Adsorption of 2,4,6-trichlorophenol by multi-walled carbon nanotubes as affected by Cu(II)

Chen, Guangcai; Shan, Xiao-quan; Wang, Yusheng; Wen, Bin; Pei, Zhiguo; Xie, Yaning; Liu, Tao; Pignatello, Joseph J.

doi:10.1016/j.watres.2009.03.002

Cited by 133 publications

(57 citation statements)

References 44 publications

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“…, the adsorption capacity of MMC to TCP was 210 and 587 mg g À1 , respectively, which were much higher than those obtained on other carbon-based materials reported in literature [43,40,[48][49][50]. For activated carbon, the largest surface area is made up of micro pores (with a radius of less than 1 nm), and the micro pores are easily clogged up in aqueous solution, which makes the adsorptive sites unavailable to adsorbates.…”

mentioning

confidence: 63%

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Liu

Niu

et al. 2014

Microporous and Mesoporous Materials

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a b s t r a c tWe present here a novel, low cost and environmental-friendly synthetic strategy for fabricating flowerlike magnetic mesoporous carbon (MMC) microspheres by using silica coated ), as well as good chemical inertness and mechanical stability. The MMC spheres were used to adsorb 2,4,6-trichlorophenol (TCP) from simulated water samples. Experiment results suggest that the adsorption was favorable at acidic pH and increased with the rise of initial TCP concentration and temperature. Kinetic parameters were proved to follow the pseudo-second-order kinetics model and the equilibrium data was more favorable for Freundlich isotherm. The equilibrium absorption capacity was 210 mg g À1 at initial TCP concentration of 20 mg L À1and increased to 587 mg g À1 when the initial TCP concentration was up to 100 mg L À1, which was much higher than those of other carbon-based adsorbents reported in literature. To the best of our knowledge, this is the first report on the synthesis of flowerlike MMC material by using LDH as template and its application as adsorbent to remove TCP.

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confidence: 63%

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Liu

Niu

et al. 2014

Microporous and Mesoporous Materials

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“…Previous studies suggested that metal cations may influence the environmental fate of toxic chemicals in soil-water systems [32,33]. Our primary study showed that metallic cations may influence the adsorption of atrazine and 2,4,6-trichlorophenol onto CNTs [28,34], implying that organic chemicals exhibit different environmental behaviors in multiple contaminant system from that in singlesolute systems.…”

Section: Introductionmentioning

confidence: 70%

Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead

Chen

Shan

Pei

et al. 2011

Journal of Hazardous Materials

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a b s t r a c tThe effect of lead on the adsorption of diuron and dichlobenil on multiwalled carbon nanotubes (MWCNTs) was investigated to explore the possible application of MWCNTs for removal of both herbicides from contaminated water. The adsorption of diuron and dichlobenil on MWCNTs at pH 6 was nonlinear and fit the Polanyi-Manes model well. The adsorption of diuron and dichlobenil was closely correlated with specific surface areas and micropore volumes of MWCNTs. An increase in oxygen content of MWCNTs with same diameters and similar surface areas decreased the adsorption of diuron and dichlobenil, while increased the adsorption of lead. Micro-Fourier transform infrared spectroscopic study indicated that hydrogen bonding is a main mechanism responsible for the adsorption of diuron or dichlobenil onto MWCNTs-O. Oxygen containing groups, mainly carboxylic groups, significantly increased the adsorption of lead through the formations of outer-sphere and inner-sphere complexes, which are verified by X-ray absorption spectroscopic measurements. Oxygen containing groups and the presence of lead diminished the adsorption of diuron and dichlobenil. The suppression mechanisms of lead were ascribed to hydration and complexation of lead with carboxylic groups, which may occupy part of surface of MWCNTs-O. The large hydration shell of lead cations may intrude or shield hydrophobic and hydrophilic sites, resulting in a decreased adsorption of diuron and dichlobenil at the lead-complexed moieties.

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“…et al, 2008;Chen et al, 2009). In other studies, the adsorption of diuron and dichlobenil on CNTs was inhibited by Pb 2+ because a large hydration shell of Pb 2+ formed on the CNT surface .…”

Section: +mentioning

confidence: 92%

“…Among these interactions, hydrophobic interaction has been used to interpret the sorption of hydrophobic organic contaminants (HOCs) by CNPs, because the surfaces of CNPs are hydrophobic (Gotovac et al, 2006;2007c;Yang et al, 2006). Electrostatic interaction may be the dominant interaction for the adsorption of charged organic contaminants on CNPs (MacKay and Vasudevan, 2012), such as the adsorption of fluoroquinolone antibiotics (OFL and NOR) on CNTs, as affected by pH (Wang et al, 2009;Peng et al, 2012b). Hydrogen bonds can form between CNPs and organic contaminants if both chemicals and CNPs have certain functional groups, such as -OH, -COOH, -F, and -NH 2 (Vermisoglou et al, 2007;van Wieren et al, 2012).…”

Section: Mechanisms Of Interaction Between Contaminants and Carbon Namentioning

confidence: 99%

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Peng

Zhang

et al. 2014

J. Zhejiang Univ. Sci. A

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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.

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Adsorption of 2,4,6-trichlorophenol by multi-walled carbon nanotubes as affected by Cu(II)

Cited by 133 publications

References 44 publications

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

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