摘要
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Fenton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>H2O2投加量。结果表明,在100 ml水样中,室温条件下,初始pH值为4.0,催化剂使用量为1.5 g,H2O2投加量为5 ml(分两次投加),反应时间为90 min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10倍;COD浓度38.5 mg/L;氨氮浓度8.4 mg/L,达到国家一级排放标准。
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.
出处
《环境科学与管理》
CAS
2013年第6期98-102,共5页
Environmental Science and Management
