Combinative dyebath treatment with activated carbon and UV/H2O2: a case study on Everzol Black-GSP®

2002 ◽  
Vol 46 (4-5) ◽  
pp. 51-58 ◽  
Author(s):  
N.H. Ince ◽  
D.A. Hasan ◽  
B. Üstün ◽  
G. Tezcanli
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Carbon Mineralization ◽  
Oxidative Degradation ◽  
Advanced Oxidation ◽  
Color Removal ◽  
Operating Parameters ◽  
Cost Reductions ◽  
H2o2 System

Treatability of textile dyebath effluents by two simultaneously operated processes comprising adsorption and advanced oxidation was investigated using a reactive dyestuff, Everzol Black-GSP® (EBG). The method was comprised of contacting aqueous solutions of the dye with hydrogen peroxide and granules of activated carbon (GAC) during irradiation of the reactor with ultraviolet light (UV). Control experiments were run separately with each individual process (advanced oxidation with UV/H2O2 and adsorption on GAC) to select the operating parameters on the basis of maximum color removal. The effectiveness of the combined scheme was tested by monitoring the rate of decolorization and the degree of carbon mineralization in effluent samples. It was found that in a combined medium of advanced oxidation and adsorption, color was principally removed by oxidative degradation, while adsorption contributed to the longer process of dye mineralization. Economic evaluation of the system based on total color removal and 50% mineralization showed that in the case of Everzol Black-GSP®, which adsorbs relatively poorly on GAC, the proposed combination provides 25% and 35% reduction in hydrogen peroxide and energy consumption relative to the UV/H2O2 system. Higher cost reductions are expected in cases with well adsorbing dyes and/or with less costly adsorbents.

scholarly journals PENGOLAHAN AIR LIMBAH BERWARNA INDUSTRI TEKSTIL DENGAN PROSES AOPs

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Rudi Nugroho ◽  
Ikbal Mahmud
Keyword(s):  
Hydrogen Peroxide ◽  
Wastewater Treatment ◽  
Key Words ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Color Removal ◽  
Oxidation Processes ◽  
Oxidizing Agents ◽  
Textile Wastewater Treatment

An experiment of advanced oxydation processes (AOPs) was applicated in textile wastewater treatment for color removal. The experiment was conducted in laboratory scale using ozon and hydrogen peroxide as oxidizing agents. The textile wastewater contains any organic and inorganic dyes that could not be effective treated by coagullation and and sedimentation as well as by conventional aerobic treatments. Result of the experiments concluded that the AOPs technologies could be applied effectively for removal of color. Addition of hydrogen peroxide with volume of 0.25 ml for 1 liter of wastewater exhibits the reaction. The reaction of AOPs for color removal was optimum at temperatur of 70oC. As higher as pH, the reaction become faster and the efficiency of color removal become higher.   Key words:  advanced oxidation processes, color removal, hydrogen peroxide, ozon, 

Use of selected advanced oxidation processes (AOPs) for wastewater treatment - a mini review

2013 ◽  
Vol 10 (3) ◽  
pp. 376-385 ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Municipal Wastewater ◽  
Uv Light ◽  
Advanced Oxidation ◽  
Operating Parameters ◽  
Operational Cost ◽  
Initial Concentration ◽  
Oxidation Processes

Advanced oxidation processes (AOPs) are widely used for the removal of recalcitrant organic constituents from industrial and municipal wastewater. The aim of this study was to review the use of titanium dioxide/UV light process, hydrogen peroxide/UV light process and Fenton’s reactions in wastewater treatment. The main reactions and the operating parameters (initial concentration of the target compounds, amount of oxidation agents and catalysts, nature of the wastewater etc) affecting these processes are reported, while several recent applications to wastewater treatment are presented. The advantages and drawbacks of these methods are highlighted, while some of the future challenges (decrease of operational cost, adoption of strategies for processes integration) are discussed.

scholarly journals Výskyt pesticídnych látok vo vodnom prostredí a ich odstraňovanie z pitných vôd pomocou pokročilých oxidačných procesov

