生物强化还原脱氯材料模拟修复氯代烃污染含水层介质的初步研究

摘要：有机氯溶剂作为一种常见的工业清洗剂已经被大范围使用，随之而来的泄漏、遗弃等行为导致了环境中存在大量此类污染物。尤其在有机氯溶剂进入地下环境中后，容易发生迁移扩散，导致更大范围且长时间的、持续的污染，其中对地下含水层介质的污染最为严重。原位生物修复技术是目前较有发展前景的有机氯溶剂污染地下水绿色修复方法，但苛刻的污染环境限制了厌氧微生物的自然降解能力。本研究为了最大限度地发挥厌氧菌的作用，提高有机氯降解的效果，参照前人研究成果后，决定制备一种复合修复材料以强化氯代烃的生物还原脱氯过程。在实验过程中详细讨论了不同包埋条件及不同成分比列下制得的复合材料的脱氯效果得出最佳微胶囊的成分及各组分比例数据。62243

毕业论文关键词：氯代烃；零价铁；原位生物修复；微胶囊

Simulation and remediation of chlorinated hydrocarbon contaminated aquifer media by simulated biological enhanced reductive desorption

Abstract: As a kind of common industrial cleaning agent, organic chlorine solvent has been used in large scale, and the following behavior caused by leakage and abandonment is a large amount of such pollutants in the environment. Especially in the organic chlorine solvent into the underground environment, it is easy to migrate and spread, resulting in a larger range and long time, continuous pollution, which is the most serious pollution of the underground aquifer. In situ bioremediation is a promising method for the green remediation of organic chlorine solvent contaminated groundwater, but the harsh environmental conditions of the natural degradation of anaerobic microorganisms. In this study, in order to maximize the play the role of anaerobic bacteria, improve the effect of degradation of organic chloride, referring to the results of previous studies, decided to preparation of a composite restorative materials to strengthen the chlorinated hydrocarbons biological reductive dechlorination process. In the experimental process were discussed in detail different embedding conditions and different composition ratio of composite of dechlorination effect that best microcapsule composition and different proportion of the data.

KeyWords: chlorinated hydrocarbons; zero valence iron; in situ bioremediation; micro capsules

1绪论 1

1.1 研究背景 1

1.2 地下水有机氯溶剂污染现状 2

1.3地下水有机氯溶剂污染修复技术概述 4

1.3.1 异位修复技术 4

1.3.2 原位修复技术 5

2 生物强化还原脱氯材料 7

2.1有机氯溶剂厌氧生物降解机制 7

2.1.1还原脱氯作用 7

2.1.2 氧化脱氯作用 8

2.2 强化厌氧生物修复材料研究进展 9

2.2.1零价铁 9

2.2.2有机物 10

2.2.3生物炭 11

2.2.4复合材料 12

2.3 微胶囊包埋技术 13

2.3.1 微胶囊的制备方法 14

2.3.2 微胶囊包埋技术在地下水处理中的应用及优势 16

3 实验材料及内容 17

3.1 实验试剂及仪器生物强化还原脱氯材料模拟修复氯代烃污染含水层介质的初步研究:http://www.751com.cn/huaxue/lunwen_68393.html