A novel approach on leaching study for removal of toxic elements from thermal power plant-based fly ash using natural bio-surfactant

Das, S.; Dan, Aritra Kumar; Behera, Umakanta; Tripathi, Ankit Kumar; Behari, Mandakini; Das, Dillip Kumar; Parhi, Pankaj Kumar

doi:10.1016/j.cscee.2021.100156

Cited by 25 publications

(7 citation statements)

References 34 publications

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“…As of now, some studies have been accomplished on the dispersion and stabilization of solid–liquid suspensions using green natural dispersants (surfactants) which also have diverse applications such as in slurry transportation and leaching, elimination of toxic heavy metals from solid phase, and degumming. − According to the interaction mechanism between the dispersant and dispersed phase, the molecular structures of natural substances are selected and modified to achieve high performance, which is of great reference value for the structure design of dispersants for CWS.…”

Section: Structure and Properties Of Anionic Dispersants For Cwsmentioning

confidence: 99%

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Feng

et al. 2023

Energy Fuels

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Dispersants are chemical moieties that modify interfacial characteristics by adsorption at the solid–liquid interface, and they have been widely used in modern industrial production. This review focuses on the research and perspectives of anionic dispersants for coal–water slurry (CWS). Various common anionic dispersants are briefly summarized, including natural and synthetic species. The interactions between coal particles in the CWS suspension, including van der Waals attraction and electrostatic repulsion, are described by the DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. Due to the hydrophobic interaction and the steric effect resulting from the adsorption of polymer dispersants, the extended DLVO theory is introduced to elucidate the various interactions in the CWS system. Based on the interactions between the coal particles, the adsorption behaviors at the coal–water interface, and the interactions between coal and water, the dispersion and stabilization mechanisms are systematically and theoretically discussed. According to the variations of interaction energies between the coal particles, the use of anionic polymer dispersants can weaken the hydrophobic attraction and enhance the steric hindrance and electrostatic repulsion. Also, the rheological behaviors of CWSs are outlined, with emphasis on the pipeline transportation of CWS and the three-parameter Herschel–Bulkley model. Additionally, the properties of anionic dispersants for CWS can be improved by adjusting their chemical structures such as molecular weight, side chain length, rigidity and flexibility of the molecular chain, and variety, quantity, position, and proportion of hydrophobic and hydrophilic groups. In view of the relationships between the structure and property, a direction on the selection and preparation of dispersant for CWS is suggested. Finally, the current challenges and future perspectives of dispersants for CWS are put forward.

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Section: Structure and Properties Of Anionic Dispersants For Cwsmentioning

confidence: 99%

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Feng

et al. 2023

Energy Fuels

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“…The plant origin bio-surfactants like Sapindus mukorosssi, Sapindus laurifolia, Acacia concinna, and Acacia auriculiformis due to their amphiphilic nature have been widely applied in various types of application such as surface modification of coal and fly ash in the preparation of slurry [52][53][54][55][56][57], dye degradation [58], removal of toxic elements from fly ash to prepare various composite materials [59,60] and solubilization, of organic compound in functional group interconversion process [61,62]. However their application in surface modification of silk surface is scanty.…”

Section: Bio-surfactantmentioning

confidence: 99%

Extraction of Silk Fibroin with Several Sericin Removal Processes and its Importance in Tissue Engineering: A Review

et al. 2022

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Sericin is a sticky protein substance, which is generated by the silk-worm for holding the filaments of silk tightly. The main constituent of natural crude silk is made up of sericin and fibroin. Fibroin and sericin play a vital role in increasing the strength, stiffness and on maintaining the constructional integrality of the cocoon. This review reports the role of several types of degumming agents for the removal of sericin from silk surfaces and an overview of silk fibroin approaches in the tissue engineering field. The prime factors responsible for the removal of sericin (degumming) from silk were systematically analyzed and discussed. The key factors affects on modification of the silk surface are includes surfactant, degumming time, temperature, advanced techniques such as ultra-sonication, microwave radiation, infrared radiation, low-temperature oxygen plasma radiation, and PH. These factors influence either individually or cumulatively at the degumming process. Tissue engineering is an emanate and most optimistic approach to restore tissue malfunction by adopting the concept of the technology being practiced using numerous biomaterials, cells, and the nutrient-specific growth factors. Different types of materials include various bio-material and mainly of silk fibroin constituent of it is conceding most optimistic biomaterials in tissue engineering application. Silk fibroin is a naturalistic protein-based polymer with an eminent physiochemical characteristic, are magnificent biocompatibility, amenable biodegradability, proper oxygen, and water-vapor permeability, and least inflammatory reaction. The critical studies accomplishing on the role of Silk fibroin and various approaches adopted in the degumming process is extensively reviewed and reported.

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“…The fundamental requirement of the slurry stabilization through dispersant (surfactant) development is, therefore, to promote a solid–water interaction over a solid–solid interaction. Solid particles such as coal, fly ash, , or clay have both hydrophobic and hydrophilic regions. The surface charge of the naked solid particles, surface chemical alterations resulting from the adsorption of surfactant, and the orientation/organization of surfactant at the solid–water interface usually decide the nature of the solid surface.…”

Section: Surfactants Used In Different Types Of Slurry Stabilizationmentioning

confidence: 99%

Influence of Surfactant for Stabilization and Pipeline Transportation of Iron Ore Water Slurry: A Review

Behari

Das²,

Mohanty

2022

ACS Omega

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Iron ore is generally transported using a traditional method that releases significant amounts of dust into the environment. In contrast, the pipeline transportation of slurry is noticeably a sustainable approach for efficiently transporting iron ore by reducing the environmental pollution. The interparticle interaction of the iron ore particles should be mutually repulsive for steady dispersion. Surfactants and polymers adsorb efficiently at the solid/liquid interface due to their amphiphilic character, rendering the surface hydrophilic or hydrophobic to create a stable dispersion. The present review discusses the interaction of surfactants on the stabilization of solid particles for the ease of pipeline transportation using various types of stabilization mechanisms. In addition to the effect of surfactant alone, its combination with some other parameters such as particle size distribution, temperature, solid concentration, etc. has been discussed. The review also describes the detailed classification of iron ore, surfactant, and characteristic properties of surfactants.

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A novel approach on leaching study for removal of toxic elements from thermal power plant-based fly ash using natural bio-surfactant

Cited by 25 publications

References 34 publications

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Extraction of Silk Fibroin with Several Sericin Removal Processes and its Importance in Tissue Engineering: A Review

Influence of Surfactant for Stabilization and Pipeline Transportation of Iron Ore Water Slurry: A Review

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