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·1600· 精细化工 FINE CHEMICALS 第 35 卷

Freundlich 等温吸附模型，由此判断其吸附过程十分 和吸附量为 267.38 mg/g。AM/AO/NIPA 循环使用 4
2+
复杂，吸附剂可能既有表面上的单分子层吸附，又 次后，其 Cu 吸附量保留率高达 92.99%，具有很好
伴有多分子层吸附。由表 3 可知，30 ℃下，聚合物 的再生利用性能。综上所述，咪唑啉基偕胺肟化聚
AM/AO/NIPA 的饱和吸附量为 267.38 mg/g。此外， 合物 AM/AO/NIPA 是一种极具应用价值的重金属吸
Langmuir 等温吸附模型拟合结果显示，K L (AM/ 附材料。
2+
AO/NIPA)> K L (PAM)，表明 AM/AO/NIPA 对 Cu 的
参考文献：
亲和力更强。Freundlich 等温吸附模型中，AM/
[1] Zhang W, Zhu S, Luque R, et al. Recent development of carbon
AO/NIPA 比 PAM 的 K F 大一个数量级，说明 AM/
electrode materials and their bioanalytical and environmental
AO/NIPA 的吸附量远大于 PAM。 applications[J]. Chemical Society Reviews, 2016, 45(3): 715-752.
2.5.4 再生与重复利用性测定 [2] Tavakoli O, Goodarzi V, Saeb M R, et al. Competitive removal of
heavy metal ions from squid oil under isothermal condition by CR11
AM/AO/NIPA 的重复利用性结果见图 12，实验
chelate ion exchanger[J]. Journal of Hazardous Materials, 2017, 334:
方法同 1.4 节和 1.5 节，吸附剂用量为 0.05 g、吸附 256-266.
温度为 30 ℃、溶液 pH 为 5、吸附时间为 3 h。 [3] Zhang W, Aguila B, Ma S. Potential applications of functional porous
organic polymer materials[J]. Journal of Materials Chemistry A,

2017, 5: 8795-8824.
[4] Liu Wanyi (刘宛宜), Yang Luze (杨璐泽), Yu Meng(于萌), et al.
Preparation of poly(acrylate-acrylamide) hydrogel and its adsorption
performance to heavy metal ions[J]. Chinese Journal of Analytical
Chemistry (分析化学), 2016, 44(5): 707-715.
[5] Zou Y, Wang X, Khan A, et al. Environmental remediation and
application of nanoscale zero-valent iron and its composites for the
removal of heavy metal ions: a review[J]. Environmental Science &
Technology, 2016, 50(14): 7290-7304.
[6] Xiong Xingying (熊星滢), Pu Shengyan (蒲生彦), Ma Hui (马慧), et
al. Review on removal of heavy metal ions from aqueous solution by
hydrogel adsorption[J]. Industrial Water Treatment (工业水处理),

2016, 36(5): 1-4.
图 12 AM/AO/NIPA 的重复利用性能 [7] Zhao H, Liu X, Ming Y, et al. A study on the degree of
2+
Fig. 12 Recycling of AM/AO/NIPA for Cu adsorption amidoximation of polyacrylonitrile fibers and its effect on their
capacity to adsorb uranyl ions[J]. Industrial & Engineering Chemistry
Research, 2015, 54(12): 3101-3106.
如图 12 所示，聚合物 AM/AO/NIPA 经过 4 次
2+
[8] Dragan E S, Loghin D F A, Cocarta A I. Efficient sorption of Cu by
2+
循环吸附后，Cu 吸附量逐渐降低，但降低幅度很 composite chelating sorbents based on potato starch-graft-polyamidoxime
小，最后一次循环吸附后，其吸附效果保留了原始 embedded in chitosan beads[J]. ACS Applied Materials & Interfaces,
2014, 6(19): 16577-16592.
吸附效果的 92.99%，说明该聚合物具有很好的再生
[9] Zhang M, Gao Q, Yang C, et al. Preparation of amidoxime-based
与重复利用性能。 nylon 66 fibers for removing uranium from low concentration
aqueous solutions and simulated nuclear industry effluents[J].
3 结论 Industrial & Engineering Chemistry Research, 2016, 55(40): 10523-
10532.
[10] Gou S, Luo S, Liu T, et al. Thermally stable imidazoline-based
通过乳液聚合和偕胺肟化反应制备得到咪唑啉
sulfonate copolymers for enhanced oil recover[J]. RSC Advances,
基偕胺肟化聚合物 AM/AO/NIPA。SEM 和 TG 表征 2015, 5(104): 85165-85173.
结果显示，聚合物 AM/AO/NIPA 是疏松多孔结构， [11] Chen J, Qu R, Zhang Y, et al. Preparation of silica gel supported
amidoxime adsorbents for selective adsorption of Hg(Ⅱ) from
且具有良好的热稳定性。静态吸附实验表明，AM/
aqueous solution[J]. Chemical Engineering Journal, 2012, 209(41):
2+
AO/NIPA 对 Cu 的吸附更符合准二级动力学模型 235-244.
2
（R =0.9989），吸附过程以化学吸附为主；其吸附 [12] Yang Y, Wang J, Wu F, et al. Surface-initiated SET-LRP mediated by
mussel-inspired polydopamine chemistry for controlled building of
过程对 Langmuir 和 Freundlich 等温吸附模型均能较 novel core-shell magnetic nanoparticles for highly-efficient uranium
2+
好拟合；AM/AO/NIPA 对 Cu 的吸附十分复杂，既 enrichment[J]. Polymer Chemistry, 2016, 7(13): 2427-2435.
有表面的单分子层吸附，又伴有多分子层吸附。在 [13] Zhang H, Dang Q, Liu C, et al. Uptake of Pb(Ⅱ) and Cd(Ⅱ) on
chitosan microsphere surface successively grafted by methyl acrylate
30 ℃下，吸附剂用量为 0.05 g、溶液 pH 为 5、吸附 and diethylenetriamine[J]. ACS Applied Materials & Interfaces,
时间为 3 h 时，偕胺肟化聚合物 AM/AO/NIPA 的饱 2017, 9(12): 11144-11155.