氨基磺酸改性海藻酸钠的制备及对Fe3+的吸附

doi:10.3969/j.issn.1673-5854.2022.05.002

生物质化学工程 ›› 2022, Vol. 56 ›› Issue (5): 8-14.doi: 10.3969/j.issn.1673-5854.2022.05.002

氨基磺酸改性海藻酸钠的制备及对Fe³⁺的吸附

王玥¹, 杨隽¹^,*(), 仇伟¹, 郭雅妮²

1. 武汉工程大学材料科学与工程学院, 湖北武汉 430205
2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室, 湖北武汉 430071

收稿日期:2021-09-08 出版日期:2022-09-30 发布日期:2022-09-27
通讯作者: 杨隽 E-mail:yang6362@wit.edu.cn
作者简介:杨隽, 博士生导师, 研究领域: 功能高分子材料制备与改性; E-mail: yang6362@wit.edu.cn
王玥(1998— ), 女, 四川内江人, 硕士生, 主要从事高分子材料的制备与改性研究工作
基金资助:
国家重点研发计划资助项目(2017YFC0804602);岩土力学与工程国家重点实验室开放基金资助项目(Z018008)

Preparation and Adsorption of Fe³⁺ Using Sulfamic Acid Modified Sodium Alginate

Yue WANG¹, Jun YANG¹^,*(), Wei QIU¹, Yani GUO²

1. School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
2. State Key Laboratory of Rock and Soil Mechanics and Engineering, Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

Received:2021-09-08 Online:2022-09-30 Published:2022-09-27
Contact: Jun YANG E-mail:yang6362@wit.edu.cn

摘要/Abstract

摘要：

为有效防止尾矿坝化学堵塞可在排水设施上涂覆海藻酸钠基吸附材料。以海藻酸钠(SA)为基体, 高碘酸钠为氧化剂, 氨基磺酸为改性材料, 制备了一种吸附材料氨基磺酸改性海藻酸钠(MSA), 使用FT-IR、SEM对其进行表征, 并研究了MSA对Fe³⁺的吸附行为。研究结果表明: —NHSO₃H被成功引入到海藻酸二醛(ADA)上制得MSA; MSA吸附Fe³⁺后分子尺寸增大, 分子链空隙增大。MSA吸附Fe³⁺的较佳吸附条件为Fe³⁺初始质量浓度200 mg/L、Fe³⁺溶液pH值2、吸附时间240 min, 吸附温度25 ℃, 此时MSA对Fe³⁺的吸附量最大, 为151 mg/g。吸附过程符合准二级动力学模型和Langmuir吸附等温式, MSA对Fe³⁺的吸附是单分子层化学吸附; 吸附热力学分析表明吸附过程是一个自发的过程, 且温度升高不利于吸附反应的进行。

关键词: 海藻酸钠, 氨基磺酸, 吸附材料, 铁离子

Abstract:

Coating adsorbent materials on drainage facilities could effectively prevent chemical clogging of tailings dams. In this study, a sulfamic acid-modified sodium alginate adsorbent(MSA) was prepared using sodium alginate(SA) as the matrix, sodium periodate as the oxidant, and sulfamic acid as the modified material. The structure was characterized by Fourier transform infrared spectroscopy and scanning electron microscope, and the adsorption behavior of MSA on Fe³⁺ was also studied. The results showed that MSA was prepared successfully by introducing —NHSO₃H into alginic acid dialdehyde(ADA). Molecular size and molecular chain gap of MSA increased after adsorbing Fe³⁺. The optimal conditions for the adsorption of Fe³⁺ by MSA were that the initial mass concentration of Fe³⁺ was 200 mg/L, the pH value was 2, the adsorption time was 240 min, and the adsorption temperature was 25 ℃. Under these conditions, the maximum Fe³⁺ adsorption capacity of MSA was 151 mg/g. The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir adsorption isotherm, and adsorption of Fe³⁺ by MSA was a monolayer chemical adsorption. Adsorption thermodynamic analysis showed that the adsorption process was a spontaneous process, and the increase of temperature was not conducive to the progress of the adsorption reaction.

Key words: sodium alginate, sulfamic acid, adsorption material, iron ion

中图分类号:

TQ35
TQ31

王玥, 杨隽, 仇伟, 郭雅妮. 氨基磺酸改性海藻酸钠的制备及对Fe³⁺的吸附[J]. 生物质化学工程, 2022, 56(5): 8-14.

Yue WANG, Jun YANG, Wei QIU, Yani GUO. Preparation and Adsorption of Fe³⁺ Using Sulfamic Acid Modified Sodium Alginate[J]. Biomass Chemical Engineering, 2022, 56(5): 8-14.

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参考文献 20

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吸附条件 adsorption condition		Fe³⁺吸附量/(mg·g^-1) Fe³⁺ adsorption capacity
pH值 pH value	0.5	3.66
	1.0	20.70
	1.5	44.60
	2.0	84.26
吸附时间 adsorption time	5 min	2.21
	10 min	6.63
	20 min	8.84
	60 min	11.05
	120 min	15.47
	180 min	18.79
	240 min	19.89
	300 min	19.89
	360 min	19.23

温度/℃ temperature	q_e/(mg·g^-1)	lnK	ΔG^Θ/ (kJ·mol^-1)	ΔH^Θ/ (kJ·mol^-1)	ΔS^Θ/ (kJ·mol^-1·K^-1)
20	86.61	2.50	-6.08	-9.01	-0.01
30	84.07	2.37	-5.98
40	82.60	2.19	-5.71
50	80.34	1.97	-5.30

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氨基磺酸改性海藻酸钠的制备及对Fe³⁺的吸附

Preparation and Adsorption of Fe³⁺ Using Sulfamic Acid Modified Sodium Alginate

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