Removal efficiency of anionic surfactants from water during UVC photolysis and advanced oxidation process in H2O2/UVC system

Abstract

Surfactants after their use are discharged into aquatic ecosystems. These compounds may be harmful to fauna and fl ora in surface waters or can be toxic for microorganisms of the activated sludge or biofi lm in WWTP. In order to determine effectiveness of different advanced oxidation processes on the degradation of surfactants, in this study the degradation of anionic surfactants in aqueous solution using photolysis by 254 nm irradiation and by advanced oxidation process in a H 2 O 2 /UVC system was investigated. Two representatives of anionic surfactants, linear alkyl benzene sulphonate (LAS-R 11-14 ) and ether carboxylic derivate (EC-R 12-14 E 10 ) were tested. The infl uence of pH, initial surfactant concentration and dose of hydrogen peroxide on the degradation was also studied. Results show outstanding effectiveness of the H 2 O 2 /UVC system in the removal of surfactant from aqueous solutions.

UV Based Advanced Oxidation Process for Degradation of Ciprofloxacin: Reaction Kinetics, Effects of Interfering Substances and Degradation Product Identification

“…) anion. The HO2is dominant at pH > 10 and reacts with undissociated H2O2 and hydroxyl radical (Rios et al 2017). Therefore, the hydroxyl radical concentration is lowered than expected at higher pH.…”

Ozonation treatment processes for the remediation of detergent wastewater: A comprehensive review

“…The radical oxidative species (ROS) for different AOPs are shown in Table 2. Different AOPs have been effectively used for the degradation of detergent surfactants or treatment of laundry wastewater such as ozone-based AOP [24][25][26][27][28][29], Fenton process [30][31][32][33][34][35], electrochemical oxidation [36][37][38], photolysis [39][40][41][42][43][44], photocatalysis [45][46][47], ultrasound [48][49][50] or in some cases a combination of these methods with conventional methods [51][52][53][54][55].…”

“…However, based on the recent market report, the market projection for amphoteric surfactants is expected to grow from $3.52 billion in 2018 to $4.94 billion by 2023 due to the rising demand for personal care products and highperformance of amphoteric surfactants [167]. Review of biodegradation treatment for amineoxide-based surfactants shows that the percentage of ultimate biodegradation was 70% after 28 days [168]. So, it is suggested that more studies should be performed in order to study the feasibility of pre-treatment of amphoteric surfactants with ozonation prior the biological method in order to increase the surfactants' biodegradability.…”

Kinetic Approach by Photocurrent Measurements to the Photoelectrocatalytic Oxidation of an Anionic Surfactant Using an S,N-TiO2/Ti Electrode: Distinguishing Between Direct and Indirect Mechanisms

“…Advanced oxidation processes (AOPs) based on the formation of reactive species such as hydroxyl radicals ( • OH) are capable of successfully degrading anionic surfactant found in wastewater [7][8][9][10]. Among these AOPs the photocatalysis and the electrochemical oxidation processes have attracted considerable attention for the removal of aqueous anionic surfactant due to that they are well studied in their reaction mechanism, providing fast and efficient oxidation and effective mineralization as compared to other AOPs with the main advantage that no excess chemicals are used.…”