Synthesis of activated carbon from banana peels for dye removal of an aqueous solution in textile industries: optimization, kinetics, and isotherm aspects

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-03-27 DOI:10.2166/wpt.2023.042
Talbachew Tadesse Nadew, Mestawot Keana, Tsegaye Sisay, Belay Getye
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引用次数: 1

Abstract

Treatment of harmful chemicals using materials at our disposal is the way forward to be. This study presents the activation of waste banana peels and the investigation of the bio-adsorption potential for dye removal from an aqueous solution. The banana peel was activated both thermally and chemically by a preliminary study of a 0.5–2.5 M of sulfuric acid concentration, and 50–90 °C of temperature for 1–5 h of activation time. Activation at 1.5 M of acid concentration, at 70 °C for 3 h showed a promising efficacy of about 90% of dye removal. The activated banana peel was characterized by proximate analysis, BET, TGA, SEM, XRD, and FTIR. BET results showed activated banana peels to be porous materials with a surface area of 302 m2/g. The capacity of the adsorbent with different variable ranges (adsorption time 20–140 min, pH 1.0–7.0, adsorbent dose 1–4 g/L and initial dye concentration 20–80 mg/L) was conducted based on a preliminary study. The adsorption process was optimized numerically and the results were the following: adsorption time of 60 min, pH 3, adsorbent dose of 2 g/L and an initial dye concentration of 40 mg/L. In the adsorption study, the pseudo-second-order kinetics model and Langmuir isotherm model were the best fit to describe the adsorption process.
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用香蕉皮合成活性炭去除纺织工业中染料的水溶液:优化,动力学和等温线方面
使用我们可处理的材料处理有害化学物质是未来的发展方向。本研究介绍了废香蕉皮的活化和从水溶液中去除染料的生物吸附潜力的研究。通过对0.5–2.5 M硫酸浓度和50–90°C温度下1–5小时活化时间的初步研究,对香蕉皮进行了热活化和化学活化。在1.5 M的酸浓度下,在70°C下活化3小时,显示出约90%的染料去除效果。通过近红外光谱、BET、TGA、SEM、XRD、FTIR等测试手段对活性香蕉皮进行了表征。BET结果显示活化的香蕉皮是表面积为302m2/g的多孔材料。在初步研究的基础上,对不同可变范围(吸附时间20–140分钟,pH 1.0–7.0,吸附剂剂量1–4 g/L和初始染料浓度20–80 mg/L)的吸附剂容量进行了研究。对吸附过程进行了数值优化,结果表明:吸附时间为60min,pH值为3,吸附剂用量为2g/L,染料初始浓度为40mg/L。在吸附研究中,拟二阶动力学模型和Langmuir等温线模型最适合描述吸附过程。
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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