脱水污泥基铁炭复合材料用于光Fenton催化降解有机污染物  

Dewatered sludge derived iron-carbon composite as a photo-Fenton catalyst for organic pollutant degradation

作　　者：王文刚 陶红[1] 戴晓虎[2] WANG Wengang;TAO Hong;DAI Xiaohu(School of Environment and Architecture,Shanghai University of Science and Technology,Shanghai 200093,China;Engineering Center,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]同济大学环境科学与工程学院,上海200092

出　　处：《环境工程学报》2020年第8期2232-2241,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51679140);上海市大学生创新项目(SH2019141)。

摘　　要：为实现市政脱水污泥资源化并达到简化制备工艺、节省试剂的目的,采用提前掺杂铁盐的方式一步热解制备铁炭复合催化材料。首先,固定温度为850℃,探究铁盐的最佳掺杂量;随后,固定铁盐掺杂比,对其制备温度进行优化。实验共制备了8种材料,选取其中4种代表性材料做XRD、FT-IR、SEM等表征,并选取催化效果最佳的材料探究其可循环性及其在不同pH下对罗丹明B和对硝基苯酚的去除效果。结果表明:铁盐与干污泥的质量比为1∶1、焙烧温度为750℃条件下制备材料的催化效果最佳;材料表面形成了具有一定孔隙和花型片状结构,而且存在多种含铁化合物;在pH=7的条件下,对罗丹明B、对硝基苯酚的降解率分别可达88.6%和97.5%。这表明,该材料具有良好的催化性能及宽广的pH适用范围。铁炭复合材料经5次循环使用后,罗丹明B的降解率仍然可达到93.7%,该材料具有较好的稳定性能。In order to recycle municipal dehydrated sludge and achieve the purpose of simplifying the preparation process and saving reagents,iron-carbon composite catalytic materials were prepared by one-step pyrolysis with iron salt doping in advance.Firstly,the optimal doping amount of iron salt was explored at the fixed temperature of 850℃.Then,the preparation temperature was optimized at fixed iron salt doping ratio.Eight materials were prepared in the experiment,among which four representative materials were selected for XRD,FTIR,SEM and other characterization.The materials with the best catalytic effect were selected to explore their recyclability and the removal effects of RhB and p-nitrophenol at different pHs.The results showed that the composite with the best catalytic effect were prepared at the iron salt-sludge ratio of 1∶1 and the calcination temperature of 750℃,which had certain pores,flaky structure and various iron compounds.At neutral pH of 7,the degradation rates of RhB and p-nitrophenol were 88.6%and 97.5%,respectively.After five cycles,the degradation rate of RhB still reached 93.7%.This indicates that the material has a wide range of pH applications,good catalytic properties and good stability.

关 键 词：脱水污泥 铁改性 生物炭 FENTON 光催化 有机污染物降解 

分 类 号：X705[环境科学与工程—环境工程]