Prunus mahaleb shell as a sustainable bioresource for carminic acid removal from aqueous solution: Experimental and theoretical studies

Keskin, Zehra Seba; Şenol, Zeynep Mine; Kaya, Savaş; Şimşek, Selçuk

doi:10.1016/j.molstruc.2022.134618

Cited by 16 publications

(10 citation statements)

References 44 publications

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“…7) and a reverse phenomenon is noticed. Similar trend has been observed by other workers for the adsorption of ionic dye on various materials [7,24,[39][40][41] .…”

Section: Point Zero Charge and Effect Of Initial Phsupporting

confidence: 90%

“…In fact, the larger the mass of the adsorbent used, greater the availability of more adsorption sites [27,38,39] . Inversely, the amount adsorbed per unit of adsorbent decreases and can be attributed to the unsaturation of active sites on the adsorbent surface [7] .…”

Section: Adsorbent Dosementioning

confidence: 99%

“…Those which are not visible can be transformed into toxic or carcinogenic compounds after long time exposure [1][2][3][4][5] . They also affect negatively the human life by affecting vital activities such as drinking, washing and bathing and are responsible for dysfunction in the brain and central nervous system, liver, kidney, reproductive system, and cancer [6][7][8] . The chemical structures of those dyes generally contains aromatic groups and metals which enable them to be less or not biodegradable [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

“…The primary concern worldwide has been the maintenance of adequate and good water quality [7] . It is then of great interest to find ways for effective removal of NR4 from industrial wastewaters before discharging them into environment.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Kepdieu,

Djangang,

Njimou

et al. 2023

AJPS

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Purpose: A study of the removal of dye Natural red 4 (NR4) by a low-cost silica-smectite clay labeled SSC was carried out. Methodology: Batch tests were carried on with some processing parameters namely initial dye concentration (10 - 50 mg/L), temperature (25 – 65 °C), adsorbent dose (1 – 5 g/L), initial pH (4 – 8) and contact time (0 - 120 min). Findings: The Energy of adsorption was less than 20 kJ/mol showing a physisorption process. Also, thermodynamics parameters such as enthalpy of activation ∆H* (19.0 kJ/mol), entropy of activation ∆S* (- 024 kJ/mol/K) and Gibbs free energy of activation ∆G* (90.57 - 100.17 kJ/mol) revealed that the adsorption of NR4 molecules onto SSC was endothermic and with no significant changes in the internal structure of the adsorbent. The pseudo-first order and pseudo-second order had a good correlation with experimental data with R2 = 0.99 and R2 = 0.98 respectively. Langmuir isotherm model matched well the equilibrium data with a maximum adsorption capacity Qm of 25.55 mg/g. and a correlation value of 0.98. Unique Contribution to Theory, Policy and Practice: The newly synthesized and characterized low-cost silica-smectite composite is effective in the adsorptive removal of natural red 4 dye from water wastes.

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“…7) and a reverse phenomenon is noticed. Similar trend has been observed by other workers for the adsorption of ionic dye on various materials [7,24,[39][40][41] .…”

Section: Point Zero Charge and Effect Of Initial Phsupporting

confidence: 90%

Section: Adsorbent Dosementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Kepdieu,

Djangang,

Njimou

et al. 2023

AJPS

View full text Add to dashboard Cite

show abstract

“…However, the limitations of most of these methods include the generation of toxic sludge, high operational and maintenance costs, and the intricate technique involved in the treatment 9 . Comparatively, the adsorption method is considered a better treatment process in wastewater treatment technologies due to ease of operation, convenience, and simplicity of design 10 , 11 . But it has a limitation of sludge generation (spent adsorbents after use) as other removal processes 12 .…”

Section: Introductionmentioning

confidence: 99%

Flax fiber based semicarbazide biosorbent for removal of Cr(VI) and Alizarin Red S dye from wastewater

Akl

El-Zeny

Hashem

et al. 2023

Sci Rep

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In the present study, flax fiber based semicarbazide biosorbent was prepared in two successive steps. In the first step, flax fibers were oxidized using potassium periodate (KIO4) to yield diadehyde cellulose (DAC). Dialdehyde cellulose was, then, refluxed with semicarbazide.HCl to produce the semicarbazide functionalized dialdehyde cellulose (DAC@SC). The prepared DAC@SC biosorbent was characterized using Brunauer, Emmett and Teller (BET) and N2 adsorption isotherm, point of zero charge (pHPZC), elemental analysis (C:H:N), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analyses. The DAC@SC biosorbent was applied for the removal of the hexavalent chromium (Cr(VI)) ions and the alizarin red S (ARS) anionic dye (individually and in mixture). Experimental variables such as temperature, pH, and concentrations were optimized in detail. The monolayer adsorption capacities from the Langmuir isotherm model were 97.4 mg/g and 18.84 for Cr(VI) and ARS, respectively. The adsorption kinetics of DAC@SC indicated that the adsorption process fit PSO kinetic model. The obtained negative values of ΔG and ΔH indicated that the adsorption of Cr(VI) and ARS onto DAC@SC is a spontaneous and exothermic process. The DAC@SC biocomposite was successfully applied for the removal of Cr(VI) and ARS from synthetic effluents and real wastewater samples with a recovery (R, %) more than 90%. The prepared DAC@SC was regenerated using 0.1 M K2CO3 eluent. The plausible adsorption mechanism of Cr(VI) and ARS onto the surface of DAC@SC biocomposite was elucidated.

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Efficient adsorption of Pb(II) ions using novel adsorbent polyacrylamide/coffee ground composite: isotherm, kinetic and thermodynamic studies

Keskin

2023

Polym. Bull.

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Prunus mahaleb shell as a sustainable bioresource for carminic acid removal from aqueous solution: Experimental and theoretical studies

Cited by 16 publications

References 44 publications

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Flax fiber based semicarbazide biosorbent for removal of Cr(VI) and Alizarin Red S dye from wastewater

Efficient adsorption of Pb(II) ions using novel adsorbent polyacrylamide/coffee ground composite: isotherm, kinetic and thermodynamic studies

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