Process evaluation for the recovery of rare earth from bastnaesite using ferric sulfate bio acid

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Resources Conservation and Recycling Pub Date : 2025-01-10 DOI:10.1016/j.resconrec.2024.108115

Wei Liu , Jing Liu , Emmanuel Yaw Owusu-Fordjour , Xinbo Yang

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引用次数: 0

Abstract

The ferric sulfate bio acid (BA) produced from the bio-oxidation of pyrite in coal waste has been found to be a potential lixiviant to recover metals such as rare earth elements (REEs). Herein, a novel process consisting of oxidation roasting-BA leaching-reductive solvent extraction (SX) was proposed to recover REEs from a bastnaesite concentrate. Parametric leaching tests were conducted to evaluate the leaching performance of the BA. Subsequently, SX after ascorbic acid (ASA) reduction and selective precipitation were tested separately to purify the BA leachate. Results show that, similar to 0.2 M H₂SO₄, the BA can effectively recover 90 % of the major REEs from the roasted bastnaesite under optimal conditions. Compared to selective precipitation, SX after ASA reduction was more effective in separating REEs from Fe and other contaminants. The proposed process offers a new path to recover REEs and manage coal waste in a sustainable way.

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.