Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process

Given that acid-rich rainfall can cause serious damage to heritage buildings in NW China and subsequently accelerate their aging problem, countermeasures to protect their integrity and also to preserve the continuity of Chinese culture are in pressing need. Enzyme-induced carbonate precipitation (EI...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Wenle Hu, Wen-Chieh Cheng, Shaojie Wen, Ke Yuan
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	enzyme-induced carbonate precipitation hijacking mechanism magnesium ions ammonium ions test tube experiment Biotechnology TP248.13-248.65
Acceso en línea:	https://doaj.org/article/93269e8255194c56ba049b94d50f01de
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:93269e8255194c56ba049b94d50f01de
record_format	dspace
spelling	oai:doaj.org-article:93269e8255194c56ba049b94d50f01de2021-11-30T13:37:26ZRevealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process2296-418510.3389/fbioe.2021.750258https://doaj.org/article/93269e8255194c56ba049b94d50f01de2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fbioe.2021.750258/fullhttps://doaj.org/toc/2296-4185Given that acid-rich rainfall can cause serious damage to heritage buildings in NW China and subsequently accelerate their aging problem, countermeasures to protect their integrity and also to preserve the continuity of Chinese culture are in pressing need. Enzyme-induced carbonate precipitation (EICP) that modifies the mechanical properties of the soil through enhancing the interparticle bonds by the precipitated crystals and the formation of other carbonate minerals is under a spotlight in recent years. EICP is considered as an alternative to the microbial-induced carbonate precipitation (MICP) because cultivating soil microbes are considered to be challenging in field applications. This study conducts a series of test tube experiments to reproduce the ordinary EICP process, and the produced carbonate precipitation is compared with that of the modified EICP process subjected to the effect of higher MgCl2, NH4Cl, and CaCl2 concentrations, respectively. The modified EICP, subjected to the effect of higher MgCl2 concentrations, performs the best with the highest carbonate precipitation. The enhancement mechanism of carbonate precipitation is well interpreted through elevating the activity of urease enzyme by introducing the magnesium ions. Furthermore, the degradation of carbonate precipitation presents when subjected to the effect of higher NH4Cl concentration. The decreasing activity of urease enzyme and the reverse EICP process play a leading role in degrading the carbonate precipitation. Moreover, when subjected to the effect of higher CaCl2 concentrations, the slower rate of urea hydrolysis and the decreasing activity of urease enzyme are primarily responsible for forming the “hijacking” phenomenon of carbonate precipitation. The findings of this study explore the potential use of the EICP technology for the protection of heritage buildings in NW China.Wenle HuWen-Chieh ChengWen-Chieh ChengShaojie WenKe YuanFrontiers Media S.A.articleenzyme-induced carbonate precipitationhijacking mechanismmagnesium ionsammonium ionstest tube experimentBiotechnologyTP248.13-248.65ENFrontiers in Bioengineering and Biotechnology, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	enzyme-induced carbonate precipitation hijacking mechanism magnesium ions ammonium ions test tube experiment Biotechnology TP248.13-248.65
spellingShingle	enzyme-induced carbonate precipitation hijacking mechanism magnesium ions ammonium ions test tube experiment Biotechnology TP248.13-248.65 Wenle Hu Wen-Chieh Cheng Wen-Chieh Cheng Shaojie Wen Ke Yuan Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
description	Given that acid-rich rainfall can cause serious damage to heritage buildings in NW China and subsequently accelerate their aging problem, countermeasures to protect their integrity and also to preserve the continuity of Chinese culture are in pressing need. Enzyme-induced carbonate precipitation (EICP) that modifies the mechanical properties of the soil through enhancing the interparticle bonds by the precipitated crystals and the formation of other carbonate minerals is under a spotlight in recent years. EICP is considered as an alternative to the microbial-induced carbonate precipitation (MICP) because cultivating soil microbes are considered to be challenging in field applications. This study conducts a series of test tube experiments to reproduce the ordinary EICP process, and the produced carbonate precipitation is compared with that of the modified EICP process subjected to the effect of higher MgCl2, NH4Cl, and CaCl2 concentrations, respectively. The modified EICP, subjected to the effect of higher MgCl2 concentrations, performs the best with the highest carbonate precipitation. The enhancement mechanism of carbonate precipitation is well interpreted through elevating the activity of urease enzyme by introducing the magnesium ions. Furthermore, the degradation of carbonate precipitation presents when subjected to the effect of higher NH4Cl concentration. The decreasing activity of urease enzyme and the reverse EICP process play a leading role in degrading the carbonate precipitation. Moreover, when subjected to the effect of higher CaCl2 concentrations, the slower rate of urea hydrolysis and the decreasing activity of urease enzyme are primarily responsible for forming the “hijacking” phenomenon of carbonate precipitation. The findings of this study explore the potential use of the EICP technology for the protection of heritage buildings in NW China.
format	article
author	Wenle Hu Wen-Chieh Cheng Wen-Chieh Cheng Shaojie Wen Ke Yuan
author_facet	Wenle Hu Wen-Chieh Cheng Wen-Chieh Cheng Shaojie Wen Ke Yuan
author_sort	Wenle Hu
title	Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
title_short	Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
title_full	Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
title_fullStr	Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
title_full_unstemmed	Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process
title_sort	revealing the enhancement and degradation mechanisms affecting the performance of carbonate precipitation in eicp process
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/93269e8255194c56ba049b94d50f01de
work_keys_str_mv	AT wenlehu revealingtheenhancementanddegradationmechanismsaffectingtheperformanceofcarbonateprecipitationineicpprocess AT wenchiehcheng revealingtheenhancementanddegradationmechanismsaffectingtheperformanceofcarbonateprecipitationineicpprocess AT wenchiehcheng revealingtheenhancementanddegradationmechanismsaffectingtheperformanceofcarbonateprecipitationineicpprocess AT shaojiewen revealingtheenhancementanddegradationmechanismsaffectingtheperformanceofcarbonateprecipitationineicpprocess AT keyuan revealingtheenhancementanddegradationmechanismsaffectingtheperformanceofcarbonateprecipitationineicpprocess
_version_	1718406577016274944

Revealing the Enhancement and Degradation Mechanisms Affecting the Performance of Carbonate Precipitation in EICP Process

Ejemplares similares