Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/103687
Type of publication: Straipsnis konferencijos medžiagoje kitose duomenų bazėse / Article in conference proceedings in other databases (P1c)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Paulauskas, Valdas;Zaleckas, Ernestas;Karnaukh, Oleksandr
Title: Biodegradable chelants for heavy metal removal from sludge and soil - sludge mixtures
Is part of: Rural development 2019 : research and innovation for bioeconomy (RD2019) [elektroninis išteklius] : 9th international scientific conference, September 26-28, 2019, Agriculture Academy of Vytautas Magnus University. Akademija : Agriculture Academy of Vytautas Magnus University
Extent: p. 1-6
Date: 2019
Note: Edited by prof. Asta Raupelienė
Keywords: Heavy metals;Removal;Sewage sludge;Chelants;Biodegradability
Abstract: Heavy metal extraction study was performed using five chelating agents with different biodegradability : EDTA, EDDS, MGDA, SCLC and citric acid. Aminopolycarboxylic acids EDDS and MGDA showed high hea vy metal extraction capability from sewage sludge and sludge - soil mixtures. According to heavy metal removal efficiency investigated chelants can be ranked in the following order: EDTA≈ EDDS≈ MGDA> CA> SCLC. Extraction efficiency from sludge mixture s with clay soil was markedly lower than from the mixture s with sandy soil. Biodegradability of EDTA, MGDA, EDDS and CA was evaluated measuring BOD in water environment over 28 day period. According to the results of biodegradability test after 28 days the ranking order of the chelants was following: EDDS (99%)> CA (32.4%)> MGDA (29.2%)> EDTA (14. 9%). Results showed that significantly easier than EDTA biodegradable chelating agents, such as EDDS and MGDA, can be successfully used for heavy metal removal from sewage sludge as well as metal - contaminated soil
Internet: https://ejournals.vdu.lt/index.php/rd/article/view/777/652
Affiliation(s): Miškų ir ekologijos fakultetas
Proj. "Vilko ekologijos tyrimai"
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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