土壤学报2012，Vol.49Issue(4)：688-697,10.
不同初始氧化还原条件下土壤中重金属的运移研究Ⅰ.单一Cd、Cu、Zn的土柱实验
THE TRANSPORT OF HEAVY METALS IN SOILS WITH DIFFERENT INITIAL REDOX POTENTIAL I.SINGLE Cd, Cu, Zn IN THE SOIL COLUMN EXPERIMENTS
摘要
Abstract
Heavy metal cadmium, copper and zinc were used to study single and the effect of five different redox potential for transport amounts through an outflow experiment using saturated soil column. The results indicate that oxidizing conditions in the soil, the sequence of the cadmium in the BTCs (Breakthrough Curves) was Eh =490 mV > 350 mV > 240 mV. Reducing conditions in the soil, the sequence of the cadmium in the BTCs was Eh =490 mV > 350 mV > 240 mV. In oxidizing conditions, high redox potential of soil can significantly promote the transport of copper. In reducing conditions, low redox potential of soil can inhibit the transport of copper, which has nothing to do with the reducing agent concentration. The BTCs peak value of zinc in the highly oxidized conditions were significantly higher than the lowly oxidation conditions; and the effect of different reduction conditions for transport of zinc is not obvious. The transport of three heavy metals ions cadmium, copper and zinc in the flow of liquid pH value decreased, then increased and final equilibrium , the flow of fluid oxidizing condition of the soil pH value is less than reducing conditions; and Eh value of just the opposite.关键词
重金属/氧化还原电位/吸附/运移/土壤Key words
Heavy metal/ Redox potential/ Adsorption/ Transport/ Soil分类
农业科技引用本文复制引用
于童,徐绍辉,林青..不同初始氧化还原条件下土壤中重金属的运移研究Ⅰ.单一Cd、Cu、Zn的土柱实验[J].土壤学报,2012,49(4):688-697,10.基金项目
国家自然科学基金项目(40771095)资助 （40771095）
