Crimi Michelle L, Siegrist Robert L
Environmental Science and Engineering Division, Colorado School of Mines, 1500 Illnois street, Golden, CO 80401, USA.
Water Res. 2004 Feb;38(4):887-94. doi: 10.1016/j.watres.2003.09.029.
Particle filtration and cadmium sorption studies were performed at selected time points during reaction of potassium permanganate with trichloroethylene under varied reaction matrix conditions. The purpose of the studies was to determine the potential impact of manganese oxides particle generation, a by-product of the permanganate reaction, on subsurface metal mobility, with cadmium serving as a representative metal of interest in the environment. Results of the studies indicate that the association of cadmium with the manganese oxides is a function of (1) particle concentration, (2) pH, (3) the presence of calcium in the reaction matrix, and (4) the rate of particle generation and agglomeration. Based on these findings, it is important to give careful consideration to subsurface conditions that can potentially impact the mobility of metals present naturally or as co-contaminants. If subsurface conditions are not appropriately characterized and planned for, deleterious effects could result, including long-term release of metals initially sorbed onto generated particles. Alternatively, the generated manganese oxides may serve as a long-term means of immobilizing metals within the subsurface.
在高锰酸钾与三氯乙烯反应的不同反应基质条件下，于选定时间点进行了颗粒过滤和镉吸附研究。这些研究的目的是确定作为高锰酸盐反应副产物的锰氧化物颗粒生成对地下金属迁移率的潜在影响，镉作为环境中一种具有代表性的目标金属。研究结果表明，镉与锰氧化物的结合是以下因素的函数：（1）颗粒浓度；（2）pH值；（3）反应基质中钙的存在；（4）颗粒生成和团聚速率。基于这些发现，必须认真考虑可能影响天然存在或作为共污染物的金属迁移率的地下条件。如果地下条件没有得到适当表征和规划，可能会产生有害影响，包括最初吸附在生成颗粒上的金属的长期释放。或者，生成的锰氧化物可能成为将金属固定在地下的一种长期手段。
