Vytautas Magnus University Research Management System (VDU CRIS)
 
Use this url to cite publication: https://hdl.handle.net/20.500.12259/99225

Chelating extraction technology in removing and recovering heavy metals from municipal sludge

Type of publication
Straipsnis kitame recenzuojamame leidinyje / Article in other peer-reviewed edition (S5)
Author(s)
AuthorAffiliation
Paulauskas, Valdas
Aplinkos ir ekologijos katedra
LT
Zaleckas, Ernestas
Aplinkos ir ekologijos katedra
LT
Title
Chelating extraction technology in removing and recovering heavy metals from municipal sludge
[en]
Is part of
Machines. Technologies. Materials. Sofia : Scientific Technical Union of Mechanical Engineering "Industry 4.0", 2019, Vol. 13, iss. 3
Date Issued
Date
2019
Publisher
Sofia : Scientific Technical Union of Mechanical Engineering "Industry 4.0"
Extent
p. 114-117
URI
URI
https://stumejournals.com/journals/mtm/2019/3/114
https://hdl.handle.net/20.500.12259/99225
Field of Science
Keywords (en)
Abstract (en)

Comparable heavy metal extraction efficiency using different chelating aminopolycarboxylic acids was studied with sewage sludge as well as sludge-soil mixtures. EDDS and MGDA showed only slightly lower extraction efficiency in comparison with EDTA, at solution pH 6 and 25°C. Chemical fractions of HM in the sludge were determined using sequential extraction. According to their stability in the environment (in sulphide and residual fractions) the investigated heavy metals can be ranked as follows: Cr> Pb> Ni> Cd> Zn ≈ Cu. It was found out that methylglycinediacetic and S,S’-ethylenediaminedisuccinic acids had much better biological degradation properties than widely for metal complexation used ethylenediaminetetraacetic acid – EDTA. Possibility to utilize metal-contaminated extraction solution by chelant recovery with calcium hydrosilicate was also investigated.

Type of document
type::text::journal::journal article::research article
Language
Anglų / English (en)
Coverage Spatial
Bulgarija / Bulgaria (BG)
ISSN (of the container)
1313-0226
Other Identifier(s)
VDU02-000059848