Applicability of biocementation for organic soil and its effect on permeability

Sidik, Waleed; Çanakçı, Hanifi; Kılıç, İbrahim Halil; Çeli̇k, Fatih

doi:10.12989/gae.2014.7.6.649

Cited by 31 publications

(8 citation statements)

References 22 publications

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“…Floc structure affects the final sedimentation thickness and densities (Sidik et al 2014). At small concentrations of ε-polylysine, the dominant structure of flocs was an edge to face structure.…”

Section: Discussionmentioning

confidence: 99%

ε-polylysine biopolymer for coagulation of clay suspensions

Kwon¹,

Im²,

Chang³

et al. 2017

Geomech. Eng.

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The coagulation or flocculation of cohesive clay suspensions is one of the most widely used treatment technologies for contaminated water. Flocculated clay can transport pollutants and nutrients in ground water. Coagulants are used to accelerate these mechanisms. However, existing coagulants (e.g., polyacrylamide, polyaluminum chloride) are known to have harmful effects in the environment and on human health. As an alternative, eco-friendly coagulant, this study suggests ε-polylysine, a cationic biopolymer fermented by Streptomyces. A series of sedimentation experiments for various ε-polylysine concentrations were performed, and the efficiency of sedimentation with ε-polylysine was estimated by microscopic observation and light absorbance measurements. Two types of sedimentation were observed in the experiments: accumulation sedimentation (at 0.15%, 0.20%, 0.25% ε-polylysine) and flocculation sedimentation (at 0%, 0.1%, 0.5%, 1.0%, 2.0% ε-polylysine). These sedimentation types occur as a result of the concentration of counter ions. Additionally, the performance of εpolylysine was compared with that of a previously used environmentally friendly coagulant, chitosan. The obtained results indicate that flocculation sedimentation is appropriate for contamination removal and that ε-polylysine functions more efficiently for clay removal than chitosan. From the experiments and analysis, this paper finds that polylysine is an alternative eco-friendly coagulant for removing chemical contaminants in groundwater.

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Section: Discussionmentioning

confidence: 99%

ε-polylysine biopolymer for coagulation of clay suspensions

Kwon¹,

Im²,

Chang³

et al. 2017

Geomech. Eng.

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“…7 The former consists of microbial induction of calcite formation, which lls the pores between soil particles and bind them together, [7][8][9][10] while the latter targets reducing the soil porosity and hydraulic activity by microbial production of pore lling materials such as polymers. 6,7,[10][11][12][13] Biocementation is considered a cheaper and more environment-friendly alternative to the traditional soil stabilization techniques which are done either chemically using lime, cement, epoxy and polyurethane or mechanically by compaction, in spite of their high cost, energy and time consumption. 1,4,5,[14][15][16][17] It also ensures high sustainability as stabilized roads by this technology can last for more than 50 years.…”

Section: Introductionmentioning

confidence: 99%

“…Ca 2+ + CO 3 2À / CaCO 3 (2) Biocementation has a wide range of applications in geotechnical engineering such as repairing cracks and concrete, treatment of cement surface, consolidation of sand, and lling the pores between soil particles for soil stabilization. [11][12][13][20][21][22] Lately, its use in natural repairing of heritage stone artworks has been reported. 23 However, although numerous studies have considered the use of the whole microorganism for in situ induction of calcite formation, 6,9,24,25 only few considered the use of commercially available ureases.…”

Section: Introductionmentioning

confidence: 99%

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

et al. 2019

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“…However, the supply of cement is severely restricted in underdeveloped countries (mostly in Africa) and high amounts of greenhouse gases are emitted during its production (Chang et al 2015b). Thus, various strategies are being pursued to develop alternative soil binders and application methods to reduce the usage of cement in light of sustainability concerns (Chang et al 2016b, Mitchell and Santamarina 2005, Sidik et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Dynamic properties of gel-type biopolymer-treated sands evaluated by Resonant Column (RC) Tests

Im¹,

Tran²,

Chang³

et al. 2017

Geomech. Eng.

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Due to numerous environmental concerns in recent years, the search for and the development of sustainable technologies have been pursued. In particular, environmentally friendly methods of soil improvement, such as the potential use of biopolymers, have been researched. Previous studies on the use of biopolymers in soil improvement have shown that they can provide substantial strengthening efficiencies. However, in order to fully understand the applicability of biopolymer treated soils, various properties of these soils such as their dynamic properties must be considered. In this study, the dynamic properties of gel-type biopolymer treated soils were observed through the use of resonant column tests. Gellan gum and Xanthan gums were the target gel-type biopolymers used in this study, and the target soil for this study was jumunjin sand, the standard sand of Korea. Through this study it was demonstrated that biopolymers can be used to enhance the dynamic properties of the soil, and that they offer possibilities of reuse to reduce earthquake related soil failures.

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Applicability of biocementation for organic soil and its effect on permeability

Cited by 31 publications

References 22 publications

ε-polylysine biopolymer for coagulation of clay suspensions

ε-polylysine biopolymer for coagulation of clay suspensions

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

Dynamic properties of gel-type biopolymer-treated sands evaluated by Resonant Column (RC) Tests

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