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...

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...

Sulfate radical (SO4(•-)) is a strong, short-lived oxidant that is produced when persulfate (S2O8(2-)) reacts with transition metal oxides during in situ chemical oxidation (ISCO) of contaminated groundwater. Although engineers are aware of the ability of transition metal oxides to activate persulfate, the operation of ISCO remediation systems is hampered by an inadequate understanding of the f...

In this study, the degradation of sulfonamide antibiotics was investigated through persulfate-enhanced UV advanced oxidation process. Factors that may affect efficiency were analyzed. Results showed persulfate imposed a significant enhancement on process during sulfathiazole degradation. The combined UV/persulfate can effectively remove about 96% within 60 min. With increase in dosage persulfat...

A flow-injection system with a glassy carbon disk electrode modified with Prussian Blue film is proposed for the determination of persulfate in commercial samples of hair bleaching boosters by amperometry. The detection was obtained by chronoamperometric technique and the sample is injected into the electrochemical cell in a wall jet configuration. Potassium chloride at concentration of 0.1 mol...

Sodium persulfate is a common oxidant used for in situ chemical oxidation (ISCO) remediation of ground water contaminants (e.g., trichloroethylene (TCE)). Following ISCO unused persulfate and oxidation by-products such as sulfates remain within the groundwater at elevated levels. In this laboratory study the performance of three membranes: one nanofiltration (NF) membrane (designated DK) and tw...

The Du Pont aca “NBIL” test (Du Pont Instruments, Wilmington, DE 19898) also measures bilirubin spectrophotometrically. Figure 2 shows an approximate linear relationship between “apparent” biliburin concentration, as measured with the Bilirubin Stat-Analyzer and the aca NBIL test, vs Liposyn concentration in a neonatal serum sample. This sample without added Liposyn gave identical total bilirub...

The use of heat-activated peroxymonosulfate oxidation for the degradation antibiotic compound sulfamethoxazole (SMX) was studied in this paper. It found that process follows a pseudo-first order kinetic model. Increasing oxidant concentration and/or activation temperature led to higher efficiency. pH from 3 9.5 resulted efficiency as well, although SMX significantly inhibited at 11. Through rad...