Acid modified carbon coated monolith for methyl orange adsorption

Cheah, Willie; Hosseini, Soraya; Khan, Moonis Ali; Chuah, T. G.; Choong, Thomas Shean Yaw

doi:10.1016/j.cej.2012.07.004

Cited by 127 publications

(52 citation statements)

References 39 publications

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“…As expected, after oxidation, a significant increase in the concentration of the oxygenated surface groups was observed [37]. The nitric acid oxidation generates both the increase of low-temperature, hydroxyl and carboxylic groups, and the high-temperature, phenolic, carbonyl, anhydride and quinonic surface groups.…”

Section: Chemical Surface Composition Of Activated Carbonsmentioning

confidence: 49%

Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Torrellas

Lovera

Escalona

et al. 2015

Chemical Engineering Journal

197

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Section: Chemical Surface Composition Of Activated Carbonsmentioning

confidence: 49%

Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Torrellas

Lovera

Escalona

et al. 2015

Chemical Engineering Journal

197

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“…The MO molecule was present in the solution as quinone and azo structures (pK a ¼ 3.47, Scheme 2), depending on the solution pH. 24 It is predicted that the azo structure should have a more conjugated p system 25 than its quinone counterpart. Indeed, the adsorption capacity for MO under basic conditions was found to be higher than that under acidic conditions, predicting the role of p-p stacking interactions in the dye adsorption on TPP-NH 2 .…”

Section: Effect Of Ph On the Adsorption Of Meb And Mo On Tpp-nhmentioning

confidence: 99%

Amine functionalized 3D porous organic polymer as an effective adsorbent for removing organic dyes and solvents

et al. 2017

RSC Adv.

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Organic dyes and solvents are emerging pollutants; the development of new materials for their efficient adsorption and removal is thus of great significance. In this work, we report the application of an amine functionalized triptycene-based 3D polymer (TPP-NH 2 ) as a novel adsorbent for the fast removal of organic dyes in aqueous solution and organic solvents with a view to understanding its adsorption kinetics, adsorption isotherms, desorption and adsorbent regeneration. The adsorption of organic dyes (cationic methylene blue, MEB, and anionic methyl orange, MO) on TPP-NH 2 was fast, and most of the dyes were adsorbed in 60 min. The adsorption of MEB and MO follows pseudo-second-order kinetics and fits the Langmuir model, where the maximum adsorption capacity increased from 204.9 mg g À1 to 560.6 mg g À1 and 213.2 mg g À1 to 803.2 mg g À1 for MEB and MO, respectively, as the temperature increased, suggesting that the adsorption of MEB and MO on TPP-NH 2 is favorable at high temperatures via an endothermic process. The pH has no obvious effect on the adsorption of MEB and MO. The used TPP-NH 2 could be regenerated effectively and recycled at least five times without a significant loss of adsorption capacity. In addition, the TPP-NH 2 can adsorb up to 33 times its own weight in organic solvents while wiping off the water. The high surface area, hierarchical porosity and p-p stacking interactions between the aromatic rings of MEB and MO and the aromatic rings of 3D TPP-NH 2 were responsible for the efficient adsorption. Therefore, the TPP-NH 2 that was synthesized using the facile strategy possesses significant potential in the treatment of wastewater.

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“…Other than activated carbon, the other adsorbents have some undesirable disadvantages in dye removal such as complex separation techniques from the adsorbate, little or no resistance against acid solutions, and poor mechanical strength and versatility. Additionally, these adsorbents need a long contact time with the adsorbate [18][19][20][21][22]. Therefore, with a high specific surface area, large pore volume, suitable pore size (2-50 nm), high degree of surface reactivity and effective adsorption quality, activated carbon has become the most desirable adsorbent [23][24][25][26].…”

Section: Ftir Analysismentioning

confidence: 99%

Adsorption capability of activated carbon synthesized from coconut shell

Islam¹,

Ang²,

Gharehkhani³

et al. 2016

Carbon letters

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Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m 2 /g with a pore volume of 1.032 cm 3 /g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The field emission scanning electron microscopy image showed the presence of well-developed pores on the surface of the activated carbon. The presence of important functional groups was shown by the Fourier transform infrared spectroscopy spectrum. The adsorption of methyl orange onto the activated carbon reached 100% after 12 min. Kinetic analysis indicated that the adsorption of methyl orange solution by the activated carbon followed a pseudo-second-order kinetic mechanism (R 2 > 0.995). Therefore, the results show that the produced activated carbon can be used as a proper adsorbent for dye containing effluents.

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Acid modified carbon coated monolith for methyl orange adsorption

Cited by 127 publications

References 39 publications

Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Amine functionalized 3D porous organic polymer as an effective adsorbent for removing organic dyes and solvents

Adsorption capability of activated carbon synthesized from coconut shell

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