Influence of Pesticide Properties on Adsorption Capacity and Rate on Activated Carbon from Aqueous Solution

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.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.1883 ◽

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+.

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Mesoporous activated carbon from polyethyleneterephthalate (PET) waste: pollutant adsorption in aqueous solution

New Journal of Chemistry ◽

10.1039/c8nj02715c ◽

2018 ◽

Vol 42 (17) ◽

pp. 14612-14619 ◽

Cited By ~ 6

Author(s):

Cínthia Soares de Castro ◽

Luísa Nagyidai Viau ◽

Júlia Teixeira Andrade ◽

Thais A. Prado Mendonça ◽

Maraísa Gonçalves

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Activated Carbons ◽

Large Molecule ◽

High Adsorption ◽

Pet Waste ◽

Mesoporous Activated Carbon ◽

High Adsorption Capacity

Activated carbons of high mesoporosity were prepared from PET wastes and presented high adsorption capacity, including relatively large-molecule dyes.

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Cd(II) removal on surface-modified activated carbon: equilibrium, kinetics and mechanism

Water Science & Technology ◽

10.2166/wst.2016.338 ◽

2016 ◽

Vol 74 (8) ◽

pp. 1800-1808 ◽

Cited By ~ 6

Author(s):

Jianjun Liang ◽

Meiling Liu ◽

Yufei Zhang

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Orthogonal Experiment ◽

Xrd Analysis ◽

Bet Surface Area ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Modified Activated Carbon ◽

Surface Modified

Commercial pulverous activated carbon (AC-0) was modified through two steps: oxidize AC-0 acid firstly, impregnate it with iron using ferric chloride secondly. Orthogonal experiment was conducted then to prepare modified activated carbon with high Cd(II) adsorption capacity (ACNF). Batch adsorption experiments were undertaken to determine the adsorption characteristics of Cd(II) from aqueous solution onto AC-0 and ACNF and the effect of pH, contact time and initial Cd(II) concentration. The results indicate that: the adsorption behavior of Cd(II) on ACNF can be well fitted with Langmuir model, and the maximum adsorption capacity of ACNF was 2.3 times higher than that of AC-0, supporting a monolayer coverage of Cd(II) on the surface. The kinetics of the adsorption process can be described by pseudo-second-order rate equation very well, and the adsorption capacity increased from 0.810 mg/g to 0.960 mg/g after modification. Compared with AC-0, the kinetic parameters of ACNF showed a higher adsorption rate through the aqueous solution to the solid surface and a lower intraparticle diffusion rate. Surface modification resulted in a lower Brunauer–Emmett–Teller (BET) surface area and pore size because of the collapse and blockage of pores, according to the X-ray diffraction (XRD) analysis, while the total number of surface oxygen acid groups increased, and this was supposed to contribute to the enhanced adsorption capacity of modified activated carbon.

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High adsorption capacity NaOH-activated carbon for dye removal from aqueous solution

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2007.07.109 ◽

2008 ◽

Vol 152 (3) ◽

pp. 1256-1267 ◽

Cited By ~ 136

Author(s):

Feng-Chin Wu ◽

Ru-Ling Tseng

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Dye Removal ◽

High Adsorption ◽

High Adsorption Capacity

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Comparison Study on Adsorption and Removal of Antimony from Acidic Aqueous Solution by Activated Carbons and Machine-Made Charcoal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.779-780.1600 ◽

2013 ◽

Vol 779-780 ◽

pp. 1600-1606 ◽

Cited By ~ 1

Author(s):

Miao Jia ◽

Ji Wei Hu ◽

Jin Luo ◽

Su Ming Duan ◽

Zhi Bin Li ◽

...

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Activated Carbons ◽

Solution Concentration ◽

Adsorptive Capacity ◽

Acidic Aqueous Solution ◽

Constant Rate ◽

Methylene Blue Number ◽

Relationship Of

Adsorption effects of three kinds of activated carbons and a type of machine-made charcoal on the removal of antimony from acidic aqueous solution were investigated and compared. With an initial antimony solution concentration of 1000 μgL-1, the antimony adsorption by selected adsorbents were found to descend in the following order: machine-made charcoal (52.4%) > coconut activated carbon (42.6%) > coal based activated carbon (31.1%) > apricot stone based activated carbon (24.6%). The machine-made charcoal has the best adsorption capacity with a maximum adsorption values of 523.76 μgL-1. Five kinetic models were used for the fitting of the process of antimony adsorption, including Elovich, parabola diffusion, second order, first order and double-constant. Results showed that parabola diffusion and double-constant rate equation were the most suitable models in describing the relationship of antimony adsorption with time in acidic aqueous solution, implying that the adsorption kinetics of the antimony by the selected adsorbents in water might be a surface diffusion. Three adsorptive capacity indicators (iodine number, methylene blue number and phenol number) were determined in this paper. However, machine-made charcoal, which has a relatively high adsorption capacity, is of the lowest levels of the adsorptive capacity indicators. Thus, some complex mechanisms might be involved for the antimony adsorption by the machine-made charcoal, consequently considering the mechanism for the adsorption of antimony by the charcoal has not been verified, a further study still needs to be done.

