Second-order rate constants of the direct ozone reactions [formula: see text] and the indirect OH radical reactions [formula: see text] for nine chemicals on the US EPA's Drinking Water Contaminant Candidate List (CCL) were studied during the ozonation and ozone/hydrogen peroxide advanced oxidation process (O(3)/H(2)O(2) AOP) using batch reactors. Except for the thiocarbamate herbicides (molina...

The effects of ozonation on the formation potential of typical disinfection byproducts (DBPs) and the changes of genotoxicity during post chlorination of tertiary effluent from a sewage treatment plant were investigated. Ozonation enhanced the yields of all detected chlorine DBPs except CHCl3. At a chlorine dose of 5 mg/L, the three brominated THMs and five HAAs increased, while chloroform decr...

Four pharmaceuticals (ranitidine, nizatidine, doxylamine, and carbinoxamine) were selected as model compounds to assess the efficiency of four oxidants (ozone (O3), chlorine (Cl2), chlorine dioxide (ClO2) and potassium permanganate (KMnO4)) on the removal of amine-based pharmaceutical and personal care products (PPCPs), as well as the reduction of their N-Nitrosodimethylamine formation potentia...

Pig slurry was used as the sole nutrient source to produce biomass of microalga Scenedesmus almeriensis using laboratory-scale bubble column photobioreactors. No differences in terms productivity were observed between fresh and digested pig slurry. The optimum dilution enable processing largest amount per litre 5%, which led a rate 0.68 g·L−1·day−1, comparable that standard growth medium formul...

ABSTRACT: In this project, a nano catalyst (TiO2) and ozone combined with each other and they were used for the removal of 4-nitrophenol (4NP) in industerial wastewater. The effect of some operational parameters such as initial pH (3-9), the concentration of pollutant (20-80 mg/L), and amount of TiO2 were investigated. In O3/TiO2 process, the anion radical  formed before the production of hydro...

background : the aim of this study was to evaluate the performance of water ozonation on disinfection by-product formation. methods : experiments were carried out on samples taken from tajan river, mazandaran province, iran. samples of the pre-filtered raw water and from the 3.5-l water tank reservoir (wt) were analyzed for uv-254 absorbance, dissolved organic carbon (doc), hs and non-hs, chlor...

The present status of antimicrobial-resistant bacteria (AMRB) and antimicrobial-susceptible (AMSB) in hospital effluent, sewage treatment plant (STP) influent, STP secondary effluent (chlorination), (ozonation), river water were analyzed an urban Japan by a 2-year monitoring survey. results revealed the existence multiple AMRB grouped into six classes whose numbers at 19 to 2,800 CFU/mL, influe...

   This paper intended to review the lameness in dairy cattle. But it was necessary to have an overview about the hoof anatomical structure, it's growth and overgrowth properties. Most common causes of lameness such as laminitis and its different clinical form or presentation such as sole ulcers, toe ulcers, white line disorders, sole and white linehemorrhages have been reviewed and discussed. ...

This article presents a calibration procedure for a model describing the role of NOM during ozonation. Calibration has been conceived as practical tool for engineering purpose. Using a single-phase batch protocol, two waters were investigated following experimental plans comprising 32 and 14 experiments. Results of the simulations show that the calibration procedure enables the model, for both ...