Competitive Adsorption of Arsenic and Fluoride onto Economically Prepared Aluminum Oxide/Hydroxide Nanoparticles: Multicomponent Isotherms and Spent Adsorbent Management
Competitive Adsorption of Arsenic and Fluoride onto Economically Prepared Aluminum Oxide/Hydroxide Nanoparticles: Multicomponent Isotherms and Spent Adsorbent Management
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DOI：
10.1021/acs.iecr.7b01139
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发表时间：
2017-07
影响因子：
4.2
通讯作者：
V. Rathore;P. Mondal
中科院分区：
文献类型：
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作者：
V. Rathore;P. Mondal
研究了纳米氧化铝/氢氧化物（AHNP）对单组分和双组分体系中砷和氟的吸附去除。单组分体系在最佳条件下吸附剂的最大吸附量分别为砷833.33 μg/g和氟2000 μg/g。吸附过程符合Langmuir吸附等温式和准二级动力学模型。一个含砷512 μg/L、氟沿着6300 μg/L的真实的地下水样品也得到了成功的处理。在不同的等温线，修正的竞争Langmuir等温线被认为是最适合代表的双组分系统。通过砖形成的废吸附剂的固化进行了研究，发现这一过程是一个有效的选择，其管理。通过经济评价，吸附剂和处理成本分别为86.89 INR/kg和0.36 INR/L。
The present study deals with adsorptive removal of arsenic and fluoride in single as well as bicomponent system using aluminum oxide/hydroxide nanoparticles (AHNP). For single component system, the Langmuir maximum adsorption capacity of the adsorbent is found as 833.33 μg/g for arsenic and 2000 μg/g for fluoride at optimum conditions. The adsorption process is well explained by Langmuir isotherm and pseudo-second-order kinetic models for both arsenic and fluoride. A real groundwater sample, having arsenic 512 μg/L and fluoride 6300 μg/L along with other ions, has also been treated successfully. Among different isotherms, the modified competitive Langmuir isotherm is found to be most suitable to represent the bicomponent system. Solidification of the spent adsorbent through brick formation is investigated, and this process is found to be an effective option for its management. Through economic evaluation, the adsorbent and treatment costs are found as ∼86.89 INR/kg and 0.36 INR/L, respectively.