Electron Beam Technology Coupled to Fenton Oxidation for Advanced Treatment of Dyeing Wastewater: from Laboratory to Full Application

Abstract

This study developed a novel electron beam (EB) and Fenton process (FP) for the advanced treatment of dyeing wastewater by combining EB radiation with the FP. In the presence of 0.1 mM Fe­(II) and 0.1 mM H2O2, the mineralization efficiency of Rhodamine B was 59.21% at a dose of 2 kGy, which is higher than single EB radiation and the FP, due to the interaction of hydrated electron with Fe­(II) and H2O2, hydrated electron enhanced the activation of H2O2 and the conversion from Fe­(III) to Fe­(II) in the EB radiation process. For the actual dyeing wastewater with 255 mg/L COD and 150 times color, the COD decreased to 52 mg/L, and the color decreased to 10 times after EB & FP treatment. In addition, EB & FP was used as an advanced treatment process in practical application to treat the dyeing wastewater from a knitting factory and showed satisfactory performance. The treatment cost of EB & FP was estimated to be 1.5 ¥ per ton wastewater. In summary, EB & FP possesses strong oxidation capacity and low operational cost with the maximum treatment capacity of 5000 m3 per day per electron accelerator, which could provide a solution for the treatment of recalcitrant dyeing wastewater.

Electron Beam Radiation Coupled to the Reverse Osmosis Membrane Process for Advanced Treatment of Coking Wastewater

“…Electron beam technology, as an ionizing radiation technology, is a new type of advanced oxidation process. , Compared to the conventional advanced oxidation process, ionizing radiation has its own characteristics, such as no demand of chemicals and short process time . Many studies in a laboratory scale have demonstrated that ionizing radiation can remove recalcitrant organic pollutants in the wastewater via the direct action of high energy and the indirect action of reactive species produced by the radiolysis of water molecules (dominant). ,, In addition to laboratory studies, our research group has established full-scale application projects of industrial wastewater treatment including the advanced treatment unit of electron beam irradiation.…”

“…The sole ionizing radiation process as an advanced treatment process usually required a high adsorbed dose that resulted in the increase in treatment cost. The combination of ionizing radiation with the conventional wastewater treatment process could be a way to decrease the adsorbed dose and to simultaneously enhance the removal capacity . The common combined processes have some limitations.…”

Degradation of herbicide atrazine in water by high voltage electrical discharge in comparison with Fenton oxidation and ultrasound treatments

“…12 The degradation of residual atrazine is thus becoming an urgent issue for environmental protection, especially for water security which is listed as a priority by the "European Green Deal" proposed by the European Commission. The degradation of chemically stable atrazine is challenging, and common water treatment technologies are limited by trace organic concentrations 13 and strict fouling control, 14 so there have been increasing efforts to develop efficient advanced oxidation processes, 3 such as Fenton/Fenton-like oxidation, [15][16][17] ultrasound [18][19][20] and so on. Among them, high voltage electrical discharge (HVED) has attracted more attention because of its advantages, high degradation efficiency and environmental friendliness.…”

Treatment of hospital wastewater by electron beam technology: Removal of COD, pathogenic bacteria and viruses

“…Our research group at Tsinghua University, cooperated with China Guangdong Nuclear Group, successfully researched and developed the electron accelerator and radiation reactor for wastewater treatment, and realized the first application of electron beam technology for the treatment of dyeing wastewater in Jinghua City, Zhejiang Province, in 2016, and established the largest wastewater treatment facility using electron beam technology for the advanced treatment of dyeing wastewater in the world in Jiangmen City, Guangdong Province, in 2019 ( Wang and Wang, 2022a , Wang and Wang, 2022b ). Electron beam technology showed good performance in practical application ( Wang et al, 2022 ).…”