摘要(Abstract)：
为了修复被三氯乙烯污染的地下水,利用化学沉淀法制备纳米过氧化钙,采用柠檬酸钠强化Fe~(2+)催化效果,考察柠檬酸钠与Fe~(2+)的配比,以及纳米过氧化钙、柠檬酸钠-Fe~(2+)投加量等对修复效果的影响,并分析三氯乙烯的降解路径。结果表明:在中性条件下,柠檬酸钠-Fe~(2+)可以有效催化纳米过氧化钙降解地下水中的三氯乙烯;体系中纳米过氧化钙、柠檬酸钠-Fe~(2+)的浓度以及柠檬酸钠与Fe~(2+)的配比对三氯乙烯的降解有显著影响,降解反应符合伪一级动力学模型;在三氯乙烯浓度为0.16 mmol/L,柠檬酸钠与Fe~(2+)的物质的量比为1∶1,体系中纳米过氧化钙、柠檬酸钠-Fe~(2+)的浓度分别为2.88、 0.96 mmol/L时,反应3 h后三氯乙烯去除率可达98.0%。
关键词(KeyWords)： 地下水修复;纳米过氧化钙;柠檬酸钠;三氯乙烯
基金项目(Foundation): 国家自然科学基金项目(21777056)
作者(Author): 刘玉仙,张克刚,丁冠涛,王晓东,彭圣洁
DOI: 10.13349/j.cnki.jdxbn.20200529.001
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