介孔生物炭的合成、改性及其对染料的吸附性能研究  

Preparation and Modification of Mesoporous Biochar and Adsorption Properties for Dyes

作　　者：何红艳 邹思佳 HE Hong-yan;ZOU Si-jia(College of Resources and Environment,A Ba Teachers University,A Ba 623002,China)

机构地区：[1]阿坝师范学院资源与环境学院,四川阿坝623002

出　　处：《化学试剂》2020年第10期1148-1153,共6页Chemical Reagents

基　　金：阿坝师范学院校级课题项目(ASB18-01)。

摘　　要：以菠萝叶子为原材料,磷酸作活化剂,通过热处理合成介孔生物炭,再利用十六烷基三甲基溴化铵进行改性,采用扫描电镜、比表面积测试和傅里叶转换红外光谱表征改性前后材料的结构,研究其作为吸附剂处理染料废水的性能。室温下,藏红T的初始浓度150 mg/L,pH 11,吸附时间50 min,未改性吸附剂投加量0.6 g/L,去除率和吸附量分别达到96.33%和234.1 mg/g。胭脂红的吸附实验中,当初始浓度100 mg/L,pH 2,吸附时间50 min,改性吸附剂投加量0.5 g/L,去除率95.17%,吸附量为194.8 mg/g。分析数据表明,改性前后材料吸附染料的过程符合拟二级动力学模型和Langmuir等温线模型。With Pineapple leaves as biomass source and H3PO4 as an active agent,mesoporous biochar was synthesized by heat treatment,and then modified by hexadecyltrimethyl ammonium bromide(CTAB).The structure of the material before and after modification was confirmed by SEM,BET and FT-IR.Meanwhile,the adsorption properties of sample were investigated for dye wastewater treatment.The results showed that,at room temperature,when the initial mass concentration of safranine T was 150 mg/L,pH 11,the adsorption time was 50 min and the dosage of mesoporous biochar was 0.6 g/L,the safranine T removal rate and adsorption capacity were presented about 96.33%and 234.1 mg/g.In the adsorption experiment of carmine,when the initial concentration was 100 mg/L,pH 2,the adsorption time was 50 min,the dosage of modified adsorbent was 0.5 g/L,the adsorption removal rate and adsorption capacity reached 95.17%and 194.8 mg/g,respectively.Based on the analysis data,the adsorption processes of dye waste water were in accordance with the pseudo-second-order kinetic model and Langmuir isotherm model.

关 键 词：菠萝叶子 H3PO4 介孔结构 藏红T 胭脂红 

分 类 号：X703[环境科学与工程—环境工程] TQ127.1[化学工程—无机化工]