{"title":"Biosynthesis of manganese nanoparticles for efficient recovery of rare earth elements from mining wastewater","authors":"Ganchen Zhou, Xiaoying Jin, Zuliang Chen","doi":"10.1016/j.jwpe.2025.106987","DOIUrl":null,"url":null,"abstract":"<div><div>Ionic rare earth mining wastewater contains a certain amount of rare earth elements (REEs). Given the scarcity and great application potential of REEs, this study explored the potential of employing manganese nanoparticles (GT-Mn) derived from green tea to recover REEs from mining wastewater. The maximum adsorption efficiencies of GT-Mn on REEs were 98.50 % (Y), 94.85 % (La), 73.33 % (Gd), 75.00 % (Dy), and 81.25 % (Yb), respectively. Characterizations were conducted to elucidate the mechanism of GT-Mn in the recovery of REEs. The findings revealed that the adsorption capacity of GT-Mn for REEs is predominantly attributed to the presence of organic functional groups, including tyrosine and theanine, along with the interactions of Mn<img>O bonding interactions. Moreover, the zeta analysis supported the electrostatic interaction between GT-Mn and REEs. Thus, the key physicochemical properties of REEs removal by GT-Mn were statistically analyzed by Pearson's correlation analysis, indicating that the removal mechanism of REEs included complexation and electrostatic force. The desorption of REEs from GT-Mn in 0.01 M acetic acid (CH<sub>3</sub>COOH) solution showed that the desorption efficiency of REEs exceeded 75.00 %. Overall, GT-Mn demonstrates significant potential and advantages in the realm REEs recovery, which can achieve the dual benefits of environmental remediation and resource conservation.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106987"},"PeriodicalIF":6.3000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714425000595","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
Ionic rare earth mining wastewater contains a certain amount of rare earth elements (REEs). Given the scarcity and great application potential of REEs, this study explored the potential of employing manganese nanoparticles (GT-Mn) derived from green tea to recover REEs from mining wastewater. The maximum adsorption efficiencies of GT-Mn on REEs were 98.50 % (Y), 94.85 % (La), 73.33 % (Gd), 75.00 % (Dy), and 81.25 % (Yb), respectively. Characterizations were conducted to elucidate the mechanism of GT-Mn in the recovery of REEs. The findings revealed that the adsorption capacity of GT-Mn for REEs is predominantly attributed to the presence of organic functional groups, including tyrosine and theanine, along with the interactions of MnO bonding interactions. Moreover, the zeta analysis supported the electrostatic interaction between GT-Mn and REEs. Thus, the key physicochemical properties of REEs removal by GT-Mn were statistically analyzed by Pearson's correlation analysis, indicating that the removal mechanism of REEs included complexation and electrostatic force. The desorption of REEs from GT-Mn in 0.01 M acetic acid (CH3COOH) solution showed that the desorption efficiency of REEs exceeded 75.00 %. Overall, GT-Mn demonstrates significant potential and advantages in the realm REEs recovery, which can achieve the dual benefits of environmental remediation and resource conservation.
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The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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