Freundlich adsorption isotherms of agricultural by-product-based powdered activated carbons in a geosmin–water system

Ng, Chilton; Losso, Jack N.; Marshall, Wayne E.; Rao, R. Shyama Prasad

doi:10.1016/s0960-8524(02)00093-7

Cited by 307 publications

(126 citation statements)

References 16 publications

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“…The equilibrium adsorption constant can be determined by different methods. Other models such as the Freundlich model are more suitable for use with heterogeneous surfaces, but can only describe adsorption data over a restricted range (Ng et al 2002) …”

Section: Bsa Adsorption Isotherms: Langmuir and Freundlich Modelsmentioning

confidence: 99%

The competitive adsorption of human proteins onto natural-based biomaterials

Alves

Reis

Hunt

2010

J. R. Soc. Interface.

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This study aims to further the understanding of nanoscale structures relevant for cellular recognition on contact and interaction with natural-based materials. The correlation between surface characteristics and protein adsorption from unitary and complex protein systems was investigated with respect to altering the bulk chemistry of the substrate material. Polymeric blends of starch and cellulose acetate, polycaprolactone (SPCL) and ethylene vinyl alcohol (SEVA-C) were used. Different proteins, bovine serum albumin, human serum albumin (HSA) and human fibronectin (HFN), were selected for this study. The construction of adsorption isotherms is an important starting point towards characterizing the interactions between surfaces and proteins. In this study, albumin adsorption isotherms fit the Freundlich model and were correlated with the chemistry and morphology of surfaces. In addition, protein distribution, quantification and competition were measured using fluorimetry and visualized by confocal microscopy. The analysis of unitary systems demonstrated that the adsorption of HSA was generally lower than that of HFN. In the latter case, SPCL and SEVA-C blends reached adsorption values of 97 and 89 per cent, respectively. In studying the co-adsorption of proteins, an increase in both HSA and HFN on SEVA-C surfaces was observed. SPCL showed no substantial increase in the adsorption of the proteins in competitive conditions. The similarity of these materials with other polysaccharide-based materials increases the relevance of the presented results. This study provides valuable information for the development of strategies towards the control of protein orientation and functionality as the availability of cell signalling epitopes for a broader family of materials that continue to be a significant component of this field of research.

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Section: Bsa Adsorption Isotherms: Langmuir and Freundlich Modelsmentioning

confidence: 99%

The competitive adsorption of human proteins onto natural-based biomaterials

Alves

Reis

Hunt

2010

J. R. Soc. Interface.

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“…Effluents discharged from the dyeing industries are highly coloured with huge amount of suspended organic solid which maybe toxic, mutagenic or carcinogenic [3][4][5]. Other harmful effects of dyes have been extensively reviewed [6][7][8]. The discharge of these untreated coloured effluents into receiving water bodies may either cause damages in aquatic or human lives [9].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Equilibrium Studies on the Removal of Methyl Red from Aqueous Solution Using White Potato Peel Powder

Enenebeaku

Okorocha

Enenebeaku

et al. 2017

ILCPA

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Abstract. The potential of white potato peel powder for the removal of methyl red (MR) dye from aqueous solution was investigated. The adsorbent was characterized by FTIR and SEM analysis. Batch adsorption studies were conducted and various parameters such as contact time, adsorbent dosage, initial dye concentration, pH and temperature were studied to observe their effects in the dye adsorption process. The optimum conditions for the adsorption of MR onto the adsorbent (WPPP) was found to be contact (80 mins), pH (2) and temperature (303 K) for an initial MR dye concentration of 50 mg/l and adsorbent dose of 1.0 g. The experimental equilibrium adsorption data of the (MR) dye fitted best and well to the Freundlich isotherm model. The maximum adsorption capacity was found to be 30.48 mg/g for the adsorption of MR. The kinetic data conforms to the pseudo-second order kinetic model.

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“…Adsorption isotherms provide information on how adsorption system progress, and indicate how efficiently a given adsorbent interacts with adsorbate 44 . Figure 6 investigates the experimental data fitting using three isotherm equations, namely, Langmuir, Freundlich, and Temkin for BY28 dye biosorption using the three isolated strains.…”

Section: Equilibrium Modelling For the Biosorption Processmentioning

confidence: 99%

Bioflocculation of Basic Dye onto Isolated Microbial Biopolymers

Elkady¹

2017

Chem.Biochem.Eng.Q.

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Three purified biopolymers isolated from Bacillus velezensis (40B), Bacillus mojavensis (32A) and Pseudomonas (38A) strains were evaluated for dye decolourization as bioflocculants. The decolourization capacity of the three polymers was inspected using C.I 28 basic yellow dye as hazardous pollutant. The chemical compositions of these purified biopolymers were considered by HPLC and FTIR spectrum. The decolourization efficiency of the three purified biopolymers was determined using both real dye polluted wastewater (discharged from AKSA EGYPT acrylic fibres industry) and simulated synthetic wastewater. The maximum decolourization efficiencies of the purified biopolymers of the three studied strains (40B), (32A) and (38A) were 91, 89 and 88 %, respectively. The equilibrium of dye sorption process onto biopolymers was described using Langmuir isotherm equation. However, its kinetics follows the pseudo second order model. The thermodynamic examination investigated the exothermic and spontaneous nature of the decolourization process using the purified biopolymers.

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Freundlich adsorption isotherms of agricultural by-product-based powdered activated carbons in a geosmin–water system

Cited by 307 publications

References 16 publications

The competitive adsorption of human proteins onto natural-based biomaterials

The competitive adsorption of human proteins onto natural-based biomaterials

Adsorption and Equilibrium Studies on the Removal of Methyl Red from Aqueous Solution Using White Potato Peel Powder

Bioflocculation of Basic Dye onto Isolated Microbial Biopolymers

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