Page 159 - 201807

第 35 卷第 7 期 精 细 化 工 Vol.35, No.7
201 8 年 7 月 FINE CHEMICALS July 2018

水处理技术与环境保护
2+
羧甲基化沙柳木粉负载纳米零价铁吸附水中 Pb

*
扈佳琪，王 丽
（内蒙古农业大学 材料科学与艺术设计学院，内蒙古 呼和浩特 010018）

摘要：以羧甲基化沙柳木粉（CMS）为载体，采用液相还原法制得羧甲基化沙柳木粉负载纳米零价铁（NZVI/CMS）
吸附剂。采用 SEM、FTIR、XRD 和 TEM 对纳米零价铁（NZVI）和 NZVI/CMS 的微观结构进行了表征。考察
2+
了不同吸附条件对 NZVI 和 NZVI/CMS 吸附 Pb 性能的影响。结果显示：NZVI 成功负载在 CMS 上，负载后的
NZVI 分散性明显提高，团聚现象得到有效解决，CMS 起到分散 NZVI 颗粒的作用。吸附结果显示：当 NZVI
2+
和 NZVI/CMS 的投加量分别为 0.05 和 0.01 g，Pb 初始质量浓度分别为 600 和 400 mg/L，吸附时间为 120 min，
2+
2+
吸附温度为 30 ℃，Pb 溶液 pH 分别为 4.5 和 4.0 时，NZVI 和 NZVI/CMS 对 Pb 的吸附量最大，分别为 390.3
和 535.5 mg/g。循环吸附实验表明，循环 3 次后，NZVI 的吸附量为 98.6 mg/g，而 NZVI/CMS 的吸附量可达 469.7
mg/g，NZVI/CMS 呈现出比 NZVI 更优越的循环使用性能。
2+
关键词：沙柳；纳米零价铁；吸附；还原；Pb ；水处理技术
中图分类号：X52 文献标识码：A 文章编号：1003-5214 (2018) 07-1227-08

Carboxymethylated Salix Psammophila Powder Supported Nanoscale
Zero-Valent Iron: Preparation and Adsorption Behavior
2+
toward Pb in Aqueous Solution

*
HU Jia-qi, WANG Li
（College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, Inner Mongolia,
China）

Abstract: A new adsorption agent, carboxymethylated salix psammophila (CMS) powder supported
nanoscale zero-valent iron (NZVI/CMS) was prepared by liquid phase reduction method with nanoscale
zero-valent iron (NZVI) as a carrier. The micro structures of NZVI and NZVI/CMS were characterized by
means of SEM, FTIR, XRD and TEM. The effects of different adsorption conditions on the adsorption
2+
capabilities of NZVI and NZVI/CMS for Pb were studied. The results showed that NZVI was successfully
loaded on CMS. In addition, the introduction of CMS efficiently resolved the reunion of NZVI particles and
improved the dispersibility of NZVI particles. The adsorption results indicated that the maximum
2+
adsorption capacity of NZVI/CMS for Pb reached 535.5 mg/g when the dosage of NZVI/CMS was 0.01 g,
2+
the initial mass concentration of Pb was 400 mg/L, the adsorption time was 120 min, the adsorption
2+
temperature was 30 ℃, and the pH value of Pb solution was 4.0. However, the maximum adsorption
2+
capacity of NZVI for Pb was only 390.3 mg/g under the optimum adsorption conditions of NZVI dosage
2+
0.05 g, initial mass concentration of Pb 600 mg/L, adsorption time 120 min, adsorption temperature 30℃,
2+
pH value of Pb solution 4.5. The cyclic adsorption experiments revealed that after recycling for three
times, the adsorption capacity of NZVI was 98.6 mg/g, whereas that of NZVI/CMS was 469.7 mg/g,
indicating that NZVI/CMS had better reusability than NZVI.
2+
Key words: salix psammophila; nanoscale zero-valent iron; adsorption; reduction; Pb ; water treatment
technology

收稿日期：2017-07-04; 定用日期：2017-10-26; DOI: 10.13550/j.jxhg.20170538
基金项目：内蒙古自然科学基金（2016MS0210）；内蒙古农业大学优秀青年科学基金（2014XYQ-12）
作者简介：扈佳琪（1992—），男，硕士生。联系人：王 丽（1978—），女，教授，电话：0471-4300240，E-mail：wl2083663@126.com。