The potential for using plant-derived urease enzyme to cement sands by inducing calcium carbonate CaCO3 precipitation has been demonstrated through a series of laboratory column tests on two different gradations of silica sand. The use of microbially induced carbonate precipitation MICP toChat Online
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Carbonate cementation via plant derived urease. The use of plant-derived urease enzyme to induce calcium carbonate CaCO3 cementation has been demonstrated through laboratory column tests. Benefits of the use of plant-derived urease over the use of microbially-generated urease to induce carbonate cementation include the small size of the enzyme, which permits penetration into finer+
Abstract. The use of plant-derived urease enzyme to induce calcium carbonate CaCO 3 cementation has been demonstrated through laboratory column tests. Benefits of the use of plant-derived urease over the use of microbially-generated urease to induce carbonate cementation include the small size of the enzyme, which permits penetration into finer grained soils and makes the process less sensitive to+
carbonate in between sand particles at the presence of calcium ions in the system. However, plant-derived urease may offer many benefits over microbial urease to induce carbonate cementation.+
Enzyme Induced Cementation. Carbonate precipitation via hydrolysis of urea is a potentially inexpensive cementation method. Uses common materials CaCl. 2, urea amp the enzyme ureaseRequires less energy and processing steps than Portland cement. Plant derived urease is renewable amp biodegradable. Smaller CO. 2. footprint than cement+
Families of the plant which produce urease are varieties of beans in leguminous family, watermelons, squash, pumpkin and cucurbits family. The crude extract of jack bean is a good source of urease. Through plant derived urease both calcium carbonate as well as calcium phosphate cement can be produced 18. C.+
The process of EICP involves urea hydrolysis by urease produced by plant sources, including beans, leaves melon seeds, soybean and squash Eq. . The carbonate ions arising from the reaction precipitate as calcium carbonate CaCO 3 in the presence of calcium ions Eq. . 1 C O N H 2 2 2 H 2 O U r e a s e 2 N H 4 C O 3 2-2 Ca 2 ...+
Dec 20, 2019 Hamdan N, Kavazanjian Jr E, ODonnell S 2013 Carbonate cementation via plant derived urease. In Proceedings of the 18th international conference on soil mechanics and geotechnical engineering, Paris+
Actes du colloque Volume 3 page 681. 2489. Carbonate Cementation via Plant Derived Urease. Cimentation carbonat e par lutilisation dur ase issue de plantes. plantderived urease to induce carbonate cementation in sand and provide valuable insight into the factors that must be considered in.+
Jun 24, 2019 Hamdan N, Kavazanjian E, ODonnell S 2013 Carbonate cementation via plant derived urease. 18th Int. Conf. on Soil Mechanics and Geotechnical Engineering, Paris, France Inyang M, Gao B, Yao Y, Xue Y, Zimmerman AR, Pullammanappallil P, Cao X 2012 Removal of heavy metals from aqueous solution by biochars derived from anaerobically digested ...+
Fugitive dust induced by wind erosion has been a serious environmental problem in many countries. In this research, a plant-derived urease enzyme named soybean, as a cheap and easily available enzyme-induced carbonate precipitation EICP, is employed to stabilize loose soil-inducing fugitive dust. The tested silty sand soil was retrieved from one of the dust centers of Khuzestan-Iran with a ...+
Mar 01, 2012 The Bio-mimetic Technology will convert industrial waste,mainly cement waste and others by-products,into high strength,ecological cement using microbial carbonate precipitation via urea hydrolysis. Internal studies suggest that the combined use of industrial waste and the implementation of Eco-Cement technology can reduce GHGE from cement ...+
MICP is the most widely explored method. Microbes having urease activity enhance the hydrolysis of urea and it helps to control the pH and to precipitate carbonate. Although it is a widely explored bio mediated method it has some disadvantages. The plant-derived urease may offer many benefits over microbial urease to induce carbonate cementation.+
Apr 04, 2020 These results indicate that calcium carbonate content is not the sole factor which impacts the strength of biocemented sand. Additional test-tube investigation of ICP-derived CaCO 3 precipitation was used to evaluate the chemical conversion efficiency for each method, i.e., live cells i.e., Sporosarcina pasteurii or bacterial-extracted urease ...+
Biocement production from microbially induced calcium carbonate precipitation MICP is an environmentally friendly approach for construction works, but the use of calcium chloride CaCl2 in the conventional MICP process is a cost-limiting factor. The aim of this work is to develop a method for producing soluble calcium ions through two waste sources, limestone powder derived from aggregate ...+
Soil Stabilization using Calcium Carbonate Precipitation via Urea Hydrolysis Mohamed G. Arab1,2, ... EICP techniques uses free urease enzyme derived from agricultural source to catalyse the hydrolysis of ... Both cementation and densification are result of the precipitation of the carbonate+
plant-induced calcite precipitation PICP process that used urease reactive jack bean and calcium hydroxide andor calcium nitrate for sand cementation.19 Another piece of research used calcium nitrate and acetate as a calcium source to replace CaCl 2 20 as+
Beach sands are composed of a variety of minerals including quartz and different carbonate minerals. Seawater in beach sand contains several ions such as sodium, magnesium, calcium, chloride, sulfate, and potassium. These variations in mineralogy and the presence of salts in beach sand may affect the treatment via enzyme-induced carbonate precipitation EICP. In this study, set test tube ...+
Enzyme-induced carbonate precipitation EICP that relies on plant-derived urease enzyme is used to catalyze the reaction between calcium chloride and urea to precipitate calcium carbonate. The faster rate of carbonate precipitation and the absence of microbes makes this method attractive for surface applications for crack healing of concrete.+