Full Factorial Design Approach to Hg(II) Adsorption onto Hydrogels

Bingöl, Deniz; Saraydın, Dursun; Özbay, Dilek Şolpan

doi:10.1007/s13369-014-1484-x

Cited by 18 publications

(3 citation statements)

References 18 publications

(14 reference statements)

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“…The adsorption process was optimized by simultaneously studying the adsorption parameters of dosage, concentration, pH, and temperature using the Box–Behnken model via Design‐Expert 9.0 for the different independent parameters . Box–Behnken model helped to reduce the number of experimental replicates, thereby allowing the linear, quadratic effects, and first order interactions to be well estimated .…”

Section: Resultsmentioning

confidence: 99%

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Ngwabebhoh

Erdem

Yıldız

2016

J of Applied Polymer Sci

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A comprehensive feasibility study on adsorption of Cu(II) and a water‐soluble nitrazine yellow (NY) dye by chitosan‐montmorillonite (CS‐MMT) hydrogel as the biosorbent was investigated as a function of biosorbent dosage, initial concentration, pH, temperature, and the presence of salts. Box–Behnken methodology was applied to optimize the adsorption experiments. Maximum adsorption values were determined as 132.74 mg/g and 144.41 mg/g at pH = 5.0, for Cu(II) and NY dye, respectively. Equilibrium isotherms of Langmuir and Freundlich were analyzed by the non‐linear regression model. The equilibrium data were well described by Freundlich model and the adsorption process well fitted pseudo‐second order kinetics. The enthalpy change of adsorption (ΔH°) were calculated as −3.78 kJ/mol and −5.75 kJ/mol for Cu(II) and NY dye, respectively, indicating that the adsorption processes were exothermic. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43664.

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Section: Resultsmentioning

confidence: 99%

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Ngwabebhoh

Erdem

Yıldız

2016

J of Applied Polymer Sci

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“…The Pareto chart has two lines, namely Bonferroni and t-Value limit lines. It is important to point out that the factors with t-Values between Bonferroni and t-Value limit lines are likely to be significant (Shahryari, Goharrizi, and Azadi 2010;Bingöl, Saraydin, and Özbay 2015). From the Pareto chart, it can be deduced that the factor b (time of heating activation) is the main important factor for the fabrication of DSAC with high surface area and adsorption ability.…”

Section: Optimization Of the Dsac Preparation Conditionsmentioning

confidence: 99%

Heat Carbonization and ZnCl2 Functionalization of Date Stone as an Adsorbent: Optimization of Material Fabrication Parameters and Adsorption Studies

Abderrahim

Boumnijel

Amor

et al. 2021

Preprint

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The scientific community gave a lot attention to prepare adsorbents from different natural agriculture-based materials to be used alternative to commercial activated carbon. However, less studies on the optimization of fabrication parameters to obtain activated carbon with highly surface area and adsorption capacity. Herein, we report the synthesis conditions optimization of adsorbent based on date stone and modified with ZnCl2. To obtain a highly adsorption ability of the materials, three systematic parameters were evaluated such as the activation temperature, activation time and the functionalization ratio by ZnCl2. The optimization study showed that the best factors to fabricate an adsorbent from date stone are 700°C, 120 min and 2.0 (g/g), wherein, the specific surface area was found to be 1036 m2/g. While, the iodine and phenol numbers were 928.5 mg/g and 2.1 mmol/g, respectively. To further understand the effect of synthesis parameters, the raw and the as-synthesized activated carbon were characterized via Fourier transmission infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). Batch sorption tests to remove MB from water showed a maximum adsorption capacity of 384.6 mg/g using the prepared activated carbon at pH 6 and room temperature (25±2 °C). It was found also that the kinetic adsorption data obeyed the pseudo-second order and, both external diffusion and intra-particle diffusion control the adsorption. Based on the obtained results, the optimization of synthesis conditions through experimental and mobilization studies may help the transfer of technology in terms of agriculture-based materials valorisation towards the environmental remediation.

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“…Pareto chart shows graphically the absolute values of the effects of factors and interactions represented by horizontal bars. The vertical line in the Pareto chart symbolizes the minimum statistically significant effect beyond which every effect is regarded significant[31,36].…”

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confidence: 99%

Impact of pulsed ultrasound on bacteria reduction of natural waters

Al-Juboori

Aravinthan

Yusaf

2015

Ultrasonics Sonochemistry

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There is a limited work on the use of pulsed ultrasound for water disinfection particularly the case of natural water. Hence, pulsed ultrasound disinfection of natural water was thoroughly investigated in this study along with continuous ultrasound as a standard for comparison. Total coliform measurements were applied to evaluate treatment efficiency. Factorial design of 2(3) for the tested experimental factors such as power, treatment time and operational mode was applied. Two levels of power with 40% and 70% amplitudes, treatment time of 5 and 15 min and operational modes of continuous and pulsed with On to Off ratio (R) of 0.1:0.6 s were investigated. Results showed that increasing power and treatment time or both increases total coliform reduction, whereas switching from continuous to pulsed mode in combination with power and treatment time has negative effect on total coliform reduction. A regression model for predicting total coliform reduction under different operating conditions was developed and validated. Energy and cost analyses applying electrical and calorimetric powers were conducted to serve as selection guidelines for the choosing optimum parameters of ultrasound disinfection. The outcome of these analyses indicated that low power level, short treatment time, and high R ratios are the most effective operating parameters.

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Full Factorial Design Approach to Hg(II) Adsorption onto Hydrogels

Cited by 18 publications

References 18 publications

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Heat Carbonization and ZnCl2 Functionalization of Date Stone as an Adsorbent: Optimization of Material Fabrication Parameters and Adsorption Studies

Impact of pulsed ultrasound on bacteria reduction of natural waters

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