title: Effect of nitrogen doping on titanium carbonitride-derived adsorbents used for arsenic removal.
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.
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jisun
authors.initials: J
authors.lastname: Han
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Soonjae
authors.initials: S
authors.lastname: Lee
authors.affiliation: Computational Science Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Keunsu
authors.initials: K
authors.lastname: Choi
authors.affiliation: Samsung Electronics Co.Ltd.,(Maetan dong) 129, Samsung-ro Yeongtong-gu, Suwonsi, Gyeonggi-do 443-742, Repubilc of Korea.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Daegwon
authors.initials: D
authors.lastname: Ha
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Chang-Gu
authors.initials: CG
authors.lastname: Lee
authors.affiliation: Department of Civil Engineering, Sangmyung University, Cheonan, Chungnam 31066, Republic of Korea.
authors.forename: Byungryul
authors.initials: B
authors.lastname: An
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Sang-Hyup
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Computational Science Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea. Electronic address: mizuseki@kist.re.kr.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mizuseki
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Department of Energy and Environmental Engineering, University of Science and Technology (UST), Daejeon 305-350, Republic of Korea. Electronic address: plead36@kist.re.kr.
authors.forename: Jae-Woo
authors.initials: JW
authors.lastname: Choi
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea. Electronic address: shinkang@snu.ac.kr.
authors.forename: Shinhoo
authors.initials: S
authors.lastname: Kang
keywords: Arsenic removal; Chlorination; First-principles calculation; Micro-pores; Nitrogen doping