摘要
以硫酸亚铁(Fe SO_(4)·7H_(2)O)和红茶渣为原料,采用限氧高温热解技术制备了系列磁性生物炭(Fe-BC_(0.72)、Fe-BC_(0.55)、Fe-BC_(0.25))并将其用于活化过二硫酸盐(PS)降解罗丹明B(Rh B)。考察了Fe_(3)O_(4)(Fe)与生物炭(BC)的质量比、Fe-BC投加量、过硫酸钾用量、溶液p H、温度等参数对BC-Fe活化PS降解Rh B效果的影响。结果表明,当Fe_(3)O_(4)与生物炭(BC)的质量比为0.55、Fe-BC用量为0.021 3 g、PS用量为0.030 2 g,p H为5、反应温度为30℃时Fe-BC_(0.55)对Rh B (40 mg·L^(-1))的降解效果最佳,反应90 min时的降解率为98.8%。将Fe-BC_(0.55)磁性分离、循环使用5次,对Rh B的降解率为75%。
Series of magnetic biochar (Fe-BC_(0.72),Fe-BC_(0.55) and Fe-BC_(0.25)) were prepared by solid-phase grinding coupled with pyrolysis of ferrous sulfate and red tea residue.The effects of mass ratio of Fe_(3)O_(4) and BC,Fe-BC and persulfate (PS) dosages,solution p H and temperature on rhodanine B(Rh B) degradation were investigated in the system of Fe-BC and PS.The results showed that the degradation rate of Rh B was ideal as the mass ratio of Fe_(3)O_(4) and BC was 0.55,Fe-BC_(0.55) dosage was 0.021 3 g and PS mass was 0.030 2 g at p H5 and the reaction temperature of 30℃.The degradation rate of Rh B was 98.8%at the reaction time of 90 min.The degradation rate of Rh B was 75% after BC-Fe_(0.55) was recycled for 5 times via magnetic separation.
作者
吴永娟
马青春
刘博
WU Yongjuan;MA Qingchun;LIU Bo(School of Chemistry&Chemical Engineering,Shaanxi Xueqian Normal University,Xi'an 710100;Fire Safety Engineering,Safe College,Xi’an University of Science and Technology,Xi’an 710054)
出处
《安徽农业大学学报》
CAS
CSCD
2022年第6期955-960,共6页
Journal of Anhui Agricultural University
基金
陕西省自然科学基金项目(2016JM2018)
国家自然科学基金(51904233)共同资助。
