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牛血清白蛋白对Cu2+与δ-MnO2间吸附平衡性质的影响

张丽娜1;马子川1,2;刘敬泽2   

  1. 1河北师范大学化学与材料科学学院, 石家庄 050016;2河北师范大学生命科学学院, 石家庄 050016
  • 收稿日期:2007-06-18 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Influence of bovine serum albumin on the adsorption equilibrium between Cu2+ and δ-MnO2

ZHANG Li-na1;MA Zi-chuan1,2; LIU Jing-ze2   

  1. 1College of Chemistry and Material Sciences, Hebei Normal University, S
    hijiazhuang 050016, China;2College of Life Sciences, Hebei Normal
    University, Shijiazhuang 050016, China
  • Received:2007-06-18 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 研究了溶液中牛血清白蛋白(BSA)的存在对Cu2+与δ-MnO2间吸附平衡性质的影响,旨在增进人们对Cu2+环境化学行为的认识。结果表明:BSA存在下,Cu2+在δ-MnO2表面的吸附率pH曲线呈典型的“S”形,加入BSA使Cu2+的吸附突跃向高pH方向移动,影响程度与BSA的加入方式有关,其次序为Ⅳ(先加BSA后加Cu2+)>Ⅲ(Cu2+和BSA同时加)≈Ⅱ((先加Cu2+后加BSA);BSA存在下,Cu2+的等温吸附线遵循Langmuir等温吸附方程,Cu2+的饱和吸附量随BSA浓度的增大而减小,并随BSA的加入方式而改变,其次序为I(不加BSA)>Ⅱ≈Ⅲ>Ⅳ;Cu2+在δ-MnO2上的饱和吸附量随温度的升高而增大。在pH=3.0条件下,Cu2+在δ-MnO2上的吸附是完全可逆的,但pH=5.0的条件下,吸附是不可逆的,BSA对Cu2+的吸附可逆性没有影响。

关键词: 蓟马, 韭蛆, 防治, 辛硫磷, 甲基对硫磷, 生物降解, 降解菌剂

Abstract: This paper studied the adsorption equilibrium between Cu2+ and δ-MnO2 in solution in the presence of bovine serum albumin (BSA) to be beneficial to understand the environmental chemical behavior of Cu2+. The results showed that in the presence of BSA, the change pattern of Cu2+ adsorption onto δ-MnO2 with pH was a typical Sshape curve. BSA made the adsorption leap of Cu2+ moved to high pH range, and the degree was related to the adding order of BSA, i.e., Ⅳ (BSA added first)> Ⅲ (Cu2+ and BSA added simultaneously)≈Ⅱ (Cu2+ added first). The Cu2+ adsorption in the presence of BSA was fitted Langmuir adsorption isotherm, and the saturated Cu2+ adsorption quantity decreased with increasing BSA concentration and changed with the adding order of BSA, i.e., I (without BSA)>Ⅱ≈Ⅲ>Ⅳ. In addition, the maximum capacity of Cu2+ onto δ-MnO2 increased with increasing temperature. The adsorption of Cu2+ onto δ-MnO2 was reversible at pH 3.0 but irreversible at pH 5.0. BSA had no influence on the reversibility of Cu2+ adsorption onto δ-MnO2.

Key words: Bradysia odoriphaga, Taeniothrips alliorum, Pest control, Phoxin, Methyl parathion, Bio-degradation, Pesticide-degrading bacterium