Optimization and modeling of aqueous Cr(VI) adsorption onto activated carbon prepared from sugar beet bagasse agricultural waste by application of response surface methodology

Ghorbani, Farshid; Kamari, Soran; Zamani, Sonouran; Akbari, Sajedeh; Salehi, Mousa

doi:10.1016/j.surfin.2020.100444

Cited by 82 publications

(25 citation statements)

References 44 publications

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“…Many researchers have used natural materials such as carbon 15 , silica 16 , activated carbon, zeolite 17 , 18 in the adsorption process. In some studies, eggshells 19 , olive mill waste 20 , peanuts, pistachio shells 21 , sugar beet bagasse 22 and sunflowers 23 have been used as the waste to remove heavy metals from wastewaters. The removal of heavy metal ions from waters using tea waste is essentially a three-step process: (i) adsorption, (ii) surface precipitation, and (iii) fixation 24 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Çelebi

Gök

2020

Sci Rep

134

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Recently, the search for low-cost eco-friendly adsorbents has become one of the main objectives of researchers. The aim of this study was to test the removal of four heavy metals, namely lead (Pb), zinc (Zn), nickel (Ni) and cadmium (Cd), from a simulated watery solution using brewed tea waste as a potentially suitable adsorbent. The effects of pH levels (2.0–6.0), adsorbent amount (0.1–5.0 g), contact times (1–150 min.) were examined throughout the adsorption process. The results of the experiments showed that the heavy metals elimination yields had an inverse relationship with pH and a linear relationship between the other parameters. The optimum pH for the removal of the heavy metals was between 4.0 and 5.0 in the case of the brewed tea waste. Equilibrium times of 2, 10, 30 and 5 min were required for the adsorption of Pb, Zn, Ni, Cd onto Camellia sinensis, respectively. Based on the results of this study it can be said that brewed tea waste has a high potential to remove heavy metals from aqueous solutions. The maximum adsorption capacities were calculated as 1.197, 1.457, 1.163 and 2.468 mg/g, for Pb, Zn, Ni and Cd, respectively, by fitting the equilibrium data to the Langmuir isotherm model.

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Section: Introductionmentioning

confidence: 99%

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Çelebi

Gök

2020

Sci Rep

134

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“…The characteristics of activated carbons were optimized in order to achieve high pollutant removal efficiency in shortest time possible. The proposed solution, in contrast to those presented in other papers [ 57 , 58 , 59 ] is universal, because it enables to analyze the influence of the analyzed sorbent (here: activated carbon) and employed oxidizer as well as their properties. The previous models usually did not account for these aspects and considered only a single activated carbon, which led to their numerous limitations.…”

Section: Methodsmentioning

confidence: 99%

Modeling and Optimization of Pollutants Removal during Simultaneous Adsorption onto Activated Carbon with Advanced Oxidation in Aqueous Environment

Dąbek

Picheta-Oleś²,

Szeląg

et al. 2020

Materials

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The paper presents the results of studies on the modeling and optimization of organic pollutant removal from an aqueous solution in the course of simultaneous adsorption onto activated carbons with varied physical characteristics and oxidation using H2O2. The methodology for determining the models used for predicting the sorption and catalytic parameters in the process was presented. The analysis of the influence of the sorption and catalytic parameters of activated carbons as well as the oxidizer dose on the removal dynamics of organic dyes-phenol red and crystal violet-was carried out based on the designated empirical models. The obtained results confirm the influence of specific surface area (S) of the activated carbon and oxidizer dose on the values of the reaction rate constants related to the removal of pollutants from the solution in a simultaneous process. It was observed that the lower the specific surface area of carbon (S), the greater the influence of the oxidizer on the removal of pollutants from the solution. The proposed model, used for optimization of parameters in a simultaneous process, enables to analyze the effect of selected sorbents as well as the type and dose of the applied oxidizer on the pollutant removal efficiency. The practical application of models will enable to optimize the selection of a sorbent and oxidizer used simultaneously for a given group of pollutants and thus reduce the process costs.

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“…Eq. 1 [26,27] was used to calculate the percentage yield of prepared samples. Second order polynomial equation (Eq.…”

Section: Percentage Yieldmentioning

confidence: 99%

“…The minimum number of experimental runs required for given number of factors ( ) can be calculated by Eq. (3)[27]. important factors with their ranges were selected from literature.…”

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confidence: 99%

Optimization of low-cost cow dung based activated carbon for the removal of carbofuran from aqueous solution

Mustafa

Hussain

Wasim

et al. 2021

CI&CEQ

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Water pollution has become a serious issue of this century due to increased industrialization. Several methods have been adopted to tackle this issue including adsorption by activated carbon (AC). Conventional sources of AC preparation are costly and non-renewable as well. Several fruit and agricultural wastes have characteristics to become sustainable feedstock for AC preparation. This study aims to prepare cost effective AC from sustainable raw material, cow dung. The preparation has been analyzed and optimized by utilizing central composite design (CCD). The effect of activation temperature, time, and impregnation ratio (IR) on responses of percent yield (R1) and percent pesticide removal (R2) has been analyzed. Quadratic models have been suggested with R2, adjusted R2, and predicted R2 values of 0.98, 0.96 ,0.89 for R1 and 0.97, 0.94 and 0.87 for R2, respectively. Activation temperature and KOH/Feedstock ratio significantly influence the yield and pesticide removal. Optimized conditions of activation temperature, KOH/Feedstock ratio, and activation time are 708.07 0C, 1.22 and 0.66 hrs respectively. Thees conditions produced 14.78 % yield and 89.18% pesticide removal. SEM and BET analysis of optimized AC also confirmed porosity development and large surface area availability due to activation process. Findings of this study suggest that cow dung can be used to prepare low cost AC for pesticide removal from aqueous solution.

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Optimization and modeling of aqueous Cr(VI) adsorption onto activated carbon prepared from sugar beet bagasse agricultural waste by application of response surface methodology

Cited by 82 publications

References 44 publications

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Modeling and Optimization of Pollutants Removal during Simultaneous Adsorption onto Activated Carbon with Advanced Oxidation in Aqueous Environment

Optimization of low-cost cow dung based activated carbon for the removal of carbofuran from aqueous solution

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