气候变化领域集成服务门户(CCPortal): Effects of different freezing rates on purification efficiency of sandy soil contaminated by heavy metal copper

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DOI	10.1016/j.coldregions.2019.03.015
	Effects of different freezing rates on purification efficiency of sandy soil contaminated by heavy metal copper
	Liu, Shuxing; Wang, Jianzhou; Zhou, Guoqing; Chen, Tuo; Zhou, Yang; Wang, Tao; Mu, Yanhu; Liang, Hengchang
发表日期	2019
ISSN	0165-232X
EISSN	1872-7441
卷号	163
英文摘要	Over the last several decades, a variety of methods have been developed for treating contaminated sites. Which technique is applied depends on the type of contaminant, the extent of dispersion, and the likelihood of additional contamination during the cleanup. Among the selection of potential techniques is the artificial freezing method, in which soil is frozen to significantly lower the permeability and prevent further diffusion of pollutants. While this method appears to have merit in theory, few studies have investigated the migration of pollutants during the soil freezing process. In this paper, a series of artificial freezing purification tests were performed and the influences of different freezing rates on purification efficiency were investigated. The experimental results show that the freezing rate is an important factor affecting the freezing purification efficiency for heavy metal copper and the purification rate decreases rapidly with increasing freezing rate. A soil freezing rate of 0.3 degrees C/h results in a heavy metal copper purification rate of only 27%; far less than that of the freezing rate of 0.05 degrees C/h, where the purification rate is 85%. This study demonstrates that a strong correlation exists between the purification rate of heavy metal copper and the soil freezing rates. We also demonstrate that the purification rate can be expressed as a cubic of the soil freezing rate. Therefore, the optimal purification of contaminated sites can be obtained by determining the proper freezing rate.
关键词	Purification rate Freezing rate Sandy soil Heavy metal copper Artificial freezing method
学科领域	Engineering; Geology
语种	英语
WOS研究方向	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112049
作者单位	China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shuxing,Wang, Jianzhou,Zhou, Guoqing,et al. Effects of different freezing rates on purification efficiency of sandy soil contaminated by heavy metal copper[J]. 中国科学院西北生态环境资源研究院,2019,163.
APA	Liu, Shuxing.,Wang, Jianzhou.,Zhou, Guoqing.,Chen, Tuo.,Zhou, Yang.,...&Liang, Hengchang.(2019).Effects of different freezing rates on purification efficiency of sandy soil contaminated by heavy metal copper.COLD REGIONS SCIENCE AND TECHNOLOGY,163.
MLA	Liu, Shuxing,et al."Effects of different freezing rates on purification efficiency of sandy soil contaminated by heavy metal copper".COLD REGIONS SCIENCE AND TECHNOLOGY 163(2019).