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铜、砷单一及复合污染对黑藻的毒性效应

薛培英 颜昌宙 曹英兰 魏群山

薛培英, 颜昌宙, 曹英兰, 魏群山. 铜、砷单一及复合污染对黑藻的毒性效应[J]. 环境科学研究, 2011, 24(9): 1052-1058.
引用本文: 薛培英, 颜昌宙, 曹英兰, 魏群山. 铜、砷单一及复合污染对黑藻的毒性效应[J]. 环境科学研究, 2011, 24(9): 1052-1058.
XUE Pei-ying, YAN Chang-zhou, CAO Ying-lan, WEI Qun-shan. Toxic Effects of Copper and Arsenic and Their Compound Pollution on Hydrilla verticillata (L.f.) Royle[J]. Research of Environmental Sciences, 2011, 24(9): 1052-1058.
Citation: XUE Pei-ying, YAN Chang-zhou, CAO Ying-lan, WEI Qun-shan. Toxic Effects of Copper and Arsenic and Their Compound Pollution on Hydrilla verticillata (L.f.) Royle[J]. Research of Environmental Sciences, 2011, 24(9): 1052-1058.

铜、砷单一及复合污染对黑藻的毒性效应

基金项目: 国家自然科学基金面上项目(20777059)

Toxic Effects of Copper and Arsenic and Their Compound Pollution on Hydrilla verticillata (L.f.) Royle

  • 摘要: 通过室内模拟试验,研究了铜(Cu)、五价砷〔As(Ⅴ)〕单一及复合污染对黑藻〔Hydrilla verticillata (L.f.) Royle〕生长、富集Cu和As的能力以及对超氧化物歧化酶(SOD)活性的影响.毒性测试结果表明,Cu和As(Ⅴ)对黑藻的4 d-EC50分别为2和12 μmol/L,单一Cu对黑藻的毒性远高于As(Ⅴ). 复合污染试验结果表明,对于5 μmol/L As(Ⅴ)处理组,低浓度Cu〔c(Cu)<2 μmol/L〕的加入,促进了植物生长,降低了植物体内的As总量〔w(As)〕,同时降低了植物体中占主要部分的三价砷的含量(w〔As(Ⅲ)〕). 对于Cu处理组,As(Ⅴ)的加入同样抑制了黑藻对Cu的富集,SOD活性也高于单一Cu处理,可见在低浓度Cu处理下,Cu和As(Ⅴ)之间存在拮抗作用;而高浓度Cu〔c(Cu)≥2 μmol/L〕的加入,虽然植物对Cu和As(Ⅴ)的富集与单一Cu和As(Ⅴ)处理相比均显著降低,但植物生长受到抑制,SOD活性与单一处理相比也显著降低(P<0.05),因此高浓度Cu处理下,二者对黑藻毒性起协同作用. 总之,黑藻具有应用于处理低浓度Cu和As(Ⅴ)单一及复合污染水体的潜力.

     

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出版历程
  • 收稿日期:  2011-02-12
  • 修回日期:  2011-03-06
  • 刊出日期:  2011-09-25

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