advanced oxidation process Articles
-
Degradation of chlorpyriphos in water by advanced oxidation processes
The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was ...
-
Degradation of propoxycarbazone-sodium with advanced oxidation processes
The degradation of propoxycarbazone-sodium, an active component of commercial herbicide, in aqueous solution with ozone, UV photolysis and advanced oxidation processes: O3/UV, O3/UV/H2O2, H2O2/UV, and the Fenton process was studied. All these methods of degradation proved feasible. The kinetics of propoxycarbazone-sodium degradation in water followed the pseudo-first order equation for all ...
-
Combined homogeneous and heterogeneous advanced oxidation process for the treatment of tannery wastewaters
This study investigated the practical application of combined advanced oxidation processes (AOPs), such as homogeneous TiO2 photocatalysis and heterogeneous photo-Fenton, for the treatment of tannery wastewaters. An optimization study was conducted on the photocatalytic degradation of tannery wastewaters, in order to understand the effects of different operating parameters on the degradation ...
-
Advanced oxidation processes with coke plant wastewater treatment
The aim of this study was to determine the most efficient method of coke wastewater treatment. This research examined two processes – advanced oxidation with Fenton and photo-Fenton reaction. It was observed that the use of ultraviolet radiation with Fenton process had a better result in removal of impurities. ...
-
Advanced oxidation processes for the treatment of chlorpyrifos, dimethoate and phorate in aqueous solution
Photo-chemical-transformations of organophosphate pesticides, chlorpyrifos, dimethoate and phorate, using advanced oxidation processes (AOPs) namely UV photolysis, UV/H2O2, UV/Fenton and Fenton systems in aqueous solution were investigated in this work. A laboratory set-up was designed to evaluate and select the optimal oxidation process. Results show that addition of hydrogen ...
-
Radicals induced from peroxomonosulfate by nanoscale zero-valent copper in the acidic solution
A highly efficient advanced oxidation process for the degradation of benzoic acid (BA) during activation of peroxomonosulfate (PMS) by nanoscale zero-valent copper (nZVC) in acidic solution is reported. BA degradation was almost completely achieved after 10 min in the nZVC/PMS process at initial pH 3.0. PMS could accelerate the corrosion of nZVC in acidic to release Cu+ which can further ...
-
Advanced Oxidation Processes (AOPs) for reduction of organic pollutants in landfill leachate: a review
Uncontrolled municipal landfill leachate during landfilling can seriously pollute groundwater, surface water and soil. Over the past decades, a variety of Advanced Oxidation Processes (AOPs), primarily utilising hydroxyl radicals to effect water purification, have been frequently investigated for treatment of landfill leachate. This paper first summarises the typical characteristics of organic ...
-
Removal of COD and colour from old-landfill leachate by Advanced Oxidation Processes
This research aims to apply Advanced Oxidation Processes (AOPs) using ozonation, combined O3/H2O2 and Fenton reaction for simultaneous COD and colour removal from old-landfill leachate. The efficiencies of the AOPs for both COD and colour removal could be ranked in this order; Fenton reaction > O3/H2O2 > O3. The Fenton reaction, operated at pH 3 could significantly remove more than 85% of colour ...
-
Role of optical density on the choice of photolytic reactor
Photolysis and photo–catalysis are two classifications of advanced oxidation processes for treating toxic wastes. Stark–Einstein law and Lambert–Beer's law equation are widely used to explain the kinetics of the photolytic reactions. The optical density influences the rate of reaction. The influence of optical density on transmittance and order of reaction has been analysed. An effectiveness ...
-
Benefits & Disadvantages of the Advanced Oxidation Process
In many water and wastewater treatment applications, there are a number of pollutants that are difficult to reduce by physical, chemical, or biological means alone. In more recent years, there has been a growing concern regarding pharmaceutical drugs in drinking water and aquatic environments. Pesticides get caught in runoff from farms into freshwater supplies. Personal care products are ...
-
Treatment of textile effluent using Advanced Oxidation Process and Nanofiltration
Textile effluent containing two dyes, Cibacron Red (CR) and Cibacron Black (CB) and NaCl was treated using advanced oxidation process and nanofiltration. In Scheme 1, advanced oxidation was followed by NF and in Scheme 2, two-step NF was employed. In Scheme 1, dye concentrations fell below 1 mg/l. In Scheme 2, two-step NF results in permeate concentration less than 1 mg/l of dyes. Salt recovery ...
