摘要
本文以农业废弃物玉米芯为前驱体,以KOH为活化剂制备了玉米芯基生物炭(Biochar,BC),并用此吸附水中的磺胺二甲基嘧啶(Sulfamethazine,SMT)。实验表明,玉米芯和KOH的质量比为1:3、活化温度为700℃时制备的生物炭吸附SMT的效果最佳。当投加量为0.08 g/L,初始浓度为50 mg/L,pH值为5.0时,SMT的吸附率为81.4%,吸附容量高达544.6 mg/g。Langmuir吸附模型和二级动力学模型更适合描述BC对SMT的吸附过程,表明吸附过程为基于单分子层的化学吸附。本研究阐明了利用废弃玉米芯制备吸附剂的潜力,体现了“以废治废”的理念,为磺胺类抗生素废水的处理提供了新的思路。
In this paper,corn cob-based biochar(BC)was prepared from agricultural waste corn cob as a precursor and KOH as an activator,and this was used to adsorb sulfadimethoxine(SMT)in water.The experiments showed that the best adsorption performance of the prepared biochar was achieved when the mass ratio of corn cob and KOH was 1:3 and the activation temperature was 700℃.When the dosage was 0.08 g/L,the initial concentration was 50 mg/L,and the pH was 5.0,the adsorption rate of SMT was 81.4%,and the adsorption capacity was up to 544.6 mg/g.Langmuir adsorption model and second-order kinetic model showed that the adsorption of SMT on biochar was a monolayer-based chemical adsorption.This study demonstrated the potential of using waste corn cobs to prepare adsorbents,embodied the concept of"waste for waste",and provides a new idea for the treatment of sulfonamide antibiotic wastewater.
作者
安琪
张良波
程俊
刘睿
李鑫
候新映
An Qi;Zhang Liangbo;Cheng Jun;Liu Rui;Li Xin;Hou Xinying(College of Environmental Engineering,Henan University of Technology,Henan,450001)
出处
《当代化工研究》
CAS
2024年第20期173-175,共3页
Modern Chemical Research
