scholarly journals PREPARATION AND CHARACTERIZATION OF ACTIVATED CARBON FROM OIL-PALM FIBER AND ITS EVALUATION FOR METHYLENE BLUE ADSORPTION

2021 ◽  
Vol 55 (3) ◽  
Author(s):  
Yuqi Wang ◽  
Jian Pan ◽  
Yanhui Li ◽  
Pengfei Zhang ◽  
Xiaoping Zhang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Oil Palm ◽  
Adsorption Equilibrium ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Palm Fiber ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model ◽  
The Impact

A new type of activated carbon was produced from oil-palm fiber using steam activation. Scanning electron microscopy (SEM) was performed on the surface of oil-palm-fiber activated carbon (OPF-AC). The spectra of OPF-AC was investigated with Fourier-transform infrared (FTIR) spectroscopy. The effects of the temperature, adsorbent dose, adsorption time and pH on the adsorption properties of methylene blue on OPF-AC were discussed. The Langmuir adsorption model and Freundlich adsorption model were used to find the adsorption equilibrium isotherm. Adsorption kinetics were employed to explain the adsorption process and predict the adsorption efficiency. The Van’t Hoff equation was used to assess the impact exerted by the adsorption temperature on the adsorbing process. According to the results, the data of the adsorption equilibrium of OPF-AC fit well the Langmuir adsorption model and the kinetics data can be gathered into a pseudo-second-order kinetic model. The adsorption behavior of methylene blue on OPF-AC was endothermic and spontaneous. The total pore volume and BET surface area of OPF-AC reached 0.7809 cm3/g and 1018.84 m2/g, respectively. The maximum adsorption capacity of OPF-AC was 862.07 mg/g at 323 K. Accordingly, the gratifying adsorption of OPF-AC endows it with a promising prospect in the application field of agricultural adsorbents.

Adsorption of Ni2+ and Cu2+ from Aqueous Solution by Polyethylenimine Impregnation of Metal–Organic Frameworks

NANO ◽  
2020 ◽  
Vol 15 (03) ◽  
pp. 2050029 ◽  
Author(s):  
Dan Wang ◽  
Xinfeng Xiao ◽  
Bo Han ◽  
Weiming Ni ◽  
Yu Gao ◽  
...  
Keyword(s):  
Order Kinetic ◽  
Adsorption Model ◽  
Elution Time ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model ◽  
Adsorption Capacities ◽  
Order Kinetic Model ◽  
Metal Organic ◽  
Pseudo Second Order

A series of UiO-66-PEI materials were obtained by impregnating UiO-66 with different amounts of polyethylenimine (PEI) with UiO-66 as the basic skeleton material. The materials were used as adsorbents to remove Ni[Formula: see text] and Cu[Formula: see text] from water. The prepared UiO-66-PEI-30 had good adsorption capacity on Ni[Formula: see text] and Cu[Formula: see text] at 30% PEI. The adsorption of Ni[Formula: see text] and Cu[Formula: see text] with UiO-66-PEI-30 was further studied. The role of eluent types, elution time, concentration and volume on the effect of Cu[Formula: see text] elution was investigated. The adsorption of Ni[Formula: see text] and Cu[Formula: see text] by UiO-66-PEI-30 followed the pseudo-second-order kinetic model and Langmuir adsorption model. The maximum adsorption capacities obtained by Langmuir fitting for Ni[Formula: see text] and Cu[Formula: see text] were 11.54[Formula: see text]mg[Formula: see text]g[Formula: see text] and 24.87[Formula: see text]mg[Formula: see text]g[Formula: see text], respectively. After four desorption/adsorption experiments, UiO-66-PEI-30 still showed good adsorption performance. UiO-66 impregnated with PEI was an adsorbent with adsorption potential.

scholarly journals Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

2021 ◽  
Author(s):  
Ali H. Jawad ◽  
Ahmed Saud Abdulhameed ◽  
Noor Nazihah Bahrudin ◽  
Nurul Nadiah Mohd Firdaus Hum ◽  
S. N. Surip ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Type I ◽  
Order Kinetic ◽  
Bagasse Waste

Abstract In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

scholarly journals Determination of the absolute CH4 adsorption using simplified local density theory and comparison with the modified Langmuir adsorption model

RSC Advances ◽  
2018 ◽  
Vol 8 (72) ◽  
pp. 41509-41516
Author(s):  
Yeyu Zhang ◽  
Shaonan Zhang ◽  
Zhicheng Wang ◽  
Hucheng Deng ◽  
Minghui Qi ◽  
...  
Keyword(s):  
Shale Gas ◽  
Local Density ◽  
Gas Storage ◽  
Adsorption Model ◽  
Gas Reservoirs ◽  
Methane Recovery ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model ◽  
Ch4 Adsorption

Accurately determining the adsorbed amount of CH4 on shale is significant for understanding the mechanisms of shale gas storage and shale methane recovery from shale gas reservoirs.

