東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Efficacy and Durability of Microbial...

Ehsasi, Farideh.

FindBook

Google Book

Amazon

博客來

Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions./
作者:	Ehsasi, Farideh.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	149 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
標題:	Geotechnology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30696102
ISBN:	9798381157031

Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions.
Ehsasi, Farideh.

Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 149 p.

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

Thesis (Ph.D.)--Arizona State University, 2023.

This item must not be sold to any third party vendors.

Microbially- and enzyme-induced carbonate precipitation (EICP and MICP) offer potentially sustainable and cost-effective mitigation methods for fugitive dust by forming an erosion-resistant crust on the soil through precipitation of a natural calcium carbonate (CaCO3) cement. While there have been isolated studies on the efficacy of the carbonate precipitation process, there are few systematic studies of the influence of the properties of the soil being treated (e.g., gradation, salt content) on the precipitation and the resulting wind erosion resistance. Moreover, the influence of environmental conditions on the durability of the crust formed by the induced carbonate precipitation has not been systematically investigated. In this research program, the efficacy and durability of EICP and MICP for dust mitigation were investigated for a variety of soil types and in different environmental conditions. Soil samples from seven sites with fugitive dust problems were treated with MICP or EICP and subjected to lab or field testing. The results of these tests showed that the effectiveness of biocementation treatment varies depending on the grain size distribution of soil and mineralogical composition. Testing on iron ore tailings materials demonstrated that treating by application of EICP solutions at lower concentrations (i.e., 0.5M and 0.75M of urea and calcium chloride) yielded effective results for poorly graded fine sand-sized tailings but the same solutions were ineffective for the well graded sand-sized tailings that contained large gravel-sized particles. Additionally, the application of MICP and EICP on sediments adjacent to a shrinking lake (the Salton Sea) with different salt contents exhibited enhanced performance in soils with lower salt content. The effect of temperature during deployment and precipitation cycles are shown to be significant environmental factors by simulating wetting-drying and freeze-thaw cycles in the laboratory. A dust-resistance crust formed through biocementation remained mostly intact after undergoing multiple cycles of wetting-drying. However, the durability of a dust-resistance crust formed through biocementation to multiple cycles of freeze-thaw depended on treatment solution concentration and soil grain size. Additionally, high temperature during field deployment of MICP adversely effected crust formation due to rapid evaporation that inhibited the complete hydrolysis of urea and the precipitation of carbonate.

ISBN: 9798381157031Subjects--Topical Terms:

1018558
Geotechnology.
Subjects--Index Terms:

Carbonate precipitation

Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions.
LDR:03755nmm a2200373 4500 001 2393545
005 20240318062701.5
006 m o d
007 cr#unu||||||||
008 251215s2023 ||||||||||||||||| ||eng d
020 $a 9798381157031
035 $a (MiAaPQ)AAI30696102
035 $a AAI30696102
040 $a MiAaPQ $c MiAaPQ
100 1 $a Ehsasi, Farideh. $3 3763013
245 1 0 $a Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 149 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
500 $a Advisor: Kavazanjian, Edward, Jr.
502 $a Thesis (Ph.D.)--Arizona State University, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Microbially- and enzyme-induced carbonate precipitation (EICP and MICP) offer potentially sustainable and cost-effective mitigation methods for fugitive dust by forming an erosion-resistant crust on the soil through precipitation of a natural calcium carbonate (CaCO3) cement. While there have been isolated studies on the efficacy of the carbonate precipitation process, there are few systematic studies of the influence of the properties of the soil being treated (e.g., gradation, salt content) on the precipitation and the resulting wind erosion resistance. Moreover, the influence of environmental conditions on the durability of the crust formed by the induced carbonate precipitation has not been systematically investigated. In this research program, the efficacy and durability of EICP and MICP for dust mitigation were investigated for a variety of soil types and in different environmental conditions. Soil samples from seven sites with fugitive dust problems were treated with MICP or EICP and subjected to lab or field testing. The results of these tests showed that the effectiveness of biocementation treatment varies depending on the grain size distribution of soil and mineralogical composition. Testing on iron ore tailings materials demonstrated that treating by application of EICP solutions at lower concentrations (i.e., 0.5M and 0.75M of urea and calcium chloride) yielded effective results for poorly graded fine sand-sized tailings but the same solutions were ineffective for the well graded sand-sized tailings that contained large gravel-sized particles. Additionally, the application of MICP and EICP on sediments adjacent to a shrinking lake (the Salton Sea) with different salt contents exhibited enhanced performance in soils with lower salt content. The effect of temperature during deployment and precipitation cycles are shown to be significant environmental factors by simulating wetting-drying and freeze-thaw cycles in the laboratory. A dust-resistance crust formed through biocementation remained mostly intact after undergoing multiple cycles of wetting-drying. However, the durability of a dust-resistance crust formed through biocementation to multiple cycles of freeze-thaw depended on treatment solution concentration and soil grain size. Additionally, high temperature during field deployment of MICP adversely effected crust formation due to rapid evaporation that inhibited the complete hydrolysis of urea and the precipitation of carbonate.
590 $a School code: 0010.
650 4 $a Geotechnology. $3 1018558
650 4 $a Soil sciences. $3 2122699
650 4 $a Environmental science. $3 677245
653 $a Carbonate precipitation
653 $a Dust mitigation
653 $a Soil types
690 $a 0428
690 $a 0768
690 $a 0481
710 2 $a Arizona State University. $b Civil, Environmental and Sustainable Engineering. $3 3289089
773 0 $t Dissertations Abstracts International $g 85-06B.
790 $a 0010
791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30696102