Figure 2

The production of short-chain perfluorinated acids as a function of irradiation time during the degradation of PFOA.
Experimental conditions: the initial concentrations of PFOA, 3-indole-acetic-acid, and HDTMA-montmorillonite were 10 mg L−1, 1 mM and 2.2 g L−1, respectively; pH was adjusted to 6.0 by adding NaOH and HCl; a 36 W low-pressure mercury lamp was used to provide light irradiation.