摘要
在水稻秸秆基铁氮掺杂生物炭粉末催化剂的基础上,制备了多级孔铁氮掺杂生物炭成型固体催化剂,探讨了其成型工艺,对其进行了表征,并对其活化过硫酸盐降解有机污染物的性能进行了评价,为铁氮掺杂生物炭催化剂的工业放大提供参考。该方法制备的成型球体催化剂具有良好的力学性能、丰富的多级孔结构、极低的铁离子浸出,可在宽pH范围内有效去除实际废水COD以及三氯苯酚(TCP)、双酚A(BPA)等有机污染物,可通过浸渍和热处理再生。吸附60 min、降解100 min后,COD、TCP、BPA的去除率分别可达46.85%、63.62%、90.18%。Fe^(2+)、Fe^(0)能够活化过硫酸盐产生·OH、SO_(4)^(-)·、·O_(2)^(-)和^(1)O_(2)降解有机污染物,Fe—N、C=O、O=C—OH和π→π^(*)位点作为电子供体,氧化态N作为电子受体。
On the basis of rice straw-based iron and nitrogen-doped biochar powder catalysts,solidiron and nitrogen-doped biochar catalysts with multistage pores were prepared,and their shaping process was explored and characterized.In addition,their ability to degrade organic pollutants by activating persulfate was evaluated,which provideda reference for the industrial scaling-up of the iron and nitrogen-doped biochar catalysts.The spherical catalysts prepared by this method had good mechanical properties,rich multistage pore structure,and extremely low iron ion leaching.It could effectively remove the COD of real wastewater in a wide pH range,as well as organic pollutants,such as trichlorophenol(TCP)and bisphenol A(BPA).It could be regenerated by impregnation and heat treatment.After 60 min of adsorption and 100 min of degradation,the removal rates of COD,TCP,and BPA could reach 46.85%,63.62%,and 90.18%,respectively.Fe^(2+)and Fe^(0)were able to activate persulfate to produce·OH,SO_(4)^(-)·,·O_(2)^(-),and ^(1)O_(2)to degrade the organic pollutants,with Fe—N,C=O,O=C—OH,andπ→π^(*)sites as electron donors and oxidation state N as electron acceptor.
作者
林逸宁
葛强
万金泉
朱丛韵
王艳
周贤波
刘宽勇
刘和芳
LIN Yining;GE Qiang;WAN Jinquan;ZHU Congyun;WANG Yan;ZHOU Xianbo;LIU Kuanyong;LIU Hefang(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;China CEC Engineering Corporation,Changsha 410114,China;State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China;Guizhou Pengsheng(Group)Paper Co.,Ltd.,Qianxinan 552401,China)
出处
《化工环保》
CAS
CSCD
北大核心
2024年第4期546-553,共8页
Environmental Protection of Chemical Industry
基金
广东省自然科学基金项目(2023A1515011186)。
关键词
铁氮掺杂生物炭
催化剂成型
过硫酸盐高级氧化
造孔
iron and nitrogen-doped biochar
catalyst molding
persulfate advanced O_(x)idation
pore making
