净水污泥负载Fe_(3)O_(4)对亚甲基蓝的催化降解研究  

Catalytic degradation study of methylene blue by drinking water treatment residues loaded with Fe_(3)O_(4)

作　　者：钟宇 陈荣升 陈浩宇 王东田[1,2] ZHONG Yu;CHEN Rongsheng;CHEN Haoyu;WANG Dongtian(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;School of Chemistry and Life Sciences,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技大学化学与生命科学学院,苏州215009

出　　处：《给水排水》2023年第5期83-92,共10页Water & Wastewater Engineering

基　　金：国家自然科学基金项目(51778392)。

摘　　要：净水污泥(WTR)具有类似粘土的孔隙结构,可用于制备吸附剂。构建H-WTR@Fe_(3)O_(4)/HA/H_(2)O_(2)的类芬顿体系对有机污染物进行降解研究。以亚甲基蓝(MB)为目标污染物,通过羟胺(HA)促进H-WTR@Fe_(3)O_(4)表面Fe(Ⅱ)/Fe(Ⅲ)的循环。利用扫描电子显微镜(SEM),全自动比表面及孔隙度分析仪(BET)、X射线衍射(XRD)、傅里叶红外光谱仪(FTIR)、X射线能谱(XPS),对催化剂进行了表征,并通过降解实验测试其催化性能。研究了初始pH、H_(2)O_(2)和HA剂量对MB去除率的影响,分析了HA的作用机理。重复利用试验表明,经过5次重复利用后,体系仍然可以在60 min内对MB的降解率达到90.86%。Drinking water treatment residues(WTR)have clay-like pore structure and can be used to prepare adsorbents.In this study,a Fenton-like system of H-WTR@Fe_(3)O_(4)/HA/H_(2)O_(2)was constructed to study the degradation of organic pollutants.Methylene blue(MB)was used as the target pollutant,and the cycling of Fe(Ⅱ)/Fe(Ⅲ)on the surface of H-WTR@Fe_(3)O_(4)was promoted by hydroxylamine(HA).The catalysts were characterized by scanning electron microscopy(SEM),fully automated specific surface and porosity analyzer(BET),X-ray diffraction(XRD),Fourier infrared spectroscopy(FTIR),and X-ray energy spectroscopy(XPS),and their catalytic performance was tested by degradation experiments.The effects of initial pH,H_(2)O_(2)and HA dosage on the MB removal rate were investigated,and the mechanism of the effect of HA was analyzed.The reuse experiments showed that the system could still achieve 90.86%degradation of MB within 60 min after five reuses.

关 键 词：净水污泥 羟胺 Fe(Ⅱ)/Fe(Ⅲ)循环 类芬顿体系 亚甲基蓝 

分 类 号：TU991[建筑科学—市政工程]