Effects of co-modified biochar immobilized laccase on remediation and bacterial community of PAHs-contaminated soil.
J Hazard Mater
; 443(Pt B): 130372, 2023 02 05.
Article
in En
| MEDLINE
| ID: mdl-36444066
ABSTRACT
Considering the stability and economy of immobilized enzymes, this study prepared co-modified biochar immobilized laccase product named Fe3O4@NaBC@GA@LC via orthogonal experimental design and explored its possibility of remediating polycyclic aromatic hydrocarbons (PAHs) contaminated soil in steel plants. Compared with the free laccase treatment, the relative activity of Fe3O4@NaBC@GA@LC remained 60 % after 50 days of incubation at room temperature. The relative activity of Fe3O4@NaBC@GA@LC could still retain nearly 80 % after five reuses. In the process of simulating the PAHs-contaminated site treatment experiment in Hangzhou Iron and steel plant, immobilized laccase exhibited efficient adsorption and degradation performances and even the removal rate of 5-ring PAHs reached more than 90 % in 40 days, resulting in improving urease activity and dehydrogenase in the soil and promoted the growth of a PAH degrading bacteria (Massilia). Our results further explained the efficient degradation effects of Fe3O4@NaBC@GA@LC on PAHs, which make it a promising candidate for PAHs-contaminated soil remediation.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polycyclic Aromatic Hydrocarbons
Language:
En
Journal:
J Hazard Mater
Year:
2023
Document type:
Article