Adsorption of arsenic(V) oxyanion from aqueous solutions by using protonated chitosan flakes

Padilla-Rodríguez, Abigail; Hernández-Viezcas, José Á.; Peralta-Videa, José R.; Gardea‐Torresdey, Jorge L.; Perales-Pérez, Óscar; Román-Velázquez, F.

doi:10.1080/01496395.2015.1040123

Cited by 4 publications

(3 citation statements)

References 85 publications

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“…A protonated chitosan gel exhibited enhanced As (V) adsorption compared to chitosan powder (maximum ~88% versus ~40% at pH 3). Padilla-Rodriguez et al [ 54 ] also found that protonated chitosan flakes were more effective than chitosan powder for the removal of As (V) from aqueous solutions. Both the Ch–Rs and Ch–Pu blends in 1:2 and 1:5 ratios showed the highest As(V) removal efficiency (>90%) at a wide pH range (3 to 7) as compared to the unmodified red scoria (~90% only at pH 3) and pumice (<20%), as well as the blends at 1:10 ratio of chitosan–red scoria (>90% at pH 3 up to ~65% at pH 7) and chitosan–pumice (~85% at pH 3 up to ~19% at pH 7).…”

Section: Resultsmentioning

confidence: 99%

Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends

Asere

Mincke

Clercq

et al. 2017

IJERPH

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In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1:5 (chitosan: volcanic rocks) with maximum adsorption capacity of 0.72 mg/g and 0.71 mg/g for chitosan: red scoria (Ch–Rs) and chitosan: pumice (Ch–Pu), respectively. The experimental adsorption data fitted well a Langmuir isotherm (R2 > 0.99) and followed pseudo-second-order kinetics. The high stability of the materials and their high arsenic (V) removal efficiency (~93%) in a wide pH range (4 to 10) are useful for real field applications. Moreover, the blends could be regenerated using 0.05 M NaOH and used for several cycles without losing their original arsenic removal efficiency. The results of the study demonstrate that chitosan-volcanic rock blends should be further explored as a potential sustainable solution for removal of arsenic (V) from water.

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Section: Resultsmentioning

confidence: 99%

Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends

Asere

Mincke

Clercq

et al. 2017

IJERPH

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“…Previously, we observed that the chitosan-DES beads exhibited great efficacy in the elimination of the anionic dye Acid Blue 80 even after five successive uses when the adsorbent was subjected to acid treatment and then water-washed, maintaining the same adsorption capacity during the study, with no need to desorb the dye [9]. Protonated chitosan-based adsorbents have been scarcely tested for contaminants, as reported in few publications, most of them on metals and other inorganic contaminants [16][17][18][19][20][21] and very few ones on dyes [12,22,23]. Chitosan applications have been partly limited due to its dissolution in an acid medium.…”

Section: Introductionmentioning

confidence: 99%

Accessible Eco-Friendly Method for Wastewater Removal of the Azo Dye Reactive Black 5 by Reusable Protonated Chitosan-Deep Eutectic Solvent Beads

Martínez-Rico,

Blanco,

Domínguez

et al. 2024

Molecules

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A novel approach to enhance the utilization of low-cost and sustainable chitosan for wastewater remediation is presented in this investigation. The study centers around the modification of chitosan beads using a deep eutectic solvent composed of choline chloride and urea at a molar ratio of 1:2, followed by treatment with sulfuric acid using an impregnation accessible methodology. The effectiveness of the modified chitosan beads as an adsorbent was evaluated by studying the removal of the azo dye Reactive Black 5 (RB5) from aqueous solutions. Remarkably, the modified chitosan beads demonstrated a substantial increase in adsorption efficiency, achieving excellent removal of RB5 within the concentration range of 25–250 mg/L, ultimately leading to complete elimination. Several key parameters influencing the adsorption process were investigated, including initial RB5 concentration, adsorbent dosage, contact time, temperature, and pH. Quantitative analysis revealed that the pseudo-second-order kinetic model provided the best fit for the experimental data at lower dye concentrations, while the intraparticle diffusion model showed superior performance at higher RB5 concentration ranges (150–250 mg/L). The experimental data were successfully explained by the Langmuir isotherm model, and the maximum adsorption capacities were found to be 116.78 mg/g at 298 K and 379.90 mg/g at 318 K. Desorption studies demonstrated that approximately 41.7% of the dye could be successfully desorbed in a single cycle. Moreover, the regenerated adsorbent exhibited highly efficient RB5 removal (80.0–87.6%) for at least five consecutive uses. The outstanding adsorption properties of the modified chitosan beads can be attributed to the increased porosity, surface area, and swelling behavior resulting from the acidic treatment in combination with the DES modification. These findings establish the modified chitosan beads as a stable, versatile, and reusable eco-friendly adsorbent with high potential for industrial implementation.

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“…Also, the amino groups of chitosan can be protonated under acidic conditions (pH < 6.3) to form −NH 3 + , leading to the adsorption of anionic species such as fluoride, metal oxoanions, , and anionic dyes . Additionally, mechanical strength, thermal resistance, gas barrier property, antimicrobial property, and anion adsorption ability of the chitosan-based materials have successfully been improved upon the hybridization with clays including smectite clay minerals and layered double hydroxide. − Despite the merits of the transformation of chitin to chitosan for the fabrication of functional biopolymer-based materials, the deacetylation process often requires strong alkaline conditions and, moreover, suffers from the weight loss which causes loss of strength in the final product . Therefore, the development of a methodology to use chitin without deacetylation, in addition to the alternative method of the deacetylation of chitin, is worth investigating.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Chitin/Clay Hybrid Film by a Mechanochemical Method

Saito

Morita

Ogawa

2020

ACS Appl. Polym. Mater.

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Development of a facile and environmentally benign route to shaping chitin into macroscopic forms is one of the important and challenging issues for designing sustainable biopolymer materials. Here, we report a methodology to process chitin into a free-standing film by the mechanochemical mixing of chitin powder with an aqueous suspension of a smectite clay mineral (synthetic saponite) and subsequent casting of the suspension on a flat polytetrafluoroethylene plate. The chitin/clay hybrid film exhibits properties such as flexibility, stiffness, and water resistance. This simple and green route for processing chitin into the free-standing film is expected to be a useful way for the fabrication of biopolymer-based functional materials.

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Adsorption of arsenic(V) oxyanion from aqueous solutions by using protonated chitosan flakes

Cited by 4 publications

References 85 publications

Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends

Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends

Accessible Eco-Friendly Method for Wastewater Removal of the Azo Dye Reactive Black 5 by Reusable Protonated Chitosan-Deep Eutectic Solvent Beads

Preparation of a Chitin/Clay Hybrid Film by a Mechanochemical Method

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