Optimization of activated carbon preparation from cassava stem using response surface methodology on surface area and yield

Sulaiman, Nurul Syuhada; Hashim, Rokiah; Amini, Mohd Hazim Mohamad; Danish, Mohammed; Sulaiman, Othman

doi:10.1016/j.jclepro.2018.07.061

Cited by 112 publications

(45 citation statements)

References 36 publications

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“…The F‐value measures the variance of the data about the mean, expressed as the ratio of the mean square of group variance to the mean square of the error. A model term is said to be significant if it possesses a high F‐value and Prob>F less than 0.05 . As shown in Table , the P ‐value of the model is P < 0.0001, implying that the model is significant.…”

Section: Resultsmentioning

confidence: 99%

“…A model term is said to be significant if it possesses a high F-value and Prob>F less than 0.05. 23 As shown in Table 3, the P-value of the model is P < 0.0001, implying that the model is significant. In addition, the linear effects of the coefficients X 1 , X 2 , and X 3 , the interactive effects of the coefficients X 1 X 2 , X 1 X 3 , and X 2 X 3 , and the quadratic terms X 1 2 , X 2 2 , and X 3 2 are significant model terms with respect to the response because they all have P-values of P < 0.0001.…”

Section: Response Surface Methodology To Optimize Reaction Conditionsmentioning

confidence: 91%

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Efficient racemization of N‐phenylacetyl‐D‐glufosinate for L‐glufosinate production

Xue

et al. 2019

Chirality

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Most amino acids contain chiral centres and exist as both D‐enantiomer and L‐enantiomer. The optically pure enantiomer is often more valuable than the racemate. Enzymatic resolution provides an effective strategy to obtain optically pure amino acids but often results in large amounts of unwanted isomer. In this study, optically pure L‐glufosinate (L‐PPT) was obtained by coupling amidase‐mediated hydrolysis of N‐phenylacetyl‐D,L‐glufosinate with racemization of N‐phenylacetyl‐D‐glufosinate (NPDG), which exclusively exhibits effective herbicidal properties compared with its D‐enantiomer. To improve the yield of L‐PPT, the racemization reaction conditions were optimized, and through single‐factor experiments, the optimal reaction temperature, reaction time, and mole ratio of phenylacetic acid to NPDG were determined to be 150°C, 30 minutes, and 1.5, respectively. The response surface methodology was applied to further optimize the racemization conditions, and the final yield of L‐PPT reached 96.13% with optimum reaction temperature of 154°C, reaction time of 23 minutes, and phenylacetic acid/NPDG mole ratio of 1.7, respectively. Moreover, adding a small amount of acetic anhydride further raised the yield of L‐PPT to 97.02%.

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Section: Resultsmentioning

confidence: 99%

Section: Response Surface Methodology To Optimize Reaction Conditionsmentioning

confidence: 91%

Efficient racemization of N‐phenylacetyl‐D‐glufosinate for L‐glufosinate production

Xue

et al. 2019

Chirality

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“…Activated carbons are widely used as an adsorbent in wastewater and gas treatments. Activated carbon was used in many applications such as an adsorbent in wastewater, gold purification, metal extraction, gas treatments, medicine, and sewage treatment and as filters in compressed air 6 .…”

Section: Introductionmentioning

confidence: 99%

A novel approach for producing low cost and highly efficient activated carbon for removing cationic dyes

Moughaoui¹,

Ouaket²,

Laaraibi³

et al. 2019

Mediterr.J.Chem.,

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Chemical activation was used to prepare a low-cost activated carbon (AC) from an agricultural waste material: sugarcane bagasse. It was used as a green biosorbent for the removal of two cationic dyes from aqueous solutions (Methylene blue (MB) and Malachite Green (MG)). Central composite design (CCD) using response surface methodology (RSM) was applied in this work in order to run a limited number of experiments. The possibility of revealing the interaction of three selected factors: activation temperature, activation time, and chemical impregnation ratios at different levels for the process of preparing the AC were studied. Two-second order quadratic regression models for a yield of AC and capacity of adsorption were developed using JMP Software.The results of the process of optimization were carried out; it showed a good agreement between the predictive response of RSM model and the obtained experimental values with high correlation coefficients (R2) which indicates the efficacy of the model. The optimal activated carbon was obtained using 400Â°C activation temperature, 36 min activation time, and 2 impregnation ratio, resulting in 63.12 % of AC yield and 99.86 % for MB removal and 400Â°C activation temperature, 90 min activation time and 2 impregnation ratio, resulting in 45.69 % of AC yield and 99.75 % for MG removal. Moreover, the comparison between the experimental and the predicted values at optimum conditions was in good agreement with relatively small errors.This work showed the effectiveness and the performance of preparing activated carbon from sugarcane bagasse, and it recommended as an effective and green biosorbent for the removal of cationic dyes from aqueous solutions.

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“…Among the residues used to produce activated carbon are, for example, residues of cassava processing industry [3,4], Pinus barks [5,6], açaí seeds [7,8], banana barks [9] and others.…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb2+ and Cd2+ From Contaminated Water Using Activated Carbon from Canola Seed Wastes

Gonçalves¹,

Schiller²,

Conradi³

et al. 2019

World Congress on New Technologies

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The objective of this work was to produce activated carbon chemically from canola seeds wastes and to apply the activated carbon produced in the sorption of Pb 2+ and Cd 2+ from contaminated water. The activation of the canola seeds wastes was performed with NaOH (1 mol L -1 ) for 6 h under constant stirring. Then the activated material was pyrolyzed for 1 h at 750 °C. The activated carbon was subjected to nitroperchloric digestion for the determination of P, K, Ca, Mg, Mn, Zn, Cu and Pb by flame atomic absorption spectrometry (FAAS). It was also realized the thermogravimetric evaluation (TG), infrared spectra (FT-IR), pHPCZ and scanning electron microscopy (SEM). The metals were evaluated for ideal amounts of adsorbent dose and pH and kinetic, thermodynamic and equilibrium parameters. The mass and pH results demonstrated that four grams of adsorbent is needed to decontaminate one liter of contaminated solution. Linearization were obtained by the mathematical models of Langmuir, Freundlich and D-R, with high capacity of removal of both metals. Thus, using canola waste to produce activated carbon it is possible to add value to the canola seed wastes, also, it contributes directly with the economic, social and environmental sustainability of this productive system.

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Optimization of activated carbon preparation from cassava stem using response surface methodology on surface area and yield

Cited by 112 publications

References 36 publications

Efficient racemization of N‐phenylacetyl‐D‐glufosinate for L‐glufosinate production

Efficient racemization of N‐phenylacetyl‐D‐glufosinate for L‐glufosinate production

A novel approach for producing low cost and highly efficient activated carbon for removing cationic dyes

Removal of Pb2+ and Cd2+ From Contaminated Water Using Activated Carbon from Canola Seed Wastes

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