Keratin and Chitosan Biosorbents for Wastewater Treatment: A Review

Saha, Sarthak; Zubair, Muhammad; Khosa, Muhammad Arshad; Song, Sandra; Ullah, Aman

doi:10.1007/s10924-019-01439-6

Cited by 67 publications

(27 citation statements)

References 115 publications

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“…2(e) shows the selected area electron diffraction (SAED) pattern of silver NPs with fringes and bright circular rings corresponding to the (111), (200), (220) and (311) planes of silver showing that these NPs are highly crystalline in nature. 35 The DLS measurement also conrmed the average size of the Ag NPs/Ino was about the same as the results obtained with TEM (shown in Fig. 2(f)).…”

Section: Characterization Of Ag Nps/ino and Zno Npssupporting

confidence: 81%

The direct-writing of low cost paper based flexible electrodes and touch pad devices using silver nano-ink and ZnO nanoparticles

et al. 2019

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We report a novel and simple approach for the synthesis of silver nanoparticles capped with inositol (Ag NPs/ Ino) by the reduction of silver salt with ascorbic acid under basic conditions. UV-vis, TEM, FTIR and TGA techniques were used to characterize the Ag NPs/Ino to determine the size, shape and surface modification of the NPs. Stable silver nano-ink was prepared in aqueous solution containing 1% PVP (stabilizer) and glycerol (cosolvent) and was used for the direct-writing of a paper electrode with a roller ball-point pen for electrochemical applications. The solvent, stabilizing agents, concentration of NPs (10%), paper substrate, sintering temperature (40 C) and sintering time (15 min) were optimized to obtain a uniform coating of Ag NPs on the paper substrate. Further, the synthesis and fabrication of ZnO NPs on a paper substrate was put forward to design a touch pad device based on the piezoelectric effect. The preparation of paper based devices suggests a direction for the development of a simple, low cost and compatible approach for the direct-writing of paper based flexible electrodes and electronics for future applications. Fig. 3 (a) FTIR spectra of Ag NPs/Ino before and after sintering and (b) TGA analysis of Ag NPs/Ino performed over the temperature range of 0 to 800 C with an increase of 10 C min À1 .

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Section: Characterization Of Ag Nps/ino and Zno Npssupporting

confidence: 81%

The direct-writing of low cost paper based flexible electrodes and touch pad devices using silver nano-ink and ZnO nanoparticles

et al. 2019

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“…Chitosan is an abundantly biopolymer consisting of linear chains (1 → 4) of bound 2-amino-2-deoxy-β-D-glucopyranose, which is obtained by varying the deacetylation rate of chitin, if DA <50%, the compound can be called chitosan [93]. Chitin is a linear polysaccharide composed of (poly-β-(1,4) -N-acetyl-dglucosamine), it is the second most abundant natural biopolymer [94], the presence of functional groups in the chemical structure of chitosan and chitin has allowed its study in numerous applications as an additive for water treatment, biodegradable adhesive tape sensitive to pressure, chelating agent, drug transporter, wound healing agents, in membranes, among others [95], the use of chitosan and chitin in the removal of metal ions [96,97] has been studied, this is due to the presence of functional groups in the chemical structure of chitosan and chitin to interact with metal cations , due to the pair of free electrons in the nitrogen of the amino group and the presence of hydroxyl groups in the chitosan.…”

Section: Removal Of Metal Ions By Chitin and Chitosanmentioning

confidence: 99%

Biopolymers Applied to Remove Metal Ions Through Ultrafiltration. A Review

Sánchez

Butter

Rivas³

2020

J. Chil. Chem. Soc.

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This manuscript is an overview of the versatile biopolymer materials alginic acid, carboxymethyl cellulose, and quaternized chitosan which contain different functional groups to remove hazardous inorganic species. These bioadsorbents are completely water-soluble and have a high versatility to achieve a higher sorption capacity and efficiency under different experimental conditions in combination with ultrafiltration membranes through the liquid-phase polymer-based retention (LPR) technique. In general, thesebioadsorbents are friendly with the environment and have a higher biodegradability compared with those more employed synthetic polymers.

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“…Among natural resources, keratinous materials can be used as biosorbents, either directly or after activation, to remove heavy metal ions due to their intricate networks characterized by high stability, insolubility in water, and high surface area containing many carboxyl, amido, and sulfur functional groups [18]. In addition, keratin is an abundant nonfood protein; in fact, it is the major component of wool, hair, horns, nails, and feathers.…”

Section: Introductionmentioning

confidence: 99%

Use of Chemically Treated Human Hair Wastes for the Removal of Heavy Metal Ions from Water

Zhang

Carrillo-Navarrete

López‐Mesas

et al. 2020

Water

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Human hair is considered a ubiquitous waste product and its accumulation can cause environmental problems. Hence, the search for alternatives that take advantage of this waste as a new raw material is of interest, and contributes to the idea of the circular economy. In this study, chemically modified human hair was used as a low cost biosorbent for the removal of heavy metal ions from aqueous solutions. The effect of the contact time, the pH, and the biosorbent concentration on the biosorption process were investigated. Kinetic modeling indicated that the pseudo-second order kinetic equation fitted well with R2 > 0.999. Furthermore, the equilibrium data fitted the Langmuir adsorption isotherm at 295 K resulting in saturation concentrations of 9.47 × 10−5, 5.57 × 10−5, 3.77 × 10−5, and 3.61 × 10−5 mol/g for the sorption of Cr(III), Cu(II), Cd(II), and Pb(II), respectively. The biosorption process did not change the chemical structure and morphology of the hair, which was shown by FTIR and SEM. In addition, desorption experiments prove that 0.1 mol/L EDTA solution is an efficient eluent for the recovery of Pb(II) from the treated human hair. To summarize, treated human hair showed satisfactory biosorption capacity and can be considered as an effective biosorbent for the treatment of water with a low concentration of heavy metal ions.

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Keratin and Chitosan Biosorbents for Wastewater Treatment: A Review

Cited by 67 publications

References 115 publications

The direct-writing of low cost paper based flexible electrodes and touch pad devices using silver nano-ink and ZnO nanoparticles

The direct-writing of low cost paper based flexible electrodes and touch pad devices using silver nano-ink and ZnO nanoparticles

Biopolymers Applied to Remove Metal Ions Through Ultrafiltration. A Review

Use of Chemically Treated Human Hair Wastes for the Removal of Heavy Metal Ions from Water

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