Elaeis guineensis-activated carbon for methylene blue removal: adsorption capacity and optimization using CCD-RSM

Araújo, Leylia K. F.; Albuquerque, Allan Almeida; Ramos, Weslley C. O.; Santos, Alef T.; Carvalho, Sandra Helena Vieira de; Soletti, João Inácio; Bispo, Mozart Daltro

doi:10.1007/s10668-020-01137-7

Cited by 17 publications

(5 citation statements)

References 51 publications

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“…The leaves were removed at different stages of life. The CL were cut into pieces and dried in an oven (Fanem, Orion 515, São Paulo, Brazil) at 100° C for 24 h [17][18][19]. The proximate analysis was carried out in triplicate according to the standard methodology from American Society for Testing and Materials (ASTM)-D1762-1984 [20].…”

Section: Raw Materialsmentioning

confidence: 99%

“…A thermostatic bath (Tecnal, TE-184, Brazil) was used to cool the liquid products down to 4° C. A vacuum pump (Fanem, 089/CAL, Brazil) was used to keep a negative pressure of 20 kPa within the system. Pyrolysis experiments were carried out in triplicate using 250 g of CL during a residence time of 2 h [17,20]. Biochar and bio-oil yields were calculated using Equation 1.…”

Section: Preparation Of Activated Carbonmentioning

confidence: 99%

“…The kinetic study, were performed in a finite bath at 27 ± 2° C, with Erlenmeyers (250 mL) were filled with 30 mL of CFN solution, in two different concentrations, 75 and 125 mg.L -1 , and 50 mg of activated biochar (dp < 0.212 mm). The solutions were kept under constant agitation of 140 rpm (Shaker SL 222 incubator) under time intervals between 2 and 120 min [17]. For each time, the samples were obtained and separated by centrifugation (Solab, SL-700) for 5 min at 3,000 rpm.…”

Section: Kinetic Studymentioning

confidence: 99%

“…For each time, the samples were obtained and separated by centrifugation (Solab, SL-700) for 5 min at 3,000 rpm. The concentration of CFN in the sample was obtained by a UV-vis spectrophotometer (Shimadzu, UV 1800 Spectrophotometer, Japan), at a wavelength of 272 ηm [17].The adsorption capacity (𝑞 𝑡 , mg•g -1 ) was calculated by Equation 2.…”

Section: Kinetic Studymentioning

confidence: 99%

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Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

Oliveira

Meneses

Melo

et al. 2022

Environ Sci Pollut Res

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The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500º C and activation with potassium carbonate.The activated carbon was used for caffeine removal from aqueous solution. The coconut leaves activated carbon showed a predominantly amorphous structure from X-ray diffraction analysis and a pH at the zero charge point of 7.9. From the N2 adsorption/desorption method, the adsorbent showed a predominance of mesopores, with average pore size of 45.48 ηm and a surface area of 678.03 m 2 /g. From kinetic studies the data followed the pseudo-second order, where the intraparticle diffusion can be neglected. The adsorption isotherms were satisfactorily adjusted for the Redlich-Peterson model and a type curve L was identified. The thermodynamic parameters showed that adsorption occurred spontaneously, was exothermic and governed by physical adsorption. The artificial neural networks developed were capable of predicting both kinetics and equilibrium adsorption data under different operating conditions and was comparable to the traditional models available in literature in the training experiments, encouraging its use for data generalization when an efficient dataset is used. In conclusion, coconut leaves waste showed to be a promising feedstock to produce activated carbon aiming caffeine removal from water and wastewater.

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Section: Raw Materialsmentioning

confidence: 99%

Section: Preparation Of Activated Carbonmentioning

confidence: 99%

Section: Kinetic Studymentioning

confidence: 99%

Section: Kinetic Studymentioning

confidence: 99%

See 2 more Smart Citations

Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

Oliveira

Meneses

Melo

et al. 2022

Environ Sci Pollut Res

Self Cite

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“…Hence, predictive analytics studies are used by scientists for resolving environmental problems. 18,20,21 Thus, response surface methodology (RSM) can be used to study the effect of different variables influencing the removal of Cr(VI) from water in order to determine the best possible operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Use of experimental design to evaluate the adsorption of chromium (VI) by alginate/polyaniline beads

Abdelmajid¹,

Benkhaled

Attar

et al. 2022

JSCS

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Within, low-cost decorated sodium alginate beads with polyaniline (Alg@PANI beads) were easily prepared using a cross-linking method, and employed for the adsorption of Cr(VI) from aqueous solutions. The effect of several influencing parameters, including temperature, contact time, Cr(VI) con-centration, and adsorbent dosage, was investigated and optimized using central composite design (CCD) under response surface methodology (RSM). The analysis of variance (ANOVA) of the quadratic model and the analyzed model revealed that models were statistically significant, with a low P-value (<0.0001) and a higher correlation coefficient value (R2 = 0.93). The optimum parameters for total adsorption were as follows: adsorbent dose = 0.027 g, pH 2, contact time = 45 min, temperature = 38 ?C, and Cr(VI) concentration = 29.24 ppm. The findings of this study indicate that the prepared Alg@PANI beads could be used effectively to remove Cr(VI) ions from aqueous solutions.

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Experimental, computational analysis of Butein and Lanceoletin for natural dye-sensitized solar cells and stabilizing efficiency by IoT

Bradha

Nagaraj

Suvitha

et al. 2021

Environ Dev Sustain

105

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Elaeis guineensis-activated carbon for methylene blue removal: adsorption capacity and optimization using CCD-RSM

Cited by 17 publications

References 51 publications

Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

Use of experimental design to evaluate the adsorption of chromium (VI) by alginate/polyaniline beads

Experimental, computational analysis of Butein and Lanceoletin for natural dye-sensitized solar cells and stabilizing efficiency by IoT

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