Efficient removal of dyes using carboxymethyl cellulose/alginate/polyvinyl alcohol/rice husk composite: Adsorption/desorption, kinetics and recycling studies

Bhatti, Haq Nawaz; Safa, Yusra; Yakout, Sobhy M.; Shair, Omar H.M.; Iqbal, Munawar; Nazir, Arif

doi:10.1016/j.ijbiomac.2020.02.093

Cited by 258 publications

(83 citation statements)

References 62 publications

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“…(13)). High β value indicates a lower driving force [27]. According to Table 3, when CV concentration increases the Elovich constant (β) decreases, and as a result, the adsorption constant (α) increases.…”

Section: Kinetic Studiesmentioning

confidence: 97%

“…Various kinetics are used to examine the removal of CV by MRB at two different concentrations (500 and 750 mg L -1 ). Residual root-mean-square error (RMSE), the result of kinetic parameters, the linear form of these kinetics, chi-square test (χ 2 ), and the coefficients of determination (R 2 ) are shown in Table 3 [27,51]. According to χ 2 , R 2 , and RMSE, liquid film diffusion and pseudo-first-order models were not sucessful in fitting experimental data, while the Elovich model showed a good fit for it.…”

Section: Kinetic Studiesmentioning

confidence: 99%

“…But, choosing adsorbent materials can escalate the cost. The by-products or wastes of agricultural activities such as banana peels [23], walnut wood [24], orange peels [25], sugarcane bagasse [26], rice husk [27], peanut hull [28,29], Mango stone [30], Musa paradisiaca peels [31] and sweet potato peels [32] have been studied by researchers. However, adsorbents with high efficiency, availability, and low price are still needed.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of crystal violet dye by agricultural rice bran waste: Isotherms, kinetics, modeling and influencing factors

Rezazadeh

Baghdadi

Mehrdadi

et al. 2020

Environmental Engineering Research

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In this study, the potential of modified rice bran (MRB) was investigated for the elimination of crystal violet (CV) from plotted effluent. In this regard, rice bran (RB) was modified by chlorosulfonic acid. The results of FTIR, EDX, and SEM analysis showed structural change, an increase in the amount of sulfur, and the formation of a new band (998 and 1,225 cm-1) in MRB, respectively. The impact of different variables such as contact time, MRB dosage, pH, CV concentration, and ions content on removal efficiency was studied by using batch experiments. In addition, response surface methodology was employed to optimize the experiments. The maximum removal efficiency of 97.4% was obtained at the adsorbent dosage of 2 g L-1 , initial CV concentration of 100 mg L-1 , and contact time of 42.75 min. The highest adsorption capacity of 603 mg g-1 was acquired by the Langmuir model. The best description of kinetic data was achieved by the Elovich model. The thermodynamic study of the adsorption indicated an endothermic and spontaneous reaction. MRB could be regenerated by HCl 0.5 mol L-1 and removal efficiency was declined 10 percent after 5 adsorption/desorption cycles. It was concluded that MRB is an operational adsorbent to remove CV from effluents.

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Section: Kinetic Studiesmentioning

confidence: 97%

Section: Kinetic Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of crystal violet dye by agricultural rice bran waste: Isotherms, kinetics, modeling and influencing factors

Rezazadeh

Baghdadi

Mehrdadi

et al. 2020

Environmental Engineering Research

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“…Composites of nZVI have been extensively synthesized to stabilize the nZVI particles in the adsorption of residual pollutants from aqueous solutions. In addition to the increased number of active inherent surface sites, the specific surface area, and reducing the reaction time (Bhatti, Safa, et al, 2020;Li et al, 2006;Mahmood et al, 2013;Pasinszki & Krebsz, 2020;Sana, Haq Nawaz, Khalid, Jan, & Munawar, 2020;Tam et al, 2020;Theron et al, 2008;Toli, Varouxaki, Mystrioti, Xenidis, & Papassiopi, 2018).…”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Sulaiman

