title: Microwave-induced carbon nanotubes catalytic degradation of organic pollutants in aqueous solution.
abstract: In this study, a new catalytic degradation technology using microwave induced carbon nanotubes (MW/CNTs) was proposed and applied in the treatment of organic pollutants in aqueous solution. The catalytic activity of three CNTs of 10-20nm, 20-40nm, and 40-60nm diameters were compared. The results showed that organic pollutants such as methyl orange (MO), methyl parathion (MP), sodium dodecyl benzene sulfonate (SDBS), bisphenol A (BPA), and methylene blue (MB) in aqueous solution could be degraded effectively and rapidly in MW/CNTs system. CNTs with diameter of 10-20nm exhibited the highest catalytic activity of the three CNTs under MW irradiation. Further, complete degradation was obtained using 10-20nm CNTs within 7.0min irradiation when 25mL MO solution (25mg/L), 1.2g/L catalyst dose, 450W, 2450MHz, and pH=6.0 were applied. The rate constants (k) for the degradation of SDBS, MB, MP, MO and BPA using 10-20nm CNTs/MW system were 0.726, 0.679, 0.463, 0.334 and 0.168min(-1), respectively. Therefore, this technology may have potential application for the treatment of targeted organic pollutants in wastewaters.
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Xue
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Youtao
authors.initials: Y
authors.lastname: Song
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Manli
authors.initials: M
authors.lastname: Shen
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China. Electronic address: lnuhjhx@163.com.
authors.forename: Zhaohong
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Tianxin
authors.initials: T
authors.lastname: Yuan
authors.affiliation: School of Environment Science, Liaoning University, Shenyang 110036, China.
authors.forename: Fangyuan
authors.initials: F
authors.lastname: Tian
authors.affiliation: Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012, USA. Electronic address: dionysios.d.dionysiou@uc.edu.
authors.forename: Dionysios D
authors.initials: DD
authors.lastname: Dionysiou
keywords: Advanced oxidation; Carbon nanotube; Degradation; Microwave; Organic pollutant