Adsorption of arsenic in aqueous solution onto iron impregnated bagasse fly ash

IF 3 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Journal of Environmental Health Science and Engineering Pub Date : 2022-08-23 DOI:10.1007/s40201-022-00827-w

Sundaramurthy Suresh, Mika Sillanpää, Fawzi Banat, Ravi Kiran Vissa

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引用次数: 3

Abstract

The present study examined the adsorption of As(III) and As(V) (arsenics) from aqueous solutions using FeCl₃ impregnated bagasse fly ash (BFA-Fe). Batch adsorption studies were carried out to evaluate the effect of various parameters like initial pH (pH₀), adsorbent dose (m), contact time (t), initial concentration (C₀) and temperature (T) on the removal of As(III) and As(V) from aqueous solutions. The maximum removal of As(III) and As(V) was found ~ 95% and ~ 97% at lower concentration (< 20 μg/dm³) and ~ 86% and ~ 87% at higher concentration (500 μg/dm³), respectively, using 3 g/dm³ of BFA dosage at 303 K. The adsorption of arsenics on BFA-Fe was very rapid. Pseudo-second-order kinetic model well represented the adsorption kinetics of both As(III) and As(V). Error analyses functions for adsorption of As(III) and As(V) onto BFA-Fe. Based on these error analyses, R-P isotherm was found to be fitted. Thermodynamic parameters, i.e., ΔG°, ΔH°, and ΔS°, were also calculated. At 25.0 to 45.0 °C, the values of ΔG° lie in the range of -43.85, -45.34, -48.82, -51.31, -53.8, and -44.75, -48.3, -51.84, -55.39, -58.93, -55.57 for As (III), and As (V) respectively, indicating that adsorption is spontaneous and exothermic in nature. Regeneration study was carried out by different solvent and thermal methods. Our results revealed that BFA-Fe can be reused directly for making fire-briquettes to explore its energy value. From this study, As containment is most effective removal from aqueous solution and mimic to any contaminated water resources.

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浸铁甘蔗渣粉煤灰对水溶液中砷的吸附研究

摘要本文研究了FeCl3浸渍甘蔗渣粉煤灰(BFA-Fe)对砷(As(III)和砷(V)的吸附性能。进行了批量吸附研究，以评价初始pH (pH0)、吸附剂剂量(m)、接触时间(t)、初始浓度(C0)和温度(t)等参数对水溶液中As(III)和As(V)的去除效果。当BFA用量为3 g/dm3，温度为303 K时，较低浓度(20 μg/dm3)对As(III)和As(V)的去除率分别为~ 95%和~ 97%，较高浓度(500 μg/dm3)对As(III)和As(V)的去除率分别为~ 86%和~ 87%。BFA-Fe对砷的吸附速度非常快。拟二级动力学模型较好地反映了As(III)和As(V)的吸附动力学。BFA-Fe吸附As(III)和As(V)的误差分析函数。根据这些误差分析，发现R-P等温线是拟合的。热力学参数，即ΔG°，ΔH°和ΔS°也进行了计算。在25.0 ~ 45.0℃时，As (III)和As (V)的ΔG°值分别为-43.85、-45.34、-48.82、-51.31、-53.8和-44.75、-48.3、-51.84、-55.39、-58.93、-55.57，表明吸附为自发和放热性质。采用不同的溶剂法和热法进行了再生研究。结果表明，BFA-Fe可以直接用于制造煤球，以探索其能量价值。从本研究中可以看出，As密封是最有效的去除水溶液和模拟任何污染水资源的方法。

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

Journal of Environmental Health Science and Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES

CiteScore

7.50

自引率

2.90%

发文量

期刊介绍： Journal of Environmental Health Science & Engineering is a peer-reviewed journal presenting timely research on all aspects of environmental health science, engineering and management. A broad outline of the journal''s scope includes: -Water pollution and treatment -Wastewater treatment and reuse -Air control -Soil remediation -Noise and radiation control -Environmental biotechnology and nanotechnology -Food safety and hygiene