Al-Jabari

2021

Arab Journal of Basic and Applied Sciences

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Nano zero-valent iron-bentonite (B-nZVI) is an excellent composite for treating recalcitrant organic pollutants. In this study, B-nZVI was prepared via NaBH 4 reduction method and characterized using different instruments including X-ray diffractometer (XRD), Fourier-transform infrared spectrometry (FTIR), Field emission scanning electron microscope (SEM), Transmission electron microscope (TEM), and UV-Vis spectroscopy. Also, the efficiency of B-nZVI as an adsorbent to remove diclofenac sodium (DCF) from aqueous solution was investigated, and compared with activated carbon (AC) under different experimental conditions such as pH, adsorbent dose, DCF initial concentration, temperature, and contact time. The B-nZVI has successfully removed a high percentage of DCF from aqueous solution ($80%) within 50 min, 25 C, and pH ¼ 3. The maximum adsorption capacity of B-nZVI at equilibrium was 140.8 mg g À1 compared to 107.5 mg g À1 via AC. Furthermore, it was found that the DCF adsorption best fitted the Langmuir isotherm and pseudo-second-order kinetic models (R 2 > 0.987). Also, the thermodynamic parameters of adsorption were estimated and the average values showed that the adsorption of DCF via B-nZVI is an endothermic processðDH ¼ 29:865:2kJ mol À1 Þ, and spontaneous with a positive value of entropy ðDS ¼ 175:4 6 11:3J mol À1 K À1 Þ at 25 C. The point of zero charge (PZC) was determined (7.0 ± 0.1) using a salt addition method. Finally, column filtration was demonstrated using a mixture of sand and B-nZVI composite, which showed a significant advantage in comparison with that activated carbon/sand mixture.

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“…Also, removal of dyes and refreshing of the adsorbent is needed to make the adsorption as more affordable process. Desorption or regeneration can be performed using some techniques including thermal, biological, chemical, and electrochemical 13 . Due to the problems released in these regeneration processes, some new methods were consulted in recent researches.…”

Section: Introductionmentioning

confidence: 99%

Impact of operating conditions for the continuous‐flow removal of dye effluents in a fixed‐bed reactor using light expanded clay aggregate as a green adsorbent with ultrasound‐assisted desorption

Moradi

Rahimpour

Salehi

et al. 2020

Asia-Pacific J Chem Eng

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The adsorption of Reactive Red 33 dye from aqueous solution onto light expanded clay aggregate (LECA) in a batch mode, fixed-bed reactor has been investigated. The adsorption studies were determined as a function of dye initial concentration, pH, flow rate, temperature, and adsorbent size using response surface methodology. The maximum amount of dye removal (85.11%) was obtained in the optimized conditions (pH = 2, C 0 = 20 mg/L, and T = 20 C; flow rate: 40 L/min and smaller size of LECA granules). Also, highfrequency ultrasound waves have been applied for desorption process which improved the desorption efficiency by 81%. Equilibrium data are fitted well with Langmuir isotherm model and obeyed the Weber-Morris and external diffusion kinetic models. The exothermic nature and negative amount of Gibbs free energy change confirmed the spontaneous nature of this process. The maximum adsorption capacity, q max , as estimated by Langmuir isotherm model was 1.363 mg/g.

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Efficient removal of dyes using carboxymethyl cellulose/alginate/polyvinyl alcohol/rice husk composite: Adsorption/desorption, kinetics and recycling studies

Cited by 258 publications

References 62 publications

Adsorption of crystal violet dye by agricultural rice bran waste: Isotherms, kinetics, modeling and influencing factors

Adsorption of crystal violet dye by agricultural rice bran waste: Isotherms, kinetics, modeling and influencing factors

Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Impact of operating conditions for the continuous‐flow removal of dye effluents in a fixed‐bed reactor using light expanded clay aggregate as a green adsorbent with ultrasound‐assisted desorption

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