Cellulose/cysteine based thiol-ene UV cured adsorbent: removal of silver (I) ions from aqueous solution

Çi̇ği̇l, Asli Beyler; Urucu, Oya Aydın; Bi̇rtane, Hati̇ce; Kahraman, Memet Vezi̇r

doi:10.1007/s10570-021-03932-5

Cited by 18 publications

(2 citation statements)

References 37 publications

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“…The Freundlich isotherm model given in Eq. 6 assumes sorption on a heterogeneous surface, with a high number of various types of available sites with a different free energy of sorption, not limited by a monolayer formation (Beyler Çiğil et al 2021).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Mladenovic

Petkovska

Dimova

et al. 2022

Preprint

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Rice husk, modified with effluent from the alkaline scouring of cotton, employing an inexpensive treatment based on the circular economy concept, is used as a bio-sorbent to study the equilibrium and kinetic on cold brand BEZAKTIV BLAU V3-R (BBV3-R) and medium brand BEZAKTIV BLAU S-2R (BBS2-R) reactive dyes. 10, 20, and 40 g L-1 rice husk is used to follow adsorption of 0.1, 0.2, 0.3, 0.4, and 0.5 g L-1 BBV3-R and BBS2-R in a presence of 60 g L-1 NaCl at pH 10, at the temperature of 25oC and 40oC, respectively. Langmuir, Freundlich, and Dubinin-Radushkevic's adsorption models were employed, with the Freundlich model proving the best fit for our data. Activation energy calculated with the Dubinin-Radushkevic model (lower than 8 KJ mol-1) confirms the physical sorption of these reactive dyes onto the husk. The obtained maximum experimental absorption capacities of 122.2 mg g-1 for BBV3-R and 171.7 mg g-1 for BBS2-R using 10 g L-1 ERH are the best found in the literature. Pseudo-second-order model determines the adsorption kinetics, while the liquid film diffusion model is rate-determining. This paper demonstrates the applicability of the circular economy concept to obtain an efficient adsorbent for purifying colored effluent enriched with reactive dyes, which are one of the most challenging dyes in the textile industry from the aspect of their effluent purifying.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Mladenovic

Petkovska

Dimova

et al. 2022

Preprint

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show abstract

“…Green technologies derived via microbial metabolism have effectively been used in the treatment of heavy metals and wastewater [30][31][32]. Sulfur-based sorbents (thions, thiols or heterocyclic compounds) show a high affinity toward silver ions [22,23,[33][34][35]; due to the sulfur reagent compounds, which shows a high selectivity for silver [36][37][38][39][40][41], this is based on hard and soft acids and bases (HSAB) theory [42]. Selectivity has been shown by sulfur-containing polymers, i.e., dithiocarbamate [43], mercaptobenzimidazole [35] and thiol derivatives [44,45].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfur-Grafted Chitosan Biopolymers and Improvement to Their Sorption of Silver Ions from Different Aqueous Solutions

Hamza,

El-Habibi,

Abdel-Rahman

et al. 2024

Sustainability

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A functionalized chitosan thiourea composite (CH-TU) was successfully synthesized using formaldehyde as a crosslinking agent for enhancing silver recovery from different aqueous solutions. Comparison sorption studies with a non-functionalized composite (CH-F) as a reference material were conducted. Grafting led to an improvement in the sorption performances, i.e., 0.763 mmol Ag g−1 for CH-F vs. 2.125 mmol Ag g−1 for CH-TU. The pseudo-first-order rate equation (PFORE) was fitted to the sorption kinetics at saturation times of 40 and 30 min for CH-F and CH-TU, respectively, while the sorption isotherms were fitted with Langmuir and Sips equations for both sorbents. Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), nitrogen sorption–desorption isotherms (BET-surface area), elemental analysis, thermogravimetric analysis (TGA) and pH of the zero charge (pHpzc) were used to characterize and investigate the sorption mechanism. Sorption was performed three times to check the reproducibility, while the sorption performances were stable over 20 cycles, with a limited decrease in performance (5 and 3% for CH-F and CH-TU, respectively). Nitric acid solution (0.3 M) was efficient for desorbing the adsorbed metal ions. The grafted sorbent with thiourea is considered as a promising tool for recovering Ag(I) from acidic waste leachate derived from waste spent films.

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Adsorption performance of silver ion on acrylic grafted carboxymethyl chitosan/dialdehyde starch

Ouyang,

Zhan,

Luo

et al. 2024

Adsorption

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Cellulose/cysteine based thiol-ene UV cured adsorbent: removal of silver (I) ions from aqueous solution

Cited by 18 publications

References 37 publications

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Synthesis of Sulfur-Grafted Chitosan Biopolymers and Improvement to Their Sorption of Silver Ions from Different Aqueous Solutions

Adsorption performance of silver ion on acrylic grafted carboxymethyl chitosan/dialdehyde starch

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