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Lab-Scale Experiment of Influence on Shallow Groudwater by BTEX in Polluted River(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2007年第01期
Page:
70-74
Research Field:
Publishing date:

Info

Title:
Lab-Scale Experiment of Influence on Shallow Groudwater by BTEX in Polluted River
Author(s):
LI Zhi-ping1CHEN Xiao-gang1HAO Shi-long 1SHEN Zhao-li2
1. Department ofGeotechnical Engineering, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008, Henan, China; 2. Schoolof Water Resource and Environmental Engineering, China University ofGeosciences, Beijing 100083, China
Keywords:
polluted river BTEX groundwater
PACS:
P69
DOI:
-
Abstract:
To research the influence of BTEX in polluted river on shallow groundwater, in the lab-scale experiment, three kinds of natural sand were chosen as infiltration medium, and polluted rivers were simulated by domestic sewage. After 68 days, it was found that the removal ratios of benzene, toluene and total BTEX are 32. 06%, 21.39% and 27.13% in coarse sand, and in two kinds of medium sand are 76.26%, 81.40% and 87. 99% in column 2, 68.94%,74.41% and 81.69% in column 3. The removal ratio of total BTEX in column 2 is the greatest due to the largest clay material content. The concentration of BTEX decreased with depth. The removal of BTEX mainly occurred in the 0.4 m under the ground. The changes of hydrodynamic characteristics influence the migration and transformation of pollutants. The removal mechanism of BTEX are volatilization, adsorption and biodegradation. Anaerobic microorganism degradation is dominant.

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