Research progress on application of photocatalytic technology in water treatment
The water treatment application of photocatalytic technology,a technology with broad application prospects,not only can improve water quality safety,but also alleviate the global water resource shortages.In this review,the basic principles of photocatalytic technology and the characteristics of common photocatalysts were introduced,followed by an emphatic review on the application of photocatalytic technology in odor removal and disinfection in drinking water,dye wastewater,oily wastewater,pharmaceutical wastewater,catalytic reduction of heavy metal ions,aquaculture wastewater,and coking wastewater.Meanwhile,it was found that free radical and non-free radical pathways played important roles in this technology.Among photocatalytic materials,TiO2,metal-organic frameworks(MOFs)based photocatalytic materials and other similar materials(such as MIL series,ZIFs series,etc.)could produce more·OH;While TiO2 and g-C3N4 based photocatalytic materials could produce more·O2-and e-,and CdS,TiO2 and g-C3N4 based photocatalytic materials could produce more h+.Finally,the photocatalytic mechanism,photocatalytic materials,future development in water treatment direction and practical application were summarized and prospected.
photocatalysisdrinking waterdye wastewateroily wastewaterpharmaceutical wastewaterheavy metal ionsaquaculture wastewatercoking wastewater
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