Pb、Zn、Cd复合重金属污染土壤的修复与处理研究

发布时间：2018-04-11 23:14

本文选题：重金属 + 污染土　；参考：《中原工学院》2017年硕士论文

【摘要】：近年来,重金属污染土壤修复治理成为固废处理中热门研究课题,土壤固化稳定剂的研发一直为重金属污染土壤处理前沿领域。有必要针对一类重金属污染土壤研制一种可靠有效的土壤固化稳定药剂。研究课题依托固废资源化利用与节能建材国家重点试验室(北京建筑材料科学研究总院有限公司)开放课题《重金属污染土壤物化特性和固化机理研究及其应用》,国家863计划项目《有色冶金企业场地高风险污染土壤的固化稳定化工艺技术研究与示范》(2013AA06A206)等课题。采用工业废渣、矿物材料、含磷材料、含硫材料作为原材料,针对甘肃白银东大沟污染土土壤,采用水溶液环境条件下,通过单因素试验、正交试验筛选固化剂,结合实际污染土壤固化检测分析,利用SEM、X射线衍射、酸雨模拟、BCR连续提取试验等试验方法对土壤固化后进行分析。对固化剂与土壤中重金属离子的相互作用的机理进行探讨和研究,并对固化剂固化耐久性和生物活性进行了检测。通过研究取得以下成果:(1)针对甘肃白银东大沟污染土研制出污染土壤固化稳定剂C、W。并确定最优固化方案,固化剂C最优配比为C5,最优含水量为30%;固化剂W最优配比为W6,最优含水量为25%。(2)建立土壤固化稳定剂与重金属离子固化机理模型。(3)酸雨模拟条件下污染土壤固化剂对污染土中Pb、Zn、Cd的固化效果均比较好,且该固化剂对于改善污染土壤活性有一定促进作用。
[Abstract]:In recent years, remediation and treatment of heavy metal contaminated soil has become a hot research topic in solid waste treatment, and the research and development of soil solidification stabilizer has always been the frontier field of heavy metal contaminated soil treatment.It is necessary to develop a reliable and effective soil solidification and stabilization agent for a class of heavy metal contaminated soils.Research on the State key Laboratory of solid waste Utilization and Energy-saving Building Materials (Beijing General Research Institute of Building Materials) Open Project < Research on Physicochemical characteristics and curing Mechanism of heavy Metal contaminated soil and its ApplicationResearch and demonstration of solidification and stabilization technology of high risk contaminated soil in the site of non-ferrous metallurgical enterprise, No. 2013AA06A206).Industrial waste residue, mineral material, phosphorous material and sulfur-containing material were used as raw materials. In view of the contaminated soil of Baiyin Dongdagou in Gansu Province, the curing agent was screened by single factor test and orthogonal test under the condition of aqueous solution.Based on the analysis of the solidification of contaminated soil, the methods of SEMX ray diffraction and acid rain simulation BCR continuous extraction were used to analyze the solidified soil.The mechanism of the interaction between curing agent and heavy metal ions in soil was studied and the curing durability and biological activity of curing agent were tested.In this paper, the following results were obtained: (1) the solidified stabilizer Che W was developed for the polluted soil of Baiyin Dongdagou in Gansu Province.And determine the optimal curing scheme,The optimum ratio of curing agent C is C 5, the optimum water content is 30%, the optimum proportion of curing agent W is W 6, and the optimum water content is 25%.) the model of curing stabilizer and heavy metal ion solidification mechanism is established under the condition of acid rain) the curing agent of contaminated soil is simulated under the condition of acid rain.The solidification effect of Pb ~ (2 +) Zn ~ (2 +) CD in polluted soil is better.And the curing agent can improve the activity of contaminated soil to some extent.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X53

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