Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities
Microplastics (MPs) and heavy metals are two major types of pollutants that interact with each other, but they are poorly understood. Polystyrene (PS) is one type of MPs that is often detected in aquatic environments. In this study, we examined the adsorption capacity and release rate of heavy metal...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2021.671802/full |
| _version_ | 1818669397008449536 |
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| author | Beta Susanto Barus Kai Chen Minggang Cai Rongmao Li Huorong Chen Cong Li Jun Wang Jun Wang Sha-Yen Cheng |
| author_facet | Beta Susanto Barus Kai Chen Minggang Cai Rongmao Li Huorong Chen Cong Li Jun Wang Jun Wang Sha-Yen Cheng |
| author_sort | Beta Susanto Barus |
| collection | DOAJ |
| description | Microplastics (MPs) and heavy metals are two major types of pollutants that interact with each other, but they are poorly understood. Polystyrene (PS) is one type of MPs that is often detected in aquatic environments. In this study, we examined the adsorption capacity and release rate of heavy metals with respect to different particle sizes of PS, heavy metals, initial heavy metal concentrations, and salinities. Virgin (new) PS with diameters of 20, 50, 130, and 250 μm was used in this study, and four heavy metals (lead, cadmium, copper, and zinc) were used. The results showed that larger PS particle sizes adsorbed more heavy metals even though it took longer to achieve equilibrium adsorption. An increase in heavy metal concentration caused the adsorption capacity (μg g–1) of PS particles to also increase, but the adsorption rate (%) decreased. Increased salinity of the heavy metal solution resulted in a slower adsorption time and a lower adsorption capacity and release rate from the surface of PS particles. Different heavy metals also had different adsorption capacities. Pb was consistently more highly adsorbed by MPs, followed by Cu, Zn, and Cd. Larger PS sizes released heavy metals faster than smaller PS sizes, and the amounts of heavy metals released were higher. The heavy metal with the highest release rate was Cd, followed by Pb, Cu, and Zn. Finally, our findings highlight the interactions between PS and heavy metals and strongly support that PS particles can act as vectors for heavy metals in aquatic systems. |
| first_indexed | 2024-12-17T06:51:33Z |
| format | Article |
| id | doaj.art-65b0052c10e7423eafd072b953bc6f67 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-17T06:51:33Z |
| publishDate | 2021-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-65b0052c10e7423eafd072b953bc6f672022-12-21T21:59:34ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452021-06-01810.3389/fmars.2021.671802671802Heavy Metal Adsorption and Release on Polystyrene Particles at Various SalinitiesBeta Susanto Barus0Kai Chen1Minggang Cai2Rongmao Li3Huorong Chen4Cong Li5Jun Wang6Jun Wang7Sha-Yen Cheng8Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung, TaiwanCollege of Earth and Ocean Sciences, Xiamen University, Xiamen, ChinaCollege of Earth and Ocean Sciences, Xiamen University, Xiamen, ChinaFisheries Resources Monitoring Center of Fujian Province, Fuzhou, ChinaFisheries Resources Monitoring Center of Fujian Province, Fuzhou, ChinaFisheries Resources Monitoring Center of Fujian Province, Fuzhou, ChinaCollege of Earth and Ocean Sciences, Xiamen University, Xiamen, ChinaDepartment of Marine Biology, Xiamen Ocean Vocational College, Xiamen, ChinaDepartment of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung, TaiwanMicroplastics (MPs) and heavy metals are two major types of pollutants that interact with each other, but they are poorly understood. Polystyrene (PS) is one type of MPs that is often detected in aquatic environments. In this study, we examined the adsorption capacity and release rate of heavy metals with respect to different particle sizes of PS, heavy metals, initial heavy metal concentrations, and salinities. Virgin (new) PS with diameters of 20, 50, 130, and 250 μm was used in this study, and four heavy metals (lead, cadmium, copper, and zinc) were used. The results showed that larger PS particle sizes adsorbed more heavy metals even though it took longer to achieve equilibrium adsorption. An increase in heavy metal concentration caused the adsorption capacity (μg g–1) of PS particles to also increase, but the adsorption rate (%) decreased. Increased salinity of the heavy metal solution resulted in a slower adsorption time and a lower adsorption capacity and release rate from the surface of PS particles. Different heavy metals also had different adsorption capacities. Pb was consistently more highly adsorbed by MPs, followed by Cu, Zn, and Cd. Larger PS sizes released heavy metals faster than smaller PS sizes, and the amounts of heavy metals released were higher. The heavy metal with the highest release rate was Cd, followed by Pb, Cu, and Zn. Finally, our findings highlight the interactions between PS and heavy metals and strongly support that PS particles can act as vectors for heavy metals in aquatic systems.https://www.frontiersin.org/articles/10.3389/fmars.2021.671802/fullpolystyreneadsorption capacityheavy metalrelease ratesalinity |
| spellingShingle | Beta Susanto Barus Kai Chen Minggang Cai Rongmao Li Huorong Chen Cong Li Jun Wang Jun Wang Sha-Yen Cheng Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities Frontiers in Marine Science polystyrene adsorption capacity heavy metal release rate salinity |
| title | Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities |
| title_full | Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities |
| title_fullStr | Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities |
| title_full_unstemmed | Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities |
| title_short | Heavy Metal Adsorption and Release on Polystyrene Particles at Various Salinities |
| title_sort | heavy metal adsorption and release on polystyrene particles at various salinities |
| topic | polystyrene adsorption capacity heavy metal release rate salinity |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2021.671802/full |
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