To solve the problem of poor treatment high concentration landfill leachate, an electro-assisted ultraviolet (UV)/zero-valent iron (ZVI) synergic activated persulfate (PS) system was used to treat leachate. The effects PS and ZVI dosage, initial pH value, current density on removal efficiency COD NH3-N in leachate were investigated. single PS, electrochemical, UV/PS, ZVI/UV co-activated compare...

The persulfate-based advanced oxidation processes employing heterogeneous photocatalysts to generate sulfate radicals (SO4•?) from peroxydisulfate ion (PDS, S2O82?) have been extensively investigated remove organic pollutants. In this work, BiOX (X = Cl, Br, and I) were activate PDS enhance the transformation rate of various substances under UV (398 nm) Vis (400–700 radiation. For BiOCl BiOBr, ...

Abstract The kinetics and mechanism of the oxidative decolorization methylene blue (MB + ) as a cationic dye by persulfate using silver(I) catalyst in aqueous acidic medium were studied. effects different parameters like [H ], [Ag reactant concentration, micelles, temperatures investigated. kinetic data showed that [MB] obeyed pseudo‐first‐order taking large excess [S 2 O 8 2− ] over [MB ]. obs...

In recent years, advanced oxidation process (AOPs) based on sulfate radical (SO4??) and singlet oxygen (1O2) has attracted a lot of attention because its characteristics rapid reaction, efficient treatment, safety stability, easy operation. SO4?? 1O2 mainly comes from the activation reaction peroxymonosulfate (PMS) or persulfate (PS), which represent reactions involving radicals non-radicals, r...

This article describes a novel one-step method to prepare cellulose nanocrystals (CNCs) from bleached bagasse pulp via ammonium persulfate (APS) oxidation. The obtained persulfate oxidation cellulose nanocrystals (POCNs) were characterized for their microstructure, crystal properties, and chemical composition. The POCNs were successfully prepared with a total yield of 44.6%. Transmission electr...

The sulfate radicals (SO4•−)-based advanced oxidation process is an efficient way to degrade stubborn pollutants. However, the degradation products of 2,4-dinitrotoluene and effects different natural water matrices on by persulfate/Fe2+ are largely unknown. In this study, kinetics were investigated in matrices. can be divided into rapid-slow reaction stages, which was suitably described pseudo-...

Provocación bronquial específica en el trabajo y asma ocupacional por sales de persulfato To the Editor: Persulfate salts are the agents most commonly associated with occupational asthma (OA) among hairdressers. 1 Although the first cases were described decades ago, the prevalence, mechanism, value of diagnostic tests and the progress of these patients remain poorly defined. We present the case...