江汉大学学报(自然科学版) ›› 2016, Vol. 44 ›› Issue (3): 257-264.doi: 10.16389/j.cnki.cn42-1737/n.2016.03.012

• 水污染治理 • 上一篇    下一篇

3种挺水植物对水体中Cu2+富集能力的研究

黄燚1,钟成华*1,2,冯换影2,彭静博2,王法理2   

  1. 1. 重庆大学 城市建设与环境工程学院,重庆 400045;2. 重庆工商大学 环境与资源学院,重庆 400047
  • 出版日期:2016-06-28 发布日期:2016-07-21
  • 通讯作者: 钟成华
  • 作者简介:黄燚(1990—),男,硕士生,研究方向:水体生态修复。
  • 基金资助:
    重庆市科学与技术发展委员会项目(CSTC2010AA0020)

Accumulation Capability of Cu 2+ in Three Emergent Aquatic Plants

HUANG Yi1,ZHONG Chenghua*1,2,FENG Huanying2,PENG Jingbo2,WANG Fali   

  1. 1. Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400045,China;2. College of Environment and Resources,Chongqing Technology and Business University,Chongqing 400047,China
  • Online:2016-06-28 Published:2016-07-21
  • Contact: ZHONG Chenghua

摘要: 选取美人蕉、风车草和羽毛草3种挺水植物作为试验植物,模拟研究了3种植物对Cu2+的耐受性以及不同pH条件对植物生长和植物对Cu2+的富集情况。试验结果表明,3种挺水植物对Cu2+浓度为2、4和6 mg/L均有较强的耐受能力。经过21 d试验后,3种植物对Cu2+浓度为6 mg/L的富集量最大,其中,美人蕉对Cu2+的富集量为208.562 mg/kg,风车草为332.453 mg/kg,羽毛草为201.373 mg/kg。美人蕉和羽毛草在pH为5的水体中对Cu2+的富集量最大(234.636 mg/kg 和 168.957 mg/kg),而风车草在pH为7的水体中最大(246.652 mg/kg)。美人蕉和风车草植物根部对Cu2+的富集能力远强于茎叶部,风车草比美人蕉的转移系数大,因而比美人蕉有利于Cu2+的回收。

关键词: 挺水植物, Cu2+, 富集量, 转移系数

Abstract: With Canna indica ,Cyperus alternifolius and Brazilian milfoil as the test plants ,to simulate and study the tolerance of plants to Cu2+,different pH conditions on plant growth and enrichments of Cu2+. The results showed that three kinds of emergent plants have a strong tolerance for Cu2+ concentrations of 2、4 、6 mg/L. After 21 days test ,the Cu2+ enrichments of three kinds of plants were maximum in 6mg/L ,respectively were 208. 562 mg/kg (Canna indica),332. 453 mg/kg (Cyperus alternifolius) and 201. 373 mg/kg(Brazilian milfoil). The Cu2+ enrichments of Canna indica and Brazilian milfoil were maximum in water with pH = 5(234. 636 mg/kg and 168. 957 mg/kg),while Cyperus alternifolius was maximum at pH = 7(246. 652mg/kg),and the roots of Canna indica and Cyperus alternifolius on Cu2+ accumulation were far stronger than the stems and leaves,the transfer coefficient of Cyperus alternifolius was higher than Canna indica,thus Cyperus alternifolius is propitious to recover Cu2+.

Key words: emergent aquatic plant, Cu2+, enrichment capacity, transfer coefficient

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