Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area

Seasonal frozen soil accounts for about 53.50% of the land area in China. Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However,...
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Autor*in:	Huan Huang [verfasserIn] Chang-fu Chen [verfasserIn] Xiao-jie Mo [verfasserIn] Ding-ding Wu [verfasserIn] Yan-ming Liu [verfasserIn] Ming-zhu Liu [verfasserIn] Hong-han Chen [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Freezing area Pore fluid Ice-liquid interface Salt rejection Solute migration Building

Übergeordnetes Werk:	In: China Geology - KeAi Communications Co., Ltd., 2020, 4(2021), 3, Seite 446-454
Übergeordnetes Werk:	volume:4 ; year:2021 ; number:3 ; pages:446-454

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.31035/cg2021059

Katalog-ID:	DOAJ080904033

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520			\|a Seasonal frozen soil accounts for about 53.50% of the land area in China. Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However, little knowledge is available about the process and mechanisms of salt migration in frozen soil. This study explores the mechanisms of salt migration at the ice-liquid interface during the freezing of pore fluids through batch experiments. The results are as follows. The solute concentrations of liquid and solid phases at the ice-liquid interface (CL, CS) gradually increased at the initial stage of freezing and remained approximately constant at the middle stage. As the ice-liquid interface advanced toward the system boundary, the diffusion of the liquid phase was blocked but the ice phase continued rejecting salts. As a result, CL* and CS* rapidly increased at the final stage of freezing. The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. These results have insights and scientific significance for the tackling of climate change, the environmental protection of groundwater and soil, and infrastructure protection such as roads, among other things.© 2021 China Geology Editorial Office.
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The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. 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callnumber-first	T - Technology
author	Huan Huang
spellingShingle	Huan Huang misc TA1-2040 misc QE1-996.5 misc Freezing area misc Pore fluid misc Ice-liquid interface misc Salt rejection misc Solute migration misc Building misc Engineering (General). Civil engineering (General) misc Geology Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
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topic_title	TA1-2040 QE1-996.5 Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area Freezing area Pore fluid Ice-liquid interface Salt rejection Solute migration Building
topic	misc TA1-2040 misc QE1-996.5 misc Freezing area misc Pore fluid misc Ice-liquid interface misc Salt rejection misc Solute migration misc Building misc Engineering (General). Civil engineering (General) misc Geology
topic_unstemmed	misc TA1-2040 misc QE1-996.5 misc Freezing area misc Pore fluid misc Ice-liquid interface misc Salt rejection misc Solute migration misc Building misc Engineering (General). Civil engineering (General) misc Geology
topic_browse	misc TA1-2040 misc QE1-996.5 misc Freezing area misc Pore fluid misc Ice-liquid interface misc Salt rejection misc Solute migration misc Building misc Engineering (General). Civil engineering (General) misc Geology
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title	Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
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title_full	Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
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author_browse	Huan Huang Chang-fu Chen Xiao-jie Mo Ding-ding Wu Yan-ming Liu Ming-zhu Liu Hong-han Chen
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title_sort	mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
callnumber	TA1-2040
title_auth	Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
abstract	Seasonal frozen soil accounts for about 53.50% of the land area in China. Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However, little knowledge is available about the process and mechanisms of salt migration in frozen soil. This study explores the mechanisms of salt migration at the ice-liquid interface during the freezing of pore fluids through batch experiments. The results are as follows. The solute concentrations of liquid and solid phases at the ice-liquid interface (CL, CS) gradually increased at the initial stage of freezing and remained approximately constant at the middle stage. As the ice-liquid interface advanced toward the system boundary, the diffusion of the liquid phase was blocked but the ice phase continued rejecting salts. As a result, CL* and CS* rapidly increased at the final stage of freezing. The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. These results have insights and scientific significance for the tackling of climate change, the environmental protection of groundwater and soil, and infrastructure protection such as roads, among other things.© 2021 China Geology Editorial Office.
abstractGer	Seasonal frozen soil accounts for about 53.50% of the land area in China. Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However, little knowledge is available about the process and mechanisms of salt migration in frozen soil. This study explores the mechanisms of salt migration at the ice-liquid interface during the freezing of pore fluids through batch experiments. The results are as follows. The solute concentrations of liquid and solid phases at the ice-liquid interface (CL, CS) gradually increased at the initial stage of freezing and remained approximately constant at the middle stage. As the ice-liquid interface advanced toward the system boundary, the diffusion of the liquid phase was blocked but the ice phase continued rejecting salts. As a result, CL* and CS* rapidly increased at the final stage of freezing. The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. These results have insights and scientific significance for the tackling of climate change, the environmental protection of groundwater and soil, and infrastructure protection such as roads, among other things.© 2021 China Geology Editorial Office.
abstract_unstemmed	Seasonal frozen soil accounts for about 53.50% of the land area in China. Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However, little knowledge is available about the process and mechanisms of salt migration in frozen soil. This study explores the mechanisms of salt migration at the ice-liquid interface during the freezing of pore fluids through batch experiments. The results are as follows. The solute concentrations of liquid and solid phases at the ice-liquid interface (CL, CS) gradually increased at the initial stage of freezing and remained approximately constant at the middle stage. As the ice-liquid interface advanced toward the system boundary, the diffusion of the liquid phase was blocked but the ice phase continued rejecting salts. As a result, CL* and CS* rapidly increased at the final stage of freezing. The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. These results have insights and scientific significance for the tackling of climate change, the environmental protection of groundwater and soil, and infrastructure protection such as roads, among other things.© 2021 China Geology Editorial Office.
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title_short	Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area
url	https://doi.org/10.31035/cg2021059 https://doaj.org/article/cd8dd888c32d455aa420102d90c2d27a http://www.sciencedirect.com/science/article/pii/S2096519221001579 https://doaj.org/toc/2096-5192
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Frozen soil is a complex multiphase system where ice, water, soil, and air coexist. The distribution and migration of salts in frozen soil during soil freezing are notably different from those in unfrozen soil areas. However, little knowledge is available about the process and mechanisms of salt migration in frozen soil. This study explores the mechanisms of salt migration at the ice-liquid interface during the freezing of pore fluids through batch experiments. The results are as follows. The solute concentrations of liquid and solid phases at the ice-liquid interface (CL, CS) gradually increased at the initial stage of freezing and remained approximately constant at the middle stage. As the ice-liquid interface advanced toward the system boundary, the diffusion of the liquid phase was blocked but the ice phase continued rejecting salts. As a result, CL* and CS* rapidly increased at the final stage of freezing. The distribution characteristics of solutes in ice and the liquid phases before CL* and CS* became steady were mainly affected by the freezing temperature, initial concentrations, and particle-size distribution of media (quartz sand and kaolin). In detail, the lower the freezing temperature and the better the particle-size distribution of media, the higher the solute proportion in the ice phase at the initial stage of freezing. Meanwhile, the increase in concentration first promoted but then inhibited the increase of solutes in the ice phase. 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Mechanisms of salt rejection at the ice-liquid interface during the freezing of pore fluids in the seasonal frozen soil area

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