• 关键词：凤眼莲  甲基对硫磷  植物修复

• 基金项目：国家自然科学基金资助项目(39970432)

• 夏会龙
• 浙江大学环境与资源科学学院, 杭州 310029

• 吴良欢
• 浙江大学环境与资源科学学院, 杭州 310029

• 陶勤南
• 浙江大学环境与资源科学学院, 杭州 310029

• 摘要：报道了凤眼莲(EichhorniacrassipesSolms)净化水溶液中甲基对硫磷的作用及修复甲基对硫磷污染水体的主要机理。研究结果表明, 与空白抑菌水溶液相比, 10—11g凤眼莲抑菌可将250mL的10mg/L的甲基对硫磷降解速度提高76.3-52%。处理10d后甲基对硫磷的消除率, 凤眼莲培养液为99.9%, 对照水溶液为40.1%。其修复机理主要是凤眼莲的直接吸收和微生物降解。在不抑菌条件下, 凤眼莲对水溶液中甲基对硫磷净化的贡献率达67.28%, 微生物降解约占23.97%.

• Abstract：The purification efficiency and mechanism of methyl parathion by water hyacinth (Eichhornia crassipes Solms) were studied. The results showed that the degradation rate constant of methyl parathion 10mg/L in 250mL water solution was enhanced by 7.6 fold with 10—11g fresh weight of water hyacinth compared to the unplanted water solution in a sterile condition The degradation rate of methyl parathion was 99 9% in water solution planted with water hyacinth, and it was 40 1% in unplanted water solution after 10 days. As plant uptake took up 67.28% and microorganism did about 23.97% to the total degradation of methyl parathion, uptake by water hyacinth and degradation by microorganism might be the main phytoremediation processes.

• Key words：water hyacinth  phytoremediation  methyl parathion

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