城市污泥用于铅锌矿区重金属污染修复的试验研究

选取黔西北矿渣为研究对象,研究了城市污泥改良矿区重金属污染的可行性和存在的问题,同时在借鉴前人利用污泥的经验基础之上,通过盆栽试验,探讨了纯污泥和不同配比的粉煤灰钝化污泥对铅锌冶炼废渣中重金属有效性的影响,以及不同处理的栽培基质对玉米的生长发育、营养状况和植株中重金属累积的影响,并分析了粉煤灰钝化污泥在矿山土地复垦中的应用前景,以为粉煤灰和污泥的土地利用提供一定的依据,达到既能充分利用这些固体废弃物资源又不污染环境的目的。

Research on the Remediation with Sewage Sludge for the Heavy Metal Contamination in Pb-Zn Mining Areas

Based on the investigation of Pb/Zn smelting slag in northwestern Guizhou Province,this paper explores the feasibility and existing problems of heavy metal pollution control by sewage sludge.The pot experiments are performed to identify the remediation effects of sewage sludge amended with coal ash at different ratios on Pb/Zn smelting slag,and the effects of different treatments on the growth and alimentation condition of the plant and on its accumulation of heavy metals.The paper also discusses the foreground of the restoration of mining wastelands by sewage sludge amended with coal ash,and provides a gist for the land use of sewage sludge and coal ash so as to attain the purpose of reusing these solid wastes without polluting the environment.