ANALYSIS OF DISTRIBUTION CHARACTERISTICS OF BTEX IN A DYESTUFF CHEMICAL SITE

PENG Jin-jin; LI Lin; ZHENG Chuan; HU Ling; WU Xiao-xu

doi:10.13205/j.hjgc.202104028

Volume 39 Issue 4

Jul. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(4): 187-194

PENG Jin-jin, LI Lin, ZHENG Chuan, HU Ling, WU Xiao-xu. ANALYSIS OF DISTRIBUTION CHARACTERISTICS OF BTEX IN A DYESTUFF CHEMICAL SITE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(4): 187-194. doi: 10.13205/j.hjgc.202104028

Citation:

PENG Jin-jin, LI Lin, ZHENG Chuan, HU Ling, WU Xiao-xu. ANALYSIS OF DISTRIBUTION CHARACTERISTICS OF BTEX IN A DYESTUFF CHEMICAL SITE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(4): 187-194. doi: 10.13205/j.hjgc.202104028

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ANALYSIS OF DISTRIBUTION CHARACTERISTICS OF BTEX IN A DYESTUFF CHEMICAL SITE

doi: 10.13205/j.hjgc.202104028

1. Wuhan Research Institute of Environmental Protection, Wuhan 430015, China;
2. Wuhan Zhihuiyuan Environmental Protection Technology Co., Ltd, Wuhan 430074, China

Received Date: 2020-05-08
Available Online: 2021-07-21

Abstract

Abstract

In order to understand the distribution characteristics of benzene series(BTEX) in the soil of a dye chemical pollution site in the middle reaches of the Yangtze River, 17 groundwater samples and 343 soil samples were determined. The results showed that:the distribution of BTEX in groundwater and soil was consistent, and the pollution had homology; due to the flat terrain and poor horizontal permeability of soil, the diffusion range of pollutants was limited. Influenced by soil anti-pollution performance, benzene, m,p-xylene and o-xylene were mainly detected in soil layer above 7.2 m, the three substances mainly existed as light non-aqueous phase liquid (LNAPL) in the soil, and they accumulated near the groundwater level, and continued to migrate in the saturated zone in dissolved state. Chlorobenzene mainly existed in soil as heavy nonaqueous liquid (DNAPL), the concentration of chlorobenzene in soil was higher, and the depth of migration was deeper, related to the form, migration time and geological conditions. It was suggested that the combination of ex-situ normal temperature desorption and chemical oxidation technology should be used for shallow contaminated soil, and in-situ chemical oxidation technology should be used for deep contaminated soil and polluted groundwater, in the remediation project.
- soil,
- groundwater,
- dyestuff chemical,
- benzene series,
- space distribution

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