[1] Wang Yajun, Dong Wantao, Chen Tianjing, et al. In-situ remediation of deep petroleum-contaminated soil injection [J]. Journal of Southeast University (English Edition), 2021, 37 (4): 394-400. [doi:10.3969/j.issn.1003-7985.2021.04.008]

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In-situ remediation of deep petroleum-contaminated soil injection()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 4

Page:

394-400

Research Field:

Environmental Science and Engineering

Publishing date:

2021-12-20

Info

Title:

In-situ remediation of deep petroleum-contaminated soil injection

Author(s):

Wang Yajun¹;  2;  Dong Wantao¹;  Chen Tianjing¹;  Li Li³Zhang Yurong¹;  Xu Shenghui¹;  Fu Dafang¹;  2

¹School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730000, China
²SEU-Monash Joint Research Center for Future Cities, Suzhou 215123, China
³China Railway Research Institute Co., Ltd. Chengdu Branch, Chengdu 610000, China

Keywords:

in-situ chemical oxidation;  high-pressure jet;  total petroleum hydrocarbons;  remediation of contaminated soil;  computational fluid dynamics(CFD)numerical simulation

PACS:

X53

DOI:

10.3969/j.issn.1003-7985.2021.04.008

Abstract:

A computational fluid dynamics(CFD)numerical simulation and field experiment were used to investigate optimal operating parameters of high-pressure jet grouting equipment and clarify the boundary law of the injection area in the remediation process. The response surface optimization design results show that the optimal injection pressure is 30 MPa, rotation speed is 23 r/min, commission speed is 30 cm/min, and the optimal injection diameter is 147.3 cm. Based on the CFD numerical simulation, the ratio of the injection core, turbulent zone, and seepage zone is approximately 1∶4∶2. The distribution law of jet core, turbulence zone and seepage zone at different cross-sections under 30 MPa operating conditions is as follows: The jet core radius is approximately 100 mm, the turbulence zone is mainly distributed at 100 to 500 mm, the seepage zone is mainly distributed at 500 to 700 mm, the seepage zone could be completed within 2 h, and the proportion of the three boundary zones in the injection zone is similar to that of the numerical simulation. This study provides theoretical parameters and practical reference for the remediation of deep pollution via in-situ chemical oxidation in the Loess Plateau soil environment.

References:

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Memo

Memo:

Biography: Wang Yajun(1979—), male, doctor, associate professor, wyj79626@163.com.
Foundation items: The National Natural Science Foundation of China(No.41967043, 52160003), the Natural Science Foundation of Gansu Province(No.20JR5RA461), the Key Project of China Railway Southwest Research Institute Co., Ltd.(No.2018-KJ003-Z003-XB), the Industrial Support Program of the Higher Education of Gansu Province(No.2020C-40).
Citation: Wang Yajun, Dong Wantao, Chen Tianjing, et al. In-situ remediation of deep petroleum-contaminated soil injection[J].Journal of Southeast University(English Edition), 2021, 37(4):394-400.DOI:10.3969/j.issn.1003-7985.2021.04.008.

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