The handbook of environmental chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Language: Английский
Bioresource Technology, Journal Year: 2025, Volume and Issue: 425, P. 132332 - 132332
Published: March 2, 2025
Language: Английский
Citations
0
Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116068 - 116068
Published: March 1, 2025
Language: Английский
Citations
0
Water, Journal Year: 2024, Volume and Issue: 16(19), P. 2824 - 2824
Published: Oct. 4, 2024
The challenge of microcontaminants (MCs) in wastewater effluent has been addressed by using different technologies, including advanced oxidation processes (AOPs) and adsorption. This work evaluates the benefits synergies combining these two processes. AOPs were photo-Fenton UV/H2O2 operated under natural pH but with reagents dosages, lamps, chelating agents. Chelating agents used at analytical (ethylenediamine-N,N-disuccinic acid citric acid) technical grade (citric to simulate scaling-up conditions. adsorption process was studied via granular activated carbon (GAC) filtration fresh regenerated GAC. Four AOP scenarios selected coupled GAC filtration, showing for both treatment time decreased from 10–15 min 5 min, resulting a reduction energy consumption between 50 66%. In process, it possible low reagent dosages (1.5 mg L−1 iron 20 H2O2). However, use showed close removal, highlighting as real alternative. An extension lifetime up 11 times obtained all scenarios, being higher than Furthermore, toxicity phytotoxicity treated evaluated, no acute or slight variation observed combination
Language: Английский
Citations
1
Journal of Korean Society of Environmental Engineers, Journal Year: 2024, Volume and Issue: 46(11), P. 695 - 704
Published: Nov. 22, 2024
Objectives : This study aimed to evaluate the removal efficiency of trace organic contaminants (TrOCs) in UVbased advanced oxidation processes (AOPs) as an alternative post-ozonation process a drinking water treatment plant (DWTP) downstream Nakdong River. The results are expected be utilized basic data for modernizing aging facilities.Methods Eight organophosphorus flame retardants (OPFRs), known their persistence and resistance degradation, were selected target TrOCs evaluating ozonation UV-based AOPs. Experiments conducted using sand-filtered from DWTP River, with OPFRs spiked into sample matrix. Lab-scale experiments AOPs (UV, UV/H<sub>2</sub>O<sub>2</sub>, UV/Cl<sub>2</sub>) performed, concentrations analyzed stir bar sorptive extraction (SBSE) system, followed by GC-MS/MS.Results Discussion second-order rate constants (<i>k</i><sub>OH</sub>) reaction OH radicals estimated group contribution method ranged 1.4(±0.6)×10<sup>9</sup> 1.8(±0.1)×10<sup>10</sup> M<sup>⁻1</sup> s<sup>⁻1</sup>, depending on structural characteristics. In process, Cl-containing aliphatic was not effective, likely due electron-withdrawing effects -Cl groups, which inhibited reactivity both ozone radicals. However, non-Cl-containing aromatic OPFRs, more than 90% achieved at specific dose 1.5 mgO<sub>3</sub>/mgDOC. AOPs, showed poor 5~35% UV fluence 1,000 mJ/cm<sup>2</sup> under direct photolysis. presence oxidants (H<sub>2</sub>O<sub>2</sub> or free available chlorine), UV/H<sub>2</sub>O<sub>2</sub> up 89% increase efficiency, UV/Cl<sub>2</sub> exhibited 49% increase. difference patterns between is attributed reactive chlorine species OPFRs. For photolysis high enough efficiencies 90~98% mJ/cm<sup>2</sup>. These demonstrate potential UV/H2O2 effective particularly low process.Conclusion comparative evaluation confirmed efficient promise treatments during treatment.
Language: Английский
Citations
0
The handbook of environmental chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Language: Английский
Citations
0