Mobilisation of Cd, Mn, and Zn in floodplains by action of plants and its consequences for spreading historical contamination and fluvial geochemistry

0567570 - ÚACH 2024 RIV DE eng J - Journal Article
Matys Grygar, Tomáš - Hošek, Michal - Elznicová, J. - Machová, I. - Kubát, K. - Adamec, S. - Tůmová, Štěpánka - Rohovec, Jan - Navrátil, Tomáš
Mobilisation of Cd, Mn, and Zn in floodplains by action of plants and its consequences for spreading historical contamination and fluvial geochemistry.
Environmental Science and Pollution Research. Roč. 30, č. 14 (2023), s. 40461-40477. ISSN 0944-1344. E-ISSN 1614-7499
R&D Projects: GA ČR(CZ) GA20-06728S
Institutional support: RVO:61388980 ; RVO:67985831
Keywords : Contaminant mobilisation * Heavy metals * Plants * River banks
OECD category: Environmental sciences (social aspects to be 5.7); Environmental sciences (social aspects to be 5.7) (GLU-S)
Impact factor: 5.8, year: 2022
Method of publishing: Limited access
https://link.springer.com/article/10.1007/s11356-022-25113-y

Cadmium, Mn, and Zn are mobilised by plants commonly growing in floodplains, most notably willows (Salix) and alder (Alnus). These plants accumulate unwanted elements (Cd) or excessive element concentrations (Mn, Zn) in their foliage, thus introducing them into the food web and enriching them in floodplain surface by litterfall. In floodplain of the Litavka River in Czechia, contaminated by historical mining activities, up to 100 mg kg−1 Cd and up to several thousand mg kg−1 Mn and Zn are present in willow leaves in autumn, probably close maxima for sustainable plant growth. Willows and alders show seasonal growth of their foliar Mn and Zn. The willow leaves showed Cd/Zn larger than contaminated fluvisol of the Litavka River. Senesced willow leaves thus contribute to spread of risk elements from historically contaminated floodplains back to river water even without the bank erosion. Alders and willows alter geochemical cycles of Cd, Mn, and Zn in fluvial systems and increase Cd/Zn and Mn/Fe concentration ratios and Cd and Mn concentrations in fluvially transported particles relative to global geochemical averages as well as relative to floodplain sediments. Willows, in particular Salix fragilis L., S. aurita L, and S. cinerea L are particularly important ˝plant pumps˝. Other common floodplain plants, such as bird cherry (Prunus padus L.) and herbaceous plants (common nettle, Urtica dioica L. and grasses, Poaceae) do not contribute to those phenomena.
Permanent Link: https://hdl.handle.net/11104/0341288


Research data: SpringerLink