Fabrication of sodium alginate doped phosphoric acid composite hydrogel and its application of the adsorption of La (III) in wastewater

IF 3.8 2区 化学 Q1 BIOCHEMICAL RESEARCH METHODS
Jiaxin Duan, Wenting Li, Yun Wei
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Abstract

Recycling rare earth ions from wastewater is an important task, as rare earth elements have a wide range of applications and can cause harm to the environment if discharged arbitrarily. In this work, a simple and inexpensive hydroxyethylidene diphosphate-based adsorbent (SA@HEDP) for adsorbing lanthanum was designed and fabricated. The adsorbent SA@HEDP with the surface rich in phosphate and hydroxyl functional groups provided active sites for adsorption of lanthanum. Research on adsorption performance was conducted by testing the amount of HEDP added, the amount of adsorbent used, the effect of initial pH of La (III), adsorption time, and temperature. The results showed that the adsorption capacity of the adsorbent was 158.0 mg/g. Adsorption of La (III) in real wastewater was tested, when the initial concentration of La (III) was 319.2 mg/L, it could be basically all recovered through three adsorption processes. SEM, EDS mapping, XPS, FTIR, and Zeta potential were used to characterize and analyze the mechanism, and mass transfer kinetics was used to analyze the adsorption process of the adsorbent for La (III).

Abstract Image

海藻酸钠掺杂磷酸复合水凝胶的制备及其在废水中 La (III) 吸附中的应用。
从废水中回收稀土离子是一项重要任务,因为稀土元素应用广泛,如果随意排放会对环境造成危害。本研究设计并制造了一种简单、廉价的羟基亚乙基二磷酸吸附剂(SA@HEDP),用于吸附镧。表面富含磷酸和羟基官能团的吸附剂 SA@HEDP 为镧的吸附提供了活性位点。通过测试 HEDP 的添加量、吸附剂的用量、La (III) 的初始 pH 值、吸附时间和温度的影响,对吸附性能进行了研究。结果表明,吸附剂的吸附容量为 158.0 毫克/克。对实际废水中 La(III)的吸附进行了测试,当 La(III)的初始浓度为 319.2 mg/L 时,经过三个吸附过程,基本上可以全部回收。利用扫描电镜、EDS 图谱、XPS、傅立叶变换红外光谱和 Zeta 电位来表征和分析其机理,并利用传质动力学来分析吸附剂对 La (III) 的吸附过程。
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来源期刊
Journal of Chromatography A
Journal of Chromatography A 化学-分析化学
CiteScore
7.90
自引率
14.60%
发文量
742
审稿时长
45 days
期刊介绍: The Journal of Chromatography A provides a forum for the publication of original research and critical reviews on all aspects of fundamental and applied separation science. The scope of the journal includes chromatography and related techniques, electromigration techniques (e.g. electrophoresis, electrochromatography), hyphenated and other multi-dimensional techniques, sample preparation, and detection methods such as mass spectrometry. Contributions consist mainly of research papers dealing with the theory of separation methods, instrumental developments and analytical and preparative applications of general interest.
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