Page 160 - 201903

第 36 卷第 3 期 精 细 化 工 Vol.36, No.3
201 9 年 3 月 FINE CHEMICALS Mar. 2019

水处理技术与环境保护
CPAM 插层膨润土复合材料的制备及对磷吸附行为

3
1
王爱民 1,2 ，白 妮 1,2 ，王金玺 ，亢玉红 1,2 ，康海燕 ，马亚军 1,2
（1. 榆林学院 化学与化工学院，陕西 榆林 719000；2. 陕西省低变质煤洁净利用重点实验室，陕西 榆
林 719000；3. 榆林市急救指挥调度中心，陕西 榆林 719000）

摘要：分别采用十六烷基三甲基溴化铵（CTMAB）、阳离子聚丙烯酰胺（CPAM）两步湿法成功制备出 CPAM
插层钠基膨润土（Bent）复合材料（CTMAB/Bent 和 CPAM/Bent），利用 XRD、FESEM、FTIR、BET 以及
TG-DTG-DSC 对材料进行了表征，并进行模拟含磷废水的吸附研究。结果表明：CPAM 已稳定插层在 Bent 的片
层结构中，其层间距显著增大，红外光谱出现明显的羰基吸收峰，比表面积减小而表面疏水性增强。含磷废水
处理结果表明，吸附性能大小的顺序为 CPAM/Bent > CTMAB/Bent > Bent，随着反应温度升高、含磷废水初始
浓度增加以及 pH 降低，CPAM/Bent 对磷的去除率逐渐增大，当含磷废水初始质量浓度为 3.5 mg/L、pH≈5、温
度为 35 ℃、投加量 5 g/L，20 min 去除率达 75%。CPAM/Bent 经过 5 次吸附和再生后，其吸附磷的能力显著下
降。吸附等温线均符合 Langmuir 和 Freundlich 方程，吸附过程更好地满足准二级动力学方程。
关键词：钠基膨润土；CTMAB；CPAM；插层；磷；吸附；水处理技术
中图分类号：X703.5 文献标识码：A 文章编号：1003-5214 (2019) 03-0506-08

Preparation and Phosphorus Adsorption Property of Cationic
Polyacrylamide Intercalated Bentonite Composite

1,2
1
1,2
3
1,2
1,2
WANG Ai-min , BAI Ni , WANG Jin-xi , KANG Yu-hong , KANG Hai-yan , MA Ya-jun
（1. School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, Shaanxi, China; 2. Shaanxi Key
Laboratory of Low Metamorphic Coal Clean Utilization, Yulin University, Yulin 719000, Shaanxi, China; 3. Yulin
Emergency Command and Dispatch Center, Yulin 719000, Shaanxi, China）
Abstract: Composite material was synthesized by modifying Na-bentonite (Bent) with
hexadecyltrimethylammonium bromide (CTMAB), cationic polyacrylamide (CPAM) through two-step wet
method. The samples were characterized by XRD, FESEM, FTIR, BET and TG-DTG-DSC. Then, the
adsorption of simulated phosphorous wastewater was investigated. The results indicated that CPAM was
intercalated into the lamellar structure of Na-bentonites steadily, the layer spacing was significantly
increased. The infrared spectrum showed that the composite material had obvious carbonyl absorption
peaks. Its specific surface area decreased and surface hydrophobicity was enhanced after intercalation. The
results of adsorption of phosphorous wastewater revealed that the order of adsorbability was CPAM/Bent >
CTMAB/Bent > Bent. With the increase of reaction temperature, the initial concentration of phosphorous
wastewater and the decrease of pH value, the removal rate of phosphorus by CPAM/Bent was gradually
increased. Under the conditions of initial concentration of phosphorous wastewater 3.5 mg/L, pH≈5,
temperature 35 ℃, adding amount of CPAM/Bent 5 g/L, and adsorption time 20 min, the removal rate of
phosphorus was 75%. After five times adsorption and regeneration, the adsorption ability of CPAM/Bent to
phosphorus decreased significantly. The adsorption isotherms could be described by Langmuir and
Freundlich equations. The adsorption process could be better satisfied with the pseudo-second order kinetic
equation.
Key words: Na-Bentonite; hexadecyltrimethylammonium bromide; cationic polyacrylamide; intercalation;

收稿日期：2018-06-17; 定用日期：2018-12-03; DOI: 10.13550/j.jxhg.20180442
基金项目：国家自然科学基金（21663033）
作者简介：王爱民（1978—），男，副教授，硕士，E-mail：wangaimin2001@163.com。