Characterization of Adsorbents Derived from Palm Fiber Waste and its Potential on Methylene Blue Adsorption

2020 ◽  
Vol 841 ◽  
pp. 273-277
Author(s):  
Ariany Zulkania ◽  
Muhammad Iqbal ◽  
Syamsumarlin
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Methylene Blue Adsorption ◽  
Palm Fiber ◽  
Methylene Blue Removal ◽  
Phosphoric Acid Concentration

In this study, two types of adsorbent including activated carbon and bio-sorbent were produced from Palm fiber wastes (PFW), which were activated by phosphoric acid. The influence of adsorbent type and phosphoric acid concentration on methylene blue adsorption was investigated. The most optimum adsorbent was determined based on adsorption capacity and removal percentage of each adsorbent. The result shows that 9.984 mg/g of adsorption capacity and 99.84% of removal percentage were achieved in 90 minutes’ adsorption, which demonstrates the huge potential of bio-sorbent and was chosen to be the most optimum adsorbent based on methylene blue removal. The characterization of bio-sorbent was then investigated using FTIR and SEM. FTIR result shows that bio-sorbent contains cellulose which affected the adsorption process while SEM result shows the cleaner pores and surface compared to bio-sorbent before activation.

Investigation of Ultrasonic Effects in Cotton Dyeing Processing

2013 ◽  
Vol 787 ◽  
pp. 138-142 ◽  
Author(s):  
De Shuai Sun ◽  
Long Fang ◽  
Tao Liu
Keyword(s):  
Cotton Fiber ◽  
Ultrasound Irradiation ◽  
Cotton Fabrics ◽  
Dye Uptake ◽  
Adsorption Model ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model ◽  
Dyeing Process ◽  
Direct Dye ◽  
Ultrasound Dyeing

Ultrasound can promote the dye-uptake in the dyeing process. The effects of ultrasound on the fiber, dye and dyeing system were investigated by dyeing cotton fabrics with a direct dye. The dye exhaustion exceeded 80% in 30 minutes with the assistant of ultrasound. Langmuir adsorption model could descript the ultrasound dyeing process of direct dye. The area of fiber accessibility of cotton fiber increased 1.68 times under the action of ultrasound. The absorbance of direct dye solution increased remarkably in the first 10 minutes of ultrasound irradiation. Ultrasound accelerated the diffusion of dye on cotton fiber, and then the diffusion coefficient increased 46 times

scholarly journals A three-site Langmuir adsorption model to elucidate the temperature, pressure, and support dependence of the hydrogen coverage on supported Pt particles

2007 ◽  
Vol 245 (2) ◽  
pp. 415-427 ◽  
Author(s):  
Y JI ◽  
V KOOT ◽  
A VANDEREERDEN ◽  
B WECKHUYSEN ◽  
D KONINGSBERGER ◽  
...  
Keyword(s):  
Adsorption Model ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model

scholarly journals Methylene blue removal using a low-cost activated carbon adsorbent from tobacco stems: kinetic and equilibrium studies

2017 ◽  
Vol 75 (10) ◽  
pp. 2390-2402 ◽  
Author(s):  
Bellington Mudyawabikwa ◽  
Henry H. Mungondori ◽  
Lilian Tichagwa ◽  
David M. Katwire
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Radiation Power ◽  
Low Cost ◽  
Carbon Adsorbent ◽  
Point Of Zero Charge ◽  
Order Kinetic ◽  
Optimum Conditions ◽  
Equilibrium Studies ◽  
Mb Adsorption

The aim of this study was to prepare activated carbon from tobacco stalks using microwave heating. The prepared activated carbon was applied as an adsorbent in methylene blue (MB) removal from water. The optimum conditions for activated carbon preparation were a radiation power of 280 W for a period of 6 minutes after the impregnation of the precursor material with 30% ZnCl2 for 24 hours. The activated carbon yield and iodine number were 49.43% and 1,264.51 mg/g respectively. The activated carbon also had a point of zero charge of 5.81 with an adsorption capacity of 123.45 mg/g for MB. The optimum conditions for MB adsorption were a pH of 6.5 with an adsorbent dosage of 0.2 g/50 mL at 25 °C. The MB adsorption kinetics followed the pseudo second order kinetic model with the intra-particle diffusion model suggesting a two-step adsorption mechanism. The adsorption data also fitted well within the Langmuir adsorption isotherm model. Tobacco stalks can successfully be turned into an economically important product.

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