Bio-Mediated Soil Improvement Using Plant Derived Enzyme in Addition to Magnesium Ion

Imran, Md Al; Nakashima, Kazunori; Kawasaki, Satoru

Crystals, 2021, 11(5), 516

Permalink : https://hdl.handle.net/2115/81993

このアイテムのアクセス数:470件（2026-10-10 17:38 集計）

閲覧可能ファイル 

ファイル フォーマット サイズ 閲覧回数 説明
https://doi.org/10.3390/cryst11050516     100

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

アクセス権
open access
URI
https://hdl.handle.net/2115/81993
タイトル
Bio-Mediated Soil Improvement Using Plant Derived Enzyme in Addition to Magnesium Ion
著者
Imran, Md Al ; Nakashima, Kazunori ; Kawasaki, Satoru
著者名
Imran, Md Al
著者名
Nakashima, Kazunori
e-Rad_Researcher
00304022
著者名
Kawasaki, Satoru
言語
英語
キーワード
enzyme-induced carbonate precipitation (EICP)
urease activity
Mg2+
Ca2+ ratios
watermelon seeds
CaCO3 morphology
soil improvement
plant-derived urease enzyme
bio-cement
発行日
2021-05
出版者
MDPI
収録物名
Crystals
巻(号)
11(5)
ページ
516
抄録
Recently, soil improvement using EICP (Enzyme-Induced Carbonate Precipitation) methods in the geotechnical and geo-environmental field has become a prominent interest worldwide. The objective of this study was to develop an improved extraction technique of crude urease from watermelon seeds in both dry and germinated conditions. Subsequently, this study also analyzed the improvement methodology of crystal polymorphs and soil bonding incorporation of various Mg2+/Ca2+ ratios. The optimization of enzyme-mediated carbonate precipitation was also investigated by Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD) analysis. Results confirmed that the precipitated crystals are mainly calcite, vaterite and aragonite primarily (depending on the Mg2+/Ca2+ ratios). Therefore, to improve the bonding capacity in between the sand particles a novel improvement methodology was investigated by adding various Mg2+/Ca2+ ratios. The mechanical properties of the treated soil (Mikawa Sand, D-50 = 0.870 mm) specimens were tested by unconfined compressive strength (UCS) and this confirmed the effectiveness of adding various Mg2+/Ca2+ ratios. The results of the UCS tests showed that, the lower molar ratios of Mg2+/Ca2+ can significantly improve the UCS of the specimen (up to 50%) which could be considered a significant outcome for different bio-geotechnical applications.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
PISSN
2073-4352
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.3390/cryst11050516