摘要
以水浮莲(Pistia stratiotesL.)为试验材料,采用水培方法,对在不同Cu2+质量浓度和不同pH值条件下,水浮莲对Cu2+的吸收和积累特性以及Cu2+质量浓度、pH值对水浮莲吸收Cu2+的影响进行了研究.结果表明,水浮莲对低铜污染水体有良好的修复效果,在Cu2+质量浓度为2.00、4.00、6.00和8.00 mg/L时水浮莲对铜的总去除率分别为88.50%、90%、50%、78.00%和74.63%;在Cu2+质量浓度为4 mg/L、pH值为5.0、6.0、7.0时,水浮莲对铜的总去除率分别为76.50%,87.25%和83.00%.水浮莲对铜的修复主要依靠根的吸收和累积,其根部对Cu2+的积累量远高于茎叶部分的积累量.
The experiments were carried out by using Pistia stratiotes L. as investigation material. Using hydroponics culture, and setting different copper （Cu^2＋ ） concentrations and pH values, the absorption and accumulation of Cu^2＋ by P. stratiotes and the effects of Cu^2＋ concentration and pH value on the absorption of Cu^2＋ by P. stratiotes were studied. The results showed that P. stratiotes was good at remediating the water contaminated by low concentration of Cu^2＋ . When the Cu^2＋ concentration was 2.00 mg/L, 4.00 mg/L, 6.00 mg/L and 8. 00 mg/L, the total removal rate of Cu^2＋ by P. stratiotes was 88. 50%, 90. 50%, 78.00% and 74.63%, respectively. When pH value was 5.0, 6. 0, 7.0 with the Cu^2＋ concentration of 4.00 mg/L, the total removal rate of Cu^2＋ was 76.50%, 87.25%, and 83.00%, respectively. The remediation of Cu^2＋ by P. statiotes mainly depended on the absorption and accumulation of its roots. And the accumulating amounts of Cu^2＋ by roots were much higher than its stems and leaves.
出处
《仲恺农业技术学院学报》
2008年第1期29-33,共5页
Journal of Zhongkai Agrotechnical College
基金
仲恺农业技术学院科研启动基金(G2360239)
湖北省科技攻关(2006AA201C60)资助项目
