环境矿物材料对巢湖水体及底泥中重金属固定效果的研究
关键词：凹凸棒 海泡石 吸附 重金属 电感偶合等离子体质谱
毕业设计说明书（毕业论文）外文摘要
Title Environmental mineral materials on chaohu lake water body and fixed effect of heavy metals in sediment research
Abstract
There are lots of methods to process the heavy metals in the waste water, while adsorption is an effective one in them. Researching the adsorption principles of adsorbent and then choosing it by the characteristics of heavy metals could process the heavy metal ions efficiently and economically. Modified attapulgite and sepiolite, which have great application prospect in the treatment of waste water with heavy metal ions, have good adsorption performance because of their special structures. The results show that modified attapulgite and sepiolite have good adsorption performance to As5+, Pb2+ and Cr3+.The best modified temperature of attapulgite is 700℃ while the best modified temperature of sepiolite is 800℃.Finally, the physical and chemical properties of the materials before and after modification were characterized, so as to analyze the mechanism of adsorption. Attapulgite and sepiolite were used to do the adsorption experiments in this article.
Keywords attapulgite sepiolite adsorption heavy metals ICP-MS
目录
1 绪论 1
1.1背景 1
1.1.1 重金属污水的主要来源 1
1.1.2 重金属废水的危害 2
1.1.3 重金属废水的常用处理方法 3
1.2研究现状 4
1.2.2 水体重金属污染物的生物学效应研究 5
1.2.3水体重金属污染物污染指示研究 5
1.3前景 6
2 实验 6
2.1实验材料与仪器 6
2.1.1实验选用的材料 6
2.1.2 实验仪器 8
2.2实验方法 9
2.2.1 海泡石吸附As5+实验 9
2.2.2 凹凸棒吸附As5+实验 10
2.2.3 海泡石吸附Cd2+和Pb2+实验 11
2.2.4 凹凸棒吸附Cd2+和Pb2+实验 14
3讨论与分析 16
3.1 凹凸棒结论分析 16
3.1.1 热处理凹凸棒的结构变化 16
3.1.2 热处理凹凸棒石的形貌变化 16
3.2 海泡石结论分析 17
3.3 建议 19
结论 20
致谢 21
参考文献 22
1 绪论
水资源是人类生存的最重要自然资源，同时是地球生态循环的介质，还是人类生态环境的主要组成部分。随着工业化的高速发展，最主要是采矿，冶炼，化工，电镀，电子等行业的高速发展，以及固体废弃物不经处理就填埋和堆放，城市生活中的废水和农业废水到处乱排，这些因素都导致了水体中重金属的大量累积[1]。
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