Dual-frequency ultrasound (DFUS) has received considerable attention for enhanced inactivation of microbial pathogens medical treatment, but remains little investigated water disinfection. This study is focused on E. coli and faecalis in aqueous solution under dual-frequency ultrasonication at 120 + 1700 kHz using persulfate. Single-frequency ultrasonic showed the higher efficiency kHz, compare...

Sustainable waste utilization techniques are needed to combat the environmental and economic challenges faced worldwide due rising population. Biochars, their unique surface properties, offer opportunities modify prepare application-specific materials. The aim of this research is study effects biochar modification by oxidizing chemicals on properties. Pine bark was modified with sulfuric acid, ...

Nine transition metals were tested for the activation of three oxidants and the generation of inorganic radical species such as sulfate, peroxymonosulfate, and hydroxyl radicals. From the 27 combinations, 14 M/Ox couples demonstrated significant reactivity toward transforming a model organic substrate such as 2,4-dichlorophenol and are further discussed here. It was found that Co(II) and Ru(III...

Activated persulfate oxidation technologies based on sulfate radicals were first evaluated for defluorination of aqueous perfluorooctanesulfonate (PFOS). The influences of catalytic method, time, pH and K2S2O8 amounts on PFOS defluorination were investigated. The intermediate products during PFOS defluorination were detected by using LC/MS/MS. The results showed that the S2O8 (2-) had weak effe...

to improve the photo-catalytic degradation of salicylic acid, we reported the fabrication of ordered tio2 nanotube arrays by a simple and effective two-step anodization method and then these tio2 nanotubes treated in a methanol solution under uv light irradiation. the tio2 nanotubes prepared in the two-step anodization process showed better photo-catalytic activity than tio2 nanotubes prepared ...

Sammary-nree soil humic' aelds were degraded by a new mild chemical oxidatioo me!hod usiog potassium persulfate at pH 2.0. The melbod degraded 30-40"/0 of!he staning material. n. type and relative quantities of tbe products or fragments released as detennined by GC¡MS varíed with the source of lbe polymers. Humic aeld extracted from ao Inceptisol yielded fatty, benzenecarboxylic and pbenolic ae...