Studies on the Adsorption of 2-Chlorophenol onto Rice Straw Activated Carbon from Aqueous Solution and its Regeneration

IF 1.6 4区生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Chemical and Biochemical Engineering Quarterly Pub Date : 2022-04-11 DOI:10.15255/cabeq.2021.2004

M. Mahapatra, Arvind Kumar

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引用次数: 2

Abstract

For this study a low-cost adsorbent, rice straw activated carbon (RSAC) was prepared via thermochemical routes after being impregnated with ZnCl 2 . Characterization studies performed on RSAC have revealed that RSAC is a mesoporous adsorbent with significant affinity towards 2-chlorophenol (2-CP). The optimal values for process parameters were investigated via experimental runs. The optimal values of process parameters such as RSAC dose, pH of 2-CP solution, contact time, and temperature were found to be; 1.25 g L –1 , 8, 125 min, and 303 K, respectively. The Langmuir isotherm and pseu-do-first-order kinetics models were found to be in good agreement with the experimental data for this adsorption system. The adsorption thermodynamics studies have revealed that the adsorption of 2-CP onto RSAC is exothermic and spontaneous. Regeneration studies of RSAC using hydrogen peroxide have revealed that RSAC was effectively regenerated for four consecutive cycles. This research has proved the potential of RSAC for abating 2-CP from aqueous solutions.

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稻秆活性炭对2-氯酚的吸附及再生研究

在本研究中，稻草活性炭（RSAC）经ZnCl2浸渍后，通过热化学途径制备了一种低成本的吸附剂。对RSAC进行的表征研究表明，RSAC是一种对2-氯酚（2-CP）具有显著亲和力的介孔吸附剂。通过实验研究了工艺参数的最佳值。工艺参数如RSAC剂量、2-CP溶液的pH、接触时间和温度的最佳值为；分别为1.25 g L–1、8、125 min和303 K。Langmuir等温线和pseu-do一级动力学模型与该吸附系统的实验数据吻合较好。吸附热力学研究表明，2-CP在RSAC上的吸附是放热和自发的。使用过氧化氢对RSAC的再生研究表明，RSAC在连续四个循环中有效再生。本研究证明了RSAC在从水溶液中去除2-CP方面的潜力。

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

Chemical and Biochemical Engineering Quarterly 工程技术-工程：化工

CiteScore

2.70

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： The journal provides an international forum for presentation of original papers, reviews and discussions on the latest developments in chemical and biochemical engineering. The scope of the journal is wide and no limitation except relevance to chemical and biochemical engineering is required. The criteria for the acceptance of papers are originality, quality of work and clarity of style. All papers are subject to reviewing by at least two international experts (blind peer review). The language of the journal is English. Final versions of the manuscripts are subject to metric (SI units and IUPAC recommendations) and English language reviewing. Editor and Editorial board make the final decision about acceptance of a manuscript. Page charges are excluded.