Gravity-driven membrane system treating heavy metals-containing secondary effluent: Improved removal of heavy metals and mechanism.
Biocake layer
Gravity-driven membrane (GDM)
Heavy metal
Iron and manganese
Secondary effluent
Journal
Chemosphere
ISSN: 1879-1298
Titre abrégé: Chemosphere
Pays: England
ID NLM: 0320657
Informations de publication
Date de publication:
Oct 2023
Oct 2023
Historique:
received:
02
04
2023
revised:
16
07
2023
accepted:
19
07
2023
medline:
24
8
2023
pubmed:
23
7
2023
entrez:
22
7
2023
Statut:
ppublish
Résumé
This study aimed at investigating the removal performance of the gravity-driven membrane (GDM) system in treating the heavy metals-containing secondary effluent, as well as evaluating the respective roles of Fe and Mn addition on the removal of heavy metals. GDM process with the formation of biocake layer exerted effective removals of Cr, Pb and Cd, with an average removal efficiency of 98%, 95% and 40%, respectively, however, after removing the biocake layer, the removal efficiencies of Cr, Pb and Cd reduced to 59%, 85% and 19%, respectively, indicating that the biocake layer played a fundamental role in removing heavy metals. With the assistance of Fe, the removal efficiency of heavy metals increased, and exhibited a positive response to the Fe dosage, due to the adsorption by the freshly generated iron oxides. On the contrary, the Mn involvement would result in the reduction of Cd removal due to the competitive adsorption of residual dissolved Mn
Identifiants
pubmed: 37480959
pii: S0045-6535(23)01857-X
doi: 10.1016/j.chemosphere.2023.139590
pii:
doi:
Substances chimiques
Cadmium
00BH33GNGH
Lead
2P299V784P
Metals, Heavy
0
Wastewater
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
139590Informations de copyright
Copyright © 2023. Published by Elsevier Ltd.
Déclaration de conflit d'intérêts
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.