Use of chitosan for chromium removal from exhausted tanning baths

Cesaro, Raffaele; Fabbricino, Massimiliano; Lanzetta, Rosa; Mancino, Anna; Naviglio, B.; Parrilli, Michelangelo; Sartorio, Roberto; Tomaselli, M.; Tortora, Gelsomina

doi:10.2166/wst.2008.692

Cited by 11 publications

(3 citation statements)

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“…Chitosan (CS) is a linear cationic biopolymer and exhibits high adsorption capacity especially toward anionic dyes . It contains 4-linked β-2-amino-2-deoxy-glucopyranose residues, some of which are N-acetylated. − …”

Section: Fabrication Of Polysaccharide Go Nanocompositesmentioning

confidence: 99%

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

et al. 2020

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This article discusses the potential applications of natural polysaccharide-based graphene oxide nanomaterials in the field of wastewater remediation through the removal of organic and synthetic dyes. Being highly toxic, carcinogenic, and nonbiodegradable, dyes disposed from textile, paper, and printing industries etc. pose a serious threat to various life forms on earth. Recently, there has been an increased interest in the amalgamation of biopolymers, such as polysaccharides, with the high adsorption efficiency of graphene oxide. Polysaccharides, apart from being nontoxic, low cost, and eco-friendly, possess a variety of functional groups enabling them to be easily tuned for the desired applications. When grafted with GO nanosheets, they give rise to unique nanomaterials possessing diverse applications, especially in the eradication of harmful contaminants from wastewater. This review is an attempt to give consolidated and detailed information on different aspects of the adsorption behavior of various potentially low-cost polysaccharide-based GO nanoadsorbents toward lethal dyes. The characterization techniques used, adsorption isotherms, kinetics, thermodynamic behavior, recyclability, and swelling properties as well as the adsorption mechanism have been outlined in this article. The whole anthology of literature reports excellent dye removal efficiency with significant regeneration performance making these nanoadsorbents promising candidates for practical applications. In view of all aspects, this review recommends the use of such sustainable adsorbents with a further search toward obtaining the polysaccharides from natural wastes.

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Section: Fabrication Of Polysaccharide Go Nanocompositesmentioning

confidence: 99%

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

et al. 2020

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“…The BCS is a popular leather tanning agent due to its excellent thermal stability, stability against biodegradation, and fascinating dyeing capability in the final leat h er with low cost and speedy process. It is reported that only 60-70% of applied BCS is absorbed by the pelt (Ismailia et al 2005), whereas the remaining 30-40% is discharged in wastewater (Cesaro et al 2008;Religa et al 2011). The metal chromium, especially a trace amount of Cr(III) is inevitable for the metabolism of carbohydrates in humans.…”

Section: Introductionmentioning

confidence: 99%

Disparate activation routes of developing adsorbents from waste biomass: A comparative studies

Hashem

Mim

Payel

et al. 2023

Preprint

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This work investigated the convenience of thermally prepared adsorbent over chemically modified absorbent made from Carica papaya tree for chromium eradication from tannery wastewater. Chemically modified Carica papaya tree adsorbents were developed employing zinc chloride (ZnCl2), potassium hydroxide (KOH), and nitric acid (HNO3) individually followed by calcination at 600°C where, thermally modified adsorbents was prepared by direct calcination at 600°C for 3 h. The potentiality of differently prepared adsorbents was evaluated by considering their efficacy in removing chromium from wastewater as well as the process simplicity. The chromium removal efficiencies obtained for ZnCl2, KOH, HNO3 modified and thermally modified Carica papaya tree adsorbents were 71.33%, 73.58%, 76.25%, and 99.89%, respectively. The chromium adsorption on different Carica papaya tree adsorbents was assessed by Fourier Transform Infrared (FT-IR) spectroscopy and Energy-dispersive X-ray spectrometry (EDX) analysis. The optimum condition for the maximum adsorbent’s efficacy was determined by conducting the batch experiments with varying the adsorbent doses, stirring time and settling time. Results revealed the maximum chromium removal efficiency of thermally modified Carica papaya tree adsorbent was 99.88% at 0.25 g/25 mL of adsorbent dose for a 20 min stirring time. Analysis from Freundlich and Temkin isotherm revealed the adsorption reaction as an endothermic chemisorption reaction with strong interaction between the adsorbent and chromium ion. In terms of kinetics, the Pseudo 2nd order equation had the best fitting with the experimental data considering the regression coefficient value (R2 = 0.9997). Thermally modified adsorbent from agricultural waste such as Carica papaya tree can be in use to reduce pollution load from tannery wastewater.

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“…During the past years a number of sorbents have been used successfully to treat industrial and mining wastewaters, natural surface and ground waters as well as acidic mine drainages (AMD), which are highly polluted with heavy metals ions and anions 10,11) . Examples of natural and synthetic adsorbents are among others activated carbon 12) , zeolites 13,14) , various clays 15) , kaolinites 16) , metal oxides 17) , and organic compounds like chitosan 18) , sawdust 19) , and allophones 20) , solvent impregnated resins (SIR) 21) and polymeric matrices that encapsulate organic extractants in their porous structure 22,23) . Many of the adsorbents have quite distinct and different properties and adsorbent activity, which make them interesting to study.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pollutant Ions From Residual Aqueous Solutions Onto Nano-Structured Calcium Silicate

Valenzuela

Basualto

Sapag

et al. 2013

J. Chil. Chem. Soc.

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The sorption of contaminant ions existing in residual aqueous solutions onto nano-structured calcium silicate has been studied. The sorbent was prepared by chemical reaction between a soluble solution of sodium silicate and calcium hydroxide. X-ray diffraction analysis showed the amorphous character of the obtained calcium silicate, although patterns associated to wollastonite, CaSiO 3 , and larnyta-syn, Ca 2 SiO 4 were detected. The particle mean size was approximate 0.5 to 1.0 µm having an average BET surface area of 333.0 m 2 /g and a mean pore diameter variable between 15.8-23.6 nm. The nano-structured calcium silicates were contacted with industrial residual aqueous solutions containing, among others, Cu(II), Zn(II), Cd(II) and the anions PO 4 3-, SO 4 = and CrO 4 = , being copper (II) and phosphate the ions that were most easily and quantitatively adsorbed. The results of equilibrium experiments showed that the Redlich-Peterson adsorption isotherm model explained the experimental results for some metal ions.The experimental kinetics followed a pseudo-second-order kinetics model for Cu(II) and Zn(II) sorption.

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Use of chitosan for chromium removal from exhausted tanning baths

Cited by 11 publications

References 0 publications

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

Disparate activation routes of developing adsorbents from waste biomass: A comparative studies

Adsorption of Pollutant Ions From Residual Aqueous Solutions Onto Nano-Structured Calcium Silicate

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