安徽农业科学2011，Vol.39Issue(5)：2689-2691,2695,4.
螯合剂调控下短毛蓼对锰污染土壤的修复潜力
Potential of Using Polygonum pubescens Blume for Remediation of Manganese Contaminated Soils with Assistance from Chelating Agents
摘要
Abstract
With pot experiment, the effect of removing manganese in soil by planting the hyperaccumulator Polygonum pubescens Blume is studied in this paper, through adding chelating agents of different mass molar concentrations such as ascorbic acid, tartaric acid and EDTA to the soil from manganese ore tailings area and restoration area and the simulation area for research of manganese pollution. Results show that for different soil types, the accumulation effect of P. pubescens to manganese show great diversity, which can be significantly improved in manganese ore tailings area and restoration area by adding chelating agents to the soil, while in simulation area it is restrained. Compared with ascor bic acid and tartaric acid, EDTA has a better effect on P. pubescens's cumulation for manganese. Whenthe concentration of EDTA reaches 10mmol/kg, the accumulation capacity of P. pubescens's shoot gets the maximum value. The cumulation capacity of plants to heavy metal has a close connection with the phytomass. To a certain degree, chelating agents are poisonous to plant, high concentration of which will seriously affect plant yield. Overground parts of plant will decline more than 50％ when EDTA concentration amounts to 10 mmol/kg. Generally speaking, P. pubescens's cumulation effect for manganese differs by adding different chelating agents of different concentration. In regard of remediation potential and latent environmental risk, EDTA is the best chelating agent for the restoration of manganese ore tailings by planting P. pubescens and the removal efficiency of manganese is optimum when the concentration of EDTA is 5 mmol/kg.关键词
螯合剂/锰/超富集植物/盆栽/酸性土壤/锰尾矿Key words
Chelating agents/ Manganese/ Hyperaccumulator/ Pot experiment/ Acid soil/ Manganese ore tailings分类
资源环境引用本文复制引用
许丹丹,李金城,邓华,徐芝芬,郑华燕,孙鑫..螯合剂调控下短毛蓼对锰污染土壤的修复潜力[J].安徽农业科学,2011,39(5):2689-2691,2695,4.基金项目
广西高校人才小高地建设"环境工程"创新团队资助计划项目(桂教人[2007]71号) （桂教人[2007]71号）
国家自然科学基金资助项目(30560032). （30560032）
