本文關(guān)鍵詞： 非均相催化 降解 脫毒 過氧化氫異丙苯 二氧化錳 動力學(xué)　出處：《環(huán)境科學(xué)研究》2016年09期 　論文類型：期刊論文

【摘要】：為消除廢水中CHP(過氧化氫異丙苯)對廢水生物處理系統(tǒng)的不利影響,篩選出MnO_2為適合催化CHP降解脫毒的非均相催化劑,并以MnO_2為催化劑,催化降解自配廢水中的CHP,采用間歇試驗(yàn)考察了反應(yīng)pH、溫度、MnO_2投加量、初始ρ(CHP)對CHP去除效果的影響,對CHP降解動力學(xué)進(jìn)行了分析,同時對處理前后廢水組分和生物毒性做了鑒定.結(jié)果表明:CHP催化降解速率與溫度、初始ρ(CHP)和ρ(MnO_2)呈正相關(guān);pH為4~10,溫度為50~70℃,ρ(MnO_2)為10~20 g/L是較為優(yōu)化的反應(yīng)條件.MnO_2催化降解CHP的反應(yīng)符合表面反應(yīng)機(jī)制,催化劑表面接觸面積越大,CHP降解速率越快;在pH為2或3時,CHP降解速率顯著高于pH為4~10時,但Mn溶出較為顯著.在初始ρ(CHP)為0.4~1.0 g/L時,CHP催化降解反應(yīng)遵循一級反應(yīng)動力學(xué),符合Arrhenius方程,Ea(表觀活化能)為37.56 k J/mol.反應(yīng)產(chǎn)物主要為2-苯基-2-丙醇,處理后廢水的OUR(耗氧速率)抑制率由63%降為0,對活性污泥沒有抑制.
[Abstract]:In order to eliminate the adverse effect of CHP (cumene hydroperoxide) on wastewater biological treatment system, MnO_2 was selected as a heterogeneous catalyst suitable for catalytic CHP degradation and detoxification. MnO_2 was used as catalyst to catalyze the degradation of CHP in self-made wastewater. The pH of the reaction and the dosage of MNO _ 2 were investigated by batch test. The effect of initial 蟻 (Ch) on the removal efficiency of CHP was studied, and the degradation kinetics of CHP was analyzed. At the same time, the composition and biotoxicity of wastewater before and after treatment were identified. The results showed that the catalytic degradation rate of 1: CHP was positively correlated with temperature, initial 蟻 (CHP) and 蟻 (MNO _ 2). The pH is 4 ~ 10 and the temperature is 50 ~ 70 鈩，

本文編號：1459337