非均相类Fenton试剂的制备及其在焦化废水处理中的应用研究

利用浸渍法，将Fe3＋负载在经酸碱改性后的粉状活性炭上，当浸渍液浓度为2．5％，固化温度为270℃时，制成的催化剂催化活性较高。用自制的非均相类benton试剂降解焦化废水，通过正交试验和极差分析得出，影响因素的主次顺序为催化剂用量〉初始pH值〉反应时间〉H：0：投加量。结果表明，在100ml水样中。室温条件下，初始pH值为4．0，催化剂使用量为1．5g，H20：投加量为5ml（分两次投加），反应时间为90min时，COD去除率可达99％。采用混凝＋化学沉淀＋非均相类Fenton试剂法处理焦化废水，各主要出水水质指标为：色度lO倍；COD浓度38．5mg／L；氨氮浓度8．4mg／L，达到国家一级排放标准。

Preparation of Heterogeneous Fenton-type Reagent and Its Application in Coking Wastewater Treatment

The catalyst has more activity when Fe3＋ is supported on powdered activated carbon modified by acid and alkali with steeping, under the reaction condition of FeC13 of 2. 5%, curing temperature of 270℃. A home -made heterogeneous Fenton - type reagent is introduced in coking wastewater treatment. The orthogonal method and range analysis were adopted to study the order of influencing priorities. Result shows ： catalyst volume 〉 1. initial pH 〉 1. reaction time 〉 1. H2O2 volume. When 100 mil- liliter eoking wastewater is treated at the room temperature, the removal efficiency of COD reached 99% under the treatment con- dition of pH value 4. 0, catalyst volume 1.5 g, H2O2 volume 5 ml （ added in 2 times） and reaction time 90 min. Coking wastewater were treated with coagulation, chemical precipitation and heterogeneous Fenton reagents. The major water quality inde- xes all reached the national emission standard 1, with chroma of 10 times, COD value 38.5 mg/L, and NH3 - N value 8.4 mg/L.