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Salinity and temperature influence removal levels of heavy metals and chloride from water by wetland plants
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.ORCID iD: 0000-0001-5477-1562
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.ORCID iD: 0000-0002-1294-2615
Number of Authors: 22023 (English)In: Environmental Science and Pollution Research, ISSN 0944-1344, E-ISSN 1614-7499, no 30, p. 58030-58040Article in journal (Refereed) Published
Abstract [en]

Stormwater with low temperatures and elevated salinity, common in areas where deicing salt is used, might affect the removal of heavy metals by plants in stormwater treatment systems such as floating treatment wetlands. This short-term study evaluated the effects of combinations of temperature (5, 15, and 25 °C) and salinity (0, 100, and 1000 mg NaCl L−1) on the removal of Cd, Cu, Pb, and Zn (1.2, 68.5, 78.4, and 559 μg L−1) and Cl (0, 60, and 600 mg Cl L−1) by Carex pseudocyperusC. riparia, and Phalaris arundinacea. These species had previously been identified as suitable candidates for floating treatment wetland applications. The study found high removal capacity in all treatment combinations, especially for Pb and Cu. However, low temperatures decreased the removal of all heavy metals, and increased salinity decreased the removal of Cd and Pb but had no effect on the removal of Zn or Cu. No interactions were found between the effects of salinity and of temperature. Carex pseudocyperus best removed Cu and Pb, whereas P. arundinacea best removed Cd, Zu, and Cl. The removal efficacy for metals was generally high, with elevated salinity and low temperatures having small impacts. The findings indicate that efficient heavy metal removal can also be expected in cold saline waters if the right plant species are used.

Place, publisher, year, edition, pages
2023. no 30, p. 58030-58040
Keywords [en]
Salinity, Temperature, Wetland plants, Heavy metals, Chloride, Phytodesalination
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-218043DOI: 10.1007/s11356-023-26490-8ISI: 000983801400021PubMedID: 36977875Scopus ID: 2-s2.0-85151142949OAI: oai:DiVA.org:su-218043DiVA, id: diva2:1784301
Available from: 2023-07-26 Created: 2023-07-26 Last updated: 2023-10-09Bibliographically approved

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Schück, MariaGreger, Maria

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