Abstract
The conditions for photocatalytic degradation of ethylenediaminetetraacetic acid (EDTA) in aqueous solution with Fe-doped titanium dioxide (TiO2) were optimized. The degradation efficiencies with Fe-doped TiO2 were better, compared with those obtained with bare TiO2 and Pt-doped TiO2. The effect of various experimental factors, such as photocatalytic dosage, temperature, solution pH and light intensity on the photocatalytic degradation of EDTA by Fe-doped TiO2 was investigated. The photocatalytic degradation treatment for the wastewater containing EDTA is simple, easy handling and low cost.
Highlights
The treatment of radioactive liquid waste from radiochemical plants and nuclear power plants become one ofSince ethylenediaminetetraacetic acid (EDTA) is stable, has low biodegradability, is rarely degradable by chlorine, is hardly retained by activated carbon fibers and is resistant to ozone treatment, it is a crucial step to perform a pretreatment step for the removal of EDTA for a better treatment of the liquid waste [1]-[9].Recently, advanced oxidation method based on the photocatalysis has been employed successfully for the degradation of organic pollutants
Very few works related to the use of Fe-doped TiO2 in the photocatalytic degradation of EDTA in the aqueous solution have been reported
In order to study the effect of doping metals on the photocatalytic degradation of EDTA in aqueous solution with TiO2, Pt and Fe-deposited photocatalysts were evaluated for the improvement of degradation efficiency
Summary
Since EDTA is stable, has low biodegradability, is rarely degradable by chlorine, is hardly retained by activated carbon fibers and is resistant to ozone treatment, it is a crucial step to perform a pretreatment step for the removal of EDTA for a better treatment of the liquid waste [1]-[9]. The liquid waste containing bisphenol [10], phthalate [11] and agricultural chemicals (thiram [12]) has been treated with the photocatalytic degradation techniques. Nitoi et al [9] have investigated the photocatalytic degradation of nitrobenzene in the aqueous solution with un-doped TiO2 and Fe, Co and Ni-doped TiO2 powders. Fe-doped TiO2 was very effective for the photocatalytic degradation of nitrobenzene. Several studies have been reported for the photocatalytic degradation of EDTA with titanium dioxide (TiO2) semiconductors [3] [7]. Very few works related to the use of Fe-doped TiO2 in the photocatalytic degradation of EDTA in the aqueous solution have been reported. The photocatalytic degradation of EDTA in the aqueous solution with Fe-doped TiO2 has been investigated. The treatment conditions such as the photocatalytic dosage, temperature, solution pH and light intensity have been optimized
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