Publications by authors named "Benjamin D Fennell"
UV-advanced reduction processes (UV-ARP), characterized by the strongly reducing aqueous electron (e ), have been shown to degrade perfluoroalkyl and polyfluoroalkyl substances (PFAS). Due to the high cost of PFAS destruction technologies, concentrated waste streams derived from physical treatment processes, such as ion exchange or membrane concentrates, are promising targets for implementation of these technologies. However, there are limited studies on the application of UV-ARP for PFAS destruction in concentrated waste streams.
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- Advanced reduction processes (ARP) are effective for treating stubborn contaminants like PFAS, but the role of dissolved organic matter (DOM) on hydrated electron availability needs more research.
- Using specific techniques, researchers measured how DOM interacts with hydrated electrons, finding reaction rates for different organic substances and noting that these rates are consistent across varying pH and ionic strengths.
- The study showed that DOM significantly affects the efficiency of contaminant degradation in ARP, especially in waste streams with high DOM levels, by scavenging hydrated electrons and reducing their reactivity.
Article Synopsis
- Ultraviolet advanced reduction processes (UV-ARP) are gaining attention for their ability to break down challenging contaminants, especially PFAS substances.
- The concentration of hydrated electrons ([e]) is crucial for the effectiveness of UV-ARP, but reports on [e] in existing literature are scarce.
- A new method utilizing monochloroacetate was developed to measure [e] over time and its impact on the degradation of contaminants like nitrate and PFOS, showing that treatment effectiveness is mainly influenced by electron scavengers in the water rather than initial scavenging conditions.
UV-advanced reduction processes (UV-ARP) are an advanced water treatment technology characterized by the reductive transformation of chemical contaminants. Contaminant abatement in UV-ARP is most often accomplished through reaction with hydrated electrons (e ) produced from UV photolysis of chemical sensitizers (e.g.
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