Adsorption of Pb Ions from Oily Wastewater by Anthraquinone Modified Carbon Nanotube

IF 1 Q4 CHEMISTRY, MULTIDISCIPLINARY
V. M. Nansa, M. Otadi, A. Heydarinasab, R. Amiri
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引用次数: 0

Abstract

The aim of this research was to investigate the adsorption properties of anthraquinone modified carbon nanotube (ACNT) in oily wastewaters containing Pb ions. The modified adsorbents were characterized using Fourier transform infra-red spectroscopy and SEM analysis. The adsorption and regeneration studies were conducted in batch mode using a Taguchi (L16) orthogonal array to optimize experimental runs. The controllable factors used in this study consisted of: pH of the solution (A); adsorbent dosage (B); adsorbent type (C); contact time (D); temperature (F). The effects of each factor were studied at four levels on the removal efficiency of metals from aqueous solution. Concentrations of metal ions were assessed by atomic absorption spectrometer. The total optimum adsorptive removal of lead ions was obtained with C0 = 10 mg•l-1, T = 338 K, pH = 6, m = 0.020 mg and t = 60 min. The Langmuir model was representative to simulate adsorption isotherms. The adsorption kinetics of Pb adsorption by ACNT was modeled using the pseudo-first order, the pseudo-second order, and intraparticle diffusion kinetics equations. The results indicate that the pseudo-second order kinetic equation and intraparticle diffusion model were adequate to describe the adsorption kinetics.
蒽醌改性碳纳米管对含油废水中铅离子的吸附研究
研究了蒽醌改性碳纳米管(ACNT)在含铅含油废水中的吸附性能。利用傅里叶变换红外光谱和扫描电镜对改性吸附剂进行了表征。采用Taguchi (L16)正交实验优化了吸附和再生实验。本研究采用的可控因素包括:溶液的pH (A);吸附剂用量(B);吸附剂类型(C);接触时间(D);温度(F)。在四个水平上研究了每个因素对水溶液中金属的去除效率的影响。用原子吸收光谱仪测定了金属离子的浓度。在C0 = 10 mg•l-1、T = 338 K、pH = 6、m = 0.020 mg、T = 60 min条件下,铅离子的吸附去除效果最佳。Langmuir吸附等温线模型具有代表性。采用拟一级、拟二级和颗粒内扩散动力学方程对ACNT吸附Pb的吸附动力学进行了建模。结果表明,拟二级动力学方程和颗粒内扩散模型能较好地描述吸附动力学。
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
Chemistry & Chemical Technology
Chemistry & Chemical Technology CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.70
自引率
44.40%
发文量
60
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