Comparative study of methylene blue dye adsorption onto activated carbon, graphene oxide, and carbon nanotubes

Li, Yanhui; Du, Qiuju; Liu, Tonghao; Peng, Xianjia; Wang, Junjie; Sun, Jiankun; Wang, Yonghao; Wu, Shao-Ling; Wang, Zonghua; Xia, Yanzhi; Xia, Linhua

doi:10.1016/j.cherd.2012.07.007

Cited by 803 publications

(333 citation statements)

References 42 publications

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“…The as-prepared activated carbon has a mesoporous structure with hydroxyl and carbonyl hydrophilic functional groups, which might be responsible for the adsorption of Naphtol AS-G. The activated carbon spectra is similar to the reported values (Li et al 2013). Effects of initial pH on Naphtol AS-G adsorption onto activated carbon are shown in Figure 3.…”

Section: Resultssupporting

confidence: 76%

Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

Firdaus

Krisnanto²,

Alwi³

et al. 2017

Aceh Int. J. Sci. Technol

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-Synthetic dye wastewater from textile industries is characterized by strong color, high temperature, variable pH and high chemical oxygen demand (COD). The strong color of wastewater affects aesthetic and water transparency of water bodies. One of method that has advantages in term of simplicity to remove synthetic dyes is adsorption. Two different biomaterial wastes of rice straw and palm oil midrib were used in this study to develop activated carbon adsorbents. These adsorbents were applied for the removal of Naphtol AS-G dye in aqueous solution. The effects of solution pH, adsorbents masses and contact time on dye adsorption were evaluated based on batch experiments. Removal of dye can be achieved within 60 minutes at a wide pH range starting from 4 to 8. At lower pH, synthetic dye removal was decreasing probably due to protonation of adsorbent's active sites. The adsorption isotherms based on Langmuir and Freundlich models were analyzed. The isotherms analysis indicated that the adsorption by rice straw and palm oil can be represented by Langmuir and Freundlich isotherm model, respectively. Adsorption isotherms of Naphtol AS-G onto activated carbon are favorable with high adsorption capacity for both biomaterials. The mechanisms of color removal by activated carbon involved chemical and physical adsorption, in accordance with both the Langmuir and Freundlich models. The calculated maximum dye adsorption capacities onto rice straw and palm oil midrib activated carbon were 55.86 and 69.44 mg/g, respectively. Adsorption using biomass-based activated carbon offers a good technique for textile wastewater treatment as it could remove up to 95% of the color intensity besides reducing other pollutants such as COD, nitrate and phosphate.

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Section: Resultssupporting

confidence: 76%

Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

Firdaus

Krisnanto²,

Alwi³

et al. 2017

Aceh Int. J. Sci. Technol

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“…This review described that carbon had the highest adsorption capacity of MB. It has giant frameworks of C-C that caused the high surface area and possibilities to make π-π electron donor-acceptor interaction and electrostatic attraction [24]. However, agricultural solid waste and bioadsorbent material also exhibit the good potential to remove the MB, but not much higher than carbon.…”

Section: Isothermal Adsorptionmentioning

confidence: 99%

Silica Gels from Coal Fly Ash as Methylene Blue Adsorbent: Isotherm and Kinetic Studies

Sulistiyo

Andriana

Piluharto

et al. 2017

Bull. Chem. React. Eng. Catal.

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A lot of dye pollutants were released in the aquatic environment as waste from industrial coloring process. This research aimed to study silica gels (SG) as a potential adsorbent to remove the dyes. The SG can be synthesized from coal fly ash (FA), which is industrial solid waste rarely utilized, using the sol-gel method. Its properties were then characterized by FTIR, XRD, SEM, and isothermal ads-des N2.As a result, FTIR spectra and XRD diffractogram exhibited the successfully SG synthesized from FA with the amorphous structure. The image analysis using SEM demonstrated that SG particles are spherical. The isotherm type, based on isotherm ads-des N2, is type II without hysteresis loop which represents the nonporous material SG with the surface area and pore diameter of 25.977 m 2 /g and 1.52 nm, respectively. The adsorption capacity performance of SG to remove methylene blue (MB) as a basic dye is 62.70 % which is higher than FA, following Langmuir isotherm adsorption model. The kinetics of adsorption rate of SG are based on the pseudo second order models accelerated by 3.37 times faster than FA.

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“…The R 2 of the Langmuir model was close to 1, which suggests that the Langmuir model fitted to the experimental adsorption data better compared to the Freundlich model. As a consequence, the result demonstrates that the adsorption of MB by ACL takes place in a monolayer adsorption manner [9]. …”

Section: Isotherm Model Studiesmentioning

confidence: 86%

Application of Fin System on Adsorption of Methylene Blue Dye using Adsorbent Coating Layer: Mathematical Formulae

Hamid

Ismail

2017

J. Eng. Technol. Sci.

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Abstract. Dye solution treatment using a fin system is a new adsorption treatment technique that can replace expensive conventional adsorption treatment units that are currently mostly used in industry. The fins function as the media for an adsorbent coating and are immersed in a tank containing dye wastewater. By installing the coated fins in the tank, the dye concentration can be easily reduced up to 90%. The purpose of the present study was to develop simple mathematical equations for the fin system using an adsorbent coating layer (ACL). The equilibrium adsorption data fitted to the Langmuir isotherm, indicating that the adsorption surface is homogeneous and in monolayer state. A mathematical formula derived from the isotherm model of adsorption was developed that can be used on large-scale removal of methylene blue dye from industrial wastewater since the error percentage between the calculated and the experimental values was less than 15%.

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Comparative study of methylene blue dye adsorption onto activated carbon, graphene oxide, and carbon nanotubes

Cited by 803 publications

References 42 publications

Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

Silica Gels from Coal Fly Ash as Methylene Blue Adsorbent: Isotherm and Kinetic Studies

Application of Fin System on Adsorption of Methylene Blue Dye using Adsorbent Coating Layer: Mathematical Formulae

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