摘要
研究氨基淀粉(CAS)、二硫代氨基改性淀粉(DTCS)、壳聚糖(CTS)、二硫代氨基改性壳聚糖(DTC-CTS)4种吸附剂对铜、铅、锌3种重金属离子的吸附性能,应用吸附等温式考察4种吸附剂对重金属的吸附选择性。结果表明,对于4种吸附剂,Langmuir-Freundlich等温式的计算结果与试验结果可以较好地吻合,与单因素Langmuir等温式的计算结果联合,可以预计多组分体系的吸附选择性,从而在实际工艺中可以大大节省试验步骤。
The adsorption performances of four adsorbents, CAS, DTCS, CTS and DTC-CTS for heavy metals （Cu, Pb, Zn） are investigated, and the selectivity of adsorbents for heavy metal ions is determined by isothermal adsorption equations. The results show that the calculation results by Langmuir-Freundlich isothermal equation are well fitted with the experimental data for the four adsorbents. Associating with the calculated results by Langmuir isothermal equation, the selectivity of adsorbents in the actual process of multi-metal-ion system can be predicted by the Langmuir-Freundlich isothermal equation, therefore much experiment can be saved.
出处
《有色金属》
CAS
CSCD
北大核心
2007年第1期77-80,共4页
Nonferrous Metals
基金
国家自然科学基金资助项目(20577034)
关键词
冶金技术
吸附
重金属
吸附等温式
选择性
metallurgical technology
adsorption
heavy metals
isothermal adsorption equation
selectivity
