Utilizing Recycled concrete aggregate for treating Acid mine drainage

Cleaner Materials Pub Date : 2023-09-01 DOI:10.1016/j.clema.2023.100205

Elmira Brooshan , Tommi Kauppila , Małgorzata Szlachta , Mohammad Jooshaki , Jussi Leveinen

{"title":"Utilizing Recycled concrete aggregate for treating Acid mine drainage","authors":"Elmira Brooshan , Tommi Kauppila , Małgorzata Szlachta , Mohammad Jooshaki , Jussi Leveinen","doi":"10.1016/j.clema.2023.100205","DOIUrl":null,"url":null,"abstract":"<div><p>This study focuses on treating Acid Mine Drainage (AMD) using Recycled Concrete Aggregate (RCA) as a cost-effective and environmentally friendly material. RCA is utilized, considering its availability at low cost, to reduce heavy metal and sulfate concentration in AMD and neutralize its acidity in batch experimental mode. To that end, the adsorptive properties of RCA were characterized before and after adsorption by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), elemental mapping, Brunauer-Emmett-Teller (BET) surface area measurements, and X-ray Diffraction. Furthermore, the organic functional groups of the tested materials were identified by Fourier Transform Infrared Spectroscopy (FT-IR). Adsorption parameters such as dosage, contact time, the grain size distribution of adsorbent particles, and the solution pH, were optimized for enhancing the removal performance. The pH point of zero charges for the RCA sample was defined. The results revealed that RCA is a potential eco-friendly material for AMD treatment. The concentration of sulfate in the tested AMD water was reduced by approximately 84%, while that of the metal elements declined as follows: iron 100%, manganese 95%, copper 66%, zinc 97%, and lead 76%. Also, the pH value of AMD water increased rapidly and reached neutral by using small quantities of RCA (≤1g/L).</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"9 ","pages":"Article 100205"},"PeriodicalIF":0.0000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cleaner Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772397623000382","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

This study focuses on treating Acid Mine Drainage (AMD) using Recycled Concrete Aggregate (RCA) as a cost-effective and environmentally friendly material. RCA is utilized, considering its availability at low cost, to reduce heavy metal and sulfate concentration in AMD and neutralize its acidity in batch experimental mode. To that end, the adsorptive properties of RCA were characterized before and after adsorption by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), elemental mapping, Brunauer-Emmett-Teller (BET) surface area measurements, and X-ray Diffraction. Furthermore, the organic functional groups of the tested materials were identified by Fourier Transform Infrared Spectroscopy (FT-IR). Adsorption parameters such as dosage, contact time, the grain size distribution of adsorbent particles, and the solution pH, were optimized for enhancing the removal performance. The pH point of zero charges for the RCA sample was defined. The results revealed that RCA is a potential eco-friendly material for AMD treatment. The concentration of sulfate in the tested AMD water was reduced by approximately 84%, while that of the metal elements declined as follows: iron 100%, manganese 95%, copper 66%, zinc 97%, and lead 76%. Also, the pH value of AMD water increased rapidly and reached neutral by using small quantities of RCA (≤1g/L).

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

利用再生混凝土骨料处理矿山酸性废水

本研究的重点是使用再生混凝土骨料（RCA）作为一种具有成本效益和环境友好的材料来处理酸性矿山排水（AMD）。考虑到RCA的低成本可用性，在分批实验模式下，RCA被用于降低AMD中的重金属和硫酸盐浓度并中和其酸度。为此，通过扫描电子显微镜（SEM）、能谱仪（EDS）、元素图谱、Brunauer-Emmett-Teller（BET）表面积测量和X射线衍射对吸附前后RCA的吸附性能进行了表征。此外，通过傅立叶变换红外光谱（FT-IR）对测试材料的有机官能团进行了鉴定。对吸附剂用量、接触时间、吸附剂颗粒的粒度分布和溶液pH等吸附参数进行了优化，以提高其去除性能。对RCA样品的零电荷pH点进行了定义。结果表明，RCA是一种潜在的用于AMD治疗的环保材料。测试AMD水中硫酸盐的浓度降低了约84%，而金属元素的浓度下降如下：铁100%、锰95%、铜66%、锌97%和铅76%。此外，通过使用少量RCA（≤1g/L），AMD水的pH值迅速升高并达到中性。

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分钟内获得全文去求助

来源期刊

Cleaner Materials

CiteScore

9.20

自引率

0.00%

发文量