Bioremediation of a polymetallic, arsenic-dominated reverse osmosis reject stream.
Lett Appl Microbiol
; 75(5): 1084-1092, 2022 Nov.
Article
em En
| MEDLINE
| ID: mdl-34608662
ABSTRACT
The treatment of metal-laden industrial effluents by reverse osmosis is gaining in popularity worldwide due to its high performance. However, this process generates a polymetallic concentrate (retentate) stream in need of efficient post-treatment prior to environmental discharge. This paper presents results on the bioremediation (in batch mode) of a metal-laden, arsenic-dominated retentate using Shewanella sp. O23S as inoculum. The incubation of the retentate for 14 days under anoxic conditions resulted in the following removal yields As (8%), Co (11%), Mo (3%), Se (62%), Sb (30%) and Zn (40%). The addition of 1 mmol l-1 cysteine increased the removal rate as follows As (27%), Co (80%), Mo (78%), Se (88%), Sb (83%) and Zn (90%). The contribution of cysteine as a source of H2 S to enhancing the removal yield was confirmed by its addition after 7 days of incubations initially lacking it. Additionally, the cysteine-sourced H2 S was confirmed by its capture onto headspace-mounted Pb-acetate test strips that were analysed by X-ray diffraction. We show that real metal-laden industrial effluents can be treated to medium-to-high efficiency using a biological system (naturally sourced inocula) and inexpensive reagents (yeast extract, lactate and cysteine).
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Arsênio
/
Purificação da Água
Idioma:
En
Revista:
Lett Appl Microbiol
Assunto da revista:
MICROBIOLOGIA
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Polônia