EDTA-粉煤灰/H_2O_2体系处理模拟制革废水的试验研究

Experiment on treating simulative tannery wastewater with EDTA-Fly Ash/H_2O_2 system

通过实验以及动力学分析表明用配体的引入对体系进行改进,提高了基于粉煤灰的多相类Fenton体系对模拟制革废水的去除效果,同时得到EDTA-粉煤灰/H2O2体系降解模拟制革废水的最佳反应条件:在室温下,反应pH值为10,初始COD值为110.8 mg/L,过氧化氢浓度为200.4 mg/L,EDTA的浓度为250 mmol/L,粉煤灰投加量为10 g/L的情况下,COD和色度的去除率都在95%以上,粉煤灰在多次使用后,COD去除率均达到97%以上。

Through the experiments and dynamic analysis showed the introduction of ligands improve,enhance the system's removal efficiency of tannery wastewater treatment which based on the fly ash of Fenton-like system.Meanwhile,obtained the optimal reaction conditions by EDTA-fly ash/H2O2 system to degrade and simulate the tannery wastewater as follows: At room temperature,the reaction pH value is 10,the initial COD value is 110.8mg/L,the hydrogen peroxide concentrations is 200.4mg/L,the concentration of EDTA is 250mmol/L,the dosing quantity of fly ash is 10 g/L,under these conditions the removal rate of COD and coloring are all above 95%.After useing of fly ash repeatly,the removal rate of COD has reached above 97%.