An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China
The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-11-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/7/11/394 |
| _version_ | 1818616601392447488 |
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| author | Wensi Zhang Xiao Wang Baolin Liu |
| author_facet | Wensi Zhang Xiao Wang Baolin Liu |
| author_sort | Wensi Zhang |
| collection | DOAJ |
| description | The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, which were collected from the coastal zone adjacent to Tianjin Port in Bohai Bay. The sequential extraction procedure was applied to identify the mobility of metals and, further, to evaluate the immobilization effect of the amendments. The physical−chemical properties of the sediments, such as the pH, electrical conductivity (EC), salinity, and total organic carbon (TOC), were also measured to better understand their influence on the three metals’ mobility. The results of the sequential extraction procedure indicated that the mobile fractions of the metals were converted into relatively stable fractions because of the two amendments. In addition, the EC, salinity, and TOC decreased moderately, while no obvious variations in the pH of the sediments were observed with the addition of kaolinite and limestone. It was confirmed that both kaolinite and limestone can effectively reduce the mobility and bioavailability of metals, particularly Zn, and limestone generally has a better immobilization effect, compared with kaolinite. |
| first_indexed | 2024-12-16T16:52:24Z |
| format | Article |
| id | doaj.art-8e27da7329b44e6c904598566744c8b0 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-12-16T16:52:24Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-8e27da7329b44e6c904598566744c8b02022-12-21T22:23:59ZengMDPI AGJournal of Marine Science and Engineering2077-13122019-11-0171139410.3390/jmse7110394jmse7110394An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, ChinaWensi Zhang0Xiao Wang1Baolin Liu2School of Marine Sciences, China University of Geosciences (Beijing), Beijing 100083, ChinaSchool of Marine Sciences, China University of Geosciences (Beijing), Beijing 100083, ChinaSchool of Marine Sciences, China University of Geosciences (Beijing), Beijing 100083, ChinaThe remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, which were collected from the coastal zone adjacent to Tianjin Port in Bohai Bay. The sequential extraction procedure was applied to identify the mobility of metals and, further, to evaluate the immobilization effect of the amendments. The physical−chemical properties of the sediments, such as the pH, electrical conductivity (EC), salinity, and total organic carbon (TOC), were also measured to better understand their influence on the three metals’ mobility. The results of the sequential extraction procedure indicated that the mobile fractions of the metals were converted into relatively stable fractions because of the two amendments. In addition, the EC, salinity, and TOC decreased moderately, while no obvious variations in the pH of the sediments were observed with the addition of kaolinite and limestone. It was confirmed that both kaolinite and limestone can effectively reduce the mobility and bioavailability of metals, particularly Zn, and limestone generally has a better immobilization effect, compared with kaolinite.https://www.mdpi.com/2077-1312/7/11/394dredged marine sedimentmetalimmobilizationkaolinitelimestone |
| spellingShingle | Wensi Zhang Xiao Wang Baolin Liu An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China Journal of Marine Science and Engineering dredged marine sediment metal immobilization kaolinite limestone |
| title | An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China |
| title_full | An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China |
| title_fullStr | An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China |
| title_full_unstemmed | An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China |
| title_short | An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China |
| title_sort | ex situ immobilization experiment with zn pb and cu in dredged marine sediments from bohai bay china |
| topic | dredged marine sediment metal immobilization kaolinite limestone |
| url | https://www.mdpi.com/2077-1312/7/11/394 |
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