Fe<sub>3</sub>O<sub>4</sub>/镁铁类水滑石复合物的制备及吸附性能

doi:10.11894/iwt.2018-0930

工业水处理 ›› 2019, Vol. 39 ›› Issue (11): 49-53. doi: 10.11894/iwt.2018-0930

Fe₃O₄/镁铁类水滑石复合物的制备及吸附性能

吴永娟^1,²(),王晓兰¹,闫俊英³,刘博⁴

1. 陕西学前师范学院化学与化工系, 陕西西安 710100
2. 陕西师范大学化学化工学院应用表面与胶体化学教育部重点实验室, 陕西西安 710062
3. 河北师范大学化学与材料科学学院, 河北石家庄 050024
4. 西安科技大学安全学院消防工程系, 陕西西安 710054

收稿日期:2019-09-24 出版日期:2019-11-20 发布日期:2019-11-22
作者简介:吴永娟(1976-),博士,副研究员。电话:13227857829, E-mail:yjwu76@163.com
基金资助:
国家自然科学基金(B070202);国家自然科学基金(51904233);陕西省自然科学基金(2016JM2018);陕西省自然科学基金(2017JQ5023);陕西省教育科学“十三五”规划2016年度课题(SGH16H133)

Preparation of Fe₃O₄/Mg-Fe layered double hydroxides and its adsorption performance

Yongjuan Wu^1,²(),Xiaolan Wang¹,Junying Yan³,Bo Liu⁴

1. Department of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University, Xi'an 710100, China
2. Key Laboratory of Applied Surface and Colloid Chemistry(MOE), School of Chemistry&Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
3. College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China
4. Xi'an University of Science and Technology, Xi'an 710054, China

Received:2019-09-24 Online:2019-11-20 Published:2019-11-22
Supported by:
国家自然科学基金(B070202);国家自然科学基金(51904233);陕西省自然科学基金(2016JM2018);陕西省自然科学基金(2017JQ5023);陕西省教育科学“十三五”规划2016年度课题(SGH16H133)

摘要/Abstract

摘要：

采用溶剂热-共沉淀两步法制得环境友好型磁性吸附剂四氧化三铁/镁铁类水滑石复合物（Fe₃O₄@Mg-Fe-LDH）。以甲基橙（MO）为模拟污染物，研究了各因素对Fe₃O₄@Mg-Fe-LDH吸附性能的影响。结果表明，MO的初始质量浓度为140 mg/L时，Fe₃O₄表面包覆Mg-Fe-LDH为55%、吸附溶液的pH控制在4.5~7.0时吸附效果最佳，且吸附规律符合Langmuir模型。

关键词: 四氧化三铁, 镁铁类水滑石, 甲基橙, 吸附

Abstract:

Fe₃O₄/Mg-Fe layered double hydroxides(Fe₃O₄@Mg-Fe-LDH), an environment friendly adsorbent, was prepared by a two-step solvothermal-coprecipitation method. Taking methyl orange(MO) as a simulated contaminant, the effects of various factors on the adsorption performance of Fe₃O₄@Mg-Fe-LDH were studied. The results showed that the optimum condition for MO removal was obtained, when the coated-quantity of Mg-Fe-LDH on Fe₃O₄ was 55%, the solution pH was controlled at 4.5-7.0 and the MO concentration was 140 mg/L. The adsorption of MO on Fe₃O₄@Mg-Fe-LDH conforms to the Langmuir model well.

Key words: magnetite, Mg-Fe hydrotalcite, methyl orange, adsorption

中图分类号:

X703
TQ424

吴永娟,王晓兰,闫俊英,刘博. Fe₃O₄/镁铁类水滑石复合物的制备及吸附性能[J]. 工业水处理, 2019, 39(11): 49-53.

Yongjuan Wu,Xiaolan Wang,Junying Yan,Bo Liu. Preparation of Fe₃O₄/Mg-Fe layered double hydroxides and its adsorption performance[J]. Industrial Water Treatment, 2019, 39(11): 49-53.

https://www.iwt.cn/CN/Y2019/V39/I11/49

图/表 7

图1 XRD图谱

图2 FT-IR谱图

图3 Mg-Fe-LDH的包覆量对FLDH XRD图谱的影响

表1 系列FLDH XRD参数

LDH含量/%	d_（003）/nm	D₍₀₀₆₎/nm	晶粒尺寸/nm	分散度/%
0	-	-	-	-
33	7.83	3.90	11.5	8.3
55	7.69	3.84	15.6	6.15
66	7.70	3.87	16.4	5.80
80	7.69	3.84	16.7	5.74

图4 镁铁类水滑石包覆质量对甲基橙吸附的影响

图5 吸附溶液pH对FLDH55吸附MO的影响及吸附反应后体系pH

图6 甲基橙初始浓度对于FLDH55吸附性能的影响

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