| 两种温度处理下铜绿微囊藻对Cr~(6+)的耐受与吸附特性研究 |
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| 作者单位： | ;1.河南工程学院资源与环境学院;2.信阳师范学院生命科学学院;3.中国科学院水生生物研究所 |
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| 摘 要： | 在20℃和30℃两个温度条件下研究了铜绿微囊藻(Microcystis aeruginosa)对Cr~(6+)的耐受性和吸附率.结果表明:随着Cr~(6+)质量浓度的增加,24h后其对铜绿微囊藻的生长速率及叶绿素a的生物合成抑制作用增强,而胞外多糖的生物合成显著地增加.30℃时胞外多糖的生物合成量显著高于20℃胞外多糖含量(P0.05).Cr~(6+)质量浓度增加至0.6mg/L时,铜绿微囊藻对Cr~(6+)吸附率最大,20℃和30℃时分别达到84.7%和98.3%.Cr~(6+)质量浓度为9.0mg/L时,单位藻生物量对Cr~(6+)的吸附量达到最大,20℃和30℃时最大吸附量分别为39.3g/g、58.6g/g.
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| 关 键 词： | 铜绿微囊藻 叶绿素 六价铬 吸附 吸附动力学 |
Study on the Endurance Effect and Sorption Characteristic of Microcystis aeruginosa on Cr~(6+) at Two Temperatures |
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| Institution: | ,Department of Resource and Environmental Engineering,Henan Institute of Engineering,College of Life Sciences,Xinyang Normal University,Key Laboratory of Algal Biology,Institute of Hydrobiology,Chinese Academy of Sciences |
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| Abstract: | The present study investigated the tolerance of Microcystis aeruginosa PCC7806(Ma 7806)to Cr~(6+)at 20 ℃ and 30 ℃,and measured the removal efficiency of Cr~(6+)by Ma 7806.The results showed that with increasing the concentration of Cr~(6+),the inhibition on the growth rate and chlorophyll a(Chl a)biosynthesis of Ma 7806 became stronger,but the biosynthesis of extracellular polysaccharide significantly increased.The biological synthesis content of extracellular polysaccharide at 30℃ was significantly more than that at 20℃(P <0.05).The removal efficiency of Cr~(6+)by Ma 7806 reached the maximum when the concentration of Cr~(6+)reached 0.6mg/L,namely 84.7% at 20 ℃,98.3% at 30 ℃,respectively.The adsorption capacity of Cr~(6+)by Ma 7806 reached the maximum when the concentration of Cr~(6+)reached 9.0 mg/L,and the maximum adsorption capacity were 39.3g/g at 20 ℃,58.6g/g at 30 ℃,respectively. |
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| Keywords: | Microcystis aeruginosa chlorophyll-a chrome(Ⅵ) sorption sorption kinetics |
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