Abstract：The green advanced oxidation process of Fe0-Al0/O2 enhanced by ethylenediamine disuccinic acid (EDDS) was applied to generating reactive oxygen species (ROS) of H2O2 and ·OH by the O2 spontaneous reduction at normal temperature and pressure. The simulated 4-CP wastewater was degraded in this study. The effects of the initial pH, the mass ratio of Fe0 to Al0, the EDDS dosage and initial 4-CP concentration were investigated in the process. The insitu -generation of H2O2 and ·OH as well as the oxidative mechanism of 4-CP degradation were proved by electron spin resonance (ESR), benzoic capturing, oxygen stripping and 4-CP degradation products. The results show that 4-CP degradation efficiency in the Fe0-Al0/O2 system enhanced by EDDS decreases with the initial pH increasing and remains pleasurable in the pH range of 2.5~9. With the mass ratio of Fe0 and Al0 increasing, the removal rate of 4-CP increases first and then decreases, and the best mass ratio of Fe0 to Al0 was 4:1. The removal rate of 4-CP increases with EDDS dosage and the initial 4-CP concentration. EDDS was found to have improved 4-CP removal rate by 9times. The complete 4-CP removal and dechlorination were achieved within 3h at nitial pH of 2.5, EDDS dosage of 1.5mmol/L, Fe0:Al0 (w:w) of 4:1and initial 4-CP concentration of 4-CP of 100mg/L.
刘霞, 樊金红. EDDS强化Fe0-Al0体系降解废水中4-氯酚的性能和机理[J]. 中国环境科学, 2018, 38(5): 1704-1711.
LIU Xia, FAN jin-hong. Enhanced bimetallic Fe0-Al0/O2 system by EDDS for degradation of aqueous 4-CP. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1704-1711.
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