Improving washing efficiency of heavy metal-contaminated clayey soils based on repeated ice-segregation in seasonal frozen areas

ZHANG Jun; WU Tao; RUI Da-hu; ZHANG Hai-yang; LI Guo-yu; ITO Yzu-ru; LUO Ming-jing

doi:10.11779/CJGE202209011

Volume 44 Issue 9

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2022 > 44(9): 1663-1670. > DOI: 10.11779/CJGE202209011

ZHANG Jun, WU Tao, RUI Da-hu, ZHANG Hai-yang, LI Guo-yu, ITO Yzu-ru, LUO Ming-jing. Improving washing efficiency of heavy metal-contaminated clayey soils based on repeated ice-segregation in seasonal frozen areas[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(9): 1663-1670. DOI: 10.11779/CJGE202209011

Citation:

PDF (3582 KB)

Improving washing efficiency of heavy metal-contaminated clayey soils based on repeated ice-segregation in seasonal frozen areas

1.
School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
2.
State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
3.
No.2 Institute of Geological & Mineral Resources Survey of Henan, Zhengzhou 450001, China
4.
Department of Civil Engineering, Setsunan University, Osaka 572-8508, Japan
5.
The Third Construction Co., Ltd. of China Construction Eighth Engineering Division, Nanjing 210000, China

More Information

Received Date: July 22, 2021
Available Online: September 22, 2022

Graphical Abstract

Abstract

Abstract

The scheme to improve the washing efficiency of heavy metal-contaminated clayey soil is proposed by using the repeated ice-segregation based on the theory of "repeated segregation mechanism of thick ground ice". The laboratory batch washing tests and freezing-thawing and washing tests are performed on Cd- and Pb-contaminated clayey soils with EDTA, tartaric acid as eluents. Subsequently, the removal effects of heavy metals under different working conditions are analyzed. The results show that it provides advantages for water migration in thawing soils and repeated ice-segregation by controlling the thawing rate. Compared with that of the single freezing-water intaking mode, the eluent intaking amount of the freezing-thawing and washing tests with repeated ice-segregation increases by about 20%. The repeated fluctuations of the freezing-thawing interface will promote the eluent to fully contact with the heavy metal in the soils. Their synergistic effects can effectively increase the removal effeciency of heavy metals. The removal efficiency of Cd and Pb increases by 43.95% and 171.74%, respectively. It is of certain reality and universality in practical engineering application and provides a new idea for the remediation of heavy metal-contaminated clayey soils in seasonal frozen areas.
- freezing-thawing and washing,
- repeated ice-segregation,
- thawing rate,
- heavy metal-contaminated clayey soil

FullText(HTML)

References (16)

