改性活性半焦吸附-Fe/C微电解-Fenton联用技术处理焦化废水

Modified active semi-coke adsorption-Fe/C micro-electrolysis-Fenton technology to treat coking wastewater

采用改性活性半焦吸附-Fe/C微电解-Fenton联用技术处理焦化废水,探究联用技术工艺参数对焦化废水化学需氧量(COD)去除率的影响,结果表明:(1)针对Fe/C微电解处理焦化废水的最佳操作条件为:pH=3,Fe与C质量比2. 0∶1,Fe/C投加量30 g·L^(-1),反应时间60 min,反应温度35℃;(2)采用Fe/C微电解-Fenton氧化处理焦化废水最佳操作条件为:过氧化氢投加量25 m L·L^(-1),pH=3,Fe与C质量比2. 0∶1,Fe/C投加量30 g·L^(-1),反应时间8 h。在最佳吸附-Fe/C-Fenton联用工艺条件下操作,对焦化废水COD降解率达到85. 23%,COD由199. 27 mg·L^(-1)降至29. 43 mg·L^(-1)。动力学研究表明,动力学方程能很好的拟合Fe/C微电解降解过程。

The coking wastewater was treated by modified active semi-coke adsorption-Fe/C micro-electrolysis-Fenton technology. Effects of process parameters on COD removal of coking wastewater were explored. Results showed that:( 1) the optimal operating conditions for Fe/C micro-electrolysis treatment of coking wastewater were pH = 3,m( Fe) : m( C) = 2. 0∶ 1,Fe/C dosage of 30 g·L-1,reaction time of 60 min,reaction temperature of 35 ℃;( 2) the optimum operation conditions for the coking wastewater treatment with Fe/C micro-electrolysis-Fenton oxidation were 25 m L·L-1 of H2O2,pH =3,m( Fe) : m( C) =2. 0∶ 1,Fe/C dosage 30 g·L-1,reaction time 8 h. Under optimal reaction conditions,COD degradation of the coking wastewater reached 85. 23%,and COD decreased from 199. 27 mg · L-1 to 29. 43 mg · L-1.Kinetic studies showed that kinetic equations could well fit the Fe/C microelectrolysis degradation process.