Brown Sally, Christensen Barbara, Lombi Enzo, McLaughlin Mike, McGrath Steve, Colpaert Jan, Vangronsveld Jaco
Box 352100 University of Washington, Seattle, WA 98195, USA.
Environ Pollut. 2005 Nov;138(1):34-45. doi: 10.1016/j.envpol.2005.02.020.
An international inter-laboratory research program investigated the effectiveness of in situ remediation of soils contaminated by cadmium, lead and zinc, measuring changes in soil and soil solution chemistry, plants and soil microbiota. A common soil, from mine wastes in Jasper County MO, was used. The soil was pH 5.9, had low organic matter (1.2 g kg(-1) C) and total Cd, Pb, and Zn concentrations of 92, 5022, and 18 532 mg kg(-1), respectively. Amendments included lime, phosphorus (P), red mud (RM), cyclonic ashes (CA), biosolids (BIO), and water treatment residuals (WTR). Both soil solution and NH4NO3 extractable metals were decreased by all treatments. Phytotoxicity of metals was reduced, with plants grown in P treatments having the highest yields and lowest metal concentration (0.5, 7.2 and 406 mg kg(-1) Cd, Pb, and Zn). Response of soil micro-organisms was similar to plant responses. Phosphorus addition reduced the physiologically based extraction test Pb from 84% of total Pb extracted in the untreated soil to 34.1%.
一个国际实验室间研究项目调查了原位修复镉、铅和锌污染土壤的有效性，测量了土壤、土壤溶液化学、植物和土壤微生物群的变化。使用了来自密苏里州贾斯珀县矿山废料的一种常见土壤。该土壤的pH值为5.9，有机质含量低（1.2 g kg(-1) C），镉、铅和锌的总浓度分别为92、5022和18532 mg kg(-1)。改良剂包括石灰、磷（P）、赤泥（RM）、旋风炉灰（CA）、生物固体（BIO）和水处理残渣（WTR）。所有处理均降低了土壤溶液和NH4NO3可提取金属的含量。金属的植物毒性降低，在P处理中生长的植物产量最高，金属浓度最低（镉、铅和锌分别为0.5、7.2和406 mg kg(-1)）。土壤微生物的反应与植物反应相似。添加磷使基于生理学的提取试验中铅的提取量从未处理土壤中总铅的84%降至34.1%。
