Abad-Valle P, Álvarez-Ayuso E, Murciego A
Department of Environmental Geochemistry, IRNASA (CSIC), C/ Cordel de Merinas 40-52, 37008, Salamanca, Spain.
Environ Sci Pollut Res Int. 2015 May;22(9):6778-88. doi: 10.1007/s11356-014-3868-6. Epub 2014 Nov 29.
The effectiveness of ferrihydrite as amendment to restore the soil habitat functioning of a soil polluted with As by mining activities was evaluated. Its influence on As mobility and phytoavailability was also assessed. Soil treated with increasing amendment doses (0, 1, 2, and 5 %) were analyzed for soil microbiological parameters such as basal soil respiration and dehydrogenase, β-glucosidase, urease, acid and alkaline phosphatase, and arylsulfatase activities. Batch leaching tests and plant growth experiments using ryegrass and alfalfa plants were performed. The treatment with ferrihydrite was effective to reduce As mobility and plant As uptake, translocation, and accumulation. Likewise, the soil microbiological status was generally improved as derived from basal soil respiration and dehydrogenase and acid and alkaline phosphatase activities, which showed increases up to 85, 45, 11, and 47 %, respectively, at a ferrihydrite addition rate of 5 %.
评估了水铁矿作为修复因采矿活动而被砷污染土壤的土壤生境功能改良剂的有效性。还评估了其对砷迁移性和植物有效性的影响。分析了用递增改良剂剂量（0%、1%、2%和5%）处理的土壤的土壤微生物学参数，如基础土壤呼吸、脱氢酶、β-葡萄糖苷酶、脲酶、酸性和碱性磷酸酶以及芳基硫酸酯酶活性。进行了批量淋溶试验以及使用黑麦草和苜蓿植物的植物生长实验。水铁矿处理有效地降低了砷的迁移性以及植物对砷的吸收、转运和积累。同样，从基础土壤呼吸、脱氢酶以及酸性和碱性磷酸酶活性来看，土壤微生物学状况总体上得到了改善，在水铁矿添加率为5%时，这些指标分别提高了85%、45%、11%和47%。
