Homogeneous activation of peroxymonosulfate using a low-dosage cross-bridged cyclam manganese(II) complex for organic pollutant degradation via a nonradical pathway

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Yuqing Yu
  • Peng Tan
  • Xinjue Huang
  • Junjie Tao
  • Yingying Liu
  • And 3 others
  • Raymond Jianxiong Zeng
  • Man Chen
  • Shungui Zhou

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number122560
Journal / PublicationJournal of Hazardous Materials
Volume394
Online published19 Mar 2020
Publication statusPublished - 15 Jul 2020

Abstract

The high dosage of catalyst requirement and weak anti-interference ability limit current heterogeneous manganese (Mn) catalyst/peroxymonosulfate (PMS) systems to remediate the organic polluted wastewater in complicated environment. Inspired by the concept of atom economy, herein, a homogenous manganese complex bearing a cross-bridged cyclam ligand Mn(cbc)Cl2 (MnL, L = cbc = 4,11-dimethyl-1,4,8,11-tetraazabicyclo[6.6.2]hexadecane)) is capable of activating PMS for reactive brilliant red K-2BP (RBR K-2BP) degradation. The dosage of MnL for PMS activation was low, in a range of 0.38∼3.8 mg/L. The quenching experiments demonstrated that the degradation was a nonradical-controlled process. Using methyl phenyl sulfoxide (PMSO) as a probe, the dominated degradation process of substrate was via an oxygen transfer pathway. Moreover, a high-valent Mn-oxo [(O)MnVLCl2]+ was directly detected using electrospray ionization mass spectrometry (ESI/MS). This system showed excellent anti-interference ability to both anions and humic acid, a typical natural organic matter. The atom economy, represented by an index ((mg pollutant)/h/(g catalyst)), showed that MnL 22737 in PMS activation was much higher than those of Mn-based heterogeneous catalytic systems 67∼960 and was only behind that of iron-tetraamidomacrocyclic ligand Fe-TAML 59139. This work provides insights into designing an atom-economic Mn-based PMS activator for efficient treatments for organic pollutants in a complicated environment.

Research Area(s)

  • Atom economy, Homogeneous catalyst, Manganese-cyclam complex, Nonradical pathway, Peroxymonosulfate activation

Citation Format(s)

Homogeneous activation of peroxymonosulfate using a low-dosage cross-bridged cyclam manganese(II) complex for organic pollutant degradation via a nonradical pathway. / Yu, Yuqing; Tan, Peng; Huang, Xinjue; Tao, Junjie; Liu, Yingying; Zeng, Raymond Jianxiong; Chen, Man; Zhou, Shungui.

In: Journal of Hazardous Materials, Vol. 394, 122560, 15.07.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal