Effect of the form and deacetylation degree of chitosan sorbents on sorption effectiveness of Reactive Black 5 from aqueous solutions

Jóźwiak, Tomasz; Filipkowska, Urszula; Szymczyk, Paula; Zyśk, Michał

doi:10.1016/j.ijbiomac.2016.11.007

Cited by 29 publications

(14 citation statements)

References 19 publications

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“…In a series of works, Jóźwiak et al (2013Jóźwiak et al ( , 2015Jóźwiak et al ( , 2017a) also focused on the structure-property relationships of chitosan hydrogels. Their works compared properties of hydrogel chitosan biosorbents cross-linked with nine agents (Jóźwiak et al 2017b), including five ionic ones (sodium citrate, sodium tripolyphosphate, sodium edetate, sulfosuccinic acid, and oxalic acid) and four covalent ones (glutaraldehyde, epichlorohydrin, trimethylpropane triglycidyl ether, and ethylene glycol diglycidyl ether).…”

Section: A Recent Review Of the Literature On Dye Removal By Chitosanmentioning

confidence: 99%

“…The effect of cross-linking process conditions (pH, temperature) and dose of the cross-linking agent on material stability during biosorption and on the effectiveness of Reactive Black 5 dye biosorption were examined. The influence of chemical nature of chitosan, e.g., degree of deacetylation, was also studied (Jóźwiak et al 2017a). The optimal parameters of cross-linking ensuring biosorbent stability in acidic solutions and high biosorption capability were established for each cross-linking agent tested.…”

Section: A Recent Review Of the Literature On Dye Removal By Chitosanmentioning

confidence: 99%

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Dye removal by biosorption using cross-linked chitosan-based hydrogels

et al. 2019

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Synthetic dyes are an important class of recalcitrant organic compounds that are often found in the environment as a result of their wide industrial use. There are estimated to be more than 100,000 commercially available dyes. These substances are common contaminants, and many of them are known to be toxic or carcinogenic. Colored effluents from the industry is perceived by the public as an indication of the presence of a dangerous pollution. Even at very low concentrations, dyes are highly visible-an esthetic pollution-and modify the aquatic life and food chain, as a chemical contamination. Dye contamination of water is a major problem worldwide, and the treatment of wastewaters before their discharge into the environment has become a priority. Dyes are difficult to treat due to their complex aromatic structure and synthetic origin. In general, a combination of different physical, chemical and biological processes is often used to obtain the targeted water quality. Nonetheless, there is a need to develop new removal strategies and decolorization methods that are more effective, acceptable for industrial use and ecofriendly. Currently, there is increasing interest in the application of biological materials as effective adsorbents for dye removal. Among all the materials proposed, cross-linked chitosan-based hydrogels are the most popular biosorbents. These polymeric matrices are the object of numerous fundamental studies. In this review, after a brief description of the use of chitosan in wastewater treatment and the basic principles of chitosan-based hydrogels and biosorption, we focus on some of the work published over the past 5 years. Overall, these polymeric materials have demonstrated outstanding removal capabilities for some dyes. They might be promising biosorbents for environmental purposes.

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Section: A Recent Review Of the Literature On Dye Removal By Chitosanmentioning

confidence: 99%

Section: A Recent Review Of the Literature On Dye Removal By Chitosanmentioning

confidence: 99%

Dye removal by biosorption using cross-linked chitosan-based hydrogels

et al. 2019

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“…Very good capability for anionic dyes sorption is exhibited by chitosan which in this case outclasses even activated carbon. Chitosan sorption capacity against selected anionic dyes may exceed 1000 mg/g (Jóźwiak et al , 2017b. The high efficiency of chitosan as a sorbent results from the presence of secondary amine groups in its structure, which are responsible for its base character.…”

Section: Introductionmentioning

confidence: 99%

Use of aminated hulls of sunflower seeds for the removal of anionic dyes from aqueous solutions

Jóźwiak

Filipkowska

Brym

et al. 2019

Int. J. Environ. Sci. Technol.

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In this study, we analyzed the effectiveness of sorption of dyes popular in the textile industry (Reactive Black 5, Reactive Yellow 84, Acid Yellow 23, and Acid Red 18) on aminated and non-aminated seed hulls of common sunflower (Helianthus annuus L.). The scope of the study included: determination of the effect of pH on dye sorption effectiveness, sorption kinetics analyses (sorption equilibrium time, pseudo-first-order/pseudo-second-order model, intramolecular diffusion model), and determination of the maximum sorption capacity against dyes (Langmuir/Freundlich isotherm). The sorbent was subjected to the FTIR analysis. The sorption capacity of the aminated sunflower seed hulls against reactive dyes RB5 and RY84 accounted for 51.02 mg/g and 63.27 mg/g, respectively, and was higher by 1665% (17.6 times higher) and 1425% (15.3 times higher) compared to that of non-modified hulls. In the case of acidic dyes, Acid Yellow 23 and Acid Red 18, the sorption capacity of the aminated sunflower seed hulls reached 44.78 mg/g and 42.19 mg/g, respectively, and was higher by 1881% (19.8 times higher) and 2284% (23.8 times higher), respectively, compared to the non-modified hulls.

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“…The high effectiveness of nutrient sorption on chitosan beads is also attributed to their hydrogel form which facilitates nutrient access to sorption sites located in deeper layers of the sorbent. The sorption effectiveness of chitosan in the form of hydrogel may be higher by even 224% than that of the same chitosan in the form of flakes (Jóźwiak et al 2017c ). Sorption effectiveness of nitrates and phosphates onto chitosan sorbents may also be increased through chitosan cross-linking with, e.g., epichlorohydrin.…”

Section: Introductionmentioning

confidence: 99%

Hydrogel chitosan sorbent application for nutrient removal from soilless plant cultivation wastewater

Jóźwiak

Mielcarek

Janczukowicz

et al. 2018

Environ Sci Pollut Res

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In this study, we determined the effectiveness of removal of nutrients (nitrates and orthophosphates) from greenhouse wastewaters (GW) using non-cross-linked chitosan (CHs) and chitosan cross-linked with epichlorohydrin (CHs-ECH) in the form of hydrogel beads. GW used in the study had the following parameters: N-NO3 621.1 mg/L, P-PO4 60.8 mg/L, SO42− 605.0 mg/L, Cl− 0.9 mg/L, Ca2+ 545.0 mg/L, Mg2+ 178.0 mg/L, K+ 482.0 mg/L, hardness 113° dH, and pH 6.2. The scope of the study included determination of the effect of pH on wastewater composition and effectiveness of nutrient sorption, analyses of nutrient sorption kinetics, and analyses of the effect of sorbent dose on percentage removal of nutrients from GW. CHs-ECH was able to sorb 79.4% of P-PO4 and 76.7% of N-NO3 from GW, whereas CHs to remove 92.8% of P-PO4 and 53.2% of N-NO3.Electronic supplementary materialThe online version of this article (10.1007/s11356-018-2078-z) contains supplementary material, which is available to authorized users.

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Effect of the form and deacetylation degree of chitosan sorbents on sorption effectiveness of Reactive Black 5 from aqueous solutions

Cited by 29 publications

References 19 publications

Dye removal by biosorption using cross-linked chitosan-based hydrogels

Dye removal by biosorption using cross-linked chitosan-based hydrogels

Use of aminated hulls of sunflower seeds for the removal of anionic dyes from aqueous solutions

Hydrogel chitosan sorbent application for nutrient removal from soilless plant cultivation wastewater

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