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

Abstract

Abstract: The NH₄⁺-N,PO₄^3--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 PO₄^3--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

Yan Guoan, Li Yijian, Zhang Zhongxin, Hu Yubo, Wang Zhijian . Effect of mercury on sewage purification of immobilized Scenedesmus obliquus and its physiological characteristics[J]. Chinese Journal of Applied Ecology, 1995, 6(3): 323-328.

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

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