Spatial Changes of Redox Environment in Aquifer Contaminated by BTEX
Su Yan,Sun Chao,Zhao Yongsheng,Zhou Rui,Wang Xiao and Sheng He
DOI:10.11835/j.issn.1674-4764.2014.02.020
Received October 25, 2013,Revised , Accepted , Available online July 01, 2015
Volume ,2014,Pages 126-130
- Abstract
The changes of redox environment conditions and the concentrations of BTEX in different conditions are monitored in this study through setting simulated column. The results showed that the concentration of redox components presented zoning in the simulated column. Oxygen reduction zone formatted in 80～98 cm away from the source， Nitrate reduction zone formatted in 60～80 cm， Iron reduction zone formatted in 35～60 cm， and Sulfate reduction zone formatted in 30～50 cm. At the bottom of the column, the methane zone formatted in 0～30 cm because of the decreasing of HCO3-. The concentration of BTEX components showed a sharp decline. The degradation rates of benzene, toluene, ethylbenzene, xylene and o-xylene reached 99.94%, 99.96%, 99.94%, 99.49% and 98.3%, respectively.