环境工程学报2011，Vol.5Issue(5)：1008-1014,7.
活性炭固定沉积物中HCHs和DDTs的研究
Sequestration of HCHs and DDTs in contaminated sediment by activated carbon
摘要
Abstract
In-situ capping is an important technology for the remediation of contaminated sediment. The benefits of in-situ capping are the reduction of contaminant water-column concentrations and therefore reduced bioavailability to benthic and aquatic organisms, as well as the minimization of downstream migration. In this study, activated carbon was mixed in HCH- and DDT-contaminated sediment for 28 days, 60 days and 150 days.The effects of varying the activated carbon dose, particle size and contacting ways were tested in reducing the aqueous equilibrium HCHs and DDTs concentrations and in reducing the uptake by semi-permeable membrane devices (SPMD). Sediment treated with 7.6％ activated carbon for 150 days showed 99.76％ and 97.68％ reductions in aqueous equilibrium HCHs and DDTs concentrations, 97.19％ and 100％ reductions in HCHs and DDTs uptake by SPMDs, respectively. Three different particle sizes of activated carbon were tested in the study. When 0. 075 ～0. 27 mm of activated carbon were mixed in sediment with a contact period of 28 days, the aqueous equilibrium HCHs and DDTs concentrations were reduced by 99.63％ and 96.33％ and the uptakes by SPMDs were reduced by 91.52％ and 98.76％, respectively. The effectiveness of activated carbon contacting sediment by continuously shaking is greater as compared to by setting after mixing. The results of the study demonstrated the potential usefulness of activated carbon amendment as an in-situ remedial technology for contaminated sediment.关键词
HCHs/DDTs/沉积物/活性炭/固定Key words
HCHs/ DDTs/ sediment/ activated carbon/ in situ sequestration分类
资源环境引用本文复制引用
韩丹,张清,刘希涛,张桂香..活性炭固定沉积物中HCHs和DDTs的研究[J].环境工程学报,2011,5(5):1008-1014,7.基金项目
国家"973"重点基础研究发展规划项目(2007CB407302) （2007CB407302）
国家自然科学基金资助项目(20977011,110450002) （20977011,110450002）
北京师范大学自主科研基金重点资助项目(2009SD-19) （2009SD-19）
