Modeling of chromium (VI) removal from aqueous solution using modified green-Graphene: RSM-CCD approach, optimization, isotherm, and kinetic studies

Javid, Allahbakhsh; Roudbari, Aliakbar; Yousefi, Nader; Fard, Mohammad Alizadeh; Barkdoll, Brian D.; Talebi, Seyedeh Solmaz; Nazemi, Saeed; Ghanbarian, Marjan; Ghadiri, Seid Kamal

doi:10.1007/s40201-020-00479-8

Cited by 19 publications

(5 citation statements)

References 54 publications

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“…The second-order polynomial regression model for the variables is presented according to Eq. (8) (Javid et al 2020):…”

Section: Experimental Design and Modelingmentioning

confidence: 99%

“…The response surface methodology in the form of several classes, such as Box-Behnken design, central composite design, hybrid design, and three-level factorial design, is applicable. Among these methods, the central composite design (CCD) is the most used (Javid et al 2020). In previous studies, methods such as soil washing using surfactants, biosurfactant, and advanced oxidation processes were taken for soil remediation.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Pourfadakari

Jorfi

Roudbari

et al. 2020

Environ Sci Pollut Res

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The objective of this work was to investigate the modification of soil contaminated with phenanthrene (PHE) by electro-kinetic remediation (EKR) process using response surface methodology (RSM). The soil sample was obtained from the subgrades (0-30 cm) of an area close to Shahroud City, Northeast of Iran. The effect of variables such as initial pH, voltage, electrolyte concentration, and reaction time on PHE removal was studied. Based on the results obtained from the central composite design (CCD) experiment, the highest and lowest amount of PHE removal was 97 and 20%, respectively. In this study, the variables A, B, C, AB, AC, and C 2 with a p value < 0.05 were significant model terms and the parameter of the lack of fit was not significant (p value = 0.0745). Findings indicated that the "predicted R-squared" of 0.9670 was in reasonable agreement with the "adj R-squared" of 0.9857 and the plot of residual followed a normal distribution and approximately linear. Also, the kinetic rates of the removal PHE by the EKR process best fitted with a first-order kinetic model (R 2 : 0.926). Results of the investigation of the effective variables showed that in values of pH 3, time of 168 h, voltage of 3 V, and electrolyte concentration of 4 mg/L, the removal efficiency of PHE reached 96.6%.

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“…The second-order polynomial regression model for the variables is presented according to Eq. (8) (Javid et al 2020):…”

Section: Experimental Design and Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Pourfadakari

Jorfi

Roudbari

et al. 2020

Environ Sci Pollut Res

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“…Graphene oxide (GO) is a scalable derivate of graphene that is highly hydrophilic and rich indifferent functional groups such as carboxyl, hydroxyl, and epoxy. Reduced graphene oxide (RGO)is also a type of graphene that the presence of abundant hydroxyl functional groups has caused the hydrophobicity significantly 27 , 28 . The presence of functional groups and the adaptability of being composite, functionalized, and decorate, surged interest toward graphene family for treatment purposes such as adsorption, catalysis, membrane separation, ion exchange, dialysis, etc.…”

Section: Introductionmentioning

confidence: 99%

Comparative removal of hazardous cationic dyes by MOF-5 and modified graphene oxide

Mohammadi

Moghanlo

Kazemi

et al. 2022

Sci Rep

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Among cationic dyes, malachite green (MG) is commonly used for dying purposes and also as an inhibitor in aquaculture, food, health, and chemical industries due to its cytotoxic effects. Therefore, MG removal is essential to keep the ecosystem and human health safety. Adsorption is a viable and versatile option and exploring efficient adsorbents have high priority. Herein, MOF-5 and aminated corn Stover reduced graphene oxide (ACS-RGO) of typical adsorbents of metal–organic-frameworks (MOFs) and carbon-based classes were studied for MG removal. MOF-5 and ACS-RGO had a specific surface area and total pore volume of 507.4 and 389.0 m2/g, and 0.271 cm3/g and 0.273 cm3/g, respectively. ACS-RGO was superior for MG adsorption and the kinetic rate coefficient for ACS-RGO was ~ 7.2 times compared to MOF-5. For ACS-RGO, MG removal remained high (> 94%) in a wide range of pH. However, dye removal was pH-dependent for MOF-5 and increased from ~ 32% to ~ 67% by increasing pH from 4 to 12. Increasing dye concentration from 25 mg/L to 100 mg/L decreased adsorption by MOF-5 and ACS-RGO for ~ 30% and 7%, respectively. Dye removal was evident in a few tens of seconds after adding ACS-RGO at doses above 0.5 g/L. A significant loss of 46% in adsorption was observed by decreasing MOF-5 mass from 1 to 0.1 g/L. ACS-RGO removed MG in multilayer with an exceptional adsorption capacity of 1088.27 mg/g. In conclusion, ACS-RGO, and MOF-5 showed promising kinetic rates and adsorption capacities toward MG.

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“…It is anticipated that by the year 2050, two-thirds of the world's population will live in areas with low access to freshwater resources, and by 2100, this figure may touch 11.2 billion (Biswas & Tortajada, 2019;Ridzuan, 2021). Currently, many countries in the world are grappling with problems of water stress, water scarcity and poor drinking water quality (Biswas & Tortajada, 2019;Hourieh Fallah et al, 2020;Javid et al, 2020a). Accordingly, with an improvement in the general health conditions of the people on account of rapid technological advancements in the field of medicine, the need for an evaluation of the quality of various available drinking water resources, including well water, tap water, and even bottled water, may be necessary, especially in developing countries (van der Linden, 2015;Hourieh Fallah et al, 2020;Javid et al, 2020b;Ghanbarian et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of various parameters of drinking water quality in Shahroud city, Iran: tap water, well water and bottled water

et al. 2022

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The physical, chemical and microbial quality of bottled water, tap water and water supplied from wells in the city of Shahroud was compared. The results of the analysis showed that the measured parameters, except in minor cases, were of national and international standards. There was no significant difference between the quality of bottled water and tap water, as well as bottled water and water available in water supply resources in the city of Shahroud. Regardless of the area in which the study was conducted, it was found that there was no need for developing other types of water treatment systems such as bottled water and domestic water treatment systems. In many cases, since bottled water is exposed to intense sunlight during the transport process, there could be a leakage of plastic monomers from the bottle wall into the water in hot or cold conditions, which can endanger consumer health. Tap water supplied from the water supply resources in the city of Shahroud was found to be completely safe and posed no threat to consumer health.

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Modeling of chromium (VI) removal from aqueous solution using modified green-Graphene: RSM-CCD approach, optimization, isotherm, and kinetic studies

Cited by 19 publications

References 54 publications

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Comparative removal of hazardous cationic dyes by MOF-5 and modified graphene oxide

A comparative study of various parameters of drinking water quality in Shahroud city, Iran: tap water, well water and bottled water

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