羟基氧化镍催化臭氧氧化水中草酸  

Catalytic Ozonation of Oxalic Acid in Water with Nickel Oxyhydroxide(NiOOH)

作　　者：罗梦玉 黄宇 姜杰文 黄远星[1] 穆岩 Luo Mengyu;Huang Yu;Jiang Jiewen;Huang Yuanxing;Mu Yan(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Hebei province Environmental Monitoring Center,Shijiazhuang 050056,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]河北省环境监测中心站,河北石家庄050056

出　　处：《净水技术》2018年第3期71-76,共6页Water Purification Technology

基　　金：上海市教育委员会科技创新项目(15ZZ075)

摘　　要：本试验采用过硫酸钾作为氧化剂,氢氧化镍为原料,利用液相氧化法制备羟基氧化镍,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、傅里叶红外变换光谱(FT-IR)以及热重分析(TGA)对制得产品的理化性质进行分析。采用催化臭氧试验,并控制单一变量,考察羟基氧化镍作为催化剂对草酸的臭氧氧化去除效果,探究不同条件下草酸的去除率,研究了催化剂投加量、臭氧浓度、pH对草酸去除效果的影响。结果表明:与单独臭氧氧化相比,催化臭氧法可以大大提高草酸去除率,反应遵循羟基自由基机理,当催化剂投加量为100 mg/L、臭氧浓度为12.2 mg/L、pH值为3.4时,60 min内草酸去除率最高可以达到92%。Nickel oxyhydroxide is prepared by liquid phase oxidation by use of K2S2O8and NiOOH as the oxidant and raw material respectively.The characterization of the product is determined by XRD,SEM,Fourier transform infrared spectroscopy and thermogravimetric analysis,and the catalytic performance is investigated in ozonation of oxalic acid.The effects of catalyst dosage,ozone concentration and pH value on the removal of oxalic acid are studied.The results show that nickel oxyhydroxide catalyst enables an interesting improvement of ozonation efficiency during the degradation of oxalic acid compared with ozone alone,and the catalytic ozonation system follows a hydroxyl radical mechanism.The maximum degradation of oxalic acid can reach92%in60min when100mg/L catalytic is added with the ozone concentration of9.0mg/L and pH value of3.4.

关 键 词：羟基氧化镍 草酸 催化臭氧氧化 

分 类 号：X52[环境科学与工程—环境工程]