Decomposition of oil refinery sludge using E+-Ozonation process for carbon source releasing and TPH removal.
Environ Sci Pollut Res Int
; 28(21): 26913-26922, 2021 Jun.
Article
em En
| MEDLINE
| ID: mdl-33496952
ABSTRACT
To utilize carbon source and decompose the petroleum hydrocarbon substances simultaneously, adding the electrolysis to ozonation (E+-Ozonation) was employed to deal with hazardous activated petroleum waste sludge (P-sludge). It was found that E+-Ozonation could accelerate the ozone utilization and hydroxyl radical (·OH) generation rate. Soluble chemical oxygen demand (SCOD) increased around 16.3 times than the control one (from 471 to 7700 mg/L). The potential carbon source, such as the short-chain carbon of acetate and propionate, increased from 50 to 1088 mg/L and from 27 to 614 mg/L respectively, and approximately accounted for a quarter of total SCOD. Total petroleum hydrocarbon (TPH) decomposition was observed with a much higher removal rate of 84.3% simultaneously, and the substances with the function group of C=C and C-C bonds decomposed greatly. The long- and medium-chain substances in TPH were converted into the short-chain substances (90% of C28-C40 of hydrocarbons was removed, while C10-C18 increased by 13.8%). E+-Ozonation process could be one of the promising methods for P-sludge decomposition through carbon source releasing and TPH removal.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Ozônio
/
Petróleo
Idioma:
En
Revista:
Environ Sci Pollut Res Int
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China