Entecho ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 1-5
Author(s):  
Tamara Pacholská ◽  
Pavla Šmejkalová
Keyword(s):  
Hydrogen Peroxide ◽  
Drinking Water ◽  
Activated Carbon ◽  
Water Resources ◽  
Water Supply ◽  
Uv Radiation ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Intensive Use

Intenzívne používanie pesticídnych látok spôsobilo na mnohých miestach vážne problémy v ekosystéme, najmä čo sa týka vodných zdrojov, kam sa tieto látky dostávajú. Keďže klasickou vodárenskou technológiou nie je možné pesticídy z vody odstraňovať, nachádzajú sa tak tieto látky v nadlimitných koncentráciách v pitných vodách. Preto je nutné navrhnúť technológiu, ktorá bude v ich odstraňovaní účinná. Ako vhodné sa ukazujú pokročilé oxidačné procesy (AOPs) v kombinácii s granulovaným aktívnym uhlím (GAU). Cieľom tohto experimentu bolo porovnať účinok ozonizácie a pokročilých oxidačných procesov, z ktorých sa overovala kombinácia ozónu s UV žiarením (O3 + UV) a ozónu s peroxidom vodíka (O3 + H2O2) s následnou sorpciou na GAU. Abstract (en) Intensive use of pesticides has caused serious problems in the ecosystem in many places, especially in terms of the water resources to which pesticides enter. It is not possible to remove pesticides from water using conventional water supply technology, so these substances are found in above-limit concentrations in drinking water. Therefore, it is necessary to design a technology that will be effective in removing them. Advanced oxidation processes (AOPs) in combination with granular activated carbon (GAU) prove to be suitable. The aim of this experiment was to compare the effect of ozonation and advanced oxidation processes, which verified the combination of ozone with UV radiation (O3 + UV) and ozone with hydrogen peroxide (O3 + H2O2) followed by sorption on GAU.

NOMINAL DESIGN AND OPERATING PARAMETERS OF AQUATUBULAR STEAM GENERATORS FEED BY SOLID, LIQUID AND GASEOUS FUELS: A CASE STUDY

2019 ◽  
Author(s):  
Daniel Mazzette Souza ◽  
Wellington Balmant ◽  
JOSÉ VIRIATO COELHO VARGAS ◽  
Fernando Bóçon
Keyword(s):  
Operating Parameters ◽  
Steam Generators ◽  
Gaseous Fuels ◽  
Solid Liquid

A review of lignin hydrogen peroxide oxidation chemistry with emphasis on aromatic aldehydes and acids

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ajinkya More ◽  
Thomas Elder ◽  
Zhihua Jiang
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Degradation ◽  
Reaction Medium ◽  
Dicarboxylic Acids ◽  
Aromatic Aldehydes ◽  
Product Distribution ◽  
Reaction Conditions ◽  
Alkaline Conditions ◽  
The Stability ◽  
Oxidation Chemistry

Abstract This review discusses the main factors that govern the oxidation processes of lignins into aromatic aldehydes and acids using hydrogen peroxide. Aromatic aldehydes and acids are produced in the oxidative degradation of lignin whereas mono and dicarboxylic acids are the main products. The stability of hydrogen peroxide under the reaction conditions is an important factor that needs to be addressed for selectively improving the yield of aromatic aldehydes. Hydrogen peroxide in the presence of heavy metal ions readily decomposes, leading to minor degradation of lignin. This degradation results in quinones which are highly reactive towards peroxide. Under these reaction conditions, the pH of the reaction medium defines the reaction mechanism and the product distribution. Under acidic conditions, hydrogen peroxide reacts electrophilically with electron rich aromatic and olefinic structures at comparatively higher temperatures. In contrast, under alkaline conditions it reacts nucleophilically with electron deficient carbonyl and conjugated carbonyl structures in lignin. The reaction pattern in the oxidation of lignin usually involves cleavage of the aromatic ring, the aliphatic side chain or other linkages which will be discussed in this review.

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