Use of selected amendments for reducing metal mobility and ecotoxicity in contaminated bottom sediments.

Autor: Baran A; Department of Agricultural and Environmental Chemistry, University of Agricultural in Krakow, Al. Mickiewicza 21, 31-120 Kraków, Poland. Electronic address: Agnieszka.Baran@urk.edu.pl., Tack FG; Department of Green Chemistry and Technology, Ghent University, Gent, Belgium. Electronic address: Filip.Tack@UGent.be., Delemazure A; Department of Green Chemistry and Technology, Ghent University, Gent, Belgium. Electronic address: Antoine.Delemazure@ugent.be., Wieczorek J; Department of Agricultural and Environmental Chemistry, University of Agricultural in Krakow, Al. Mickiewicza 21, 31-120 Kraków, Poland. Electronic address: Jerzy.Wieczorek@urk.edu.pl., Boguta P; Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland. Electronic address: p.boguta@ipan.lublin.pl., Skic K; Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland. Electronic address: k.skic@ipan.lublin.pl.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Jun; Vol. 360, pp. 121183. Date of Electronic Publication: 2024 May 25.
DOI: 10.1016/j.jenvman.2024.121183
Abstrakt: The aims of the study were 1) to assess the suitability of selected amendments for reducing the mobility of metals in sediments by evaluating their effects on metal sorption capacity, and 2) to assess the ecotoxicity of sediment/amendment mixtures. Three different amendments were tested: cellulose waste, biochar, and dolomite. The efficiency of metal immobilization in mixtures was dependent on pH, which increased with concentrations of amendment. The higher negative charge observed for dolomite and cellulose waste corresponded with greater attraction of cations and enhanced metal sorption. For cellulose waste, the highest values of the Q parameter were attributed to the presence of OH groups, which corresponded with the highest immobilization of metals. Biochar reduced the negative surface charge, which highlights the importance of additional factors such as high specific surface area and volume of pores in metal immobilization. All amendments increased the SSA and V N2 , indicating a higher number of sorption sites for metal immobilization. Most bioassays established a reduction of the ecotoxicity for amendments. Mixtures with dolomite (25%, 45% doses) and biochar (45% dose) were low toxic. Mixtures with cellulose waste were toxic or highly toxic. The mobility of metals from contaminated sediments can be limited by reused industry side products, which could contribute to further closing the circular economy loop.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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