In:
Canadian Journal of Microbiology, Canadian Science Publishing, Vol. 61, No. 9 ( 2015-09), p. 691-699
Kurzfassung:
Benzene, toluene, ethylbenzene, and xylene (BTEX) are of great environmental concern because of their widespread occurrence in groundwater and soil, posing an increasing threat to human health. The aerobic denitrifying BTEX-degrading bacterium Pseudomonas thivervalensis MAH1 was isolated from BTEX-contaminated sediment under nitrate-reducing conditions. The degradation rates of benzene, toluene, ethylbenzene, and xylene by strain MAH1 were 4.71, 6.59, 5.64, and 2.59 mg·L −1 ·day −1 , respectively. The effects of sodium citrate, nitrate, and NaH 2 PO 4 on improving BTEX biodegradation were investigated, and their optimum concentrations were 0.5 g·L −1 , 100 mg·L −1 , and 0.8 mmol·L −1 , respectively. Moreover, MAH1, which has nirS and nosZ genes, removed ammonium, nitrate, and nitrite at 2.49 mg NH 4 + -N·L −1 ·h −1 , 1.50 mg NO 3 − -N·L −1 ·h −1 , and 0.83 mg NO 2 − -N·L −1 ·h −1 , respectively. MAH1 could help in mitigating the pollution caused by nitrogen amendments for biostimulation. This study highlighted the feasibility of using MAH1 for the bioremediation of BTEX-contaminated sites.
Materialart:
Online-Ressource
ISSN:
0008-4166
,
1480-3275
DOI:
10.1139/cjm-2015-0152
Sprache:
Englisch
Verlag:
Canadian Science Publishing
Publikationsdatum:
2015
ZDB Id:
280534-0
ZDB Id:
1481972-7
SSG:
12
Permalink
