Study on the remediation of arsenic pollution in tin tailings by Geopolymer-cementitious hybrids

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-06-21 DOI:10.1016/j.mineng.2025.109546

Chengping Li , Yang Liu , Shuntao Xu , Jinsong Wang , Chongjun Bao , Ying Liu , Zhengfu Zhang , Yuejing Bin , Dianwen Liu

{"title":"Study on the remediation of arsenic pollution in tin tailings by Geopolymer-cementitious hybrids","authors":"Chengping Li , Yang Liu , Shuntao Xu , Jinsong Wang , Chongjun Bao , Ying Liu , Zhengfu Zhang , Yuejing Bin , Dianwen Liu","doi":"10.1016/j.mineng.2025.109546","DOIUrl":null,"url":null,"abstract":"<div><div>The release of arsenic (As) from tin tailings poses significant environmental pollution challenges. Developing economic, green, and effective solutions for controlling As pollution from these tailings remains difficult. This study addresses this issue by developing a green multi-solid waste geopolymer, composed of tin tailings, red mud, desulphurized gypsum, and cement (TRGC). The optimized TRGC geopolymer achieved a maximum Unconfined Compressive Strength (UCS) of 41.49 MPa. Results demonstrate that arsenic immobilization primarily occurs through the formation of arsenic-ettringite, calcium arsenate (Ca-As), and iron arsenate (Fe-As) compounds, effectively preventing As release. The TRGC-15C formulation (activated with 15 wt% Ca(OH) <sub>2</sub>) exhibited a UCS of 34 MPa and the lowest 28-day As leaching concentration (3.31 mg/L) among the base formulations. Furthermore, the addition of ferrous sulfate significantly enhanced As fixation. The TRGC geopolymer incorporating 4 wt% ferrous sulfate achieved the highest UCS (41.54 MPa) and a markedly reduced 28-day leaching concentration of 0.096 mg/L, which is significantly lower than values reported in the literature. This work provides valuable insights into utilizing multi-solid waste geopolymers as environmentally friendly backfilling cementitious materials for arsenic immobilization.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"232 ","pages":"Article 109546"},"PeriodicalIF":4.9000,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Minerals Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0892687525003747","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

The release of arsenic (As) from tin tailings poses significant environmental pollution challenges. Developing economic, green, and effective solutions for controlling As pollution from these tailings remains difficult. This study addresses this issue by developing a green multi-solid waste geopolymer, composed of tin tailings, red mud, desulphurized gypsum, and cement (TRGC). The optimized TRGC geopolymer achieved a maximum Unconfined Compressive Strength (UCS) of 41.49 MPa. Results demonstrate that arsenic immobilization primarily occurs through the formation of arsenic-ettringite, calcium arsenate (Ca-As), and iron arsenate (Fe-As) compounds, effectively preventing As release. The TRGC-15C formulation (activated with 15 wt% Ca(OH) ₂) exhibited a UCS of 34 MPa and the lowest 28-day As leaching concentration (3.31 mg/L) among the base formulations. Furthermore, the addition of ferrous sulfate significantly enhanced As fixation. The TRGC geopolymer incorporating 4 wt% ferrous sulfate achieved the highest UCS (41.54 MPa) and a markedly reduced 28-day leaching concentration of 0.096 mg/L, which is significantly lower than values reported in the literature. This work provides valuable insights into utilizing multi-solid waste geopolymers as environmentally friendly backfilling cementitious materials for arsenic immobilization.

查看原文本刊更多论文

地聚合物-胶凝复合物修复锡尾矿中砷污染的研究

锡尾矿中砷的释放对环境污染构成重大挑战。制定经济、绿色、有效的尾矿砷污染治理方案仍然是一个难点。本研究通过开发由锡尾矿、赤泥、脱硫石膏和水泥（TRGC）组成的绿色多固体废物地聚合物来解决这一问题。优化后的TRGC地聚合物的最大无侧限抗压强度（UCS）为41.49 MPa。结果表明，砷的固定化主要通过砷钙矾石、砷酸钙（Ca-As）和砷酸铁（Fe-As）化合物的形成，有效地阻止了砷的释放。TRGC-15C配方（以15wt % Ca(OH) 2活化）的UCS为34 MPa， 28天As浸出浓度最低（3.31 mg/L）。此外，硫酸亚铁的添加显著增强了砷的固定。含有4 wt%硫酸亚铁的TRGC地聚合物获得了最高的UCS (41.54 MPa)，并显着降低了28天的浸出浓度0.096 mg/L，这明显低于文献报道的值。这项工作为利用多固体废物地聚合物作为环境友好的砷固定回填胶凝材料提供了有价值的见解。

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

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.