Enhancement effect in the piezoelectric degradation of organic pollutants by piezo‐Fenton process. Issue 1 (7th April 2016)

• Record Type: Journal Article
• Authors: Lv, Wei; Kong, Lingjun; Lan, Shenyu; Feng, Jinxi; Xiong, Ya; Tian, Shuanghong
• Is Part Of: Journal of chemical technology & biotechnology. Volume 92:Issue 1(2017)
• Page Start: 152
• Page End: 156
• Publication Date: 2016-04-07
• Subjects: BaTiO3 -- piezoelectric effect -- piezo‐Fenton -- H2O2; Biotechnology -- Periodicals; Chemistry, Technical -- Periodicals; Chemical engineering -- Periodicals; Industries -- Environmental aspects -- Periodicals; 660
• DOI: 10.1002/jctb.4981
• Languages: English
• ISSNs: 0268-2575

Abstract

Abstract: BACKGROUND: Discovery of the nanometer material‐mediated piezoelectric effect has aroused interest in research into harnessing low‐frequency vibration energy, because a little vibration energy, even muscle‐movement, can generate electrical energy. Recently, much attention has focused on developing new processes of pollutant degradation using in situ application of piezo‐generated electrical energy. RESULTS: It was found that the piezoelectric degradation of AO7 could be enhanced by adding ferrous ions. For example, 24.3%, 16.9% and 7.8% degradation of AO7, phenol and 4‐chlorophenol, respectively, was observed in a 30 min piezo‐process. Meanwhile, it was also found that H2 O2 was generated in situ during the piezoelectric process. The maximum concentration of H2 O2 reached 5.3 µmol L −1 . It was identified that the enhancement effect of ferrous ions originated from a H2 O2 ‐related Fenton reaction. CONCLUSION: The finding of in situ piezo‐generated H2 O2 and the piezo‐Fenton effect led to better understanding of the BaTiO3 ‐mediated piezo‐degradation of organic pollutants. It provides a new clue to developing an efficient piezo‐process for the degradation of organic pollutants, although the mechanism of piezo‐generating H2 O2 is still under investigation. © 2016 Society of Chemical Industry