Assembly structure control of single wall carbon nanotubes with liquid phase naphthalene adsorption

Gotovac, Suzana; Song, Lei; Kanoh, Hirofumi; Kaneko, Katsumi

doi:10.1016/j.colsurfa.2006.10.035

Cited by 54 publications

(28 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 as a function of n and -Z. Increasing n within each -Z group of compounds resulted in the increase in the log K ow , which is consistent with the increase in the removal efficiency of the individual NAs by n. This confirms the higher tendency of NAs with the higher number of the carbons to adsorb onto the surface of the adsorbents (Gotovac et al 2007). …”

Section: Adsorption Isothermssupporting

confidence: 74%

See 1 more Smart Citation

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Petroleum coke (PC) is a waste by-product generated during the oil upgrading processes by the petroleum industry. The continuing accumulation of large quantities of PC requires the development of innovative strategies for the effective utilization of this carbon-rich material. In this study, PC was used for the removal of naphthenic acids (NAs) and acid-extractable fraction (AEF) from oil sands process-affected water (OSPW), generated during the oil refining process. A systematic study on the adsorption of organic fractions, vanadium leaching from PC, adsorption mechanisms, and the effect of physico-chemical characteristics of the PC on adsorption process was performed. Physico-chemical properties of PC were determined by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy, and Brunauer-Emmett-Teller surface area analysis. AEF and NAs removals of 60 and 75 %, respectively, were achieved at PC dose of 200 g/L after 16 h of contact. FT-IR and TGA analysis of PC suggested the physisorption of organic compounds onto the surface of PC. The calculated mean free energy of adsorption (E \ 8 kJ/mol) also indicated the physisorption of organics to the PC surface. The hydrophobic interactions between the NAs and the PC were suggested as the dominant adsorption mechanisms. The vanadium release occurred when PC was mixed with OSPW and vanadium concentration increased with an increase in the PC dose. Speciation analysis indicated that the vanadium leached was predominantly vanadium (V) and insignificant amount of vanadium (IV) was also detected.

show abstract

Section: Adsorption Isothermssupporting

confidence: 74%

“…This observation suggests physisorption of organic compounds on the surface of adsorbents (Gotovac et al 2007;Leng and Pinto 1997;Njoku and Hameed 2011).…”

Section: Identification Of Surface Functional Groups By Ft-irmentioning

confidence: 69%

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Generally, amorphous carbon and catalyst particles are also present on the surface of the as grown CNTs, which can significantly decrease the adsorption and desorption efficiency of the CNTs by blocking their pores [24]. The removal of amorphous carbon is usually achieved by heating the CNTs at 300-500ºC and the catalyst particles can be eliminated by acid treatment [25].…”

Section: Introductionmentioning

confidence: 99%

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Amade

Hussain²,

Romero‐Ocaña³

et al. 2014

J Environ Eng Ecol Sci

View full text Add to dashboard Cite

Background: Air pollution has become an important issue worldwide due to its adverse health effects. Among the different air contaminants, volatile organic compounds (VOCs) are liquids or solids with a high vapor pressure at room temperature that are extremely dangerous for human health. Removal of these compounds can be achieved using nanomaterials with tailored properties such as carbon nanotubes. Methods: Vertically-aligned multiwall carbon nanotubes (CNTs) were successfully grown on quartz filters by means of plasma enhanced chemical vapor deposition (PECVD). Furthermore, a plasma treatment was performed in order to modify the surface properties of the CNTs. The adsorption/desorption processes of three chlorinated compounds (trichloroethylene, 1,2-dichlorobenzene and chloroform) on the CNTs were studied using mass spectrometry measurements with a residual gas analyzer. Results: The adsorption capability of the CNTs increased after functionalization of their surface with a water plasma treatment. In addition, it was found that the presence of aromatic rings, water solubility and polarity of the VOCs play an important role on the adsorption/desorption kinetics at the CNTs surface. Conclusions: This study demonstrates the applicability of CNTs deposited on quartz filters for the removal or selective detection of volatile organic compounds (VOCs). The presence of aromatic rings in VOCs results in π-stacking interactions with a significant increase of their adsorption. On the other hand, it was found that CNTs surface interactions increase with water solubility and polarity of the VOC.

show abstract

“…Functional groups like -OH, -COOH, and -C=O of CNPs can be intentionally added by oxidation methods (Gotovac et al, 2007b). In addition, CNTs discharged into the environment may be oxidized in natural processes.…”

Section: Surface Propertiesmentioning

confidence: 99%

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Peng

Zhang

et al. 2014

J. Zhejiang Univ. Sci. A

View full text Add to dashboard Cite

Carbon nanoparticles (CNPs) are novel manufactured materials with unique properties and have potential for a variety of applications. Adsorption of organic contaminants by discharged CNPs may affect the fate and transport of organic contaminants in the environment. This review summarizes the present research progress regarding organic contaminant adsorption on CNPs, and provides important information for the evaluation of the environmental behavior of organic contaminants and the risks associated with the use of CNPs. The main adsorption mechanisms involve hydrophobic interactions, π-π interactions, hydrogen bonds, and electrostatic interactions. These interactions may exist simultaneously, while the controlling adsorption mechanism differs depending on the properties of both the organic contaminants and the CNPs along with environmental conditions. The status of CNPs in the environment greatly affects or even controls their characteristics for adsorption of organic contaminants. The mobility and transport of dispersed CNPs and CNP-adsorbed organic contaminants could be promoted in natural aqueous environments, potentially increasing the spread of various organic contaminants and their associated environmental risks. Investigating the adsorption mechanisms and impact parameters is vital in predicting the environmental behaviors of both organic contaminants and CNPs and their associated risks.

show abstract

Assembly structure control of single wall carbon nanotubes with liquid phase naphthalene adsorption

Cited by 54 publications

References 18 publications

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Contact Info

Product

Resources

About