Conversion of agricultural residues into activated carbons for water purification: Application to arsenate removal
Conversion of agricultural residues into activated carbons for water purification: Application to arsenate removal
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DOI：
10.1080/10934529.2012.668390
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
J. Torres-Pérez;C. Gérente;Y. Andrès
中科院分区：
文献类型：
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作者：
J. Torres-Pérez;C. Gérente;Y. Andrès
介绍了甜菜浆和花生壳两种农业废弃物转化为可持续活性炭的方法，并对其在砷酸盐溶液处理中的应用前景进行了探讨。选择直接和物理活化以及对吸附剂进行简单的化学处理。测定了这些替代碳质多孔材料的材料性能，如BET表面积、孔隙体积、元素分析、灰分含量和pHPZC，并与市售颗粒活性炭进行了比较。在间歇式反应器中进行了基于实验动力学和平衡数据的吸附研究，并使用了不同的模型（颗粒内扩散、拟二阶、Langmuir和Freundlich）和在自然水中进行的等温线来完成。因此，甜菜果肉和花生壳是制备去除砷酸盐活性炭的良好前驱体。
The conversion of two agricultural wastes, sugar beet pulp and peanut hulls, into sustainable activated carbons is presented and their potential application for the treatment of arsenate solution is investigated. A direct and physical activation is selected as well as a simple chemical treatment of the adsorbents. The material properties, such as BET surface areas, porous volumes, elemental analysis, ash contents and pHPZC, of these alternative carbonaceous porous materials are determined and compared with a commercial granular activated carbon. An adsorption study based on experimental kinetic and equilibrium data is conducted in a batch reactor and completed by the use of different models (intraparticle diffusion, pseudo–second-order, Langmuir and Freundlich) and by isotherms carried out in natural waters. It is thus demonstrated that sugar beet pulp and peanut hulls are good precursors to obtain activated carbons for arsenate removal.