Co-exposure of microplastics and heavy metals in the marine environment and remediation techniques: a comprehensive review.

Autor: Vrinda PK; Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair, 744112, Andaman and Nicobar Islands, India., Amal R; School of Environmental Studies, Cochin University of Science and Technology, Kochi, India, 682022., Abhirami N; Department of Aquatic Environment Management, Central Institute of Fisheries Education, Versova, Mumbai, Maharashtra, 400061, India., Mini DA; Department of Aquatic Environment Management, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, 682508, Kerala, India., Kumar VJR; Department of Aquaculture, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, 682506, Kerala, India., Devipriya SP; School of Environmental Studies, Cochin University of Science and Technology, Kochi, India, 682022. devipriyasuja@cusat.ac.in.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Nov; Vol. 30 (54), pp. 114822-114843. Date of Electronic Publication: 2023 Nov 03.
DOI: 10.1007/s11356-023-30679-2
Abstrakt: Microplastics (MPs) and heavy metals are significant pollutants in the marine environment, necessitating effective remediation strategies to prevent their release into the sea through sewage and industrial effluent. This comprehensive review explores the current understanding of the co-exposure of MPs and heavy metal-enriched MPs, highlighting the need for effective remediation methods. Various mechanisms, including surface ion complexation, hydrogen bonding, and electrostatic forces, contribute to the adsorption of heavy metals onto MPs, with factors like surface area and environmental exposure duration playing crucial roles. Additionally, biofilm formation on MPs alters their chemical properties, influencing metal adsorption behaviors. Different thermodynamic models are used to explain the adsorption mechanisms of heavy metals on MPs. The adsorption process is influenced by various factors, including the morphological characteristics of MPs, their adsorption capacity, and environmental conditions. Additionally, the desorption of heavy metals from MPs has implications for their bioavailability and poses risks to marine organisms, emphasizing the importance of source reduction and remedial measures. Hybrid approaches that combine both conventional and modern technologies show promise for the efficient removal of MPs and heavy metals from marine environments. This review identifies critical gaps in existing research that should be addressed in future studies including standardized sampling methods to ensure accurate data, further investigation into the specific interactions between MPs and metals, and the development of hybrid technologies at an industrial scale. Overall, this review sheds light on the adsorption and desorption mechanisms of heavy metal-enriched MPs, underscoring the necessity of implementing effective remediation strategies.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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