Calcium acetate as calcium source used to biocement for improving performance and reducing ammonia emission

Xiang, Junchen; Qiu, Jingping; Wang, Yuguang; Gu, Xiaowei

doi:10.1016/j.jclepro.2022.131286

Cited by 46 publications

(10 citation statements)

References 40 publications

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“…In previous studies [ 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 ], a variety of methods have been used to reduce the ammonium from soil. The most effective method for removing ammonia is the flushing/rinsing method with a reduction rate of 99.8% in aqueous NH 4 + .…”

Section: Existing Methods Of Soil Improvementmentioning

confidence: 99%

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State-of-the-Art Review on Engineering Uses of Calcium Phosphate Compounds: An Eco-Friendly Approach for Soil Improvement

2022

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Greenhouse gas emissions are a critical problem nowadays. The cement manufacturing sector alone accounts for 8% of all human-generated emissions, and as the world’s population grows and globalization intensifies, this sector will require significantly more resources. In order to fulfill the need of geomaterials for construction and to reduce carbon dioxide emissions into the atmosphere, conventional approaches to soil reinforcement need to be reconsidered. Calcium phosphate compounds (CPCs) are new materials that have only recently found their place in the soil reinforcement field. Its eco-friendly, non-toxic, reaction pathway is highly dependent on the pH of the medium and the concentration of components inside the solution. CPCs has advantages over the two most common environmental methods of soil reinforcement, microbial-induced carbonate precipitation (MICP) and enzyme induced carbonate precipitation (EICP); with CPCs, the ammonium problem can be neutralized and thus allowed to be applied in the field. In this review paper, the advantages and disadvantages of the engineering uses of CPCs for soil improvement have been discussed. Additionally, the process of how CPCs perform has been studied and an analysis of existing studies related to soil reinforcement by CPC implementation was conducted.

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Section: Existing Methods Of Soil Improvementmentioning

confidence: 99%

“…By adding the Gram-positive lactic acid bacterium Pediococcus acidilactici , 38% of emission reductions can be achieved [ 58 ]. It has been proven that the use of calcium acetate as a calcium source for MICP could reduce NH 3 emissions by 54.2% [ 59 ].…”

Section: Existing Methods Of Soil Improvementmentioning

confidence: 99%

State-of-the-Art Review on Engineering Uses of Calcium Phosphate Compounds: An Eco-Friendly Approach for Soil Improvement

2022

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“…The study demonstrated that these ions, in combination with soybean meal solution, boosted bacterial survival and CaCO 3 precipitation within mortar cracks. Xiang et al (2022) tested CaCl 2 , calcium acetate, and Ca(NO 3 ) 2 on bio-cement. Calcium acetate was the best source of biocement compared to the other two nutrients.…”

Section: Types Of Nutrientsmentioning

confidence: 99%

A review of durability improvement in concrete due to bacterial inclusions

Bandlamudi

Kar²,

Dutta³

2023

Front. Built Environ.

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Since the invention of industrially produced Portland cement in the nineteenth century, concrete has been the world’s most frequently used construction material. Because of the significant CO2 emissions produced during cement manufacture and concrete maintenance and repair costs, sustainably improving concrete durability has become a topic of concern. Bacterial self-healing is a unique method that uses CaCO3 precipitation to repair cracks in concrete, thereby improving the structure’s durability. This review highlights the effect of bacterial treatment on concrete durability. The permeation properties, water absorption, and mechanical properties are assessed. Emphasis is laid on the selection of bacteria and bacteria nutrients. The paper overviews the morphological analysis of CaCO3 precipitation by bacterial concrete. Despite the benefits of bacterial technology in concrete, numerous critical concerns remain unresolved. Further investigation on nutrients is required to develop a multi-nutrient system that will improve the efficiency of bacterial precipitation since a good combination of low-cost nutrients would reduce the total cost of bacterial concrete.

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“…In these studies, CaCl 2 was found to be the optimal calcium source. Since chloride ions have little impact on sandy soil and its low cost, CaCl 2 is still the preferred calcium source for MICP (Xiang et al 2022 ). Samples treated with calcium acetate achieved higher carbonate content than samples treated with calcium chloride or calcium nitrate (Lv et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical strength however is lower which is most likely due more calcite crystals produced with calcium chloride and calcium nitrate compared to the vaterite that was formed during treatment with calcium acetate (Lv et al 2022 ). Although calcium acetate seems to be inferior as a calcium source regarding strength of treated samples Xiang et al ( 2022 ) showed that acetate ions react with NH 3 during MICP which leads to 54.2% and 51.4%, respectively reduced NH 3 emission in comparison with calcium chloride and calcium nitrate. It should be noted that the utilization of calcium acetate in a seawater environment might be preferable due to less NH 3 emission, but Peng et al ( 2022 ) found that in seawater environment calcium chloride showed 2% less calcium carbonate production compared to freshwater environment.…”

Section: Introductionmentioning

confidence: 99%

Influencing factors on ureolytic microbiologically induced calcium carbonate precipitation for biocementation

Erdmann

Strieth

2022

World J Microbiol Biotechnol

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Microbiologically induced calcium carbonate precipitation (MICP) is a technique that has received a lot of attention in the field of geotechnology in the last decade. It has the potential to provide a sustainable and ecological alternative to conventional consolidation of minerals, for example by the use of cement. From a variety of microbiological metabolic pathways that can induce calcium carbonate (CaCO3) precipitation, ureolysis has been established as the most commonly used method. To better understand the mechanisms of MICP and to develop new processes and optimize existing ones based on this understanding, ureolytic MICP is the subject of intensive research. The interplay of biological and civil engineering aspects shows how interdisciplinary research needs to be to advance the potential of this technology. This paper describes and critically discusses, based on current literature, the key influencing factors involved in the cementation of sand by ureolytic MICP. Due to the complexity of MICP, these factors often influence each other, making it essential for researchers from all disciplines to be aware of these factors and its interactions. Furthermore, this paper discusses the opportunities and challenges for future research in this area to provide impetus for studies that can further advance the understanding of MICP.

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Calcium acetate as calcium source used to biocement for improving performance and reducing ammonia emission

Cited by 46 publications

References 40 publications

State-of-the-Art Review on Engineering Uses of Calcium Phosphate Compounds: An Eco-Friendly Approach for Soil Improvement

State-of-the-Art Review on Engineering Uses of Calcium Phosphate Compounds: An Eco-Friendly Approach for Soil Improvement

A review of durability improvement in concrete due to bacterial inclusions

Influencing factors on ureolytic microbiologically induced calcium carbonate precipitation for biocementation

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