Improvement in phenol adsorption capacity on eco-friendly biosorbent derived from waste Palm-oil shells using optimized parametric modelling of isotherms and kinetics by differential evolution

2021 ◽  
Vol 164 ◽  
pp. 113333
Author(s):  
J.N. Sahu ◽  
Rama Rao Karri ◽  
N.S. Jayakumar
Keyword(s):  
Differential Evolution ◽  
Adsorption Capacity ◽  
Palm Oil ◽  
Parametric Modelling ◽  
Phenol Adsorption

Solution blowing of activated carbon nanofibers for phenol adsorption

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5801-5808 ◽  
Author(s):  
Xiaoxiao Tao ◽  
Guoqing Zhou ◽  
Xupin Zhuang ◽  
Bowen Cheng ◽  
Xiaojie Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Carbon Nanofibers ◽  
Phenol Adsorption ◽  
Solution Blowing ◽  
Activated Carbon Nanofibers ◽  
Special Surface

Activated carbon nanofibers fabricated through solution blowing and activation possessed a high special surface area and excellent adsorption capacity.

scholarly journals Sequential Production of Levulinic Acid and Porous Carbon Material from Cellulose

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1408 ◽  
Author(s):  
Shimin Kang ◽  
Jiaming Pan ◽  
Guoting Gu ◽  
Chong Wang ◽  
Zepan Wang ◽  
...  
Keyword(s):  
Formic Acid ◽  
Adsorption Capacity ◽  
Porous Carbon ◽  
Carbon Material ◽  
Levulinic Acid ◽  
Total Carbon ◽  
Porous Carbon Material ◽  
Solid Residue ◽  
Phenol Adsorption ◽  
Zncl2 Activation

A sequential production of levulinic acid (LA) and porous carbon material (CM) from cellulose was conducted by a two-step process. The cellulose was first acid hydrolyzed, and the preferred reaction conditions required a severity factor of 4.0–4.5, in which the yields of LA, formic acid, and solid residue were 38 ± 3 wt%, 17 ± 3 wt%, and 15 ± 3 wt%, respectively. The solid residue was further used for CM preparation through pyrolysis, with or without ZnCl2 activation. The ZnCl2 activation promoted the formation of CMs with improved thermal stability, high surface area (1184–2510 m2/g), and excellent phenol adsorption capacity (136–172 mg/g). The used CM can be easily regenerated by a simple methanol Soxhlet extraction process, and a comparable phenol adsorption capacity of 97 mg/g was maintained for the 5th reusing. Finally, 100 g cellulose produced 40.5 g LA, 18.9 g formic acid and 8.5 g porous CM, with a total carbon utilization ratio reaching 74.4%.

Comparative Study of Phenol Adsorption from Aqueous Solution onto Four Kinds of Absorbents

2014 ◽  
Vol 1056 ◽  
pp. 134-137
Author(s):  
Wei Fang Dong ◽  
Li Hua Zang ◽  
Xin Pang
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Fly Ash ◽  
Comparative Study ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Contact Time ◽  
Carbon Powder ◽  
Nay Zeolite ◽  
Phenol Adsorption

The absorbents including MnO2, fly ash, NaY zeolite and activated carbon powder were used to study the adsorption capacity of phenol. The effect of contact time and dosage of absorbents on the removal efficiency were investigated. The experimental results suggested that activated carbon powder is most effective absorbent, following as fly ash, MnO2 and NaY zeolite which the removal efficiency could reached 98.41%,77.65%, 60.19% and 24.13% at 90min respectively. The data indicated that the activated carbon powder was favorable for adsorption while NaY zeolite was unfit for absorbent of phenol from aqueous solution due to lower removal.

Microwave Preparation of Modified Activated Carbons for Phenol Adsorption in Aqueous Solution

2013 ◽  
Vol 726-731 ◽  
pp. 1883-1889
Author(s):  
Brim Stevy Ondon ◽  
Bing Sun ◽  
Zhi Yu Yan ◽  
Xiao Mei Zhu ◽  
Hui Liu
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Activated Carbons ◽  
Microwave Energy ◽  
Adsorptive Capacity ◽  
Obvious Effect ◽  
Phenol Adsorption ◽  
Adsorption Capacities ◽  
Modified Activated Carbons

Microwave energy was used to prepare modified activated carbons (GAC, GAC/MW, GAC/Ni, and GAC/Cu). The modified activated carbons were used for phenol adsorption in aqueous solution. The adsorption conditions were optimized. Adsorption capacities of the different modified activated carbons were evaluated. The effect of microwave pretreatment of activated carbons was investigated. A comparative study on the activated carbons adsorption capacities was also investigated. Under optimal conditions the results showed that there was no obvious effect on activated carbons adsorption when rising temperature and pH during the adsorption process. Stirring has a very high effect on the activated carbons adsorption capacity. The adsorption capacity of the modified activated carbons reaches 95%. MW/GAC, GAC/Ni and GAC/Cu adsorptive capacity was higher compared to the Granulated Activated Carbon (GAC) used as received. GAC treated with microwave energy has highest adsorption capacity. The adsorption capacity of GAC loaded with ion Ni2+ is higher than the activated carbon loaded with Cu2+. The untreated GAC has the lowest adsorption capacity. These results can be explained by the effect of microwave irradiation on GAC.The activated carbon loaded with Ni2+ adsorbs more microwave energy than the GAC loaded with Cu2+.

