Enhanced degradation of bisphenol F in a porphyrin-MOF based visible-light system under high salinity conditions.

• Porphyrin-MOF greatly improved its performance in BPF removal under visible light in complex environments. • Photo-generation of ∙OH is enhanced by high salinity in PCN-223/visible-light system. • Possible degradation mechanism and pathway of BPF were proposed. • Toxicity of BPF was reduced in the PCN-223/visible-light system. The efficient degradation of organic contaminants in practical water treatment is a challenge for advanced oxidation processes via such as semiconductor photocatalysis due to interference from the inhibiting influence due to the reactions between radicals and coexisting anions in the actual water column. Herein, a porphyrinic zirconium metal–organic framework (PCN-223) is used in a visible light system to effectively decompose bisphenol F (BPF) in saline water. The PCN-223/visible-light system can effectively resist the influence of environmental coexisting anions and natural organic matter (NOM), thus demonstrating excellent performance in decomposing pollutants. Furthermore, the catalytic system is able to maintain stable contaminant degradation over a wide pH range and in five water matrices. Coexisting anions promote the conductivity of electrons by forming ionic bonds with Zr, which enhances light-induced electron transfer under visible light. This work illustrates the mechanism and conditions under which porphyrin-MOF can resist high salt environments in photocatalysis, and provides a new perspective on the practical application of photocatalysis to overcome complex environmental disturbances. [ABSTRACT FROM AUTHOR]