-
Successful degradation of a cobalt organic complex and TOC by advanced oxidation processes
A chemical manufacturing plant needed to remove cobalt from biologically treated wastewater. The current cobalt concentration is higher than 1000 ppb and needs to be reduced to below 5 ppb. Cobalt speciation analysis results have shown that much of the cobalt is present as organically bound complexes. These complexes are known to be difficult to remove by adsorption, precipitation or ion ...
-
Pros and Cons of the Advanced Oxidation Process
Benefits & Disadvantages of the Advanced Oxidation Process In many water and wastewater treatment applications, there are a number of pollutants that are difficult to reduce by physical, chemical, or biological means alone. In more recent years, there has been a growing concern regarding pharmaceutical drugs in drinking water and aquatic environments. Pesticides get caught in runoff from ...
-
Inactivation of
Pseudomonas aeruginosa in electrochemical advanced oxidation process with diamond electrodesThe electrochemical advanced oxidation process (EAOP) with diamond electrodes may serve as an additional technology to the currently approved methods for water disinfection. Only few data exist on the microbicidal effect of the EAOP. The aim of our study was to investigate the microbicidal effect of a flow-through oxidation cell with diamond electrodes, using Pseudomonas aeruginosa as the test ...
-
Correlation and prediction of azo dye degradation by nonlinear least-square regression in combined ozonation and ultrasonolysis processes
Correlative reaction kinetics based on nonlinear least square regression were obtained to predict the degradation of p-aminophenol (PAP), C.I. Reactive Yellow 84 (RY84), C.I. Reactive Blue 19 (RB19), and C.I. Direct Red 23 (DR23) in combined ultrasonolysis and ozonation. Effects of ultrasonolysis and ozonation as individual processes, as well as the synergetic effect for the degradation of azo ...
-
Decoloration of methylene blue simulated wastewater using a UV-H2O2 combined system
Methylene blue simulated wastewater was treated with a UV-H2O2 combined system. Influences of factors such as reaction time, initial pH value and H2O2 dosage were investigated, and the reaction kinetics of the process was explored. Results showed that the degradation of methylene blue happened only in the presence of both conditions: UV irradiation and H2O2 addition. Initial pH and H2O2 dosage ...
-
Photocatalytic ozonation of 2, 4-dichlorophenoxyacetic acid in water with a new TiO2 fiber
More effective techniques are required to mineralize the increasing number of recalcitrant organic contaminants at low concentrations in the water environment using advanced oxidation process. Though relatively new, photocatalytic ozonation (O3/UV/TiO2) is considered superior to ozonation (O3) and photocatalysis (UV/TiO2), due to synergistic effects and use of immobilized TiO2 photocatalysts is a ...
-
Degradation of phenolic wastewaters by solar/TiO2 and solar/TiO2/H2O
The application of Advanced Oxidation Processes (AOPs) (solar/TiO2 and solar/TiO2/H2O2) to treat phenol, o-cresol, m-cresol, and p-cresol wastewaters was investigated. The experiments were performed in batch solar reactor using TiO2 as catalyst. The effect of the hydrogen peroxide concentration on the degradation kinetics was evaluated in the range of 0.15?1.5 g/L. It was observed that the ...
-
Effect of advanced oxidation processes on nonylphenol removal with respect to chlorination in drinking water treatment
Any nonylphenol compounds found in water have to be removed since they are endocrine disruptors. In this study, natural water from the river Ebro fortified with nonylphenol compounds (4n-nonylphenol and technical nonylphenol) is used as a sample in order to simulate a real situation in drinking water treatment plants. The aim is to compare conventional disinfection with advanced oxidation ...
-
An advanced oxidation process using ionized gas for wastewater treatment
This study on removing non-degradable materials in wastewater focused primarily on advanced oxidation methods such as ozone, ozone/UV and ozone/H2O2. Wastewater treatment using an ionized gas from plasma has been actively progressing. The ionized gas involves reactive species such as O2+, O2− cluster, O radical and OH radical. Since the ionized gas method has such outstanding characteristics as ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you