Removal of Eriochrome black-T from wastewater by utilizing the commercial DF-120 anion exchange membrane

Next Energy Pub Date : 2024-04-01 DOI:10.1016/j.nxener.2024.100096

Muhammad Imran Khan , Abdallah Shanableh , Ayesha Javid , Suryyia Manzoor

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Abstract

This work describes the batch adsorption of Eriochrome black-T (EBT) an anionic dye onto the DF-120 commercial anion exchange membrane (AEM) from wastewater at 25 °C. The effect membrane dosage, temperature, ionic strength, contact time, pH and initail concentration on EBT adsorption was illustrated. Adsorption capacity (q_e) was enhanced from 7.32 to 12.71, 1.77 to 12.71, 6.71 to 12.71, and 16.16 to 17.39 mg/g with membrane dosage (mass), initial concentration, contact time, and ionic strength respectively while decreased from 12.71 to 3.77 and 12.71 to 3.65 mg/g with temperature and pH of medium respectively. Adsorption of EBT was subjected to various adsorption isotherms including Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) models. It was noticed that EBT adsorption obeyed Freundlich isotherm because the value of correlation coefficient (R² = 0.991) was close to unity. Several kinetics models were utilized to demonstrate EBT adsorption. Results showed that EBT adsorption fitted to pseudo-second order (PSO) model because the value of correlation coefficient (R² = 0.997) was close to unity. Adsorption thermodynamics study represented that EBT adsorption onto the DF-120 commercial AEM was an exothermic process (ΔH°= −79.78 KJ/mol). In addition, the regeneration of DF-120 commercial AEM was also studied.

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利用商用 DF-120 阴离子交换膜去除废水中的 Eriochrome black-T

本研究介绍了在 25 °C 下，DF-120 商用阴离子交换膜（AEM）对废水中阴离子染料 Eriochrome black-T （EBT）的批量吸附。结果表明了膜用量、温度、离子强度、接触时间、pH 值和初始ail 浓度对 EBT 吸附的影响。随着膜用量（质量）、初始浓度、接触时间和离子强度的增加，吸附容量（qe）分别从 7.32 毫克/克提高到 12.71 毫克/克、1.77 毫克/克提高到 12.71 毫克/克、6.71 毫克/克提高到 12.71 毫克/克和 16.16 毫克/克提高到 17.39 毫克/克，而随着温度和介质 pH 值的增加，吸附容量（qe）分别从 12.71 毫克/克降低到 3.77 毫克/克和 12.71 毫克/克降低到 3.65 毫克/克。对 EBT 的吸附采用了各种吸附等温线，包括 Langmuir、Freundlich、Temkin 和 Dubinin-Radushkevich (D-R) 模型。由于相关系数（R2 = 0.991）接近统一值，因此发现 EBT 的吸附服从于 Freundlich 等温线。研究人员利用多个动力学模型来证明 EBT 的吸附作用。结果表明，EBT 的吸附符合假二阶（PSO）模型，因为相关系数（R2 = 0.997）接近于一。吸附热力学研究表明，EBT 在 DF-120 商用 AEM 上的吸附是一个放热过程（ΔH°= -79.78 KJ/mol）。此外，还研究了 DF-120 商用 AEM 的再生问题。

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Next Energy

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