Application in chromium (VI) removal of natural and dried cactus

Ciência & Tecnologia dos Materiais Pub Date : 2017-09-01 DOI:10.1016/j.ctmat.2018.01.001

F. Sakr, A. Sennaoui, M. Dinne, S. Alahiane, I. Bakas, M. Belmoden, A. Assabbane

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引用次数: 4

Abstract

This research presents two type of cactus (Opuntia ficus-indica) (natural cactus (NC) and dried cactus (DC)) as a biological adsorbent, evaluated for the effectiveness of hexavalent chromium Cr(VI) removal from artificially contaminated aqueous solutions. The characterization of the biosorbents were made using different techniques such as X-ray Fluorescence (XRF), Fourier transform infrared (FTIR) and Scanning Electron Microscope (SEM) to better understand the adsorption mechanism-property relationship. Adsorption kinetics showed that the adsorption behavior followed the pseudo-second-order kinetic model. The adsorption isotherms fitted by the Langmuir model showed that the highest Cr(VI) adsorption capacities using natural cactus and dried cactus are 21.19 and 2.63 mg/g respectively. Additionally, various physiochemical parameters such as contact time, adsorbent dosage, pH and temperature were investigated in a batch-adsorption technique. The results illustrated that the cactus have significant potential as economic, safe and effective adsorbent materials for the Cr(VI) adsorption from the aqueous solution.

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天然仙人掌和干仙人掌除铬(VI)的应用

本研究将两种仙人掌(Opuntia ficus-indica)(天然仙人掌(NC)和干仙人掌(DC))作为生物吸附剂，对人工污染水溶液中六价铬Cr(VI)的去除效果进行了评价。利用x射线荧光(XRF)、傅里叶变换红外(FTIR)和扫描电镜(SEM)等不同技术对生物吸附剂进行了表征，以更好地了解吸附机理与性能之间的关系。吸附动力学表明，吸附行为符合准二级动力学模型。Langmuir模型拟合的等温线表明，天然仙人掌和干仙人掌的Cr(VI)吸附量最高，分别为21.19和2.63 mg/g。此外，还考察了不同的理化参数，如接触时间、吸附剂用量、pH和温度。结果表明，仙人掌作为一种经济、安全、有效的吸附材料具有很大的潜力。

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Ciência & Tecnologia dos Materiais

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