國立虎尾科技大學 |

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-語言資料,手稿 : 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.
面頁冊數:	1 online resource (149 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
標題:	Environmental science. -
電子資源:	click for full text (PQDT)
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. - 1 online resource (149 pages)

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

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

Includes bibliographical references

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.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381157031Subjects--Topical Terms:

1179128
Environmental science.
Subjects--Index Terms:

Carbonate precipitation Index Terms--Genre/Form:

554714
Electronic books.

Efficacy and Durability of Microbially/Enzyme-Induced Carbonate Precipitation (MICP/EICP) for Dust Mitigation of Various Soil Types and Under Different Environmental Conditions.
LDR:03908ntm a2200373K 4500 001 1141641
005 20240318062701.5
006 m o d
007 cr mn ---uuuuu
008 250605s2023 xx obm 000 0 eng d
020 $a 9798381157031
035 $a (MiAaPQ)AAI30696102
035 $a AAI30696102
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Ehsasi, Farideh. $3 1465549
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.
264 0 $c 2023
300 $a 1 online resource (149 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
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.
504 $a Includes bibliographical references
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.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Environmental science. $3 1179128
650 4 $a Soil sciences. $3 1179645
650 4 $a Geotechnology. $3 1179676
653 $a Carbonate precipitation
653 $a Dust mitigation
653 $a Soil types
655 7 $a Electronic books. $2 local $3 554714
690 $a 0428
690 $a 0768
690 $a 0481
710 2 $a Arizona State University. $b Civil, Environmental and Sustainable Engineering. $3 1179779
710 2 $a ProQuest Information and Learning Co. $3 1178819
773 0 $t Dissertations Abstracts International $g 85-06B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30696102 $z click for full text (PQDT)