Lead adsorption on carbon nanotubes

Li, Yanhui; Wang, Shuguang; Wei, Jinquan; Zhang, Xianfeng; Xu, Chao; Zhang, Luan; Wu, Dehai; Wei, Bingqing

doi:10.1016/s0009-2614(02)00502-x

Cited by 652 publications

(288 citation statements)

References 11 publications

(12 reference statements)

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“…Li et al [5] found that acid-refluxed CNTs can be good Pb 2þ adsorbents and have great potential applications in environmental protection. They also prepared amorphous Al 2 O 3 supported on carbon nanotubes (Al 2 O 3 /CNTs) and found that it has a much higher adsorption capacity of fluoride than c-Al 2 O 3 and predicted that it is very suitable for potential applications in fluoride removal from water [6].…”

Section: First Reported In 2001 Thatmentioning

confidence: 99%

Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes

Peng¹,

Li²,

Luan³

et al. 2003

Chemical Physics Letters

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504

270

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The as-grown CNTs and graphitized CNTs were used as adsorbents to remove 1,2-dichlorobenzene from water. The experiments demonstrate that it takes only 40 min for CNTs to attain equilibrium and the adsorption capacity of asgrown and graphitized CNTs is 30.8 and 28.7 mg/g, respectively, from a 20 mg/l solution. CNTs can be used as adsorbents in a wide pH range of 3-10. Thermodynamic calculations indicate that the adsorption reaction is spontaneous with a high affinity and the adsorption is an endothermic reaction.

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Section: First Reported In 2001 Thatmentioning

confidence: 99%

Adsorption of 1,2-dichlorobenzene from water to carbon nanotubes

Peng¹,

Li²,

Luan³

et al. 2003

Chemical Physics Letters

Self Cite

504

270

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“…1 SEM of multi-walled carbon nanotube-functionalized carboxyl the 1634 cm -1 area was related to the amide group (CO-NH) which is a stretching bond. The peak at 2550 cm -1 was related to thiol functional groups(SH) and the peak at 1350 was related to the bond that occurred by bending cysteamine [8]. The thermal behavior of multi-walled carbon nanotubefunctionalized carboxyl MWCNT-COOH and nanocomposite MWCNT-SH was studied by TGA at 600 c by the SDTQ device, as shown in Figs.…”

Section: Ftir Spectramentioning

confidence: 99%

Raman spectroscopy and TGA studies for the synthesis of multi-walled carbon nanotube-functionalized thiol (MWCNT-SH) nanocomposites: study of effect of concentration

2015

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We have investigated some methods such as Raman spectroscopy and thermogravimetric analysis (TGA) studies for the nanocomposites multi-walled carbon nanotube-functionalized thiol (MWCNT-SH) by adding to cysteamine with known concentration in nanocomposite. For this study, we synthesized nanocomposite MWCNT-SH by the reaction between multi-walled carbon nanotubes-functionalized carboxyl and the cysteamine. For study of the effect of concentration, cysteamine with different concentrations was used (1, 3 and 5 % weight) and it was called MWCNT-SH1, MWCNT-SH3 and MWCNT-SH5, respectively. Then, the nanocomposite provided was characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The surface structure of nanocomposites can be analyzed and confirmed using Raman and FT-IR spectroscopy. Also, to investigate the thermal stability TGA was used. The study of TGA showed that nanocomposite MWCNT-SH had low thermal stability at temperatures more than 100°C.

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“…CNTs were found to be superior sorbents for inorganic pollutants such as fluoride [18], and several divalent metal ions [7,8,[19][20][21][22][23][24][25]. Li et al [24] reported that CNTs with more defects and poor quality possess higher surface area and exhibit better lead sorption capacity compared to aligned CNTs.…”

Section: Introductionmentioning

confidence: 99%

“…Maximum sorption capacity for heavy metals determined based on Langmuir model varies based on the type of metal. The maximum sorption capacity for cadmium, lead, nickel and zinc is reported to be in the range of 10-11 mg/g [21], 49-97 mg/g [20,22,24], 9-47 mg/g [19,25] and 11-43 mg/g [7,8], respectively. Hence, with CNTs as sorbent, metal ion uptake followed the order Pb 2+ > Ni 2+ > Zn 2+ > Cd 2+ .…”

Section: Introductionmentioning

confidence: 99%