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Mechanism of microplastics effects on the purification of heavy metals in piggery effluents by microalgae

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Názov: Mechanism of microplastics effects on the purification of heavy metals in piggery effluents by microalgae
Autori: Huimin Wang, Longzao Luo, Binghua Yan, Shuang Luo
Zdroj: Wang, H, Luo, L, Yan, B & Luo, S 2024, 'Mechanism of microplastics effects on the purification of heavy metals in piggery effluents by microalgae', Environmental Pollution, vol. 351, 124028. https://doi.org/10.1016/j.envpol.2024.124028
Informácie o vydavateľovi: Elsevier BV, 2024.
Rok vydania: 2024
Predmety: Swine, Microplastics, Waste Disposal, Fluid/methods, 0211 other engineering and technologies, 02 engineering and technology, Wastewater, Waste Disposal, Fluid, 01 natural sciences, 6. Clean water, Piggery wastewater, Water Pollutants, Chemical/metabolism, Biodegradation, Environmental, Heavy metals, Metals, Heavy, Wastewater/chemistry, Microalgae, Animals, Microalgae/metabolism, Metals, Heavy/metabolism, Water Pollutants, Chemical, 0105 earth and related environmental sciences
Popis: Microalgae is an effective bioremediation technique employed for treating piggery effluent. However, there is insufficient study on how the presence of microplastics (MPs) in wastewater affects the ability of microalgae to remove heavy metals from piggery effluent. This study aims to investigate the influence of two prevalent heavy metals found in piggery wastewater, Cu2+ (2 mg/L) and Zn2+ (2 mg/L), on their removal by microalgae (Desmodesmus sp. CHX1) in the presence of four types of MPs: polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), and polyethylene terephthalate (PET). The results revealed that smaller particle size MPs promoted chlorophyll accumulation, while larger particles inhibits it. Additionally, higher concentrations of MPs promoted chlorophyll accumulation, while lower concentrations inhibited it. As for heavy metals, the presence of microplastics reduced the removal efficiency of Cu2+ and Zn2+ by Desmodesmus sp. CHX1. The highest inhibition of Cu2+ was 30%, 10%, 19%, and 16% of the control (CK), and the inhibition of Zn2+ was 7%, 4%, 4%, and 13%, respectively, under the treatments of PE, PVC, PP and PET MPs. Furthermore, Desmodesmus sp. CHX1 can secrete more extracellular polymeric substances (EPS) and form heterogeneous aggregates with MPs to counteract their pressure. These findings elucidate the impact of MPs on microalgae in bioremediation settings and offer useful insights into the complex relationships between microalgae, MPs, and heavy metals in the environment.
Druh dokumentu: Article
Jazyk: English
ISSN: 0269-7491
DOI: 10.1016/j.envpol.2024.124028
Prístupová URL adresa: https://pubmed.ncbi.nlm.nih.gov/38677456
Rights: Elsevier TDM
Prístupové číslo: edsair.doi.dedup.....903bbbc3388f6ac37badee42d164d85d
Databáza: OpenAIRE
Popis
Abstrakt:Microalgae is an effective bioremediation technique employed for treating piggery effluent. However, there is insufficient study on how the presence of microplastics (MPs) in wastewater affects the ability of microalgae to remove heavy metals from piggery effluent. This study aims to investigate the influence of two prevalent heavy metals found in piggery wastewater, Cu2+ (2 mg/L) and Zn2+ (2 mg/L), on their removal by microalgae (Desmodesmus sp. CHX1) in the presence of four types of MPs: polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), and polyethylene terephthalate (PET). The results revealed that smaller particle size MPs promoted chlorophyll accumulation, while larger particles inhibits it. Additionally, higher concentrations of MPs promoted chlorophyll accumulation, while lower concentrations inhibited it. As for heavy metals, the presence of microplastics reduced the removal efficiency of Cu2+ and Zn2+ by Desmodesmus sp. CHX1. The highest inhibition of Cu2+ was 30%, 10%, 19%, and 16% of the control (CK), and the inhibition of Zn2+ was 7%, 4%, 4%, and 13%, respectively, under the treatments of PE, PVC, PP and PET MPs. Furthermore, Desmodesmus sp. CHX1 can secrete more extracellular polymeric substances (EPS) and form heterogeneous aggregates with MPs to counteract their pressure. These findings elucidate the impact of MPs on microalgae in bioremediation settings and offer useful insights into the complex relationships between microalgae, MPs, and heavy metals in the environment.
ISSN:02697491
DOI:10.1016/j.envpol.2024.124028