Effects of organic acids and initial solution pH on photocatalytic degradation of bisphenol A (BPA) in a photo-Fenton-like process using goethite (α-FeOOH)

Document Type

Article

Publication Date

1-1-2016

Abstract

This work investigated the effects of organic acids and initial solution pH on the photodegradation of BPA in a photo-Fenton-like process using α-FeOOH as a catalyst. The results showed that the addition of different organic acids affected the formation of the ferric-carboxylate complexes and free radicals, which in turn varied the photodegradation efficacy. Compared with the other acids, oxalic acid (OA) was found to be the most effective in enhancing the photodegradation of BPA, which strongly depends on the OA concentration. Particularly, the addition of OA could significantly extend the working pH from an acidic to a neutral range for the photocatalytic process and thus the acidification pretreatment may not be needed. A high photocatalytic degradation of BPA occurred at pH 6.0, due to the formation of ferric-oxalate complexes and OH radicals in the synergistic interactions of OA and α-FeOOH. This finding highlights that the oxalate-promoted photo-Fenton-like process using the α-FeOOH catalyst may be used for wastewater treatment without pH adjustment.

Identifier

84982703205 (Scopus)

Publication Title

Photochemical and Photobiological Sciences

External Full Text Location

https://doi.org/10.1039/c6pp00051g

e-ISSN

14749092

ISSN

1474905X

First Page

1046

Last Page

1053

Issue

8

Volume

15

Grant

2014M561356

Fund Ref

Harbin Institute of Technology

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