油葵茎秆生物炭结构特征及对吡啶的吸附性能  

Structural Feature and Pyridine Adsorption of Biochar Derived from the Stem of Oil Sunflower

作　　者：汪怀建[1] 喻成龙 谭璐 吴依婷 姚金贵 杨海君[2] WANG Huaijian;YU Chenglong;TAN Lu;WU Yiting;YAO Jingui;YANG Haijun(School of Resource and Environment,Jiangxi Agricultural University,Nanchang 330045,China;Hunan Agricultural University,Changsha 410128,China;Jiangxi Defu Environmental Protection Technology Development Company Limited,Leping 3300,China)

机构地区：[1]江西农业大学国土资源与环境学院,江西南昌330045 [2]湖南农业大学,湖南长沙410128 [3]江西德孚环保科技发展有限公司,江西乐平33300

出　　处：《环境科学与技术》2022年第7期161-168,共8页Environmental Science & Technology

基　　金：江西省主要学科学术和技术带头人培养计划青年项目(20212BCJL23054);国家自然科学基金项目(52160009)。

摘　　要：文章以油葵茎秆为原材料,采用缺氧升温热解法制备300、400、500、600、650℃的生物炭,利用FTIR、SEM、BET对生物炭进行表征,结果发现,随炭化温度升高,生物炭的含氧官能团数减少,比表面积增大,孔隙结构更加丰富。在650℃制备的生物炭具有最丰富的孔隙结构,比表面积最大,达到321.7307 m^(2)/g。吡啶吸附实验结果表明,650℃制备的生物炭(Y650)的吸附性能最佳,吡啶饱和吸附量达到33.64 mg/g。相同条件下,H_(2)SO_(4)改性油葵茎秆后制备的生物炭(YS650)对吡啶的饱和吸附量提高了6%,达到35.66 mg/g。Y650和YS650对吡啶的吸附结果表明,当吡啶初始浓度100 mg/L、生物炭添加量4 g/L、pH=7,吸附12 h后,Y650和YS650对吡啶的吸附达到平衡,饱和吸附率分别达到67.29%和73.35%。FTIR,SEM and BET were used to investigate the structural feature of biochar derived from the stem of oil sunflower under hypoxia conditions at five pyrolysis temperatures(300,400,500,600 and 650℃)and its pyridine adsorption.The results showed that the increasing of carbonization temperature decreased the number of oxygen-containing functional groups of biochar,but increased the specific surface area and the pore structure.The biochar prepared at 650℃has the most abundant pore structure and the largest specific surface area,reaching 321.7307 m^(2)/g.Pyridine adsorption experiment results showed that the biochar(Y650)prepared at 650℃had the best adsorption performance,and the pyridine adsorption capacity reached 33.64 mg/g.Under the same conditions,the adsorption capacity of the oil sunflower stem biochar(YS650)modified with H_(2)SO_(4)was increased by 6%,reached 35.66 mg/g.The results showed that when initial pyridine concentration was 100 mg/L,biochar content was 4 g/L,and pH was 7,after 12 hours of adsorption,the adsorption of pyridine on Y650 and YS650 reached equilibrium,and the saturated adsorption rates were respectively reached 67.29%and 73.35%.

关 键 词：油葵茎秆 生物炭 H_(2)SO_(4)改性 吡啶 吸附性能 

分 类 号：X703[环境科学与工程—环境工程]