高效大气汞脱除的秸秆生物质炭性能研究  

Study on the Performance of Straw Biomass Charcoal for High Efficiency Atmospheric Mercury Removal

作　　者：竹涛[1] 韩一伟 张星 高子竣 刘亚涛 刘海兵 ZHU Tao;HAN Yiwei;ZHANG Xing;GAO Zijun;LIU Yatao;LIU Haibing(Institute of Atmospheric Environmental Management and Pollution Control, China University of Mining & Technology (Beijing), Beijing 100083, China;Ministry of Environmental Protection Solid Waste and Chemicals Management Technology Center, Beijing 100029, China)

机构地区：[1]中国矿业大学(北京)大气环境管理与污染控制研究所,北京100083 [2]生态环境部固体废物与化学品管理技术中心,北京100029

出　　处：《太原理工大学学报》2020年第5期697-705,共9页Journal of Taiyuan University of Technology

基　　金：山西省揭榜项目(20191101007);中央高校基本科研业务费专项(2009QH03)。

摘　　要：采用水稻秸秆作为原料制备生物质炭,利用AgNO3和KI对其改性处理,通过设计正交试验考察反应温度、载气流量和生物质炭用量对Hg^0吸附性能的影响,以此优化试验条件,最后结合吸附动力学研究生物质炭对Hg^0的吸附机理。结果表明:使用AgNO3、KI溶液对生物质炭改性处理后,生物质炭的孔隙结构发生明显改变,平均孔径、总孔容和中孔孔容均有所增大,物理吸附能力得以提高;生物质炭吸附Hg^0最佳工况条件是反应温度为40℃,载气流量为1.5 L/min,生物质炭用量为2.0 g;经2.0 mg/mL KI溶液改性得到的生物质炭Hg^0吸附量显著增加,达到2.498 mg/g.In this paper,biomass charcoal was prepared with rice straw as raw material to remove mercury from the atmosphere.Then the biomass charcoal was modified with AgNO3 and KI solution.In order to optimize the experimental conditions,the effects of reaction temperature,carrier gas flow rate,and biomass charcoal dosage on the adsorption performance of Hg^0 were investigated through the designed orthogonal tests.Finally,the adsorption mechanism of biomass charcoal towards Hg^0 was studied on the basis of the adsorption dynamics.The experimental results show that the pore structure of the biomass charcoal changed significantly after modification with AgNO3 and KI solution.The average pore diameter,total pore volume,and mesoporous pore volume increased and the physical adsorption capacity was improved.The optimal conditions of the biomass charcoal for Hg^0 adsorption were the reaction temperature of 40℃,the carrier gas flow rate of 1.5 L/min,and the biomass charcoal dosage of 2.0 g.The Hg^0 adsorption capacity of the biomass charcoal modified by 2.0 mg/mL KI solution increased significantly,reached 2.498 mg/g.

关 键 词：生物质炭 AGNO3 KI 改性 Hg0吸附性能 

分 类 号：X703[环境科学与工程—环境工程]