Simultaneous ozone and granular activated carbon for advanced treatment of micropollutants in municipal wastewater effluent.
Chemosphere
; 234: 845-854, 2019 Nov.
Article
em En
| MEDLINE
| ID: mdl-31247495
ABSTRACT
The main objective of this study was to compare the efficacy of ozone (O3) and O3 with granular activated carbon (GAC) (O3/GAC) at pilot-scale for the enhanced removal of micropollutants (MPs) from wastewater effluent. The results revealed enhanced removal of tris (2-carboxylethyl) phosphine (TCEP), sucralose, and meprobamate during the O3/GAC treatment experiments compared to the sum of their removal during isolated ozonation and GAC adsorption experiments. The long-term O3/GAC experiment showed the promotive effect of GAC substantially decreased after 20â¯h of O3 exposure. This decreased performance correlates with changes to GAC surface properties caused by O3. After 6â¯h of operation, O3 initially led to an increase in Brunauer-Emmett-Teller (BET) surface area on the GAC improving the elimination level of investigated MPs (except N-nitrosomorpholine (NMOR)). However, after 20â¯h of exposure, O3 ultimately caused structural damages to the GAC surface, decreased the BET surface area in the final stages of the experiment, and a 4-fold increase in O1sC1s ratio on the GAC surface was observed due to an increase in surface acidic functional groups caused by O3 treatment.
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Texto completo:
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ozônio
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Poluentes Químicos da Água
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Carvão Vegetal
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Purificação da Água
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Águas Residuárias
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2019
Tipo de documento:
Article