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Adsorption of leather dye onto activated carbon prepared from bottle gourd: equilibrium, kinetic and mechanism studies

Water Science & Technology ◽

10.2166/wst.2012.555 ◽

2013 ◽

Vol 67 (1) ◽

pp. 201-209 ◽

Cited By ~ 22

Author(s):

Edson Luiz Foletto ◽

Caroline Trevisan Weber ◽

Diego Silva Paz ◽

Marcio Antonio Mazutti ◽

Lucas Meili ◽

...

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Intraparticle Diffusion ◽

Second Order ◽

Adsorption Kinetic ◽

Bottle Gourd ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Equilibrium Data

Activated carbon prepared from bottle gourd has been used as adsorbent for removal of leather dye (Direct Black 38) from aqueous solution. The activated carbon obtained showed a mesoporous texture, with surface area of 556.16 m2 g−1, and a surface free of organic functional groups. The initial dye concentration, contact time and pH significantly influenced the adsorption capacity. In the acid region (pH 2.5) the adsorption of dye was more favorable. The adsorption equilibrium was attained after 60 min. Equilibrium data were analyzed by the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin isotherm models. The equilibrium data were best described by the Langmuir isotherm, with maximum adsorption capacity of 94.9 mg g−1. Adsorption kinetic data were fitted using the pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion models. The adsorption kinetic was best described by the second-order kinetic equation. The adsorption process was controlled by both external mass transfer and intraparticle diffusion. Activated carbon prepared from bottle gourd was shown to be a promising material for adsorption of Direct Black 38 from aqueous solution.

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Adsorption of Crude Oil Spill from Aqueous Solution using Agro-Wastes as Adsorbents

Journal of Scientific Research and Reports ◽

10.9734/jsrr/2021/v27i430376 ◽

2021 ◽

pp. 27-52

Author(s):

Akinsete O. Oluwatoyin ◽

Araoye A. Olalekan

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Capacity ◽

Carbon Adsorbents ◽

Banana Peel ◽

Rice Husks ◽

Order Model ◽

First Order ◽

Pseudo Second Order ◽

Crude Oil Spill

Ever increasing and growing awareness of oil-spillage to water environment has led to the search for cost-effective unconventional remediating techniques. This study was carried out using agro-wastes (Rice Husks, Banana Peels and Groundnut Husks) adsorbents. They were activated with H3PO4 for crude oil spill removal from aqueous solution; results were analysed using atomic absorption spectroscopy. The raw agro-wastes and their activated forms were characterized by SEM. The sorption study for maximum adsorption capacity were carried out at different adsorbent concentrations, adsorbent dosage, contact time, pH and rotational speed. The experimental results were analysed using Langmuir, Freundlich, Temkin, Dubinin-Radushkevich isotherm models. The maximum average adsorption capacity (qe) for raw and activated carbon adsorbents were observed in rice husks with 0.2750 and 0.3698 mg/g respectively. The Langmuir isotherm was found to well represent the measured sorption data for the raw and activated banana peel while the remaining raw and activated adsorbents followed the Temkin isotherm. The batch adsorption data on the effect of contact time were fitted into the pseudo-first-order and pseudo-second order models. The banana peel data and its activated form were best described by the pseudo-second-order model indicating chemisorption process while the remaining adsorbents followed the pseudo-first-order model indicating physisorption process. The average removal efficiency of oil by the various adsorbents used increase in the order: (Raw: Banana Peels (50.4 %) < Groundnut Husks (56.8 %) < Rice Husks (74.4 %); Activated Carbon: Banana Peels (61.4 %) < Groundnut Husks (65.6 %) < Rice Husks (82.8 %)). Results of this study (high values of R2 and least values AARE and RMSE) revealed and confirmed that activated carbon adsorbents have better adsorption capacity than the raw forms to clean-up oil spills in aqueous solution.

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