Treatment of Liquid Waste Containing Ethylenediamine Tetraaceticaxid by Advanced Oxidation Processes
-
S. Chitra
,
K. Paramasivan
Abstract
Ethylenediaminetetraacetic acid (EDTA) is a chelating agent that has been used for decontamination purposes in nuclear industry. The presence of EDTA in decontamination wastes can cause complexation of the cations resulting into interferences in their removal by various treatment processes such as chemical precipitation, ion exchange etc. Further, it might also impart elevated leachability and higher mobility of cationic contaminants from the conditioned wastes i.e. waste immobilized in cement or other matrices and can negatively influence the quality of the final form of waste. Advanced Oxidation Processes (AOP) using ozone, H2O2, ultrasonics, ultraviolet (UV)5 Fenton’s reagent (Fell + H2O2) alone or in combination are considered as possible methods of clean and ecologically safe remedial treatment for the degradation of organics. In the present study, kinetics of photochemical oxidation of EDTA (20,000 mg/1) utilizing combination of processes viz., sunlight + Fenton’s reagent, UV + Fenton’s reagent, UV + H2O2 and of chemical oxidation using Fenton’s reagent and H2O2 at pH 10, 7 and 3.8 have been investigated. Both photochemical oxidation and chemical oxidation yielded complete degradation of EDTA at different rates. The photochemical reaction was found to follow a first order kinetics reaction. When compared to the rate of degradation using Fell + H2O2, the rate of degradation in sunlight + Fell + H2O2 and UV (15W) + Fell + H2O2 was enhanced 66 times and 40 times respectively. Alkaline pH favored faster degradation of EDTA when compared to acidic and neutral pH. From the observed pH changes during the oxidation processes, it can be concluded that there is a loss of chelating ability of EDTA. Formation of amides in the photochemical degradation and formation of acidic intermediates during the chemical oxidation was confirmed.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Preface
- Synergetic Effects of Non-thermal Plasma and Catalysts on VOCs Decomposition
- Measurements of Electron Energy by Emission Spectroscopy in Pulsed Corona and Dielectric Barrier Discharges
- Kinetics, Products and Mechanism of Destruction of Ethane in Corona Discharge
- Destruction of Isotopically Enriched Nitric Oxide, 15N18O, in Air in Corona Discharge: Direct Observation of NOx Reduction to Molecular Nitrogen
- Development of Demonstration Plant Using Non-thermal Plasma Process to Remove SO2 and NOx from Flue Gas
- Approach of the Physical and Chemical Specific Properties of Pulsed Surface Dielectric Barrier Discharges in Air at Atmospheric Pressure
- Removal of Gaseous Acetaldehyde via a Silent Discharge Reactor Packed with Al2O3 Beads
- Characteristics of Nitric Monoxide Generation Using High Frequency Silent Discharge
- Oil Cracking Characteristics by Streamer Discharge in Oil
- Development of Photocatalyst Plasma Air Cleaning Filter Used in Air Conditioner
- The Effects of Using Various Types of Pulsed Discharge Reactors for Phenol Removal in Waste Water
- Decomposition of VOC in Air Using a Streamer Corona Discharge Reactor Combined with Catalyst
- Photodegradation of VOCs and Bad Smells in a TiO2 Coated Honeycomb Monolith Reactor
- Dilute Trichloroethylene Decomposition in Air by Using Non-Thermal Plasma - Catalyst Effect
- Photocatalysed Degradation of a Herbicide Derivative, Diphenamid in Aqueous Suspension of Titanium Dioxide
- Treatment of Liquid Waste Containing Ethylenediamine Tetraaceticaxid by Advanced Oxidation Processes
Articles in the same Issue
- Preface
- Synergetic Effects of Non-thermal Plasma and Catalysts on VOCs Decomposition
- Measurements of Electron Energy by Emission Spectroscopy in Pulsed Corona and Dielectric Barrier Discharges
- Kinetics, Products and Mechanism of Destruction of Ethane in Corona Discharge
- Destruction of Isotopically Enriched Nitric Oxide, 15N18O, in Air in Corona Discharge: Direct Observation of NOx Reduction to Molecular Nitrogen
- Development of Demonstration Plant Using Non-thermal Plasma Process to Remove SO2 and NOx from Flue Gas
- Approach of the Physical and Chemical Specific Properties of Pulsed Surface Dielectric Barrier Discharges in Air at Atmospheric Pressure
- Removal of Gaseous Acetaldehyde via a Silent Discharge Reactor Packed with Al2O3 Beads
- Characteristics of Nitric Monoxide Generation Using High Frequency Silent Discharge
- Oil Cracking Characteristics by Streamer Discharge in Oil
- Development of Photocatalyst Plasma Air Cleaning Filter Used in Air Conditioner
- The Effects of Using Various Types of Pulsed Discharge Reactors for Phenol Removal in Waste Water
- Decomposition of VOC in Air Using a Streamer Corona Discharge Reactor Combined with Catalyst
- Photodegradation of VOCs and Bad Smells in a TiO2 Coated Honeycomb Monolith Reactor
- Dilute Trichloroethylene Decomposition in Air by Using Non-Thermal Plasma - Catalyst Effect
- Photocatalysed Degradation of a Herbicide Derivative, Diphenamid in Aqueous Suspension of Titanium Dioxide
- Treatment of Liquid Waste Containing Ethylenediamine Tetraaceticaxid by Advanced Oxidation Processes
