Substrate clogging is one of the bottlenecks restricting the sustainable operation of constructed wetland.
According to the previous research conducted by the group led by Prof. WU Zhenbin from the Institute of Hydrobiology (IHB) of the Chinese Academy of Sciences, the blocking parts of vertical subsurface constructed wetlands mainly occur on the substrate surface and upper packing layer, and refractory biomass pollutants are one of the main components of clogging materials in wetland.
The researchers synthesized and prepared a novel composite photocatalyst with hydrophobicity modified Sr/TiO2-PCFM. The results indicated that the composite photocatalyst possessed a pure and highly crystalline anatase TiO2 layer and large specific surface area.
They investigated the photodegradation of acephate by Sr/TiO2-PCFM under various conditions and found that the kinetics of the acephate photodegradation followed that of a pseudo-first-order reaction. The acephate-preferred photocatalytic performance of the modified Sr/TiO2-PCFM with hydrophobic characteristics was explored for the first time in this study.
Researchers found that the photocatalytic degradation process for the modified Sr/TiO2-PCFM preferred acephateover methylene blue (MB) in the acephate/MB mixture under ultraviolet light irradiation.
The study, published in Chemical Engineering Journal, highlights that the modified Sr/TiO2-PCFM is a promising candidate for the preferential degradation of refractory organic matter in organophosphorus pesticides contaminated wastewater.
Schematic diagram of photocatalytic priority degradation. (Image by IHB)
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