J4 ›› 2011, Vol. 41 ›› Issue (3): 831-839.

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Evaluation of In-Situ MNA Remediation Potential and Biodegradation Efficiency of Petroleum-Contaminated Shallow Groundwater

XIA Yu-bo1,2, YANG Yue-suo1,2,3, DU Xin-qiang1,2, YANG Ming-xing1,2   

  1. 1.College of Environment and Resources, Jilin University, Changchun130026|China;
    2.Key Laboratory of Groundwater Resources and Environment|Ministry of Education, Jilin University, Changchun130021|China;
    3.College of Earth and Ocean, Cardiff University, Cardiff CF10 3XQ|UK
  • Received:2010-06-16 Online:2011-05-26 Published:2011-05-26

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Abstract:

Monitored natural attenuation (MNA) can be used as a remediation technique with characteristics of high efficiency and low cost for contaminated site cleanup. The biodegradation of pollutants is an important function to natural attenuation processes. Based on the analysis of distribution and variations of total petroleum hydrocarbons (TPH) and electron acceptors at a petroleum contaminated site in NE China, the functional zones of microbial activities were determined. The remediation potential of in-situ MNA and the efficiency of biodegradation were estimated by using a mass flux approach. The results showed that biodegradation was taking place in groundwater at this petroleum contaminated site. According to the different electron acceptors, the biodegradation function can be divided into manganese reduction zone, iron reduction zone and sulfate reduction zone. The mass flux model results showed that the biodegradation function was increasing with time at upstream area, and was reducing at downstream area within the contaminant plume. During the monitoring period, 394 kg of total petroleum hydrocarbons was attenuated. The most essential process of MNA is biodegradation, with contribution rate of about 64%-93% and the biodegradation flux rate was about 0.18 to 0.73 kg/d at each control profile. MNA can be introduced into petroleum-contaminated site as an effective solution to remove petroleum contamination.

Key words: biodegradation, monitored natural attenuation, petroleum-contaminated site, in-site remediation, groundwater

CLC Number: 

  • X523
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