NARMAX model identification of a palm oil biodiesel engine using multi-objective optimization differential evolution

2017 ◽  
Author(s):  
Zakwan Mansor ◽  
Mohd Zakimi Zakaria ◽  
Azuwir Mohd Nor ◽  
Mohd Sazli Saad ◽  
Robiah Ahmad ◽  
...  
Keyword(s):  
Differential Evolution ◽  
Palm Oil ◽  
Model Identification ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Palm Oil Biodiesel

scholarly journals Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

2019 ◽  
Vol 2019 ◽  
pp. 1-18
Author(s):  
Marcel Cédric Deussi Ngaha ◽  
Evangéline Njanja ◽  
Giscard Doungmo ◽  
Arnaud Tamo Kamdem ◽  
Ignas Kenfack Tonle
Keyword(s):  
Mass Transfer ◽  
Adsorption Capacity ◽  
Adsorption Isotherms ◽  
Palm Oil ◽  
Cetyltrimethylammonium Bromide ◽  
Diffusion Mechanism ◽  
Indigo Carmine ◽  
X Ray Diffraction ◽  
Batch Mode ◽  
Pseudo Second Order

In the present work, the usefulness of cetyltrimethylammonium bromide-modified palm oil fiber (CTAB-modified POF) for the removal of indigo carmine (IC) and 2,6-dichlorophenolindophenol (2,6-DCPIP) from aqueous solutions was investigated. Raw, NaOH-treated, and CTAB-modified POF were characterized by Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis, thermogravimetric-hyperdifferential scanning calorimetric (TG-HDSC) analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The adsorption studies of IC and 2,6-DCPIP were performed in batch mode using CTAB-modified POF. The results showed that equilibrium was attained after a contact time of 30 minutes for IC and 20 minutes for 2,6-DCPIP. The maximum capacity of adsorption was obtained at pH = 2. The capacity of adsorption considerably increased with modified biosorbents and with increasing initial concentration of dyes. The ionic strength favors the increasing adsorption capacity of IC and does not affect the adsorption capacity of 2,6-DCPIP. The percentage of adsorption increased with increasing mass of the biosorbents. The nonlinear regression of adsorption isotherms showed that Freundlich (r2 = 0.953; χ2 = 4.398) and Temkin (r2 = 0.986; χ2 = 1.196) isotherms are most appropriate to describe the adsorption of IC and 2,6-DCPIP on CTAB-modified POF, respectively. The maximum adsorption capacities determined by the Langmuir isotherm were 275.426 and 230.423 μmol·g−1 for IC and 2,6-DCPIP, respectively. The linear regression of adsorption kinetics was best described by the pseudo-second-order model (R2 ≥ 0.998). The diffusion mechanism showed that external mass transfer is the main rate controlling step. Desorption of the two dyes is favorable in the alkaline medium.

scholarly journals Purification of Wastewater from Biomass-Derived Syngas Scrubber Using Biochar and Activated Carbons

2021 ◽  
Vol 18 (8) ◽  
pp. 4247
Author(s):  
Enrico Catizzone ◽  
Corradino Sposato ◽  
Assunta Romanelli ◽  
Donatella Barisano ◽  
Giacinto Cornacchia ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Carbon Materials ◽  
Activated Carbons ◽  
Scale Up ◽  
Textural Properties ◽  
Point Of View ◽  
Design Parameters ◽  
Phenol Removal ◽  
Phenol Adsorption ◽  
Common Strategy

Phenol is a major component in the scrubber wastewater used for syngas purification in biomass-based gasification plants. Adsorption is a common strategy for wastewater purification, and carbon materials, such as activated carbons and biochar, may be used for its remediation. In this work, we compare the adsorption behavior towards phenol of two biochar samples, produced by pyrolysis and gasification of lignocellulose biomass, with two commercial activated carbons. Obtained data were also used to assess the effect of textural properties (i.e., surface area) on phenol removal. Continuous tests in lab-scale columns were also carried out and the obtained data were processed with literature models in order to obtain design parameters for scale-up. Results clearly indicate the superiority of activated carbons due to the higher pore volume, although biomass-derived char may be more suitable from an economic and environmental point of view. The phenol adsorption capacity increases from about 65 m/g for gasification biochar to about 270 mg/g for the commercial activated carbon. Correspondingly, service time of commercial activated carbons was found to be about six times higher than that of gasification biochar. Finally, results indicate that phenol may be used as a model for characterizing the adsorption capacity of the investigated carbon materials, but in the case of real waste water the carbon usage rate should be considered at least 1.5 times higher than that calculated for phenol.

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