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Author:

Wang, Yifei (Wang, Yifei.) | Fu, Wanyi (Fu, Wanyi.) | Shen, Yuxiang (Shen, Yuxiang.) | Badireddy, Appala Raju (Badireddy, Appala Raju.) | Zhang, Wen (Zhang, Wen.) | Huang, Haiou (Huang, Haiou.)

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EI Scopus SCIE PubMed

Abstract:

In this study, enhanced dark-field hyperspectral imaging (ED-HSI) was employed to directly observe acetaminophen (AAP), a model pharmaceutical and personal care product (PPCP), adsorbed on multiwalled carbon nanotubes with large diameters (L-MWCNT) and small diameters (S-MWCNT) under equilibrium conditions. The ED-HSI results revealed that (1) AAP molecules primarily adsorbed onto the external surfaces, rather than the internal surfaces of L- and S-MWCNT aggregates, (2) or on sidewall of the dispersed tubes, but not at their end caps. Besides, ED HSI images showed that the surface coverage ratio of AAP/S-MWCNT is smaller than that of AAP/L-MWCNT (1.1 vs 3.4), indicating that there are more available adsorption sites on S-MWCNT than L-MWCNT when the adsorption reached equilibrium. This finding was consistent with the adsorption capacities of S-MWCNT and L-MWCNT (252.7 vs 54.6 mg g(-1)). Direct visualization of sorption sites for PPCP molecules provides new insights into the heterogeneous structures and surface properties of MWCNT and helps elucidate the adsorption mechanisms that are fundamental to the design of functional adsorbents for PPCP contaminants.

Keyword:

Author Community:

  • [ 1 ] [Wang, Yifei]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Yifei]Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, 19,Xinjiekouwai St, Beijing 100875, Peoples R China
  • [ 3 ] [Huang, Haiou]Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, 19,Xinjiekouwai St, Beijing 100875, Peoples R China
  • [ 4 ] [Fu, Wanyi]New Jersey Inst Technol, Dept Civil & Environm Engn, Newark, NJ 07029 USA
  • [ 5 ] [Zhang, Wen]New Jersey Inst Technol, Dept Civil & Environm Engn, Newark, NJ 07029 USA
  • [ 6 ] [Shen, Yuxiang]Univ Vermont, Dept Civil & Environm Engn, Burlington, VT 05405 USA
  • [ 7 ] [Badireddy, Appala Raju]Univ Vermont, Dept Civil & Environm Engn, Burlington, VT 05405 USA

Reprint Author's Address:

  • [Huang, Haiou]Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, 19,Xinjiekouwai St, Beijing 100875, Peoples R China

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Source :

LANGMUIR

ISSN: 0743-7463

Year: 2018

Issue: 44

Volume: 34

Page: 13210-13218

3 . 9 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:192

Cited Count:

WoS CC Cited Count: 9

SCOPUS Cited Count: 9

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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