摘要
以葡萄糖、丙烯酰胺为原料,过硫酸钾为引发剂,一步水热法合成了酰胺化碳微球(HTC-AM),并利用红外光谱、扫描电镜进行表征,同时研究了HTC-AM对铀的吸附性能。结果表明:温度298.15K,pH=5.0,吸附平衡时间150min时,HTC-AM达到最大的吸附能力,HTC-AM的吸附量由32.72mg/g提高到244.3mg/g,对铀的吸附符合准二级动力学模型、Langmuir吸附等温模型。说明HTC-AM可以作为高效的吸附剂用以除去水中的铀。
Amidate modified hydrothermal carbon spheres were synthesized by one step hydrothermal method using glucose and acrylamide as raw materials, potassium persulfate as evocator which were characterized by FT-IR and SEM. The materials were applied for the adsorption of uranium ions. The effects of pH, temperature, time and initial U( Ⅵ ) concentrations on the adsorption capacity were studied including the adsorption isotherm and thermodynamics. The HTC- AM showed the highest uranium sorption capacity at initial pH of 5.0 ,contact time of 150min and temperature 298. 15K. The adsorption of U( Ⅵ ) was remarkably improved after the amidation. The maximum adsorption capacity of HTC-AM for U( Ⅵ) was 244.3mg/g,much higher than that of HTC(32.72mg/g). The adsorptions of U(Ⅵ ) from aqueous solution on HTC-AM were fitted to the Langmuir adsorption isotherms. The kinetic data corresponded well to the pseudo second order equation. HTC AM was a promising sorbent for the efficient removal of U(Ⅵ) from aqueous solutions. Key words amidation,hydrothermal carbon sphere,adsorption,U(Ⅵ)
作者
王晓明
刘方毅
姜向民
Wang Xiaoming Liu Fangyi Jiang Xiangmin(No. 912 Team,Jiangxi Bureau of Geology and Mineral Exploration and Development, Yingtan 335001 Unit 94968 of PLA,Nanjing 211100)
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第10期130-133,共4页
New Chemical Materials
关键词
酰胺化
碳微球
吸附
铀(Ⅵ)
amidation, hydrothermal carbon sphere, adsorption, U( Ⅵ )