KINETICS OF ADSORPTION OF HEAVY METALS (IRON) FROM TEXTILE INDUSTRY WASTE USING CALCIUM CARBIDE RESIDUE AS ADSORBENT

M. A. Karim, Netty Herawati, Henny Juniar
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Abstract

This research was conducted to study the efficiency of residual calcium carbide as an adsorbent using a batch process to remove iron (II) from textile industrial waste. In this study, the iron (II) content in textile industrial waste was synthetically made using . The effluent was characterized using a standard method (atomic absorption spectrometry), while the functional groups responsible for the Adsorption of iron to the surface of the calcium carbide residue were observed using SEM and Fourier Transform Infra-red (FTIR). The SEM findings revealed a highly porous morphology. FTIR revealed the presence of various functional groups (OH, CH, C=C, and C-C). Factors affecting Adsorption, eg, contact time, adsorbent dose, pH, and iron concentration, were also studied. The maximum iron (II) ion adsorption was observed to occur at pH 6. Kinetic studies showed a good correlation and best suited the pseudo-second-order kinetic model. Langmuir and Freundlich's isotherm model was used to describe the Adsorption of iron (II) on calcium carbide residues. The data obtained from the adsorption process most closely matched the Langmuir model with a correlation value of R^2 = 0.9959 and q_e=1.697 mg/g. with a pseudo-second-order kinetic model with a correlation coefficient value (R2), which is 0.9962 for an adsorbent mass of 7.5 g. The Adsorption of iron ions from textile wastewater synthesis solution using calcium carbide residues shows a physisorption mechanism.
电石渣作为吸附剂对纺织废渣中重金属(铁)的吸附动力学研究
采用间歇法研究了残余电石作为吸附剂对纺织工业废铁(II)的去除效果。本研究以纺织工业废料中的铁(II)含量为原料,利用。利用原子吸收光谱法对出水进行了表征,利用扫描电镜和傅里叶变换红外(FTIR)对电石渣表面吸附铁的官能团进行了观察。SEM结果显示其具有高度多孔的形貌。FTIR显示了各种官能团(OH, CH, C=C和C-C)的存在。研究了接触时间、吸附剂剂量、pH、铁浓度等因素对吸附性能的影响。pH值为6时,铁离子吸附量最大。动力学研究结果表明,两者具有良好的相关性,最适合拟二级动力学模型。采用Langmuir和Freundlich等温模型描述了铁(II)在电石渣上的吸附。吸附过程得到的数据与Langmuir模型最接近,相关值为R^2 = 0.9959, q_e=1.697 mg/g。吸附质量为7.5 g时,建立了准二级动力学模型,相关系数R2为0.9962。电石渣对纺织废水合成液中铁离子的吸附表现为物理吸附机制。
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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