水力空化联合Fenton/Fenton-Fe氧化降解苯酚废水  

Combined Processes of Hydrodynamic Cavitation and Fenton/Fenton-Fe Oxidation for Phenol Degradation in Wastewater

作　　者：陈锐杰 孙国龙 曹玉琴 崔少琦 贺琼琼[4] CHEN Ruijie;SUN Guolong;CAO Yuqin;CUI Shaoqi;HE Qiongqiong(School of Materials and Physics,China University of Mining and Technology,Xuzhou 211116,China;School of Chemical Engineering,China University of Mining and Technology,Xuzhou 211116,China;School of Safety,China University of Mining and Technology,Xuzhou 211116,China;National Engineering Research Center of Coal Processing and Purification,China University of Mining and Technology,Xuzhou 211116,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州211116 [2]中国矿业大学化工学院,江苏徐州211116 [3]中国矿业大学安全学院,江苏徐州211116 [4]中国矿业大学国家煤加工与洁净化工程技术研究中心,江苏徐州211116

出　　处：《净水技术》2022年第7期90-98,共9页Water Purification Technology

基　　金：国家自然科学基金(51704291,51774285);江苏省自然科学基金(BK20170284);国家级大学生创新训练项目(202010290080Z)。

摘　　要：微纳气泡与高级氧化技术联合对有机废水进行降解,可在提高活性氧传质效率的同时强化废水微纳气泡界面反应。文章研究了一种采用水力空化(HC)协同Fenton试剂联用纳米铁粉降解苯酚废水的方法,设计了单独Fenton氧化与HC联用的工艺参数,并对Fenton氧化、HC、HC-Fenton以及掺入纳米铁粉的动力学过程进行探究。试验结果表明:在处理时间为60 min、pH值为3、30%H_(2)O_(2)投加量为0.6 mL、FeSO_(4)·7H_(2)O投加量为0.20 g时,采用HC-Fenton氧化处理500 mL质量浓度为120 mg/L的苯酚溶液,苯酚和COD_(Cr)的降解率为84.54%和88.13%。减少50%的FeSO_(4)·7H_(2)O用量,加入相同摩尔比的纳米铁粉,对Fe^(3+)具有还原作用,促使Fenton试剂的循环使用,加强了与HC作用的时间,苯酚和COD_(Cr)的降解率分别达到98.67%和99.34%。动力学研究表明,苯酚的降解过程符合一级反应,其中HC-Fenton的增强因子为1.78,HC-Fenton-Fe增强因子为2.29,可认为HC对于高级氧化技术的提高具有显著影响。Micro-nano bubbles and advanced oxidation technology are combined to degrade organic wastewater,which could enhance the interface reaction of wastewater with micro-nano bubbles while improving the mass transfer efficiency of active oxygen.In this paper,a method of degrading phenol wastewater by hydrodynamic cavitation(HC)and Fenton reagent combined with nanometer iron powder was studied.The process parameters for the combined process of Fenton oxidation and HC were designed,the kinetic process of Fenton oxidation, HC, HC-Fenton and iron nanoparticle doped were studied. The experimental results showed that, when the treatment time was 60 min, the pH value was 3, the 30% H_(2)O_(2) added amount was 0. 6 mL, and the FeSO_(4)·7H_(2)O added amount was 0. 20 g, 500 mL phenol solution with 120 mg/ L was treated by HC-Fenton oxidation, the degradation rates of phenol and COD_(Cr) was 84. 54% and 88. 13%. When the dosage of FeSO_(4)·7H_(2)O was reduced by 50% and nano-iron powder with the same molar ratio was added, Fe^(3+) could be reduced, which promoted the recycling of Fenton reagent and enhances the time of HC. The degradation rates of phenol and COD_(Cr) could reach 98. 67% and 99. 34%, respectively. Kinetic studies showed that the degradation process of phenol conforms to the first order reaction, in which the enhancement factor of HC-Fenton is 1. 78 and the enhancement factor of HC-Fenton-Fe is 2. 29. It could be considered that HC has a significant impact on the improvement of advanced oxidation technology.

关 键 词：水力空化 FENTON 苯酚 纳米铁粉 联合降解 

分 类 号：X703[环境科学与工程—环境工程] TQ09[化学工程]