Effective adsorptive removal of reactive dyes by magnetic chitosan nanoparticles: Kinetic, isothermal studies and response surface methodology

Jaafari, Jalil; Barzanouni, H.; Mazloomi, Sajad; Farahani, Noshin Amir Abadi; Sharafi, Kiomars; Soleimani, Parasto; Haghighat, Gholam Ali

doi:10.1016/j.ijbiomac.2020.07.042

Cited by 120 publications

(37 citation statements)

References 48 publications

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“…This enhanced surface area property will lead to efficient diffusion of the RR120 dye molecules into inter pores and/or adsorption active sites. Subsequently, adding more doses of the adsorbent (CHT-ECH/CFA50) to the dye solution will offer more active adsorption sites for capturing anionic dye molecules such as RR120 [39]. Besides that, the interaction between dose (B) and temperature (D) was observed to be statistically significance with p-value of 0.0460.…”

Section: Three-dimensional (3-d) Surface Plotsmentioning

confidence: 93%

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

Mohammed

Malek

Jawad

et al. 2021

Preprint

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The growing concern regarding the environmental protection has encouraged researchers to focus their efforts on developing better and more effective possibilities of removing pollutants. In this research, a biocomposite adsorbent of covalently crosslinked chitosan-epichlorohydrin/coal fly ash (CHT-ECH/CFA) was synthesized and applied for reactive red 120 dye (RR120) removal. The CHT-ECH/CFA was characterized by BET, pH potentiometric, pHpzc, XRD, FTIR and SEM-EDX. Box–Behnken Design (BBD) was employed to assess the effects of the adsorption key parameters such as CFA loading into CTH-ECH matrix, adsorbent dose, solution pH, working temperature and contact time. The optimized CFA loading, adsorbent dose, temperature, time, and pH were observed to be 50 %, 0.07 g, 45 °C, 60 min, and pH 4 respectively. From BBD, the highest removal of RR120 removal at optimum conditions was found to be 90.2%. The results showed that adsorption performance can be modelled perfectly by both Langmuir and Freundlich isotherm models with maximum adsorption capacity of 237.7 mg/g at 45 °C. Moreover, the adsorption kinetics were well fitted to the pseudo-second order model. Based on the findings from the experiments conducted, the hybrid biocomposite adsorbent offers adequate potential for the treatment of anionic dye-polluted water.

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Section: Three-dimensional (3-d) Surface Plotsmentioning

confidence: 93%

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

Mohammed

Malek

Jawad

et al. 2021

Preprint

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“…Five independent parameters for optimization were contact time (A), dye concentration (B), agitation speed (C), pH (D), and adsorbent dosage (E). The main processes involved in the optimization of multiple variables included statistically designing the experiment, estimating the coefficient, analyzing the response, and checking the suitability of the model (Box & Behnken 1960;Jaafari et al 2020).…”

Section: Experimental Designmentioning

confidence: 99%

Removal of Disperse Orange and Disperse Blue dyes present in textile mill effluent using zeolite synthesized from cenospheres

Markandeya

Shukla²,

Srivastav

2021

Water Science and Technology

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In the present research, an efficient, eco-friendly method of utilization of coal fly ash in the form of zeolite, to treat wastewater containing dyes has been studied. Response surface methodology involving Box-Behnken design was applied for a batch process to evaluate the effect of process parameters like contact time, dye concentration, agitation speed, pH and adsorbent dosage onto zeolite. Disperse Orange 25 (DO) dye showed maximum 96% removal under optimal conditions of contact time (119 min), dye concentration (38.00 mg/L), agitation speed (158 rpm), pH (6.10) and adsorbent dosage (0.67 g/L), whereas 95.23% of Disperse Blue 79:1 (DB) dye removal was observed at adsorbent dose (1.05 g/L), dye concentration (26.72 mg/L), agitation speed (145 rpm), pH (5.68) and contact time (122 min). Study concluded that cenospheres derivatized zeolite adsorbent is efficient, eco-friendly and economical along with high potential for removal of DO and DB dyes from the aqueous solutions.

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“…All the variables were mentioned in the equation without considering their respective statistical significance. Response parameter Y 1 showed positive correlation with all the process parameters which indicated a synergistic association [32]. Further, with an objective of assessing the reliability of the model, the results generated using this model were compared with the experimental values.…”

Section: Model Equations and Regression Analysismentioning

confidence: 99%

Assessing the Applicability of Photocatalytic-Concrete Blocks in Reducing the Concentration of Ambient NO2 of Chandigarh, India, Using Box–Behnken Response Surface Design Technique: A Holistic Sustainable Development Approach

Singla

Thind

et al. 2021

Journal of Chemistry

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Anthropogenic emissions, such as industrial, vehicular, biomass burning, and coal combustion, play a significant role in degrading the atmospheric conditions of India. Therefore, in the present study, applicability of the photocatalytic-concrete blocks was estimated in improving the ambient environment of Chandigarh, India. The photocatalytic-concrete blocks were prepared by mixing the TiO2 particles with cement. All the experiments, designed in accordance with the Box–Behnken approach, in combination with response surface methodology, were performed in a batch reactor. Further, the process parameters, namely, concentration of TiO2 (1 to 5 g), UV-A irradiance (1 to 5 mW/cm2), and relative humidity (RH) (10 to 70%), were optimized to achieve maximum degradation of NO2. Outcomes of batch experiments depicted that the maximum degradation of NO2, that is, 68.32%, was attained at 3.35 g of TiO2, 5 mW/cm2 of UV-A irradiance, and 64.60% RH. The findings of batch experiment were further theoretically applied to degrade the ambient NO2 concentration of Chandigarh, India. It was estimated that using the photocatalytic concrete for construction of Chandigarh’s pavements may reduce the ambient NO2 concentration of Chandigarh, India, to an average of 5.80 μg/m3. Afterwards, reusability of photocatalytic-concrete blocks was also assessed, and it was made evident that after five cycles, their efficiency was reduced by only 7.15%. Subsequently, it was revealed that hydrogen peroxide-based treatment of photocatalytic-concrete blocks could completely regenerate its treatment efficiency. Therefore, it is expected that the findings of this study may prove beneficial in urban planning, as it may assist scientific auditory in identifying the applicability of TiO2-based photocatalysis in mitigating the impacts of vehicular emissions.

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Effective adsorptive removal of reactive dyes by magnetic chitosan nanoparticles: Kinetic, isothermal studies and response surface methodology

Cited by 120 publications

References 48 publications

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

Removal of Disperse Orange and Disperse Blue dyes present in textile mill effluent using zeolite synthesized from cenospheres

Assessing the Applicability of Photocatalytic-Concrete Blocks in Reducing the Concentration of Ambient NO2 of Chandigarh, India, Using Box–Behnken Response Surface Design Technique: A Holistic Sustainable Development Approach

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