Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, 3a Planta, E-08028 Barcelona, Spain.
Chemosphere. 2012 May;87(8):829-37. doi: 10.1016/j.chemosphere.2012.01.015. Epub 2012 Feb 10.
The effect of the addition of materials on the leaching pattern of As and metals (Cu, Zn, Ni, Pb, and Cd) in two contaminated soils was investigated. The examined materials included bentonites, silicates and industrial wastes, such as sugar foam, fly ashes and a material originated from the zeolitization of fly ash. Soil + material mixtures were prepared at 10% doses. Changes in the acid neutralization capacity, crystalline phases and contaminant leaching over a wide range of pHs were examined by using pH(stat) leaching tests. Sugar foam, the zeolitic material and MX-80 bentonite produced the greatest decrease in the leaching of pollutants due to an increase in the pH and/or the sorption capacity in the resulting mixture. This finding suggests that soil remediation may be a feasible option for the reuse of non-hazardous wastes.
研究了添加物质对两种污染土壤中砷和金属（铜、锌、镍、铅和镉）浸出模式的影响。所研究的物质包括膨润土、硅酸盐和工业废物，如糖沫、粉煤灰和一种源自粉煤灰沸石化的物质。土壤+物质混合物按 10%的剂量制备。通过 pH 静态浸出试验研究了在宽 pH 范围内酸中和能力、晶相和污染物浸出的变化。由于 pH 值的升高和/或形成的混合物中吸附能力的增强，糖沫、沸石材料和 MX-80 膨润土对污染物浸出的抑制作用最大。这一发现表明，土壤修复可能是一种可行的选择，可用于再利用非危险废物。
