{"title":"麦麸基生物吸附剂对废水中银(I)的吸附富集研究","authors":"Wanjia Feng, Yunfan Bai, Chuhua Qi, Pingping Wu, Zhixian He, Shuangli Chen, Sijing Zhang","doi":"10.1002/ceat.70075","DOIUrl":null,"url":null,"abstract":"<p>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<sup>−1</sup>), 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<sup>−1</sup> 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.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"48 7","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Adsorption and Enrichment of Ag(I) from Wastewater Using Wheat Bran-Derived Biosorbent\",\"authors\":\"Wanjia Feng, Yunfan Bai, Chuhua Qi, Pingping Wu, Zhixian He, Shuangli Chen, Sijing Zhang\",\"doi\":\"10.1002/ceat.70075\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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<sup>−1</sup>), 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<sup>−1</sup> 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.</p>\",\"PeriodicalId\":10083,\"journal\":{\"name\":\"Chemical Engineering & Technology\",\"volume\":\"48 7\",\"pages\":\"\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Engineering & Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/ceat.70075\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering & Technology","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ceat.70075","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
摘要
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。
Adsorption and Enrichment of Ag(I) from Wastewater Using Wheat Bran-Derived Biosorbent
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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