改性磁铁矿/H_2O_2非均相类Fenton体系催化降解橙黄Ⅱ的研究  

A study on catalytic degradation of Orange Ⅱ by modified magnetite/H_2O_2 heterogeneous Fenton-like system

作　　者：荆王松 王长智[2] 梅荣武[2] 史惠祥[1] 徐峰 JING Wangsong;WANG Changzhi;MEI Rongwu;SHI Huixiang;XU Feng(College of Environmental and Resources,Zhejiang University,Hangzhou 310027,China;Environmental Science Research&Design Institute of Zhejiang Province,Hangzhou 310007,China;Jiaxing Green Environment Engineering Co.,Ltd,Jiaxing 314000,Zhejiang Province,China)

机构地区：[1]浙江大学环境与资源学院,浙江杭州310058 [2]浙江省环境保护科学设计研究院,浙江杭州310007 [3]嘉兴市绿野环境工程有限公司,浙江嘉兴314000

出　　处：《浙江大学学报（理学版）》2018年第4期461-467,共7页Journal of Zhejiang University（Science Edition）

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07206-002).

摘　　要：为了提高非均相类Fenton体系的催化效率,采用浓硫酸对磁铁矿粉进行表面改性,得到改性磁铁矿(M-Fe_3O_4).探究以M-Fe_3O_4为催化剂的非均相类Fenton体系对橙黄Ⅱ的氧化降解效果,并考察M-Fe_3O_4投加量、H_2O_2投加量、反应初始pH值等因素对橙黄Ⅱ脱色率和TOC去除率的影响.XRD、TEM和FT-IR表征结果表明,表面改性后M-Fe_3O_4粒径减小,比表面积增加,且表面覆盖硫酸铁混盐等活性组分.与磁铁矿/H_2O_2和FeSO_4/H_2O_2两体系相比,M-Fe_3O_4/H_2O_2非均相类Fenton体系对橙黄Ⅱ(初始浓度为500mg·L^(-1))的降解效率明显提升.在最佳反应条件(pH=6,M-Fe_3O_4投加量为0.25g·L^(-1),H_2O_2投加量为4mL·L^(-1))下,橙黄Ⅱ脱色率达到92%,TOC去除率达到47%,为实际废水处理应用提供了实验支撑.In order to enhance the catalyst efficiency of heterogeneous Fenton-like system,magnetite is activated by H2SO4 to obtain modified Fe3O4(M-Fe3O4).The catalyst activity is evaluated by degradation on Orange II in the heterogeneous Fenton system.The effect of M-Fe3O4 dosages,H2O2 dosages and initial pH are also evaluated.XRD,TEM and FT-IR results showed that after modification,the M-Fe3O4 particle size is reduced while the specific surface area is increased,the surface of catalyst is covered with iron sulfate salts.Compared with magnetite/H2O2 and FeSO4/H2O2 system,M-Fe3O4/H2O2 Fenton system has a higher efficiency on degradation of Orange II(concentration of 500 mg·L-1).Under optimum conditions:pH=6,0.25 g·L-1 M-Fe3O4,4 mL·L-1 H2O2,92%discoloration and 47%degradation of TOC are achieved,which provides an experimental support for further practical wastewater treatment.

关 键 词：改性 磁铁矿 非均相类Fenton 降解 橙黄II 

分 类 号：X788[环境科学与工程—环境工程] X791