{"title":"Bio-dissolution and kinetics of pyrite-bearing waste ores in presence of Acidithiobacillus ferrooxidans","authors":"","doi":"10.1016/S1003-6326(24)66545-3","DOIUrl":null,"url":null,"abstract":"<div><p>Bioleaching treatment was used to decontaminate pyrite-bearing waste rocks, mitigating the risk of acid mine drainage (AMD) generation at source. The bioleaching results showed that nearly 82% of Fe and S could be removed from pyrite-bearing waste within 40 d in the presence of <em>Acidithiobacillus ferrooxidans</em> (<em>A. ferrooxidans</em>). Kinetics study showed that the removal of pyrite from waste ore was mainly in the control of the chemical reaction and internal diffusion. The results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated that the formed biogenic jarosite could passivate the residual pyrite under the mediation of <em>A. ferrooxidans</em>. Secondary bioleaching experiments on the residual samples revealed no noticeable decrease in solution pH and only 8 and 160 mg/L of iron dissolved from the two residual mine waste samples, respectively, indicating that the acid and iron release capacity of the mine waste samples was weakened.</p></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632624665453/pdf?md5=b6d930852ad8f61aca6b9fa665ef3e68&pid=1-s2.0-S1003632624665453-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624665453","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
Bioleaching treatment was used to decontaminate pyrite-bearing waste rocks, mitigating the risk of acid mine drainage (AMD) generation at source. The bioleaching results showed that nearly 82% of Fe and S could be removed from pyrite-bearing waste within 40 d in the presence of Acidithiobacillus ferrooxidans (A. ferrooxidans). Kinetics study showed that the removal of pyrite from waste ore was mainly in the control of the chemical reaction and internal diffusion. The results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated that the formed biogenic jarosite could passivate the residual pyrite under the mediation of A. ferrooxidans. Secondary bioleaching experiments on the residual samples revealed no noticeable decrease in solution pH and only 8 and 160 mg/L of iron dissolved from the two residual mine waste samples, respectively, indicating that the acid and iron release capacity of the mine waste samples was weakened.
期刊介绍:
The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.