EXPERIMENTAL STUDY ON IN-SITU CHEMICAL OXIDATION HIGH-PRESSURE ROTARY SPRAY REMEDIATION OF ORGANIC CONTAMINATED SITES

WU Xia; SANG Kangyun; LIU Zeyu

doi:10.13205/j.hjgc.202307017

Volume 41 Issue 7

Jul. 2023

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WU Xia, SANG Kangyun, LIU Zeyu. EXPERIMENTAL STUDY ON IN-SITU CHEMICAL OXIDATION HIGH-PRESSURE ROTARY SPRAY REMEDIATION OF ORGANIC CONTAMINATED SITES[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 124-130. doi: 10.13205/j.hjgc.202307017

Citation:

WU Xia, SANG Kangyun, LIU Zeyu. EXPERIMENTAL STUDY ON IN-SITU CHEMICAL OXIDATION HIGH-PRESSURE ROTARY SPRAY REMEDIATION OF ORGANIC CONTAMINATED SITES[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 124-130. doi: 10.13205/j.hjgc.202307017

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EXPERIMENTAL STUDY ON IN-SITU CHEMICAL OXIDATION HIGH-PRESSURE ROTARY SPRAY REMEDIATION OF ORGANIC CONTAMINATED SITES

doi: 10.13205/j.hjgc.202307017

WU Xia^1,2,3,4,
SANG Kangyun^3,4,
LIU Zeyu^{1,2
,
,}

1. Power China Zhongnan Engineering Co., Ltd., Changsha 410014, China;
2. Power China Environmental Engineering Co., Ltd., Changsha 410014, China;
3. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
4. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education, Changsha 410083, China

Received Date: 2022-10-14

Abstract

Abstract

In-situ chemical oxidation high-pressure rotary spray remediation technology has broad application prospects in the remediation of organic contaminated sites. Based on the remediation project of a compound organic contaminated site, the field impact radius test was conducted to evaluate the optimal construction parameters for a high-pressure rotary jet. The indoor pilot test was used to study the impacts of the oxidant dosing ratio and the initial concentration of pollutants on the remediation effect, and the engineering pilot scale application was operated to identify the best oxidant dosing ratio for the site. The results showed that the best construction parameters of the high-pressure rotary jet at the site were rotation speed of 15 r/min, nozzle diameter of 2.5 mm, injection pressure of 25 MPa, and lifting speed of 15 cm/min. The composite oxidant of sodium persulfate activated by sodium hydroxide has good repair effect. The lower the dosage ratio of oxidant and the higher the initial concentrations of pollutants, the higher the pollutant removal rate; when the dosing ratio of oxidant increased to 5%, the concentrations of organic pollutants in the application area of the pilot scale project were reduced to the target values of remediation. The research results have high engineering reference value.
- high pressure rotary jet,
- in-situ chemical oxidation,
- compound organic pollution site,
- soil remediation

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References(21)

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