Effect of nitrogen doping on titanium carbonitride-derived adsorbents used for arsenic removal

Jisun Han, Soonjae Lee, Keunsu Choi, Jinhong Kim, Daegwon Ha, Chang Gu Lee, Byungryul An, Sang Hyup Lee, Hiroshi Mizuseki, Jae Woo Choi, Shinhoo Kang

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Arsenic in water and wastewater is considered to be a critical contaminant as it poses harmful health risks. In this regard, to meet the stringent regulation of arsenic in aqueous solutions, nitrogen doped carbon-based materials (CN) were prepared as adsorbents and tested for the removal of arsenic ion from aqueous solutions. Nitrogen-doped carbon (CNs) synthesized by chlorination exhibited well-developed micro- and small meso-pores with uniform pore structures. The structure and characteristics of the adsorbents thus developed were confirmed by field-emission scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. Among the CNs developed, CN700 exhibited high adsorption capacity for arsenic (31.08 mg/g). The adsorption efficiency for arsenic ion was confirmed to be affected by pyrrolic nitrogen and micro-pores. These results suggest that CNs are useful adsorbents for the treatment of arsenic, and in particular, CN700 demonstrates potential for application as an adsorbent for the removal of anionic heavy metals from wastewater and sewage.

Original languageEnglish
Pages (from-to)375-385
Number of pages11
JournalJournal of hazardous materials
Volume302
DOIs
Publication statusPublished - 2016 Jan 25

Bibliographical note

Funding Information:
This study was supported by the Nano-Convergence Foundation ( www.nanotech2020.org ) funded by the Ministry of Science, ICT and Future Planning (Korea) & the Ministry of Trade, Industry and Energy (Korea) [Project Number: R201400210] and the Korea Institute of Science and Technology (KIST) institutional program (2E25311). In addition, we are grateful for the financial support from KIST (Grant No. 2E24630 ). This study was also partially supported by the inter-university cooperative research program of the Center for Computational Materials Science, Institute for Materials Research, Tohoku University (Proposal No. 15S0002), and by Hanwha Chemical, Korea, as well as by BK PLUS, through the Korean Ministry of Education, Science and Technology. We also acknowledge the Research Institute of Advanced Materials, Seoul National University for the use of facilities.

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

  • Arsenic removal
  • Chlorination
  • First-principles calculation
  • Micro-pores
  • Nitrogen doping

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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