摘要
通过响应面分析法优化制备螯合树脂,提高其转化率,探究反应条件之间的交互作用。将螯合树脂作为吸附材料对水中汞离子进行实验研究,考察吸附pH、共存离子、吸附温度对饱和吸附容量的影响,利用红外光谱(FTIR)和热重分析仪(TGA)进行表征。研究表明螯合树脂对汞离子的最佳吸附pH=6.0,308 K下饱和吸附量为382.5 mg·g^(-1)。吸附为化学吸附,过程遵循二级动力学模型。2mol·L^(-1)盐酸溶液进行解吸,解吸率达到100%。吸附和解吸实验表明3-AT-R螯合树脂对汞离子的吸附具有高选择性、高吸附性、高洗脱率。
The conversion of 3-AT-R cheating resin was optimized by response surface method and effects of different reaction conditions were studied. Moreover, mercury adsorption and desorption properties of the 3-AT-R resin were investigated, and factors including pH, ions and temperature on mercury adsorption were studied via FTIR and TGA. The results show that the maximum saturated adsorption capacity is 382.5 mg·g^-1 under pH = 6.0 and 308 K. The adsorption kinetic and equilibrium data were well fitted with the pseudo-second-order model. Desorption studies reveal that mercury ion can be effectively eluted using 2 mol？L-1 HCl and the desorption efficiency is 100%. These results show that the 3-AT-R chelating resin have advantages of high selectivity, adsorption and elution efficiency for mercury ion.
作者
熊春华
蔡晓敏
徐银荣
朱敏亮
吴舒怡
饶明菲
王彦波
XIONG Chun-hua;CAI Xiao-min;XU Yin-rong;ZHU Min-liang;WU Shu-yi;RAO Ming-fei;WANG Yan-bo(Department of Applied Chemistry,Zhejiang Gongshang University,Hangzhou 310018,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2018年第5期1054-1062,共9页
Journal of Chemical Engineering of Chinese Universities
基金
浙江省重点研发计划项目(2017C03049)
浙江省公益技术应用研究计划项目(2017C31103
LGN18C200013)
关键词
吸附
解吸
汞
动力学模型
3-AT-R
饱和吸附量
adsorption
desorption
mercury
kinetic modeling
3-AT-R
saturated adsorption capacity
