Abstract
To enhance the generation of hydrogen peroxide (H2O2), a modified graphite felt cathode doped with nitrogen and boron was developed and used in peroxi-coagulation system to degrade dimethyl phthalate (DMP). After a simple modification method, the yield of H2O2 on cathode increased from 9.39 to 152.8 mg/L, with current efficiency increased from 1.61 to 70.3%. Complete degradation of DMP and 80% removal of TOC were achieved within 2 h at the optimal condition with pH of 5, cathodic potential of − 0.69 V (vs. SCE), oxygen aeration, and electrode gap of 1 cm. Possible mechanism with synergistic effect of electro-Fenton and electrocoagulation process in the peroxi-coagulation system was revealed via quenching experiments. The prospect of this system in the effluent of landfill leachate and domestic sewage was studied, achieving 50% and 61% of DMP removal in 2 h. This efficient system with simple modified cathode had promising prospects in practical applications.
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The authors acknowledged the support from Open Project of State Key Laboratory of Urban Water Resource and Environment (QA201926), China Postdoctoral Science Foundation funded projects (2017M611373), Fundamental Research Funds for the Central Universities (HIT. NSRIF. 201858), and the Nature Science Foundation of Heilongjiang (E2017047).
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Ding, J., Dong, L., Geng, Y. et al. Modification of graphite felt doped with nitrogen and boron for enhanced removal of dimethyl phthalate in peroxi-coagulation system and mechanisms. Environ Sci Pollut Res 27, 18810–18821 (2020). https://doi.org/10.1007/s11356-020-08384-1
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DOI: https://doi.org/10.1007/s11356-020-08384-1