Fe_(3)O_(4)/MWCNTs湿式催化降解PVA废水  

Degradation of PVA Wastewater by Fe_(3)O_(4)/MWCNTs with Catalytic Wet Oxidation

作　　者：张玥 朱高峰 葛明桥 ZHANG Yue;ZHU Gaofeng;GE Mingqiao(Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学,江苏无锡214122

出　　处：《塑料》2022年第5期141-146,共6页Plastics

基　　金：江南大学研究生科研与实践创新计划(JNKY19_033)。

摘　　要：通过共沉淀法将Fe_(3)O_(4)负载到多壁碳纳米管中,制备Fe_(3)O_(4)/MWCNTs纳米材料。通过X射线衍射仪(XRD)、透射电子显微镜(TEM)、X射线能谱仪(EDS)、N_(2)物理吸附仪和傅里叶红外光谱仪(FTIR)对样品的结构、形貌和表面性能进行了表征。结果表明,Fe_(3)O_(4)成功负载到MWCNTs表面,并且表现出良好的分散性和均一性。在等号pH=2.5、催化剂添加量为1.5 g/L、反应温度为275℃、氧气压力为1.0 MPa条件下,将Fe_(3)O_(4)/MWCNTs纳米材料作为催化剂,采用湿式氧化法降解质量浓度为2%的PVA废水,反应120 min后,降解率为93.6%,黏均分子量降低了99.0%,溶液中的大分子酚、醛和酮类等物质被氧化为相对分子质量较小的酸类物质等,实现了对PVA废水的降解。Fe_(3)O_(4)/MWCNTs nanomaterials were prepared with co-precipitation method by loading Fe_(3)O_(4)into MWCNTs.The structure,morphology and surface properties of the samples were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),Energy dispersive spectrometer(EDS),N_(2) physical adsorption instrument(BET)and Fourier transform infrared spectrometer(FTIR).The experimental results showed that the metal oxides were successfully loaded onto the surface of MWCNTs and exhibit good dispersion and homogeneity.At pH was 2.5,the catalyst amount was 1.5 g/L,the reaction temperature was 275℃and the oxygen pressure was 1.0 MPa,Using Fe_(3)O_(4)/MWCNTs nanomaterials as catalyst,PVA wastewater with mass concentration of 2%was degraded by catalytic wet oxidation for 120 min,the PVA degradation rate was 93.6%,the viscosity average molecular weight was reduced by 99.0%,the macromolecules such as phenols,aldehydes and ketones were oxidized into smaller molecular weight acids,the degradation of PVA wastewater was realized.

关 键 词：PVA废水 湿式催化氧化法 金属氧化物 负载型催化剂 PVA降解率 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]