Photooxidation of p-arsanilic acid in aqueous solution by UV/persulfate process

Xiangyi Shen, Jing Xu, Ivan P. Pozdnyakov, Zizheng Liu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Used as a kind of feed additive, p-arsanilic acid can pose a potential risk to organisms when abandoned in the environment. The photodegradation of p-ASA was investigated under UV-C irradiation in the presence of persulfate (PS) in this work. The addition of PS facilitated the decomposition of p-ASA and notably, the presence of 50 mmol PS brought about a nearly complete mineralization after 3 h, while an insignificant total organic carbon (TOC) removal was observed under UV irradiation (λ = 254 nm) only. Experimental results proved that sulfate radical (SO4-) was responsible for the promotion effect. The cleavage of As-C bond released inorganic arsenic and caused the occurrence of various organic products, for example, hydroxybenzaldehyde, nitrobenzene, benzenediol sulfate, and biphenylarsinic acid. The application of PS with UV-C light may throw a light on thorough treatment for p-ASA containing wastewater.

Original languageEnglish
Article number615
Number of pages7
JournalApplied Sciences (Switzerland)
Volume8
Issue number4
DOIs
Publication statusPublished - 13 Apr 2018

Keywords

  • P-arsanilic acid
  • Photodegradation
  • Sulfate radical
  • UV/persulfate system
  • photodegradation
  • p-arsanilic acid
  • HETEROGENEOUS CATALYSIS
  • MASS-SPECTROMETRY
  • ADVANCED OXIDATION PROCESSES
  • POULTRY LITTER
  • KINETICS
  • PHOTODEGRADATION
  • DEGRADATION
  • BISPHENOL-A
  • sulfate radical
  • ACTIVATED PERSULFATE
  • WATER

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