Introduction. Azithromycin is among the broad-spectrum antibiotics that is widely available in various environmental systems and could have destructive effects on the ecosystem and human health due to its bacterial resistance. In this study, removal of azithromycin from wastewater using an advanced oxidation process of ultraviolet light with and without persulfate was investigated and effective...

The Mo-based polyoxometalates containing mono- and dicobalt(III) catalyst cores, [CoMo(6)O(24)H(6)](3-) and [Co(2)Mo(10)O(38)H(4)](6-), were found to serve as O(2)-evolving catalysts in a system consisting of tris(2,2'-bipyridine)ruthenium(II) (Ru(bpy)(3)(2+)) and sodium persulfate (S(2)O) in an aqueous borate buffer solution at pH 8.0. Kinetics of O(2) evolution reveals that the higher cobalt ...

Nitrogen (N) is a macronutrient which required for growth of plants. The most common way providing nitrogen to the plants through urea fertilizers. With increasing demand crops, usage and as fertilizer has also been increasing. A lot that supplied in form fertilizers actually gets wasted. Almost 40–70 % not utilized by plants, generating environmental problems like eutrophication, therefore the...

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-...

The oxidation of caffeine with persulfate and hydroxyl radicals in aqueous solution has been studied by EPR spectroscopy and HPLC analysis. In both cases the formation of 1,3,7-trimethyluric acid is observed as the main final product. A C8]OH radical adduct is postulated as the intermediate after reaction with OH~, and leads to the final product after further oxidation. This radical is too shor...

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...

Methods for quantifying total dissolved phosphorus (TDP) were reevaluated. High-temperature ashing/hydrolysis (Ash/Hydrol.) and Acid Persulfate methods were examined for their ability to quantitatively convert a range of organic-P compounds to orthophosphate. The Ash/Hydrol. method recovered on average 99% of organic-P compounds tested, including phosphonates (compounds with C-P bonds). Contrar...