摘要
以花生壳、木屑这些天然纤维材料制备吸附剂吸附废水中的四环素类抗生素,通过探讨改性剂种类、改性剂用量、改性时间等因素对吸附效果的影响,筛选出最佳吸附材料并优化改性方案。实验结果表明,两种吸附剂对抗生素废水均有较高的吸附效率,其中碱改性花生壳的吸附效果最好,最佳改性方案为1 mol·L-1NaOH室温下改性5 h,对3种四环素类抗生素的去除率分别为土霉素67.27%、四环素79.08%、强力霉素87.40%。同时,利用傅立叶红外光谱(FTIR)和扫描电镜(SEM)对碱改性花生壳结构特性进行表征,推断碱改性花生壳中对吸附抗生素起主要作用的官能团是C-O基团。
Natural fibers such as peanut hull and sawdust were used to prepare adsorbents for adsorbing tetracycline antibiotics (oxytetracy- cline, tetracycline and doxycycline ) from simulated wastewater. The influence factors of preparing adsorbents including the type and dosage of modifier and treating time were systematically studied. The surface and structure of prepared adsorbents were characterized using Fourier Transform infrared spectroscopy (FFIR) and scanning electron microscope (SEM). The results showed that the peanut hull modified by 1 mol" L-I NaOH for 5 h was the optimum adsorbent for removal of tetracycline antibiotics. The removal efficiencies for oxytetracycline, tetra- cycline and doxycycline were 67.27%, 79.08% and 87.40% by modified peanut hull, respectively. Also, it was found that the high content of C-O groups in surface of modified peanut hull made a significant contribution to the adsorption of three tetracycline antibiotics.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第10期2061-2065,共5页
Journal of Agro-Environment Science
基金
国家水体污染控制与治理科技重大专项(2008ZX07101-006-05)
关键词
花生壳
四环素类抗生素
吸附
peanut hull
tetracycline antibiotics
adsorption