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OALib Journal期刊
ISSN: 2333-9721
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ddt污染土壤的修复技术
DOI: 10.3969/j.issn.1671-7627.2011.02.021, PP. 94-98
Keywords: ddt,修复,土壤
Abstract:
采用超声微波协同技术对实际双对氯苯基三氯乙烷（ddt）污染土壤进行修复，考察水相介质、碱浓度、水投加量、微波电功率、反应时间对ddt去除效果的影响。结果表明：这种修复技术可以有效地去除污染土壤中的2,2双(4氯苯基)1,1,1三氯乙烷（p,p′ddt）和二氯二苯二氯代甲烷（p,p′ddd），降低土壤的毒性。碱性介质的投加更有利于ddt污染土壤毒性的降低，对于20g污染土壤，最佳碱浓度为6mol/l；最佳水投加量为4ml；电功率的提高，不仅可以提高p,p′ddt、p,p′ddd的去除效果，还可以去除p,p′ddt、p,p′ddd在降解过程中生成的2,2双(4氯苯基)1,1,1二氯乙烯（p,p′dde）；最优反应时间为4min。
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