Biostabilization of Desert Sands Using Bacterially Induced Calcite Precipitation

被引：27

作者：

Chen, Fei ^{[1
,2
]}

Deng, Chunnuan ^{[3
]}

Song, Wenjuan ^{[1
]}

Zhang, Daoyong ^{[1
,4
]}

Al-Misned, Fahad A. ^{[5
]}

Mortuza, M. Golam ^{[5
,6
]}

Gadd, Geoffrey Michael ^{[1
,7
]}

Pan, Xiangliang ^{[1
]}

机构：

[1] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Environm Pollut & Bioremediat, Urumqi 830011, Peoples R China

[2] Grad Univ Chinese Acad Sci, Beijing, Peoples R China

[3] Yunnan Normal Univ, Coll Tourism & Geog Sci, Kunming, Peoples R China

[4] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang, Peoples R China

[5] King Saud Univ, Coll Sci, Dept Zool, Riyadh 11451, Saudi Arabia

[6] Rajshahi Univ, Fac Life & Earth Sci, Dept Zool, Rajshahi 6205, Bangladesh

[7] Univ Dundee, Sch Life Sci, Geomicrobiol Grp, Dundee, Scotland

来源：

GEOMICROBIOLOGY JOURNAL | 2016年 / 33卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

Consolidation; microbial carbonate precipitation; sand storm; wind erosion; ureolytic bacteria; BIOLOGICAL SOIL CRUSTS; CARBONATE PRECIPITATION; UREOLYTIC BACTERIA; CONTAMINATED SOIL; BIOMINERALIZATION; BIOREMEDIATION; REMEDIATION; NITROGEN;

D O I：

10.1080/01490451.2015.1053584

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sand storms have become a growing global environmental issue and there is an urgent need to explore cost-effective green technologies to stabilize the sands of desert regions. In this study, the performance of a ureolytic Bacillus sp. for stabilization of sands was evaluated. The Bacillus sp. could efficiently consolidate sand particles by hydrolysis of urea and the subsequent production of calcite and aragonite minerals. The biostabilized sands had a high resistance to erosion by a 33 m s(-1) wind speed even after 12-d exposure to freeze-thaw cycles. The compressive strength of biostabilized sands was dependent on the applied cell density and concentrations of Ca2+ and urea. High cell densities, urea and Ca2+ concentrations reduced the compressive strength. The optimal cell density, Ca2+ and urea concentrations were OD600 0.4, 15 mM and 20 g L-1, respectively, when performance and cost were considered. This study shows that biostabilization of sand based on microbially induced carbonate precipitation (MICP) has potential for the prevention of sand storms and wind erosion of soil.

引用

页码：243 / 249

页数：7

共 24 条

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