农业环境科学学报2011，Vol.30Issue(12)：2548-2553,6.
蛋白核小球藻对铅、镉和汞吸附速率及其影响因素的研究
Biosorption Rate and Influence Factors of Pb2+, Cd2+ and Hg2+ by Chlorella pyrenoidosa
摘要
Abstract
At present, heavy metals contamination has become a worldwide focus on concerning for the levels of pollution and its obvious impact on human health. In this paper, the biosorption of Pb2+, Cd2+ and Hg2+ by Chlorella pyrenoidosa in seawater under different adsorption time, the cell density of algal and the concentrations of heavy metals were investigated, and the adsorption isotherm model was established to provide basic data for the biological treatment of heavy metal wastewater by algae. The results showed as follows: the adsorption rate of Pb2+、 Cd2+ and Hg2+ by C. Pyrenoidosa increased rapidly in 2~4 days and then tended to balance, the amount of heavy metals adsorption reached the maximum at the first day and then decreased gradually. The amount of heavy metals adsorption reached the maximum at the algal cell density of 1×106 cell·Ml-1, the adsorption rate tended to balance at the algal cell density of 4×106 cell·Ml-1. With the concentrations of Pb2+、Cd2+ and Hg2+ increasing, the adsorption rate showed a trend of gradually descent while the amount of heavy metals adsorption increased. The adsorption pattern of Pb2+ by C. Pyrenoidosa was more in accordance with Freundlich isotherm equation, and the adsorption patterns of Cd2+ and Hg2+ were more in accordance with Dubimim-Radushkevich isotherm equation. The maximum amount of adsorption of Pb2+、Cd2+ and Hg2+ were 4.84 mg·L-1, 37.7 mg·L-1, 5.61 μg·L-1, respectively, and the order of adsorption capacity was Cd2+＞Pb2+＞Hg2+.关键词
Pb2+/Cd2+/Hg2+/蛋白核小球藻/吸附Key words
Pb2+/ Cd2+/ Hg2+/ Chlorella pyrenoidosa/ biosorption分类
资源环境引用本文复制引用
田丹,赵文,魏杰,王媛,张鹏..蛋白核小球藻对铅、镉和汞吸附速率及其影响因素的研究[J].农业环境科学学报,2011,30(12):2548-2553,6.基金项目
国家自然科学基金(40776065) （40776065）
