An adsorption study of gelatin onto the Fuller's earth surfaces

Bajpai, A. K.; Vishwakarma, N.

doi:10.1002/app.21635

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…By further increase in pH, from 5 to 11, adsorption decreases. These observations are consistent with the finding of other studies [10,22,23]. It is well known that gelatin molecules achieve different charge densities and conformations at different pHs.…”

Section: Effect Of Phsupporting

confidence: 93%

“…The observed increased adsorption in the initial range of added salt may be explained by the fact that the added salt may cause neutralization of protein charge and therefore fold of the protein molecules, which results in a compact structure of gelatin. Thus, because of a reduced radii of gyration of the gelatin macromolecule, fewer active sites are occupied by the adsorbing protein molecules onto clay surface and, therefore, the gelatin adsorption increases [10]. However, at higher salt concentrations, that is, beyond 0.05 M of added salt, due to the lack of enough positive charges in gelatin, the adsorption of gelatin onto negatively charged clay surfaces decreases.…”

Section: Effect Of Salt Concentrationmentioning

confidence: 99%

“…They surveyed the adsorption process in a range of protein concentrations to determine correlations between the adsorption characteristics and sedimentation activities of the proteins [8,9]. Adsorption of gelatin onto the Fullerʼs earth surfaces [10], silver bromide [11], mica [12,13], and polystyrene latex particle [14] have been investigated and the effect of polymer concentration, pH and electrolyte on gelatin adsorption have been explored [11,12,14]. For example, Bajpai et al found that the thickness of adsorbed gelatin layer onto fuller's earth surfaces decreased with increase in gelatin concentration [10] and Kawanishi et al found that the thickness of the adsorbed gelatin layer onto mica decreased with increasing of salt concentration [12].…”

Section: Introductionmentioning

confidence: 99%

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Flocculation properties of a natural polyampholyte: The optimum condition toward clay suspensions

Nazarzadeh

Nikfarjam

Qazvini

2017

Environmental Engineering Research

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Polyelectrolytes are commonly used as flocculants in drinking water treatment. However the growing concerns about their toxicity have motivated the search for biocompatible flocculants. Here, we show that gelatin, a natural amphoteric polyelectrolyte, can be effectively adsorbed on clay surfaces and can potentially be a suitable substitute for existing flocculants. The adsorption of gelatin from its aqueous solution onto the mineral clay surfaces at different conditions was systematically investigated using the design of experiments methodology. The gelatin adsorption was found to vary considerately with pH variation showed a maximum adsorption at its isoelectric point. The amount of adsorbed gelation increased with increasing pH from 3 to 5, attained a maximum at pH 5 and then decreased with increasing pH from 5 to 11. Similarly, the amount of adsorbed gelatin showed decreasing trends around salt concentration of 0.05 M and temperature 35°C. On the other hand, the adsorption was continuously increased with time and polymer concentration in the range of 0.1-0.9 mg/dL. Finally, the jar tests confirmed the ability of gelatin for using a natural flocculant for water treatment.

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Section: Effect Of Phsupporting

confidence: 93%

Section: Effect Of Salt Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flocculation properties of a natural polyampholyte: The optimum condition toward clay suspensions

Nazarzadeh

Nikfarjam

Qazvini

2017

Environmental Engineering Research

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“…The reinforcement of the organic‐inorganic interfaces and the specific renaturation of macromolecules are suggested to originate from molecular alignment and structural complementarity between the triple helix of gelatin and sepiolite surfaces (Figure d). The mineral surfaces shift the equilibrium towards gelatin‘s crystalline structure in course of the thermal transition, which might elucidate the pH and temperature dependent trends of gelatin adsorption to raw clay particles …”

Section: Pathways Towards Functional Materialsmentioning

confidence: 99%

From Solute, Fluidic and Particulate Precursors to Complex Organizations of Matter

Rao

Cölfen

2018

The Chemical Record

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The organization of matter from its constitutive units recruits intermediate states with distinctive degrees of self-association and molecular order. Existing as clusters, droplets, gels as well as amorphous and crystalline nanoparticles, these precursor forms have fundamental contributions towards the composition and structure of inorganic and organic architectures. In this personal account, we show that the transitions from atoms, molecules or ionic species to superstructures of higher order are intertwined with the interfaces and interactions of precursor and intermediate states. Structural organizations distributed across different length scales are explained by the multistep nature of nucleation and crystallization, which can be guided towards functional hybrid materials by the strategic application of additives, templates and reaction environments. Thus, the non-classical pathways for material formation and growth offer conceptual frameworks for elucidating, inducing and directing fascinating material organizations of biogenic and synthetic origins.

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“…[5] Crosslinking of gelatin can be achieved using various crosslinkers such as genipine, carbodiimide, N-hydroxysuccinimide, etc. [6] Gelatin has been extensively explored for its application as a carrier system for drugs, proteins, genes and vaccines which are well reviewed by N. Sahoo et. al.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Investigation of Controlled Release of Ciprofloxacin and Its β‐Cyclodextrin Inclusion Complex from Gelatin Grafted Poly(vinyl alcohol) (GPVA) Nanoparticles

2019

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Controlled drug delivery is one of the probable answers to different problems associated with conventional dosing regimens. Ciprofloxacin (CFX) is an antibiotic, signifying second generation fluoroquinolone which is active against wide‐ranges of microbes. Due to low solubility and bioavailability, it requires a controlled release device for its delivery. An attempt has been made in the present work to develop gelatin grafted poly (vinyl alcohol) (GPVA) hydrogel nanoparticle and study the release behaviour of CFX when incorporated as β‐cyclodextrin CFX inclusion complex and pure CFX. GPVA hydrogel nanoparticles were prepared using two‐step desolvation method and characterized using FTIR, DLS, SEM, and XRD. The in‐vitrorelease at different physiological pH 1.2, 6.8 and 7.4 showed a controlled release of drug from the system when gelatin is grafted with PVA and when an inclusion complex of the drug is introduced in the polymer system. The release kinetic followed zero order with non Fickian Super case II transport mechanism.

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An adsorption study of gelatin onto the Fuller's earth surfaces

Cited by 5 publications

References 20 publications

Flocculation properties of a natural polyampholyte: The optimum condition toward clay suspensions

Flocculation properties of a natural polyampholyte: The optimum condition toward clay suspensions

From Solute, Fluidic and Particulate Precursors to Complex Organizations of Matter

In Vitro Investigation of Controlled Release of Ciprofloxacin and Its β‐Cyclodextrin Inclusion Complex from Gelatin Grafted Poly(vinyl alcohol) (GPVA) Nanoparticles

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