Borassus aethiopum activated carbon prepared for nitrate ions removal

IF 1.4 Q4 WATER RESOURCES

Journal of Applied Water Engineering and Research Pub Date : 2021-07-14 DOI:10.1080/23249676.2021.1947400

H. Koné, Alain Stéphane Assémian, T. Tiho, K. Adouby, K. Yao, P. Drogui

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引用次数: 5

Abstract

This work aims to study nitrate ions removal using Borassus aethiopum activated carbon (BA-AC) in a synthetic medium. BA-AC was prepared through artisanal method in order to provide a low-cost activated carbon. Physico-chemical characterization of BA-AC has shown a high-specific surface area (1431 m2/g). Analysis of surface morphology by scanning electron microscopy, mean pore diameter (2.76 nm) and adsorption/desorption isotherm resulted in the mesoporous adsorbent. The existence of functional groups (C = O; C–H; C–OH) was highlighted by Fourier Transform Infrared spectroscopy. A percentage of 60.56% for nitrate ions at pH 4 was reached. Pseudo-second-order kinetic and Langmuir isotherm were the most suitable models to describe adsorption process. The thermodynamic study revealed that adsorption mechanism occurs spontaneously (ΔG° 0). Enthalpy (ΔH° = 1.89 kJ.mol−1) and entropy (ΔS° = 19.03 J.mol−1K−1) values indicate an endothermic process with an increase of disorder at the solid–liquid interface.

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用于去除硝酸根离子的硼砂活性炭的制备

本工作旨在研究在合成介质中使用硼藻活性炭（BA-AC）去除硝酸根离子。通过手工方法制备BA-AC，以提供低成本的活性炭。BA-AC的物理化学表征显示出高比表面积（1431m2/g）。通过扫描电子显微镜分析表面形态，平均孔径（2.76 nm）和吸附/解吸等温线得到了介孔吸附剂。官能团（C）的存在性 = O；C–H；C–OH）通过傅立叶变换红外光谱进行了突出显示。在pH为4时，硝酸根离子的百分比达到60.56%。拟二阶动力学和Langmuir等温线是描述吸附过程最合适的模型。热力学研究表明，吸附机理是自发发生的（ΔG°0）。焓（ΔH° = 1.89 kJ.mol−1）和熵（ΔS° = 19.03 J.mol−1K−1）值表明了一个吸热过程，固液界面无序度增加。

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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

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