Facile preparation of tannic acid functionalized phosphogypsum for efficient removal of heavy metal in wastewater

Environmental Surfaces and Interfaces Pub Date : 2025-03-19 DOI:10.1016/j.esi.2025.03.001

Wei Hu, Juan Zhang, Jinyi Chen

{"title":"Facile preparation of tannic acid functionalized phosphogypsum for efficient removal of heavy metal in wastewater","authors":"Wei Hu, Juan Zhang, Jinyi Chen","doi":"10.1016/j.esi.2025.03.001","DOIUrl":null,"url":null,"abstract":"<div><div>Phosphogypsum (PG) as a by-product is produced by the industrial wet phosphoric acid production process. The environmental-friendly disposal and recycling of PG holds significant importance within the domain of solid waste management. In this research, due to its unique property of versatile molecular glue and the strong metal-chelating ability, polyphenol tannic acid (TA) was employed as an organic modifier to functionalize inert PG to prepare TA@PG adsorbent for effective removal of heavy metal in wastewater. The morphology, structure, thermal stability and surface charge of TA@PG adsorbent was characterized and tested. The effects of adsorption conditions, adsorption isotherms and adsorption kinetics were also studied in detail. In addition, the adsorption mechanisms were also discussed by XPS analysis, which might involve in electrostatic interaction, ion exchange and complexation interaction. The prepared TA@PG adsorbent exhibited excellent adsorption performance with removal rate up to 100% and maximum adsorption capacity up to 221.72 mg·g<sup>−1</sup> for heavy metal Cr (VI). The adsorbent preparation method in this study is simple, cost-effective, environmental-friendly without using organic solvent. It holds significant promise for large-scale production. This study provides a novel approach for the resource utilization of industrial solid waste PG, achieving the dual objectives of waste recycling and value addition.</div></div>","PeriodicalId":100486,"journal":{"name":"Environmental Surfaces and Interfaces","volume":"3 ","pages":"Pages 122-133"},"PeriodicalIF":0.0000,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Surfaces and Interfaces","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2949864325000074","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Phosphogypsum (PG) as a by-product is produced by the industrial wet phosphoric acid production process. The environmental-friendly disposal and recycling of PG holds significant importance within the domain of solid waste management. In this research, due to its unique property of versatile molecular glue and the strong metal-chelating ability, polyphenol tannic acid (TA) was employed as an organic modifier to functionalize inert PG to prepare TA@PG adsorbent for effective removal of heavy metal in wastewater. The morphology, structure, thermal stability and surface charge of TA@PG adsorbent was characterized and tested. The effects of adsorption conditions, adsorption isotherms and adsorption kinetics were also studied in detail. In addition, the adsorption mechanisms were also discussed by XPS analysis, which might involve in electrostatic interaction, ion exchange and complexation interaction. The prepared TA@PG adsorbent exhibited excellent adsorption performance with removal rate up to 100% and maximum adsorption capacity up to 221.72 mg·g⁻¹ for heavy metal Cr (VI). The adsorbent preparation method in this study is simple, cost-effective, environmental-friendly without using organic solvent. It holds significant promise for large-scale production. This study provides a novel approach for the resource utilization of industrial solid waste PG, achieving the dual objectives of waste recycling and value addition.

查看原文本刊更多论文

单宁酸功能化磷石膏的制备及其对废水中重金属的高效去除

磷石膏是工业湿式磷酸生产工艺的副产物。PG的环保处理和回收在固体废物管理领域具有重要意义。本研究利用多酚单宁酸（TA）独特的多用途分子胶特性和较强的金属螯合能力，以多酚单宁酸（TA）为有机改性剂，功能化惰性PG，制备TA@PG吸附剂，有效去除废水中的重金属。对TA@PG吸附剂的形貌、结构、热稳定性和表面电荷进行了表征和测试。研究了吸附条件、吸附等温线和吸附动力学对吸附性能的影响。此外，通过XPS分析探讨了吸附机理，认为吸附机理可能涉及静电作用、离子交换作用和络合作用。制备的TA@PG吸附剂对重金属Cr （VI）的吸附性能优异，去除率可达100%，最大吸附量可达221.72 mg·g−1。本研究制备的吸附剂制备方法简单、经济、环保，无需使用有机溶剂。它具有大规模生产的重大前景。本研究为工业固体废物PG资源化利用提供了一条新的途径，实现了废物回收和增值的双重目标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Environmental Surfaces and Interfaces

自引率

0.00%

发文量