Adsorption of trihalomethanes from water with carbon nanotubes

Lu, Chungsying; Chung, Yao-Lei; Chang, Kuang‐An

doi:10.1016/j.watres.2004.12.033

Cited by 422 publications

(212 citation statements)

References 12 publications

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“…Since then, carbon nanotubes (CNTs) have attracted tremendous interest globally. They have unique physicochemical as well as electrical properties and have various emerging applications in field emission, hydrogen storage, and chemical sensors (Lu et al, 2005). They not only can adsorb volatile organic compounds (VOC) (Cheng, 2008;Sone et al, 2008) and heavy metal (Li et al, 2003) but also act as a filter (Tsai et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Multi-walled Carbon Nanotubes by Kissinger’s Corrected Kinetic Equation

Hsieh

Chou

Lin

et al. 2010

Aerosol Air Qual. Res.

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Carbon nanotubes (CNTs) have been a popular material in recent years, but their thermal characteristics have not been understood completely. We investigated the unique thermal stability of multi-walled carbon nanotubes (MWCNTs) and used nitric acid (HNO 3 ) to purify MWCNTs to promote its activation energy (E a ). The study used differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), and Fourier transform infrared (FTIR) spectrometer to analyze as-grown MWCNTs and modified MWCNTs. For DSC, the heating rate was chosen to be 0.25 to 2.0 °C/min. From DSC results, E a and exothermic onset temperature (T 0 ) of the modified MWCNTs increased with increasing HNO 3 concentration. The TGA results showed that both as-grown and modified MWCNTs' decomposition temperatures were higher than 500°C in air. The infrared spectra of as-grown MWCNTs and modified MWCNTs have shown that the gas phase composition is CO 2 after TGA linked with FTIR. By Kissinger's corrected kinetic equation, E a increased with increasing HNO 3 concentration. Through this study, we realized that as-grown MWCNTs and modified MWCNTs are thermally hazardous materials with high potential heat of decomposition, especially under fire exposure. Thus, it is important to know the thermal hazard characteristics of material with a measure to prevent its thermal damage during perturbed situations.

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Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Multi-walled Carbon Nanotubes by Kissinger’s Corrected Kinetic Equation

Hsieh

Chou

Lin

et al. 2010

Aerosol Air Qual. Res.

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show abstract

“…CNTs have been considered useful in pollution prevention strategies and are known to have widespread applications as environmental adsorbents and high flux membranes [13], and are also potentially important for in situ environmental remediation due to their unique properties and high reactivity [14]. Investigations dealing with the sorption of organic contaminants, such as dioxin [15], 1,2-dichlorobenzene [16], trihalomethanes [17], PAHs [18] and o-xylene, p-xylene [19] and reactive dyes [20] on CNTs suggest that CNTs may also be suitable candidates for the pre-concentration and solidification of pollutants from large volumes of wastewater. Strong adsorptive interaction between CNTs and polycyclic aromatic hydrocarbons were ascribed to -electron-donor-acceptor (EDA) interactions between aromatic molecules (electron acceptors) and the highly polarizable graphene sheets (electron donors) of CNTs [18,21].…”

Section: Introductionmentioning

confidence: 99%

Adsorption kinetics, isotherms and thermodynamics of atrazine on surface oxidized multiwalled carbon nanotubes

Chen

Shan

Zhou

et al. 2009

Journal of Hazardous Materials

143

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a b s t r a c tThe adsorption kinetics, isotherms and thermodynamic of atrazine on multiwalled carbon nanotubes (MWCNTs) containing 0.85%, 2.16%, and 7.07% oxygen was studied. Kinetic analyses were performed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The regression results showed that the pseudo-second-order law fit the adsorption kinetics. The calculated thermodynamic parameters indicated that adsorption of atrazine on MWCNTs was spontaneous and exothermic. Standard free energy ( G 0 ) became less negative when the oxygen content of MWCNTs increased from 0.85% to 7.07% which is consistent with the low adsorption affinity of MWCNTs for atrazine.

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“…Peng et al [1] found that CNTs are effective for removal of 1,2-dichlorobenzene from water in a wide pH range of 3-10. Lu et al [2] investigated the removal of trihalomethanes by CNTs and found that purified CNTs have higher adsorption capacities for CHCl 3 than activated carbon. The good performance of CNTs for removal of organic pollutants suggests that CNTs may have potential to be used as pollutant removal adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of carbon nanotubes exhausted with dye reactive red 3BS using microwave irradiation

Wang

Peng

Luan

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tCarbon nanotubes (CNTs) exhausted with dye reactive red 3BS were regenerated by microwave irradiation under N 2 atmosphere. High regeneration efficiency was achieved and the regeneration efficiency reached 92.8% after four cycles regeneration. The decrease in adsorption capacity was suggested to be due to the deposition of decomposition residues in CNT pores, which blocked the carbon porosity and decreased the specific surface area.

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Adsorption of trihalomethanes from water with carbon nanotubes

Cited by 422 publications

References 12 publications

Thermal Analysis of Multi-walled Carbon Nanotubes by Kissinger’s Corrected Kinetic Equation

Thermal Analysis of Multi-walled Carbon Nanotubes by Kissinger’s Corrected Kinetic Equation

Adsorption kinetics, isotherms and thermodynamics of atrazine on surface oxidized multiwalled carbon nanotubes

Regeneration of carbon nanotubes exhausted with dye reactive red 3BS using microwave irradiation

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