Highlights
– The reaction rate of PFAS can be high up to 2.400 h-1 in hydrothermal treatment.
– Additives can greatly enhance the performance of hydrothermal treatment for PFAS.
– Hydrothermal treatment reduced 71% of energy consumption than waste incineration.
Hydrothermal treatment, as a low-carbon, efficient, and economical technology, uses relatively simple experimental conditions and reagents to achieve near-complete degradation of PFAS. In future applications, attempts can be made to optimize hydrothermal treatment with other additives (e.g., biochar, iron sulfides, and iron oxides) to further lower reaction temperature and shorten the residual time, as it must strike a balance between temperature, time, and energy consumption while ensuring PFAS degradation effects. In addition, reactor corrosion and excessive water input should be taken into consideration when conducting large-scale applications. Taken together, hydrothermal treatment of PFAS shows excellent potential to be a more sustainable and effective option for PFAS removal from various environmental media.
DOI: 10.1016/j.eehl.2023.02.002
Authors: Qifeng Fan, Tiantian Gong, Qianling Dong, Wenbing Wang*
