用于去除硝酸根离子的硼砂活性炭的制备

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

摘要

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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Borassus aethiopum activated carbon prepared for nitrate ions removal

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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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

期刊介绍： JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.