Study on the Treatment of Organic Wastewater Containing Low Concentration Heavy Metal Ions by Zero-Valent Iron Fenton-like Process
1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China;
3. College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
Abstract：The organic wastewater containing low concentration heavy metal ions was treated by zero valent iron Fenton method. The effects of initial pH value, H2O2 dosage, reaction time and iron shavings dosage on the experiment were studied, and the mechanism of this method in removing chemical oxygen demand (COD) and metal ions was explored. The experimental results showed that the removal rates of COD, Cu2+, Ni2+ and Pb2+ in wastewater by this method were 71%, 98%, 97% and 98% respectively, under the conditions of pH value 3, H2O2 dosage 1.5 mL/L, reaction time 60 min and iron shavings dosage 30 g/L, and the removal effect was better than that of traditional Fenton method. After the iron shavings were reused for 5 times, the removal rates of COD and Cu2+ were still more than 60% and 88% respectively, which showed that the reuse is very good. In summary, it can be concluded that the zero-valent iron Fenton process has a good application prospect in the treatment of this wastewater.
ZOU Yachen1,JIA Xiaoning1,RAN Lang2 et al. Study on the Treatment of Organic Wastewater Containing Low Concentration Heavy Metal Ions by Zero-Valent Iron Fenton-like Process[J]. 化学反应工程与工艺, 2021, 37(2): 167-174.
