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Adsorption Isotherm, Kinetic and Thermodynamic Modelling of Bacillus subtilisATCC13952 Mediated Adsorption of Arsenic in Groundwaters of Selected Gold Mining Communities in the Wassa West Municipality of the Western Region of Ghana

机译:枯草芽孢杆菌的吸附等温线,动力学和热力学建模枯草芽孢杆菌13952介导在加纳西部地区选定的金矿社区地下水域地下水中的吸附

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摘要

This study investigated Bacillus subtilis ATCC13952 as an adsorbent for arsenic in groundwater. Batch experiments were used to determine the effect of contact time, adsorbent dose, arsenic (III) concentration, pH, and temperature on the process. The percentage of arsenic (III) removed was high at a contact time of four days, 3.0 mL of Bacillus subtilis ATCC13952, pH 8 and temperature of 35°C. The kinetics of the process showed the Elovich kinetics model as the best fit for the process. This indicates that arsenic removal was by chemisorption. The analysis of the nonlinear equilibrium isotherms and the error functions showed the Langmuir isotherm as best fit for the process. Mechanistic study of the process indicated bulk diffusion to be the rate-determining step. Thermodynamically, the process was favourable, spontaneous and feasible. When the community water samples were treated with the Bacillus subtilis ATCC13952 at the optimum contact time, adsorbent dose, pH and temperature, 99.96% - 99.97% of arsenic was removed across all sampling points within the studied communities. Hence, the results show that Bacillus subtilis ATCC13952 is an efficient adsorbent for arsenic in aqueous systems and the organism appears to hold the key to purging the environment of arsenic contamination.
机译:本研究研究了枯草芽孢杆菌ATCC13952作为地下水中砷的吸附剂。分批实验用于确定接触时间,吸附剂剂量,砷(III)浓度,pH和温度对该方法的影响。除去的砷(III)的百分比高于四天的接触时间,3.0ml枯草芽孢杆菌ATCC13952,pH8和35℃的温度。该过程的动力学显示了Elovich动力学模型作为该过程的最佳拟合。这表明砷的去除是通过化学吸附。非线性平衡等温线的分析及误差函数显示Langmuir等温线作为该过程最适合。该过程的机械研究表明批量扩散是速率确定步骤。热力学上,该过程是有利的,自发性和可行的。当在最佳接触时间用枯草芽孢杆菌ATCC13952处理社区水样品时,吸附剂量,pH和温度,99.96%-99.97%的砷除去了所研究的社区内的所有取样点。因此,结果表明,枯草芽孢杆菌ATCC13952是砷中砷中的有效吸附剂,并且生物体似乎保持了吹扫砷污染环境的关键。

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  • 来源
    《美国分析化学(英文)》 |2021年第005期|P.121-161|共41页
  • 作者单位

    Department of Chemistry Education College of Agriculture Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Mampong-Ashanti Ghana;

    Department of Chemistry Education College of Agriculture Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Mampong-Ashanti Ghana;

    Department of Chemistry Education College of Agriculture Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Mampong-Ashanti Ghana;

    Department of Biological Sciences Education College of Agriculture Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Mampong-Ashanti Ghana;

    Department of Biological Sciences Education College of Agriculture Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Mampong-Ashanti Ghana;

    Department of Molecular Biology School of Biological Sciences College of Agriculture and Natural Sciences University of Cape Coast Cape Coast Ghana;

    Department of Theoretical and Applied Biology Kwame Nkrumah University of Science and Technology Kumasi Ghana;

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  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 物理化学(理论化学)、化学物理学;
  • 关键词

    Adsorption Isotherms; Bacillus subtilis ATCC13952; Kinetic; Thermodynamic; Nonlinear Error Functions; Sum of the Normalized Errors; Chemisorption;

    机译:吸附等温线;芽孢杆菌枯草芽孢杆菌ATCC13952;动力学;热力学;非线性误差函数;标准化误差的总和;化学;
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