文档介绍：
载银离子交换树脂π络合吸附萘的研究#
5
10
15
20
25
30
摘要:采用批量实验法研究了大孔阳离子交换树脂 Amberlyst 15 负载银离子前后对萘和 1,3-
二氯苯的吸附行为. 结果表明,在实验所研究的浓度范围内 Amberlyst 15 负载银离子后对萘
的表观吸附平衡分配系数 Kd 值有显著增加, 而对 1,3-二氯苯的的 Kd 值影响甚微. 除范德华
力外,载银 Amberlyst 15 的银离子空轨道能与π供体有机物萘之间产生了阳离子-π键络合作
用,其化学络合能量强于范德华力,进而促进了对萘的吸附; 而 1,3-二氯苯为非π供体有机物,
载银处理未能对其吸附产生显著影响. 载银 Amberlyst 15 作为一种π络合吸附剂,可为探索
开发水环境中π供体有机污染物的去除技术提供重要技术参考.
关键词:环境科学;吸附;π络合;载银 Amberlyst 15;萘;
中图分类号:X52
Adsorption of naphthalene by Ag ions-exchanged resins via
plexation
Abstract: Adsorption behaviors of naphthalene and 1,3-dichlorobenzene to macro-porous cation
exchange resin Amberlyst 15 before and after exchanged with silver ions were evaluated using
batch experiments. Results showed that, within the concentration range of this experiment, the
apparent sorption distribution coefficient Kd of naphthalene were significantly enhanced after
Amberlyst 15 exchanged with silver ions, while the influence on 1,3-dichlorobenzene was
negligible. Besides of the van der Waals forces, the silver ions loaded Amberlyst 15 could
supply empty track to interact with π-donor naphthalene via cation-plexation, in which
energy is stronger than the van der Waals force, lead to the adsorption enhancement of
naphthalene;
Whereas, for non-π-donor, the adsorption of 1,3-dichlorobenzene could not able to
have a significant influence after Amberlyst 15 excha