水资源与水工程学报2017，Vol.28Issue(6)：56-61,6.DOI:10.11705/j.issn.1672-643X.2017.06.10
生物表面活性剂对河道底泥重金属的淋洗效果比较
Comparison of biosurfactants for heavy metals washing from river sediment
摘要
Abstract
In order to investigate the effects of biosurfactant properties , concentration and time on the re-moval of heavy metals from river sediment, three different bio-active agents, tea saponin, saponin and so-phorolipid were selected for the study. Results indicate that washing efficiency varied among these biosur-factants. Critical micelle concentration ( CMC) of biosurfactant had a significant effect on washing effi-ciency. Biosurfactant with the lowest CMC, i. e. sophorolipid, manifested the highest washing efficiency. In addition, washing efficiency reached its optimum at a concentration of 8％. Study on washing time to leaching effect showed that Elovich equation describe well the kinetics of washing by tea saponin, sapo-nins and sophorolipid which means that heavy metal washing involved multi-phase diffusion. Forms of heavy metal before and after washing were also analyzed. Biosurfactant washing was effective in removing weakly-bound ( ion exchangeable and carbonated-bound ) heavy metal thus increased the proportion of strongly-bound ones and reduced the bioavailability of heavy metals.关键词
生物表面活性剂/茶皂素/皂角苷/槐糖脂/淋洗/重金属/河道底泥Key words
biosurfactant/tea saponin/saponin/sophorolipid/washing/heavy metals/river sediment分类
资源环境引用本文复制引用
陈再,陈维芳,何飞飞,曲妍..生物表面活性剂对河道底泥重金属的淋洗效果比较[J].水资源与水工程学报,2017,28(6):56-61,6.基金项目
上海市自然科学基金项目(14ZR1428900) （14ZR1428900）
上海市科委能力建设项目(13230502300) （13230502300）
教育部留学回国科研启动基金项目(SEM2013) （SEM2013）
