Cross-linking of biopolymers for stabilizing earthen construction materials

Muguda, Sravan; Hughes, PN; Augarde, Charles E.; Perlot, Céline; Bruno, Agostino Walter; Gallipoli, Domenico

doi:10.1080/09613218.2021.2001304

Cited by 16 publications

(12 citation statements)

References 34 publications

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“…The ability to create cross-linking networks enables the biopolymers to encapsulate the contaminants. The cross-linking of biopolymers also improves the mechanical properties of soils and the durability of earthen construction materials [ 87 ]. Since the polysaccharide chains bind both the metallic ions and soil particles, they can stabilize metals in subsurface soils by trapping the contaminants in stable complexes, while enhancing the soil properties.…”

Section: Chemical Properties Of Xanthan and Gellan Associated With Th...mentioning

confidence: 99%

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

et al. 2022

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Biosorption is considered an effective technique for the treatment of heavy-metal-bearing wastewaters. In recent years, various biogenic products, including native and functionalized biopolymers, have been successfully employed in technologies aiming for the environmentally sustainable immobilization and removal of heavy metals at contaminated sites, including two commercially available heteropolysaccharides—xanthan and gellan. As biodegradable and non-toxic fermentation products, xanthan and gellan have been successfully tested in various remediation techniques. Here, to highlight their prospects as green adsorbents for water decontamination, we have reviewed their biosynthesis machinery and chemical properties that are linked to their sorptive interactions, as well as their actual performance in the remediation of heavy metal contaminated waters. Their sorptive performance in native and modified forms is promising; thus, both xanthan and gellan are emerging as new green-based materials for the cost-effective and efficient remediation of heavy metal-contaminated waters.

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Section: Chemical Properties Of Xanthan and Gellan Associated With Th...mentioning

confidence: 99%

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

et al. 2022

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“…The incorporation of natural polymers for stabilizing earth has long been a practice embedded in construction traditions. The extensive research conducted over the past two decades has consistently demonstrated the capacity of these materials to enhance the mechanical properties, permeability, and water resistance of earth [ 66 , 68 , 69 , 70 , 71 , 72 , 73 , 74 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Cappai,

Shoukat,

Pilia

et al. 2024

Materials

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The fight against climate change has delineated new objectives, among which one of the most crucial is the replacement of high-energy-intensity materials in the construction sector with more sustainable and thermally efficient alternatives to reduce indirect emissions. Consequently, the thermal properties of materials assume fundamental importance. In this regard, the large-scale use of earth represents a promising option, not only due to its widespread availability but especially for its minimal embodied energy. However, to enhance its durability, it is necessary to stabilize the mixtures of raw materials. This study analyzes experimental systems based on earth stabilized with bio-based polymers to evaluate their thermal properties and how these vary depending on the selected mix-design. The experimental measurements showed thermal properties comparable to conventional materials. As expected, thermal conductivity increases when porosity decreases. The minimum value is equal to 0.216 W/m·K vs. a porosity of 43.5%, while the maximum is 0.507 W/m·K vs. a porosity of 33.2%. However, the data obtained for individual systems may vary depending on the topological characteristics, which were analyzed through a model for granular materials. The modeling suggests correlations between microstructures and thermal behaviour, which can be useful to develop tools for the mix-design procedure.

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“…Earth-based building materials can be described as natural concrete, composed of aggregates, such as sand or gravel, and a binder, clay minerals [7,8]. To be used in a more standardized way, industries and researchers are interested in stabilizing earth-based building materials to increase their mechanical strength and durability [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Strengthening mechanisms of clay building materials by starch

Tourtelot,

d'Espinose de Lacaillerie,

Duc

et al. 2023

Construction and Building Materials

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Cross-linking of biopolymers for stabilizing earthen construction materials

Cited by 16 publications

References 34 publications

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Strengthening mechanisms of clay building materials by starch

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