References

[1]	王菲, 徐汪祺. 固化/稳定化和软土加固污染土的强度和浸出特性研究[J]. 岩土工程学报, 2020, 42(10): 1955–1961. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202010028.htm WANG Fei, XU Wang-qi. Strength and leaching performances of stabilized/solidified(S/S) and ground improved (GI) contaminated site soils[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(10): 1955–1961. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202010028.htm
[2]	DASSEKPO J B M, NING J Q, ZHA X X. Potential solidification/stabilization of clay-waste using green geopolymer remediation technologies[J]. Process Safety and Environmental Protection, 2018, 117: 684–693. doi: 10.1016/j.psep.2018.06.013
[3]	DERMONT G, BERGERON M, MERCIER G, et al. Soil washing for metal removal: a review of physical/chemical technologies and field applications[J]. Journal of Hazardous Materials, 2008, 152(1): 1–31. doi: 10.1016/j.jhazmat.2007.10.043
[4]	GRIFFITHS R A. Soil-washing technology and practice[J]. Journal of Hazardous Materials, 1995, 40(2): 175–189. doi: 10.1016/0304-3894(94)00064-N
[5]	CHANG B V, CHIANG B W, YUAN S Y. Biodegradation of nonylphenol in soil[J]. Chemosphere, 2007, 66(10): 1857–1862. doi: 10.1016/j.chemosphere.2006.08.029
[6]	ASH C, TEJNECKÝ V, ŠEBEK O, et al. Redistribution of cadmium and lead fractions in contaminated soil samples due to experimental leaching[J]. Geoderma, 2015, 241/242: 126–135. doi: 10.1016/j.geoderma.2014.11.022
[7]	FEDJE K K, YILLIN L, STRÖMVALL A M. Remediation of metal polluted hotspot areas through enhanced soil washing- evaluation of leaching methods[J]. Journal of Environmental Management, 2013, 128: 489–496. doi: 10.1016/j.jenvman.2013.05.056
[8]	SEMER R, REDDY K R. Evaluation of soil washing process to remove mixed contaminants from a sandy loam[J]. Journal of Hazardous Materials, 1996, 45(1): 45–57. doi: 10.1016/0304-3894(96)82887-1
[9]	芮大虎, 武迎飞, 陈雪, 等. 复合冻融与淋洗方法修复重金属污染黏性土的研究[J]. 岩土工程学报, 2019, 41(2): 286–293. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201902007.htm RUI Da-hu, WU Ying-fei, CHEN Xue, et al. Remediation of heavily metal-contaminated clayey soils by composite freeze-thaw and soil washing method[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(2): 286–293. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201902007.htm
[10]	RUI D H, WU Z P, JI M, et al. Remediation of Cd- and Pb- contaminated clay soils through combined freeze-thaw and soil washing[J]. Journal of Hazardous Materials, 2019, 369: 87–95. doi: 10.1016/j.jhazmat.2019.02.038
[11]	CHENG K T. The mechanism of repeated-segregation for the formation of thick layered ground ice[J]. Cold Regions Science and Technology, 1983, 8(1): 57–66. doi: 10.1016/0165-232X(83)90017-4
[12]	MING F, LI D Q. A model of migration potential for moisture migration during soil freezing[J]. Cold Regions Science and Technology, 2016, 124: 87–94. doi: 10.1016/j.coldregions.2015.12.015
[13]	ZHOU J Z, WEI C F, LI D Q, et al. A moving-pump model for water migration in unsaturated freezing soil[J]. Cold Regions Science and Technology, 2014(104/105): 14–22. http://www.onacademic.com/detail/journal_1000036125878410_8173.html
[14]	王洋, 刘景双, 王国平, 等. 冻融作用与土壤理化效应的关系研究[J]. 地理与地理信息科学, 2007, 23(2): 91–96. https://www.cnki.com.cn/Article/CJFDTOTAL-DLGT200702021.htm WANG Yang, LIU Jing-shuang, WANG Guo-ping, et al. Study on the effect of freezing and thawing action on soil physical and chemical characteristics[J]. Geography and Geo-Information Science, 2007, 23(2): 91–96. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DLGT200702021.htm
[15]	王家澄, 程国栋, 张宏鼎, 等. 饱水砂土反复冻融时成冰条件的试验研究[J]. 冰川冻土, 1992, 14(2): 101–106, 191. https://www.cnki.com.cn/Article/CJFDTOTAL-BCDT199202001.htm WANG Jia-cheng, CHENG Guo-dong, ZHANG Hong-ding, et al. Experimental study on conditions for ice formation of saturated sand in freezing and thawing cycles[J]. Journal of Glaciology and Geocryology, 1992, 14(2): 101–106, 191. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BCDT199202001.htm
[16]	李述训, 程国栋, 张宏鼎, 等. 冰水系统中的砖在融化过程中水分迁移实验研究[J]. 冰川冻土, 1991, 13(4): 323–329. https://www.cnki.com.cn/Article/CJFDTOTAL-BCDT199104006.htm LI Shu-xun, CHENG Guo-dong, ZHANG Hong-ding, et al. Experimertal reseach on moisture migration of brick in ice-water system during thawing[J]. Journal of Glaciology and Geocryology, 1991, 13(4): 323–329. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BCDT199104006.htm