摘要
以松木屑为原料制备水热炭,并以不同浓度磷酸二氢铵作为活化剂对所制备的水热炭进行改性;通过傅里叶红外光谱、SEM、元素分析等表征所得水热炭。结果显示低浓度活化剂改性水热炭表面积增大,表面含氮官能团增多。探究不同溶液中pH、投加量、吸附时间、溶液初始浓度对水热炭吸附性的影响。结果表明,5%磷酸二氢铵改性水热炭单位吸附量>10%改性水热炭>未改性水热炭;吸附动力学和吸附等温线结果表明,3种吸附剂吸附过程均遵循二阶动力学模型,表明其吸附过程均为化学吸附;同时Langmuir模型能够更好地描述3种吸附剂的吸附过程。
Hydrothermal carbon was prepared from pine sawdust,and the hydrothermal carbon prepared was modified with NH_(4)PO_(3) of different concentrations as the activator;Characterize the obtained hydrothermal charcoal by FTIR,SEM,elemental analysis,etc.The results show that the surface area of the hydrothermal carbon modified with low concentration of activator increases,and the surface contains nitrogen functional groups.Explore the effects of pH,dosing amount,adsorption equilibrium time,and initial solution concentration in different solutions on the adsorption performance of hydrothermal charcoal.The experimental results show that the adsorption capacity is NBC_(5%)>NBC_(10%)>BC.Adsorption kinetics and adsorption isotherm results show that the adsorption processes of the three adsorbents all follow the second-order kinetic model and Langmuir model.
作者
王曦
何苑静
许威
段佳男
李登新
WANG Xi;HE Yuan-jing;XU Wei;DUAN Jia-nan;LI Deng-xin(School of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;National Environmental Protection Textile Pollution Prevention Engineering Technology Center,Donghua University,Shanghai 201620,China;State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 201620,China;Shanghai Institute of Pollution Control and Ecological Safety,Shanghai 201620,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第2期290-294,323,共6页
Applied Chemical Industry
基金
国家自然科学基金钢铁联合基金(U1660107)
上海市生态环境局资助项目(沪环科[2019]第10号)
中央高校基本科研业务费专项资金资助(2232020A-10)。
关键词
氨基化
水热炭
Cr(Ⅵ)
吸附
amination
hydrothermal carbon
Cr(Ⅵ)
adsorption
