An improved two-dimensional visualization device was used to study the zone of influence (ZOI) and the airflow distribution when the surfactant (SDBS) was added to the aquifer. The experimental results indicated that the addition of surfactant would increase the sparging pressure in the same media under the same airflow rate. The addition of surfactant greatly improved the air saturation, however, the mechanism was different under different medium. When airflow rate was 1000L/h, the sparging area of coarse sand (channel flow) and gravel (bubbly flow) increased 21.8% and 5.2% respectively by adding the surfactant to the aquifer. This showed that the smaller medium size was, the more obvious sprging area increased. Under same airflow rate, the airflow distribution range of coarse media became larger and the airflow distribution curve was relatively flat gently, while the airflow distribution range of gravel media was little changed and the airflow distribution curve was relatively abrupt when SDBS was added in the aquifer. Under different airflow rate, the airflow distribution showed significantly similar rule within the ZOI.
常月华, 姚猛, 赵勇胜. 表面活性剂强化原位空气扰动修复实验研究——影响区域及气流分布变化规律[J]. 中国环境科学, 2018, 38(7): 2585-2592.
CHANG Yue-hua, YAO Meng, ZHAO Yong-sheng. Laboratory study of surfactant-enhanced air sparging remediation-The variation rule of the influence of zone and airflow distribution. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2585-2592.
Ben A N, Paster A. Applying short-duration pulses as a mean to enhance volatile organic compounds removal by air sparging.[J]. Journal of Contaminant Hydrology, 2017,205:96-106.
[5]
Bass D H, Hastings N A, Brown R A. Performance of air sparging systems:a review of case studies[J]. Journal of hazardous materials, 2000,72(2/3):101-109.
[6]
Hu L M, Wu X F, Yan L, et al.. Physical modeling of air flow during air sparging remediation[J]. Environmental Science & Technology, 2010, 44(10):3883-3888.
[7]
And S E B, Zhang M. Effects of System Parameters on the Physical Characteristics of Bubbles Produced through Air Sparging[J]. Environmental Science & Technology, 2001,35(1):204-208.
[8]
Yao M, Kang X H, Zhao Y S, et al.. A mechanism study of airflow rate distribution within the zone of influence during air sparging remediation[J]. Science of the Total Environment, 2017,609:377-384.
[9]
Adams J A, Reddy K R. Removal of Dissolved-and Free-Phase Benzene Pools from Ground Water Using In Situ Air Sparging[J]. Journal of Environmental Engineering, 2000,126(8):697-707.
[10]
Song X L, Zhao Y S, Wang H F, et al. Predictive models and airflow distribution associated with the zone of influence (ZOI) during air sparging remediation[J]. Science of the Total Environment, 2015,537:1-8.
[11]
Hu L M, Meegoda J N, DuJ F, et al. Centrifugal study of zone of influence during air-sparging[J]. Journal of Environmental Monitoring Jem, 2011,13(9):2443-2449.
[12]
Reddy K R, Adams J A. System effects on benzene removal from saturated soils and ground water using air sparging[J]. Journal of Environmental Engineering, 1998,124(3):288-299.
[13]
Ji, Amine, Ahlfeld D P, et al. Laboratory Study of Air Sparging:Air Flow Visualization[J]. Ground Water Monitoring & Remediation, 1993, 13(4):115-126.
[14]
Neriah A B, Paster A. Effect of Temporal Changes in Air Injection Rate on Air Sparging Performance Groundwater Remediation[J]. Ground Water, 2016,54(6):851-860.
[15]
Nyer E K, Suthersan S S. Air Sparging:Savior of Ground Water Remediations or just Blowing Bubbles in the Bath Tub[J]. Ground Water Monitoring & Remediation, 1993,13(4):87-91.
[16]
Mccray J E, Falta R W. Numerical Simulation of Air Sparging for Remediation of NAPL Contamination[J]. Groundwater, 1997,35(1):99-110.
[17]
Reddy K R, Adams J. Conceptual modeling of air sparing for groundwater remediation[C]//Proceedings of the 9th international symposium on environmental geotechnology and global sustainable development, Hong Kong. 2008:18.
[18]
Ahlfeld D P, Dahmani A, Wei J. A conceptual model of field behavior of air sparging and its implications for application[J]. Ground Water Monitoring & Remediation, 1994,14(14):132-139.
[19]
Kim H, Kim T, Shin S, et al. Measurement of air and VOC vapor fluxes during gas-driven soil remediation:Bench-scale experiments[J]. Environmental Science & Technology, 2012,46(17):9533-9540.
Qin C Y, Zhao Y S, Zheng W. The influence zone of surfactant-enhanced air sparging in different media[J]. Environmental Technology, 2014,35(10):1190-1198.
[24]
Kim H, Soh H E, Annable M D, et al. Surfactant-enhanced air sparging in saturated sand[J]. Environmental science & technology, 2004,38(4):1170-1175.
[25]
Kim J, Kim H, Annable M D. Changes in air flow patterns using surfactants and thickeners during air sparging:Bench-scale experiments[J]. Journal of Contaminant Hydrology, 2015,172:1-9.
[26]
Kim H, Ahn D, Annable M D. Enhanced removal of VOCs from aquifers during air sparging using thickeners and surfactants:Bench-scale experiments[J]. Journal of Contaminant Hydrology, 2016,184(5):25.
