Transformation of hexabromocyclododecane in contaminated soil in association with microbial diversity

[Display omitted] •HBCD degradation was investigated under anaerobic and aerobic conditions.•Soil components, especially humic acid, and glucose affect to HBCD remediation.•Degradation of HBCD in rhizosphere soil was effective under aerobic conditions.•Gram-negative microbes were stimulated during a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2017-03, Vol.325, p.82-89
Main Authors: Le, Thao Thanh, Son, Min-Hui, Nam, In-Huyn, Yoon, Hakwon, Kang, Yu-Gyeong, Chang, Yoon-Seok
Format: Article
Language:English
Subjects:
Bacteria
Bioremediation
Brassia
Glucose
HBCD
Humic acid
Humic acids
Microbial activity
Microorganisms
Soil
Soil (material)
Soil conditions
Soil contamination
Sphingomonas
Transformations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •HBCD degradation was investigated under anaerobic and aerobic conditions.•Soil components, especially humic acid, and glucose affect to HBCD remediation.•Degradation of HBCD in rhizosphere soil was effective under aerobic conditions.•Gram-negative microbes were stimulated during aerobic degradation of HBCD. This study evaluated the transformation of 1,2,5,6,9,10-hexabromocyclododecane (HBCD) in soil under various conditions. Under anaerobic conditions for 21days, 34% of the total HBCD was reduced from rhizosphere soil containing humic acid, and 35% of the total HBCD was reduced from the non-rhizosphere soil; under aerobic conditions, 29% and 57–60% of the total HBCD were reduced from the same soil types after 40days. Three HBCD isomers (α-, β-, and γ-HBCD) were separately analyzed for their isomeric effects on transformation. In the soils with added glucose as a carbon and energy source, the fraction of γ-HBCD was reduced due to the blooming microbial activity. The population of Gram-positive bacteria decreased during the aerobic treatments of HBCD, whereas the population of several Gram-negative bacteria (e.g., Brassia rhizosphere, Sphingomonas sp.) increased. Humic acid and glucose increased the HBCD removal efficiency and microbial diversity in both rhizosphere and non-rhizosphere soils.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2016.11.058