摘要
通过碳基催化剂活化过硫酸盐技术具有高效、可控、选择性活化等特点。但目前已有的碳基材料(以碳纳米管、石墨烯、金刚石为主)大部分制备条件苛刻、工艺复杂、不易规模化生产、环境应用费用高昂且性能有待进一步提升。生物炭因制备简单、成本低、具有可调节的比表面积和大量的表面官能团而在环境催化领域备受关注。本研究以牛骨粉和乙磺酸钠盐为原料,通过高温煅烧法成功制备N掺杂牛骨粉生物质炭(BBCN_(0.005)),牛骨粉由动物鲜骨制作,其含有胶原蛋白、碳含量高、含磷丰富,为提高催化性能提供了充足的碳源和天然掺杂元素。采用多种表征手段对BBC-N0.005的理化性质进行分析,并将其用于活化过一硫酸盐(PMS)以降解苯酚,同时探究不同因素对苯酚降解效果的影响及其降解机理。结果表明:当N掺杂质量比仅为0.005时,BBCN_(0.005)/PMS体系在30 min内即可实现苯酚的有效去除;该体系在pH为3.00~11.00范围内降解率均可达到80%以上,具有良好的pH适用范围。BBC-N0.005/PMS体系中主要活性物种为SO_(4)^(·-)、•OH和^(1)O_(2),BBC-N0.005表面的吡啶氮和石墨氮是活化PMS的主要活性位点。
The activation of persulfate by carbon-based catalyst has the characteristics of high efficiency,controllable and selective activation,and so on.However,most of the existing carbon-based materials(mainly carbon nanotubes,graphene and diamond)have harsh preparation conditions,complex processes,difficulty in large-scale production,high environmental application costs and performances need to be further improved.Biochar has attracted much attention in the field of environmental catalysis because of its simple preparation,low cost,adjustable specific surface area and large number of surface functional groups.N-doped bovine bone meal biochar(BBC-N_(0.005))was prepared by high temperature calcination using bovine bone meal and sodium ethanesulfate as raw materials.Bovine bone meal was made from fresh animal bone,which contained collagen,high carbon content,rich phosphorus content,and provided sufficient carbon source and natural doping element for improving catalytic performance.The physicochemical properties of BBC-N_(0.005) were analyzed by various characterization methods,and it was used to activate peroxymonosulfate(PMS)to degrade phenol.Meanwhile,the effects of different factors on the degradation of phenol and its degradation mechanism were investigated.The results showed that when N-doping mass ratio was only 0.005,BBC-N_(0.005)/PMS could effectively remove phenol within 30 minutes.The degradation rate of the system could reach more than 80%in the pH range of 3 to 11,which had a good pH application range.The main active species in BBC-N_(0.005)/PMS system were SO_(4)^(·-),•OH and ^(1)O_(2),and the pyridine nitrogen and graphite nitrogen on the surface of BBC-N_(0.005) were the main active sites for activating PMS.
作者
孟娜
秦传玉
张成武
张慧
辛思怡
赵薇
赵妍
MENG Na;QIN Chuanyu;ZHANG Chengwu;ZHANG Hui;XIN Siyi;ZHAO Wei;ZHAO Yan(School of Chemistry and Environmental Engineering,Changchun University of Science and Technology,Changchun Jilin 130022;Key Laboratory of Groundwater Resources and Environment,Ministry of Education,National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology,Jilin Provincial Key Laboratory of Water Resources and Environment,Jilin University,Changchun Jilin 130021)
出处
《环境卫生工程》
2025年第2期28-37,共10页
Environmental Sanitation Engineering
基金
国家自然基金面上项目(42177049)。
关键词
改性牛骨粉
生物炭
过硫酸盐
活化
降解性能
modified beef bone powder
biochar
persulfate
activation
degradation performance
