热修复过程中重质非水相液体(DNAPL)共沸实验

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Abstract In this study, single-component and multi-component DNAPL thermal remediation experiments were carried out to establish the relationship between temperature and DNAPL removal. In the single-component DNAPL experiments, an obvious temperature plateau was observed, while the co-boiling region showed a stage of gradually increasing temperature in the multi-component DNAPL experiments. The co-boiling duration was positively correlated with the initial DNAPL saturation in both experiments. The remediation process can be inaccurately interpreted from local-scale temperature measurements, and 0.94% to 1.60% DNAPL saturation remained in the jar after the end of observed co-boiling. Temperature measurement can be affected by DNAPL saturation, DNAPL composition and the location of thermocouples, and it can only reflect the local heating stage. The change of the components in gas and soil samples can help evaluate the remediation process during thermal remediation.

Key words： DNAPL in-situ thermal remediation co-boiling multi-component

Received: 07 January 2020

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X53

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	Articles by authors
	HUANG Wan
	GENG Zhu-ning
	LI Guang-he
	ZHANG Fang

Cite this article:

HUANG Wan,GENG Zhu-ning,LI Guang-he等. Laboratory study on dense non-aqueous phase liquid co-boiling during thermal remediation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(9): 3903-3910.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I9/3903

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