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Review

Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System

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Department of Mechanical and Manufacturing Engineering, University of Calgary, ICT 402, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
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Department of Civil and Environmental Engineering, University of Calgary, ENF 262, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
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Stantec, 200-325 25 Street SE, Calgary, AB T2A 7H8, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Lorenzo Proia
Water 2021, 13(11), 1473; https://doi.org/10.3390/w13111473
Received: 8 April 2021 / Revised: 5 May 2021 / Accepted: 7 May 2021 / Published: 24 May 2021
In both aquatic and terrestrial environment, selenium contamination may exist at concentrations above the micronutrient limit. Since there is such a narrow bandwidth between which selenium concentration is acceptable, the health of the public may be at risk of selenium toxicity once the concentration increases beyond a threshold. Selenium contamination in an aqueous environment can occur due to anthropogenic activities and/or from natural sources. This study presents a review of the forms of selenium, inorganic and organic selenium contamination, mobilization, analytical methods for various forms of selenium and remediation strategies. The review also provides recent advances in removal methods for selenium from water including bioremediation, precipitation, coagulation, electrocoagulation, adsorption, nano-zerovalent iron, iron co-precipitation and other methods. A review of selenomethionine and selenocysteine removal strategy from industrial wastewaters is presented. Selenium resource recovery from copper ore processing has been discussed. Various analytical methods used for selenium and heavy metal analysis were compared. Importantly, existing knowledge gaps were identified and prospective areas for further research were recommended. View Full-Text
Keywords: selenium; remediation; environmental; analytical techniques; water; wastewater treatment; adsorption; organoselenium selenium; remediation; environmental; analytical techniques; water; wastewater treatment; adsorption; organoselenium
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MDPI and ACS Style

Okonji, S.O.; Achari, G.; Pernitsky, D. Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System. Water 2021, 13, 1473. https://doi.org/10.3390/w13111473

AMA Style

Okonji SO, Achari G, Pernitsky D. Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System. Water. 2021; 13(11):1473. https://doi.org/10.3390/w13111473

Chicago/Turabian Style

Okonji, Stanley O., Gopal Achari, and David Pernitsky. 2021. "Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System" Water 13, no. 11: 1473. https://doi.org/10.3390/w13111473

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