Adsorption of dye using natural clay from water

IF 1 Q4 ENGINEERING, ENVIRONMENTAL

Journal of Environmental Engineering and Science Pub Date : 2022-07-18 DOI:10.1680/jenes.21.00051

M. Bourouiss, M. Djebbar, F. Djafri

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引用次数: 0

Abstract

Removal of the dye Methylene Blue from water at different concentrations, adsorbent pH and times was investigated. The natural clay was treated by cation exchange, which was confirmed by XRD and IR analyzes. Experimental results have shown that the high pH promotes adsorption. The adsorption isotherms are described by the equation of Langmuir and Freundlich isotherms. It is important to note that the quantity of CaO corresponding to calcite is higher in natural clay (9.7 % by weight) compared to Na-montmorillonite fraction (2.01% weight). It clearly shows that the clay dhkl spacing increased from d = 13.58 to d = 17 Å, which could be attributed to natural clay and Na-montmorillonite which confirms good clay purification. The maximum capacity of dyes adsorbed on Natural clay and Na-monmorillonite (Qmax) are (142.85 to 250 mg g−1) and (80 to 277.77 mg g−1) respectively. The correlation coefficients R2 = 0.99 of the Freundlich and Langmuir model for natural clays and Na-montmorillonte have the same values this indicates that the two models are best for the adsorption of dye Methylene Blue on natural clay and Na -montmorillonite.

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用天然粘土从水中吸附染料

研究了不同浓度、吸附剂pH和吸附时间对染料亚甲基蓝的去除效果。对天然粘土进行了阳离子交换处理，XRD和IR分析证实了这一点。实验结果表明，高pH值有利于吸附。吸附等温线用Langmuir和Freundlich等温线方程描述。值得注意的是，与钠蒙脱石部分（2.01%重量）相比，天然粘土中对应于方解石的CaO的量（9.7%重量）更高。这清楚地表明，粘土dhkl间距从d=13.58增加到d=17 Å，这可以归因于天然粘土和钠蒙脱石，这证实了良好的粘土纯化。染料在天然粘土和钠蒙脱石上的最大吸附量（Qmax）为（142.85-250） mg g−1）和（80至277.77 mg g−1）。Freundlich和Langmuir模型对天然粘土和钠蒙脱石的相关系数R2=0.99相同，这表明这两个模型最适合染料亚甲基蓝在天然粘土和纳蒙脱石上的吸附。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Environmental Engineering and Science 环境科学-工程：环境

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

12 months

期刊介绍： Journal of Environmental Engineering and Science is an international, peer-reviewed publication providing a forum for the dissemination of environmental research, encouraging interdisciplinary research collaboration to address environmental problems. It addresses all aspects of environmental engineering and applied environmental science, with the exception of noise, radiation and light.