的重金属进行了表征。将其与PC和HS混合，制备了四种混合物。第一种混合物包含ZMTS，用作对照。第二种混合物包含ZMTS和PC，比例为1:1（重量/重量）。第三种混合物包含ZMTS和HS，比例为1:1（重量/重量）。第四种混合物包含ZMTS、PC和HS，比例为（2:1:1）（重量/重量）。随着培养时间从14天增加到42天，铅、铜、锌和锰的生物有效性略有增加。在长达42天的时间里，仅ZMTS中铅、铜、锌和锰在芥菜植物中的生物有效性范围为94 - 99%。向ZMTS土壤中添加PC和HS后，芥菜植物中铅的生物有效性降低了（15%），铜降低了（20%），锌降低了（20%），锰降低了（25%）。数据表明，在HS存在的情况下，PC对重金属具有高亲和力，顺序为铅、铜、锌和锰。
