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应用生态学报 ›› 1995, Vol. 6 ›› Issue (3): 323-328.

• 研究论文 • 上一篇    下一篇

汞对固定化斜生栅藻净化污水及其生理特征的影响

严国安, 李益健, 张忠新, 胡玉波, 王志坚   

  1. 武汉大学环境科学系, 武汉 430072
  • 收稿日期:1993-06-03 修回日期:1994-04-22 出版日期:1995-07-25 发布日期:1995-07-25
  • 基金资助:

    国家自然科学基金

Effect of mercury on sewage purification of immobilized Scenedesmus obliquus and its physiological characteristics

Yan Guoan, Li Yijian, Zhang Zhongxin, Hu Yubo, Wang Zhijian   

  1. Wuhan University, Wuhan 430072
  • Received:1993-06-03 Revised:1994-04-22 Online:1995-07-25 Published:1995-07-25

摘要: 研究了在不同Hg浓度条件下,固定化斜生栅藻对污水中氨氮、正磷酸盐和Hg的净化效率及其生理特征变化。结果表明,固定藻的净化效率和对Hg毒性的抗性明显高于悬浮藻。0.2mg·L-1Hg对固定藻的净化效率无影响,并对-P的吸收有刺激促进作用,而悬浮藻的开始下降;从0.8-1.4mg·L-1,随着Hg浓度的增加,固定藻对氨氮和正磷酸盐的净化效率逐渐下降,而悬浮藻的则急剧下降;固定藻对汞的去除随汞浓度的增加而增加。同时,固定藻的生长OD值、叶绿素含量、光合强度和过氧化物酶活性亦随汞浓度的增加而逐渐下降。

关键词: 汞, 净化污水, 固定化斜生栅藻, 生理特征, 多样性, 温带草原, 刈割, 功能群, 放牧制度, 大型土壤动物

Abstract: The NH4+-N,PO43--P and Hg2+ purification efficiency of immobilized Scenedesmus obliquus and its physiological charateristics are studied under different mercury concentrations.The results show that the purification efficiency of immoblilized algae and their resistance to Hg toxicity are much higher than those of suspended ones.Under the concentration of 0.2mg·L-1 Hg2+, there is no effect on purification efficiency of immobilized algae, but that of suspended one becomes decreasing.From 0.8 to 1.4mg·L-1 Hg2+, the NH4+-N and PO43--P purification efficiency of immoblilized algae is decreased with increasing Hg concentration, and that of suspended one is decreased sharply.The removal rate of Hg2+ by immoblilized algae is increased with increasing Hg2+ concentration, but their OD value for growth, chlorophyll a content, photosynthetic intensity and peroxidase activity are decreased.

Key words: Mercury, Sewage purification, Immobilized Scenedesmus deiquus, Physiological characteristics, soil macrofauna, grazing system, diversity, temperate grassland, functional group, mowing