BiPO4光催化高效利用H2O2处理含硫脲光伏废水  

BiPO4 Photocatalytic Application in Thiourea-containing Photovoltaic Wastewater Treatment by using H2O2 Efficiently

作　　者：魏志恺 何义亮[1] WEI Zhikai;HE Yiliang(School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China)

机构地区：[1]上海交通大学环境科学与工程学院

出　　处：《水处理技术》2019年第6期70-73,84,共5页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07206001)

摘　　要：为提高O3/H2O2类芬顿法预处理完全去除光伏废水中硫脲(转变成二氧化硫脲和三聚氰胺)后残留的H2O2利用率,进一步降低废水TOC含量,研究采用回流法制备了BiPO4纳米棒光催化剂。结果表明,在BiPO4的投加量0.5 g/L、辐照度4.73 mW/cm2的紫外光照射下,可以在60 min内将O3/H2O2处理后剩余的74.47 mg/L的H2O2完全利用,TOC的质量浓度进一步降低了30.88 mg/L。而TiO2/UV和UV的H2O2利用速率仅为BiPO4/UV的一半,TOC去除量分别仅为1.25 mg/L和9.875 mg/L。回流法制备Bi PO4可以在常压、低温条件下大量生产,且处理废水前后其结构没有明显变化,表面也没有有机物的附着,可在该类废水中多次重复利用。In order to improve the utilization ratio of H2O2 after the removal of thiourea (transformed into thiourea dioxide and melamine) from photovoltaic wastewater by O3/H2O2 Fenton pretreatment, and further reduced the TOC content of wastewater, BiPO4 nanorod photocatalyst was prepared by reflux method. The results showed that the remaining 74.47 mg/L of H2O2 after O3/H2O2 treatment could be fully utilized within 60 minutes under the ultraviolet irradiation of 4.73 mW/cm2 with BiPO4 dosage of 0.5 g/L. The mass concentration of TOC was further reduced by 30.88 mg/L. The H2O2 utilization rate ofTiO2/UV and UV was only half of that ofBiPO4/UV, and the removal rate of TOC was only 1.25 mg/L and 9.875 mg/L, respectively. BiPO4 prepared by reflux method could be produced in large quantities at atmospheric pressure and low temperature, and its structure had not changed significantly before and after treatment of wastewater, and there was no organic attachment on the surface, so it could be reused in this kind of wastewater for many times.

关 键 词：BiPO4光催化剂 O3/H2O2 协同作用 硫脲 

分 类 号：X703.1[环境科学与工程—环境工程]