摘要
以废弃稻壳为原料,采用高温煅烧并利用硼酸改性,成功制备了具有高吸附和催化性能的硼掺杂改性稻壳生物炭(BBC),并活化过硫酸盐(PMS)实现对水中四环素(TC)的高效降解,在120 min内对TC的降解率达到88.2%,同时对BBC的表面结构进行表征,探究不同因素对TC降解的影响。结果表明,BBC/PMS体系对TC的降解性能在一定范围内随PMS和BBC投加量升高呈上升趋势,随pH(pH=3~11)的升高呈先升高后降低的趋势,BBC表现出良好的循环利用性能。BBC/PMS体系降解TC的过程中,自由基途径(SO_(4)^(-)·、O_(2)^(-)·、·OH)与非自由基途径(^(1)O_(2))结合导致TC降解,O_(2)^(-)·和^(1)O_(2)是主要的活性氧(ROS),对TC的降解起主导作用。
Using waste rice husk as raw materials,boron doped rice husk biochar(BBC)with high adsorption and catalytic properties was successfully prepared by calcination at high temperature and modified by boric acid method.In this work,BBC showed excellent performance in the degradation of tetracycline(TC)from water by activated persulfate(PMS),with the degradation rate of TC reaching 88.2%in 120 min.The surface structure of BBC were characterized,and the effects of different factors on TC degradation were investigated.The results showed that the degradation performance of TC in the BBC/PMS system showed an upward trend with the increasing dosage of PMS and BBC within a certain range,and a trend of first increasing and then decreasing with the increase of pH(pH=3-11).BBC exhibited good recycling performance.In the process of TC degradation by BBC/PMS system,free radical pathway(SO_(4)^(-)·,O_(2)^(-)·,·OH)combined with non-free radical pathway(^(1)O_(2))resulted in the TC degradation.O_(2)^(-)·and^(1)O_(2)were the main reactive oxygen species(ROS)and played a dominating role during the degradation of TC.
作者
秦芳
严玉清
秦晶
白国枫
郝瑾
王会利
QIN Fang;YAN Yu-qing;QIN Jing(School of Chemical Safety,North China Institute of Science and Technology,Langfang,Hebei 065201;Key Laboratory of Environmental Biotechnology,RCEES,CAS,Beijing 100085)
出处
《安徽农业科学》
2025年第6期74-79,共6页
Journal of Anhui Agricultural Sciences
基金
廊坊市科技局项目(2022013072)
中国科学院生态环境研究中心环境生物技术重点实验室开放基金项目(kf2021004)
中央高校基本科研业务费(3142015009)。
关键词
四环素
过硫酸盐
生物炭
催化降解
硼掺杂
Tetracycline
Persulfate
Biochar
Catalytic degradation
Boron doping
