Optimization of 4-nonylphenol adsorption on activated carbons derived from safou seeds using response surface methodology

Atemkeng, Cyrille Donlifack; Anagho, Gabche Solomon; Tagne, Rufis Fregue Tiegam; Amola, Liouna Adoum; Bopda, Aurelien; Kamgaing, Théophile

doi:10.1016/j.cartre.2021.100052

Cited by 12 publications

(6 citation statements)

References 41 publications

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“…The values of 1/n at different temperatures lies in the range of 0.1−1, indicating adsorption was easy [47]. Furthermore, the maximum adsorption capacity q m of 4−NP calculated from the Langmuir model at 25, 35, and 45 • C was 46.63, 35.61, and 26.89 mg/g, respectively, which was higher than that of 4−NP on some adsorbents (e.g., activated carbon, 39.49 mg/g) [48]. As shown in Table 3, it was observed that R 2 value of Temkin isotherm was lower than 0.9070, which suggested that there was a weak interior molecular force between Mg/Si 1:6 and 4−NP in adsorption processes [23].…”

Section: Adsorption Mechanism Of 4−np By Magnesium Silicatementioning

confidence: 91%

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Zhang

Rao

et al. 2022

Materials

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Nonylphenol (NP) is considered to be an environmentally toxic, endocrine-disrupting chemical that affects humans and ecosystems. Adsorption is one of the most promising approaches for the removal of nonylphenol contamination from water. Herein, in order to design an adsorbent with high adsorption capacity, magnesium silicate with different Mg/Si ratios was successfully synthesized by a sol–gel method at 60 °C. Magnesium silicate with a Mg/Si ratio of 1:6 was found to possess the best adsorption performance, with maximum 4−NP sorption 30.84 mg/g under 25 °C and 0.2 g/L adsorbent dose. The adsorption was negatively affected by increasing adsorbent dose and temperature. The kinetics and isotherm of 4−NP adsorption by Mg/Si were well described by the pseudo−second−order and Sips model, respectively, and behavior was proven to be physisorption−enhanced by a chemical effect. Detailed characterization by XRD, BET, and SEM confirmed that the magnesium silicate possesses an amorphous, mesoporous structure. The study will contribute to the applicability of cheap magnesium silicate for removal of NP contamination in water.

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Section: Adsorption Mechanism Of 4−np By Magnesium Silicatementioning

confidence: 91%

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Zhang

Rao

et al. 2022

Materials

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“…e experimental data from predesigned tests are analyzed by the response surface methodology (RSM) to create a model relating to the independent variables and the responses [13,18]. e central composite design reduces the number of error attempts needed to evaluate the effect of interactions between the different factors that govern a process [26].…”

Section: Central Composite Design As Optimization Approachmentioning

confidence: 99%

“…It thus becomes essential to turn to techniques that require renewable resources to the detriment of fossil resources. It is as a result of this that adsorption that can be done on several types of adsorbent supports [13][14][15][16] became the most coveted industrial depollution technique. Recently, safou seeds have shown interesting adsorption properties [17].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, safou seeds have shown interesting adsorption properties [17]. Adsorption has attracted further attention due to advantages such as ease of use, low energy consumption, high efficiency, cost-effectiveness, flexibility, and a wide variety of existing adsorbent systems [1,3,13,18]. e latter is even more advantageous when the adsorbent support is available and abundant.…”

Section: Introductionmentioning

confidence: 99%

“…In that case, the RSM has been widely applied in chemical engineering and the environment field. us, the central composite design (CCD) under RSM can result in an empirical model due to combined effective parameters and corresponding interactions to optimize the adsorption process [13,24,25]. e aims of this research are as follows:…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic, Nonlinear Kinetic, and Isotherm Studies of Bisphenol A Uptake onto Chemically Activated Carbons Derived from Safou (Dacryodes edulis) Seeds

Atemkeng

Tamo

Doungmo

et al. 2022

Journal of Chemistry

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The interest of this work is to evaluate the possibility of using safou seeds to develop a new low-cost adsorbent and study its application to remove bisphenol A from an aqueous solution for a sustainable and ecological use of this biomass. This was done by optimizing some parameters that influence the adsorption process. The central composite design with four centre points was used to optimize the process variables. The concentration of bisphenol A solution, adsorbent dosage, stirring time, and solution pH on the adsorption capacity were considered, while the response measured was the quantity adsorbed. The activated carbon obtained by treatment with H2SO4 was named NSST and that obtained by treatment with H3PO4 was named NSPT. XRD revealed an amorphous character for the ACs, and EDXS showed they are mainly carbonaceous. Under the optimal adsorption conditions, NSPT showed the best performance. Correlation coefficients R2 and R2adj were of 85.13 and 69.12% for NSPT and 83.71 and 66.17% for NSST. A pseudo-second-order nonlinear kinetic model best described the adsorption kinetic of BPA removal by the ACs. Langmuir’s isotherm best described the adsorption of BPA onto both adsorbents. Thermodynamic studies suggested an exothermic and physisorption process.

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Endocrine Disruptors

Luján‐Facundo,

Ferrer‐Polonio,

Piá

et al. 2024

Handbook of Water Pollution

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Optimization of 4-nonylphenol adsorption on activated carbons derived from safou seeds using response surface methodology

Cited by 12 publications

References 41 publications

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Efficient Removal of Nonylphenol Contamination from Water Using Optimized Magnesium Silicate

Thermodynamic, Nonlinear Kinetic, and Isotherm Studies of Bisphenol A Uptake onto Chemically Activated Carbons Derived from Safou (Dacryodes edulis) Seeds

Endocrine Disruptors

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