Biopolymer-clay nanocomposites as novel and ecofriendly adsorbents for environmental remediation

Orta, María del Mar; Martín, Julia; Santos, Juan Luís; Aparicio, Irene; Medina-Carrasco, Santiago; Alonso, Esteban

doi:10.1016/j.clay.2020.105838

Cited by 83 publications

(23 citation statements)

References 125 publications

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“…Among inorganic materials, layered materials are considered with the capacity to intercalate biopolymers. In adsorption experiments using spectroscopy with biopolymer-clay composites, 96 mg/g of quantity organic or inorganic pollutants are removed from the water when clopyralid is used as the analyte [46,47]. The interaction of polysaccharide -fibrous clay compounds characteristics is analyzed using spectroscopy and based on the results the polymerization reaction or the synthesizing techniques have been enhanced to improve the chemical properties of fibrous clay -polysaccharide mixture.…”

Section: Spectroscopic Analysismentioning

confidence: 99%

Polysaccharide-Fibrous Clay Bionanocomposites and their Applications

Ramesh

2022

Materials Research Foundations

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Bionanocomposites are multifunctional materials, which contain biological origin and particles, have nanometer-scale dimensions (1–100 nm) and can be employed in a vast range of applications in fields like tissue engineering, electronic appliances, biosensors, regenerative medicine, drug delivery systems and food packaging due to their remarkable advantage of exhibiting biocompatibility, antibacterial activity, and biodegradability. To develop naturally biodegradable materials like bionanocomposites, several biopolymers are employed in recent years. Polysaccharides are made up of sugar molecules linked together by glycosidic bonds. These polymeric carbohydrates, which are the most prevalent polymers in nature, are gaining interests as a feasible replacement for synthetic polymers in nanocomposite materials manufacturing. Polysaccharides are promising matrix for the production of green nanocomposites due to their biodegradable nature and biocompatible qualities, hierarchical structure, and high film-forming ability. This chapter discusses the processing, properties, characterisation, and applications of bio-based nanocomposites with various polysaccharides functionalized by various nanofillers.

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Section: Spectroscopic Analysismentioning

confidence: 99%

Polysaccharide-Fibrous Clay Bionanocomposites and their Applications

Ramesh

2022

Materials Research Foundations

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“…Three forms of NCs -phase separated structure, intercalated structure and exfoliated structures are formed (Fig. 10) [2].…”

Section: Synthesis Of Kaolinite-starch Nano-compositesmentioning

confidence: 99%

“…Clay is a natural mineral, consisting of layers of linked silicate tetrahedral and octahedral units. About 30 types of nanoclays are known and have different mineralogical composition with different properties [2]. Classifications are mainly based on various combinations of sheets of octahedral and tetrahedral silicate and their stacking.…”

Section: Introductionmentioning

confidence: 99%

Kaolinite-Starch based Nano-Composites and Applications

Gupta

2022

Advanced Applications of Micro and Nano Clay

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Starch and kaolinite are low cost and easily available materials used in different domains. At the same time, they form biodegradable nanocomposites (NCs), attractive and important substitutes for non-biodegradable materials which are the major source of environmental pollution. Kaolinite-starch based NCs are promising materials because they possess good mechanical and thermal properties and water resistance capacity etc. Properties are dependent on the filler particles orientation, nature of kaolinite and starch interaction, filler–matrix interface and filler dosages. The properties also depend on the anisotropy of the particles of fillers, their surfaces and the filler dispersion. These NCs have enormous applications specially in food packaging, films, paper, etc. It is used in environmental remediation. In this chapter an overview of methods of preparation, characterization and applications of kaolinite-starch based nanocomposites have been discussed.

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“…This OIMC divergence might be due to the variation of consistency of biopolymer-soil matrix. XG molecules have abundant hydrophilic groups (e.g., -OH and -COOH) and therefore are capable of attracting water molecules and retaining water [29,31,[69][70][71]. As a result, elevating the XG content from 1 to 5% raised the amount of absorbed water that was needed to achieve the optimum reinforcing effect.…”

Section: Effect Of Initial Moisture Contentmentioning

confidence: 99%

The Optimisation Analysis of Sand-Clay Mixtures Stabilised with Xanthan Gum Biopolymers

Hao

Chen

et al. 2021

Sustainability

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Sand–clay mixtures can be encountered in both natural soils (e.g., residual soils, clay deposits and clinosols) and artificial fills. The method of utilising biopolymers in ground improvement for sand–clay mixtures has emerged recently. However, a full understanding of the strengthening effect of biopolymer-treated sand–clay mixtures has not yet been achieved due to a limited number of relevant studies. In this study, xanthan gum (XG), as one of the eco-friendly biopolymers, was used to treat reconstituted sand–clay mixtures that had various compositions in related to clay (or sand) content and clay type (kaolin and bentonite). A series of laboratory unconfined compression strength (UCS) tests were conducted to probe the performances of XG-treated sand–clay mixtures from two aspects, i.e., optimum treatment conditions (e.g., XG content and initial moisture content) to achieve the maximum strengthening effect and strengthening efficiency for the sand–clay mixtures with different compositions. The experimental results indicated that the optimum initial moisture content decreased as the sand content increased. The optimum XG content, which also decreased with the increasing sand content, remained approximately 3.75% for all sand–kaolin mixtures and 5.75% for all sand–bentonite mixtures if calculated based on clay fraction. While untreated sand–kaolin mixtures and sand–bentonite mixtures had comparable UCS values, XG-treated sand–kaolin mixtures seemed to have better improved mechanical strength due to higher ionic (or hydrogen) bonds with XG and low-swelling properties compared with bentonite. The deformation modulus of XG-treated sand–clay mixtures were positively related with UCS. The variation in UCS and stiffness for each treatment condition increased as the sand content was elevated for both sand-kaolin and sand-bentonite mixtures. An increment in the proportion of the heterogeneous composite formed by irregular sand particles conglomerated with the XG–clay matrix in total soil might be responsible for this phenomenon.

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Biopolymer-clay nanocomposites as novel and ecofriendly adsorbents for environmental remediation

Cited by 83 publications

References 125 publications

Polysaccharide-Fibrous Clay Bionanocomposites and their Applications

Polysaccharide-Fibrous Clay Bionanocomposites and their Applications

Kaolinite-Starch based Nano-Composites and Applications

The Optimisation Analysis of Sand-Clay Mixtures Stabilised with Xanthan Gum Biopolymers

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