花生壳生物炭负载铁酸锰活化过硫酸钠降解罗丹明B  

Magnetic Biochar Activated Persulfate Degradation of Rhodamine B

作　　者：曹寿清 张亮[2] 张金爽 潘思佳 CAO Shouqing;ZHANG Liang;ZHANG Jinshuang;PAN Sijia(Lijiang Fisheries Technology Extension Center,Lijiang 674100 China;School of Ecology and Environmental Science,Yunnan University,Kunming 650500 China;School of Environment and Energy Engineering Beijing,University of Civil Engineering and Architecture,Beijing 100044 China)

机构地区：[1]云南省丽江市水产技术推广站,云南丽江674100 [2]云南大学生态与环境学院,云南昆明650500 [3]北京建筑大学环境与能源工程学院,北京100044

出　　处：《西华大学学报(自然科学版)》2025年第2期38-47,105,共11页Journal of Xihua University:Natural Science Edition

基　　金：云南省科技厅重点研发计划项目(202303AC100018)。

摘　　要：以农业废弃物花生壳为原料,通过高温煅烧–共沉淀法制备了可磁分离回收的MnFe2O4@生物炭(MBC),并对MBC的形貌和结构进行表征。采用MBC活化过硫酸钠(SPS)降解罗丹明B(RhB),探究了MBC投加量、SPS浓度、溶液初始pH值、共存离子等对RhB降解率的影响,并考察了MBC的重复利用性能。研究结果表明:在RhB初始质量浓度为10 mg/L,溶液初始pH值为6.50,MBC投加量为0.4 g/L,SPS浓度为2.0 mmol/L时,RhB降解率在120 min时达到93.2%;RhB降解率随MBC投加量和SPS浓度增加而提高,并在较宽的pH范围(1~7)内具有较高降解率,腐殖酸、Cl–、HCO3–对RhB的降解具有一定抑制作用;MBC的饱和磁化强度为5.28 emu/g,表明其易于磁回收;MBC具有较好的磁性和稳定性,经过3次循环后,RhB降解率仍达到73.8%。The magnetic separation and recovery of MnFe2O4@biochar(MBC)was prepared from agricultural waste peanut shell by high-temperature calcination and co-precipitation method,and the morphology and structure of MBC were characterized and analyzed.Rhodamine B(RhB)was degraded by MBC activated sodium persulfate(SPS).The effects of MBC dosage,SPS concentration,initial pH value of solution and co-existing ions on RhB degradation rate were investigated,and the reuse performance of MBC was also investigated.The results show that when the initial concentration of RhB is 10 mg/L,the initial pH value of the solution is 6.50,the MBC dosage is 0.4 g/L,and the SPS concentration is 2.0 mmol/L,the degradation rate of RhB reaches 93.2%in 120 minutes.Its degradation rate increases with the increase of MBC dosage and SPS concentration,and has a higher degradation rate at lower pH values(1-7).Humic acid,Cl-,and HCO3-have a certain inhibitory effect on the degradation of RhB.The saturation magnetization of MBC is 5.28 emu/g,indicating that it is easy to magnetic recovery.MBC has good magnetism and stability,and after three cycles,the RhB degradation rate can still reach 73.8%.

关 键 词：磁性生物炭 过硫酸盐 罗丹明B 催化降解 高级氧化技术 

分 类 号：X703[环境科学与工程—环境工程]