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...

Simple and reliable procedures have been developed for analyses of N03 , total N, and organic N in fresh waters. N03is determined by second-derivative UV spectroscopy. Total N and organic N are determined based on secondderivative analyses of N03following persulfate digestion. Resolution of organic N determinations was increased by using ion-exchange resins to remove N03from samples with high c...

Background: Advanced oxidation processes are used to remove toxic aromatic compounds with low biodegradability, such as 2-chlorophenol. This study investigates the use of Sulfate (SO4-) and persulfate (S2O82-) radicals, as one of the advanced oxidation methods, to remove 2- chlorophenol from aquatic solutions. Materials and Methods: This experimental and pilot-scale study was carried out usi...

Heat-activated persulfate was tested for destruction of polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) in the laboratory. Combined technology of in situ chemical oxidation (ISCO) and in situ thermal remediation (ISTR) using heat-activated persulfate can be applied for destruction of the PCDD/Fs polluted soil and the PCDD/Fs containing fly ash from incineration process. To explore the treata...

Bio-electro-Fenton is emerging as an alternative technology for the efficient and cost-effective removal of refractory micropollutants. Though promising, there are still several challenges that limit its wide application, including acidic operating conditions (pH at 2–3), addition supporting electrolytes (e.g., Na2SO4), issue iron sludge generation. To address these challenges, a novel hybrid p...

Leachate pollution is one of the main problems in landfilling. Among the most problematic parameters in stabilized leachate are COD, ammonia, and color. The treatment technology that can be used may differ based on the type of leachate produced. Even after treatment, the effluent characteristics are always hard to comply with the discharge standard. Ozonation is one of the chemical processes th...