Advanced Oxidation Water Treatment Articles on Environmental XPRT

Use of ultraviolet disinfection and advanced oxidation process for reclaimed water treatment of microcontaminants

KEY WORDS Innovative Treatment, Advanced Oxidation, Reclaimed Water, Ultraviolet light, Peroxide, Disinfection, Microcontaminants INTRODUCTION Many regions of the United States, experiencing rapid population growth and faced with the challenge of meeting increased water demands, are turning to reclaimed water as an alternative water ...

Oct. 13, 2007

By Water Environment Federation (WEF)

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 ...

Mar. 1, 2010

By IWA Publishing

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 ...

Jun. 22, 2015

By IWA Publishing

Treatment of leather industrial wastewater via combined advanced oxidation and membrane filtration

The liming/unhairing operation is among the important processes of the leather industry. It generates large amounts of effluent that are highly loaded with organic hazard wastes. Such effluent is considered one of the most obnoxious materials in the leather industry, causing serious environmental pollution and health risks. The effluent is characterized by high concentrations of the pollution ...

May 23, 2016

By IWA Publishing

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 ...

Jul. 1, 2010

By IWA Publishing

Demonstration of the HiPOx Advanced Oxidation Technology for the Treatment of MTBE-Contaminated Groundwater

The HiPOx technology is an advanced oxidation process that incorporates high-precision delivery of ozone and hydrogen peroxide to chemically destroy organic contaminants with the promise of minimizing bromate formation. A MTBE-contaminated groundwater from the Ventura County Naval Base in Port Hueneme, CA was used to evaluate this technology. Due to extremely high concentrations of bromide in the ...

Jan. 1, 2002

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 ...

Mar. 1, 2011

By IWA Publishing

Biofilm control in water by advanced oxidation process (AOP) pre-treatment: effect of natural organic matter (NOM)

The main goal of this study was to examine the influence of natural organic matter (NOM) on the efficiency of H2O2/UV advanced oxidation process (AOP) as a preventive treatment for biofilm control. Pseudomonas aeruginosa PAO1 biofilm-forming bacteria were suspended in water and exposed to various AOP conditions with different NOM concentrations, and compared to natural waters. H2O2/UV prevented ...

Jan. 1, 2011

By IWA Publishing

Oxidative degradation of signature compounds and TOC reduction using advanced oxidation processes

ESCO International; a company specialising in Advanced Oxidation Processes, Ozone and UV systems and with the primary objective of resolving water pollution issues on a global scale, worked on a semi-pilot scale project with an internationally well-known company in the chemical & polymers production industry, based in US. Organic compounds of concern include BI, MI, BPA, HEG and NPI ...

Nov. 4, 2014

By ESCO International

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 ...

Mar. 1, 2010

By IWA Publishing

Investigation of the use of Chlorine Based Advanced Oxidation in Surface Water: Oxidation of Natural Organic Matter and Formation of Disinfection Byproducts

Disinfection byproduct (DBP) formation during the treatment of raw Colorado River Water (CRW) using aqueous chlorine and ultraviolet (UV) light advanced oxidation processes (AOPs) was investigated. Here, CRW was combined with aqueous chlorine from two distinct sources (electrochemically—generated Mixed Oxidant Solution (MOS) and commercial sodium hypochlorite) and then exposed to ...

Jan. 1, 2013

By MIOX Corporation - Johnson Matthey`s Water Technologies

Chemical and toxicological evaluation of transformation products during advanced oxidation processes

The entry of pharmaceuticals into the water cycle from sewage treatment plants is of growing concern because environmental effects are evident at trace levels. Ozonation, UV- and UV/H2O2-treatment were tested as an additional step in waste water treatment because they have been proven to be effective in eliminating aqueous organic contaminants. The pharmaceuticals carbamazepine, ...

Nov. 13, 2013

By IWA Publishing

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 ...

Jul. 24, 2009

By Inderscience Publishers

Reducing Operating Costs using Efficient Advanced Oxidation Process Design & Optimisation

For many commercial and industrial operations, looking at ways to reduce water and wastewater monthly bill costs and ensure compliance with both current and future regulations, water reclaim is essential. A major water treatment challenge encountered in the search for new water sources is the reduction of TOC and COD at one or more locations. The purpose of this study is to show ...

Jun. 28, 2016

By ESCO International

Removal efficiency calculated beforehand: QSAR enabled predictions for nanofiltration and advanced oxidation

The efficiency of water treatment systems in removing emerging (chemical) substances is often unknown. Consequently, the prediction of the removal of contaminants in the treatment and supply chain of drinking water is of great interest. By collecting and processing existing chemical properties of contaminants, QSARs (quantitative structure-activity relationships) for typical removal parameters ...

Nov. 20, 2013

By IWA Publishing

Pharmaceutical removal during managed aquifer recharge with pretreatment by advanced oxidation

Organic micropollutants (OMPs) are detected in sources for drinking water and treatment possibilities are investigated. Innovative removal technologies are available such as membrane filtration and advanced oxidation, but also biological treatment should be considered. By combining an advanced oxidation process with managed aquifer recharge (MAR), two complementary processes are expected to ...

Oct. 19, 2012

By IWA Publishing

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 ...

Nov. 26, 2014

By ESCO International

Efficacy of Advanced Oxidation Processes for Elimination of Objectionable Contaminants from Wastewater Effluent

ABSTRACT Increasing demand for reclaimed water from wastewater treatment facilities has revolutionized the need for awareness of effluent quality and its properties. Wastewater can be made suitable for many reuse applications. Many of these applications for reclaimed water in industry, agriculture, and other beneficial uses have required stricter controls on the effluent quality from ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Determination of the ultrasonic effectiveness in advanced wastewater treatment

Biological treatment is the most commonly applied method for treatment of wastewaters. However, biological treatment can be inhibited by bacteriotoxic or persistent pollutants present in wastewater (Lifka et at., 2003). As a result, this technology may be incapable of reducing the levels of contaminants below which they are not considered as a potential threat to public health. Therefore, new ...

Mar. 20, 2006

By University of Tehran

Reduction of organic trace compounds and fresh water consumption by recovery of advanced oxidation processes treated industrial wastewater

Ozone (O3) has been used successfully in advanced wastewater treatment in paper mills, other sectors and municipalities. To solve the water problems of regions lacking fresh water, wastewater treated by advanced oxidation processes (AOPs) can substitute fresh water in highly water-consuming industries. Results of this study have shown that paper strength properties are not impaired and whiteness ...

Jan. 16, 2014

By IWA Publishing

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