【摘要】 采用Ｆｅｎｔｏｎ试剂预处理低浓度难降解的Ｈ酸废水,探讨了ｐＨ,Ｆｅ２＋,Ｈ２Ｏ２,反应时间和Ｈ酸浓度对废水ＣＯＤＣｒ去除效果的影响．结果表明,各因素对废水ＣＯＤＣｒ去除效果影响较大,对ＣＯＤＣｒ为８１０ｍｇ·ｌ－１的Ｈ酸废水,Ｆｅｎｔｏｎ试剂预处理的最佳条件:ｐＨ为５．５,３%Ｈ２Ｏ２的投加量为５%,１０ｇ·ｌ－１ＦｅＳＯ４的投加量为７%,反应时间为９０ｍｉｎ,此条件下 ＣＯＤＣｒ去除率为５５．３%－５８７%,可生化值 ＣＯＤＢ/ＣＯＤＣｒ从 ６．３%－６．７%上升到６２．２%－６８．４%．更多还原

【Abstract】 The pretreatment of refractory H-acid wastewater with the low CODCr value by Fenton’s reagent has been studied in this paper. It is discussed for the effect factors of pH, Fe2+ , H2O2, reaction time and H-acid concentration on the removal efficiency of CODCr. The results show that the optimal operating conditions of pretreatment by Fenton’s reagent are as follows: the optimum pH value for CODCr removal is 5.5 ; the suitable dose of 3% of H2O2 and 10g·l-1 of FeSO4 is 5% and 7% respectively; the suitable reaction time is 90min under the condition of CODCr 810mg·l-1 for H-acid wastewater. Under these conditions, the removal efficiency of CODCr is 55.3%?8.7%, the biodegradable value CODB/CODCr increases from 6.3%-6.7% to 62.2%-68.4% .更多还原