Selenium (Se) recovery for technological applications from environmental matrices based on biotic and abiotic mechanisms

Wang, Zhongli; Wang, Yanming; Gomes, Rachel L.; Gomes, Helena I.

Abstract

Selenium (Se) is an essential element with application in manufacturing from food to medical industries. Water contamination by Se is of concern due to anthropogenic activities. Recently, Se remediation has received increasing attention. Hence, different types of remediation techniques are listed in this work, and their potential for Se recovery is evaluated. Sorption, co-precipitation, coagulation and precipitation are effective for low-cost Se removal. In photocatalytic, zero-valent iron and electrochemical systems, the above mechanisms occur with reduction as an immobilization and detoxification process. In combination with magnetic separation, the above techniques are promising for Se recovery. Biological Se oxyanions reduction has been widely recognized as a cost-effective method for Se remediation, simultaneously generating biosynthetic Se nanoparticles (BioSeNPs). Increasing the extracellular production of BioSeNPs and controlling their morphology will benefit its recovery. However, the mechanism of the microbial production of BioSeNPs is not well understood. Se containing products from both microbial reduction and abiotic methods need to be refined to obtain pure Se. Eco-friendly and cost-effective Se refinery methods need to be developed. Overall, this review offers insight into the necessity of shifting attention from Se remediation to Se recovery.

Citation

Wang, Z., Wang, Y., Gomes, R. L., & Gomes, H. I. (2022). Selenium (Se) recovery for technological applications from environmental matrices based on biotic and abiotic mechanisms. Journal of Hazardous Materials, 427, Article 128122. https://doi.org/10.1016/j.jhazmat.2021.128122

• Journal Article Type: Article
• Acceptance Date: Dec 20, 2021
• Online Publication Date: Dec 23, 2021
• Publication Date: Apr 5, 2022
• Deposit Date: Jan 4, 2022
• Publicly Available Date: Dec 24, 2022
• Journal: Journal of Hazardous Materials
• Print ISSN: 0304-3894
• Electronic ISSN: 1873-3336
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 427
• Article Number: 128122
• DOI: https://doi.org/10.1016/j.jhazmat.2021.128122
• Keywords: Health, Toxicology and Mutagenesis; Pollution; Waste Management and Disposal; Environmental Chemistry; Environmental Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/7162833
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0304389421030922
• Additional Information: This article is maintained by: Elsevier; Article Title: Selenium (Se) recovery for technological applications from environmental matrices based on biotic and abiotic mechanisms; Journal Title: Journal of Hazardous Materials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jhazmat.2021.128122; Content Type: article; Copyright: © 2021 Elsevier B.V. All rights reserved.