Adsorption and Enrichment of Ag(I) from Wastewater Using Wheat Bran-Derived Biosorbent

IF 1.6 4区工程技术 Q3 ENGINEERING, CHEMICAL

Chemical Engineering & Technology Pub Date : 2025-07-08 DOI:10.1002/ceat.70075

Wanjia Feng, Yunfan Bai, Chuhua Qi, Pingping Wu, Zhixian He, Shuangli Chen, Sijing Zhang

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Abstract

2,5-Dimercapto-1,3,4-thiadiazole modified wheat bran (DMTD-WB), a bio-sorbent synthesized by immobilizing DMTD onto WB, demonstrated outstanding selectivity for Ag(I) recovery from multi-metal wastewater. Under optimized conditions (30 °C, pH 3.0, dosage of 6.00 g L⁻¹), an Ag(I) adsorption efficiency of 98.15 % was achieved. Fixed-bed adsorption experiments further confirmed its selectivity, whereas regeneration tests indicated a recovery efficiency of 81.43 % for Ag(I) after five cycles. Thermodynamic analysis revealed a maximum adsorption capacity of 60.39 mg g⁻¹ at 40 °C. Kinetic and mass transfer studies identified chemisorption via coordination as the dominant adsorption mechanism, with the homogeneous solid diffusion (HSD) model providing a satisfactory fit for the adsorption kinetics. Overall, this study highlights DMTD-WB as a sustainable and efficient adsorbent for Ag(I) recovery, offering a value-added approach to agricultural waste utilization in wastewater treatment.

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麦麸基生物吸附剂对废水中银(I)的吸附富集研究

2,5-二巯基-1,3,4-噻二唑改性麦麸（DMTD-WB）是一种将DMTD固定在麦麸上合成的生物吸附剂，对多金属废水中银(I)的回收具有良好的选择性。在最佳条件（30℃，pH 3.0，用量6.00 g L−1）下，银(I)的吸附效率为98.15%。固定床吸附实验进一步证实了其选择性，再生实验表明，经过5次循环后，银(I)的回收率为81.43%。热力学分析表明，在40°C时，其最大吸附量为60.39 mg g−1。动力学和传质研究表明，通过配位的化学吸附是主要的吸附机制，均质固体扩散（HSD）模型提供了满意的吸附动力学拟合。总体而言，本研究强调DMTD-WB是一种可持续、高效的Ag(I)吸附剂，为农业废弃物在废水处理中的利用提供了一种增值方法。

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来源期刊

Chemical Engineering & Technology 工程技术-工程：化工

CiteScore

3.80

自引率

4.80%

发文量

315

审稿时长

5.5 months

期刊介绍： This is the journal for chemical engineers looking for first-hand information in all areas of chemical and process engineering. Chemical Engineering & Technology is: Competent with contributions written and refereed by outstanding professionals from around the world. Essential because it is an international forum for the exchange of ideas and experiences. Topical because its articles treat the very latest developments in the field.