Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Research on Microbes
Microbiology Experts
Online Submission
Access Statistics

Site Visitors

blog tracking

Letters in Applied Microbiology
xx, No. xx, 2012; Pages: xxx - xxx

Effect of salinity on the bioremediation of petroleum hydrocarbons in a saline alkaline soil

Qin X, Tang J, Li D, Zhang Q

Tianjin Key Laboratory of Environmental Remediation Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University Tianjin, 300071, China. College of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300071, China.


Aims: The aim of this paper is to check the effect of salinity on the bioremediation process of petroleum hydrocarbons in the saline alkaline in this study; soil salinity was adjusted to soil.
Methods and Results: different levels by water leaching method and the bioremediation process was conducted for 28 d. Soil pH increased after leaching and decreased during bioremediation process. At initial time, moderate salinity enhanced the biodegradation and addition of microbial consortium was not effective in enhancing degradation rate of petroleum hydrocarbons. At day of 28 d, higher degradation rate was found in treatments with more leaching times with a maximum value of 42.36%. Dehydrogenase activity increased with the progress of bioremediation and positive correlation was found between dehydrogenase activity and degradation rate of petroleum hydrocarbons. Denaturing gradient gel electrophoresis (DGGE) analysis result showed decreased microbial. The community diversity with increased salt content.
Conclusions: result suggested that salinity had great impact on bioremediation, and leaching and addition of inoculated consortium were effective in enhancing biodegradation of petroleum hydrocarbons in the result saline-alkaline soil.
Significance and Impact of the Study: of this study is important for understanding the bioremediation process of petroleum in contaminated soil. New remediation method of petroleum contaminated soil can be developed based on this study.

Keywords: Bioremediation; Soil; Salinity; Petroleum hydrocarbons; Dehydrogenase.



Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution