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    花岗岩母质红壤吸附水中砷(Ⅴ)的影响因素试验

    谌宏伟 柳林 彭向训 罗金明

    谌宏伟, 柳林, 彭向训, 罗金明, 2012. 花岗岩母质红壤吸附水中砷(Ⅴ)的影响因素试验. 地球科学, 37(2): 345-349. doi: 10.3799/dqkx.2012.040
    引用本文: 谌宏伟, 柳林, 彭向训, 罗金明, 2012. 花岗岩母质红壤吸附水中砷(Ⅴ)的影响因素试验. 地球科学, 37(2): 345-349. doi: 10.3799/dqkx.2012.040
    CHEN Hong-wei, LIU Lin, PENG Xiang-xun, LUO Jin-ming, 2012. Experiments of Factors Influencing Adsorption of As (V) in Water by Granite Red Soil. Earth Science, 37(2): 345-349. doi: 10.3799/dqkx.2012.040
    Citation: CHEN Hong-wei, LIU Lin, PENG Xiang-xun, LUO Jin-ming, 2012. Experiments of Factors Influencing Adsorption of As (V) in Water by Granite Red Soil. Earth Science, 37(2): 345-349. doi: 10.3799/dqkx.2012.040

    花岗岩母质红壤吸附水中砷(Ⅴ)的影响因素试验

    doi: 10.3799/dqkx.2012.040
    基金项目: 

    湖南省科技计划项目 2008sj3212

    详细信息
      作者简介:

      谌宏伟(1969-), 男, 副教授, 主要从事土壤和地下水污染防治与控制的研究.E-mail: chw1208_003@163.com

    • 中图分类号: X53

    Experiments of Factors Influencing Adsorption of As (V) in Water by Granite Red Soil

    • 摘要: 为探讨花岗岩母质红壤吸附水中砷(Ⅴ)的效果和机理, 采用静态吸附实验, 研究溶液砷初始浓度、反应时间、温度、pH值等因素对红壤吸附水中砷的影响.当溶液砷初始浓度小于5.0 mg/L时, 红壤对砷的去除率均大于97%;随着砷初始浓度增大, 去除率逐渐降低; 反应初期(0~120 min), 红壤对砷的去除率迅速增大至95.0%左右.此后, 去除率缓慢增大, 直到720 min后, 去除率达到97.0%左右, 并趋于稳定; 在砷初始浓度一定时, 红壤对砷的吸附量随着温度的升高逐渐增加, 但增加幅度较小; 红壤对砷的去除率随着体系pH值的增大呈减小趋势; 正交试验表明, 在砷初始浓度为5.0 mg·L-1、反应时间为120 min、pH为5.0及反应温度为40℃的组合下, 红壤对砷的去除率最大.

       

    • 图  1  溶液砷初始浓度对吸附作用的影响

      Fig.  1.  Affect of the As initial concentration on the adsorption

      图  2  红壤对砷的去除效果与反应时间的关系

      Fig.  2.  Relationship between the removal rate and the reaction time

      图  3  反应温度对吸附作用的影响

      Fig.  3.  Affect of the reaction temperature on the adsorption

      图  4  体系pH值对吸附作用的影响

      Fig.  4.  Affect of the pH value of the system on the adsorption

      表  1  红壤矿物组成及理化性质

      Table  1.   Minerals and physicochemical property of the red soil

      项目 有机质(g/kg) 石英(g/kg) 蒙脱石(g/kg) 伊利石(g/kg) 高岭石(g/kg) 赤铁矿(g/kg) 褐铁矿(g/kg) PZC pH
      检测值 16.30 476.00 102.50 121.60 144.70 - 108.60 8.9 5.94
      下载: 导出CSV

      表  2  4因素正交实验结果

      Table  2.   The orthogonal test of four affecting factors

      实验编号 A(mg·L-1) B(min) C D(℃) 去除率(%)
      1 1(5) 1(30) 4(8) 3(30) 92.49
      2 1 2(60) 1(5) 1(10) 92.57
      3 1 3(120) 3(7) 4(40) 90.45
      4 1 4(180) 2(6) 2(20) 95.42
      5 2(10) 1 3 2 89.72
      6 2 2 2 4 96.81
      7 2 3 4 1 83.79
      8 2 4 1 3 97.61
      9 3(15) 1 1 4 95.34
      10 3 2 4 2 87.53
      11 3 3 2 3 90.34
      12 3 4 3 1 83.16
      13 4(20) 1 2 1 89.34
      14 4 2 3 3 85.96
      15 4 3 1 4 94.82
      16 4 4 4 2 82.34
      $\overline {{\mathit{K}_1}} $ 92.31 80.37 92.42 83.16 -
      $\overline {{\mathit{K}_2}} $ 90.36 90.62 91.39 88.42 -
      $\overline {{\mathit{K}_3}} $ 86.71 91.89 87.36 90.49 -
      $\overline {{\mathit{K}_4}} $ 82.34 90.72 82.35 91.36 -
      极差(R) 3.07 4.56 7.64 1.69 -
      优水平 A1 B3 C1 D4 -
      注:A.初始浓度;B.反应时间;C.pH值;D.温度.
      下载: 导出CSV
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    • 收稿日期:  2010-08-12
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