纳米高岭土和纳米高岭土/ mnfe2o4复合材料对地下水中Th(IV)的吸附研究

IF 2.3 4区化学 Q3 CHEMISTRY, ANALYTICAL

International Journal of Environmental Analytical Chemistry Pub Date : 2023-10-09 DOI:10.1080/03067319.2023.2263385

Jaafar Jaaferh, Fawwaz I. Khalili, Ahmad S. Masadeh

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引用次数: 0

摘要

摘要研究了纳米高岭土和纳米高岭土/MnFe2O4复合材料对Th(IV)离子的吸附性能与pH、吸附剂质量、时间和温度的关系。动力学数据拟合为准二阶模型，纳米高岭土和纳米高岭土/MnFe2O4的单层吸附量(qm)在pH为3时达到最大值。拟合了Langmuir、Freundlich和Dubinin-Radushkevich等温线方程，并计算了相应的吸附常数。根据不同温度下的吸附等温线，计算出ΔH°(吸热)、ΔG°(有利)和ΔS°(正)。关键词:吸附;铁酸锰-纳米高岭土(R)纳米高岭土/MnFe2O4 (RC)U(VI)Th(IV)披露声明作者未报告潜在利益冲突。

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Removal of Th(IV) from groundwater by adsorption onto nano-Kaolin and nano-Kaolin/MnFe ₂ O ₄ composite

ABSTRACTThe adsorption of Th(IV) ions by nano-Kaolin and nano-Kaolin/MnFe2O4 composite were studied as a function of pH, sorbent mass, time, and temperature. Kinetic data was fitted to pseudo second-order model, and the maximum value of the adsorption capacity of the monolayer (qm) for nano-Kaolin and nano-Kaolin/MnFe2O4 was at pH 3. The Langmuir, Freundlich, and Dubinin–Radushkevich isotherm equations were fitted to the adsorption data and the proper constants were calculated. From adsorption isotherms at different temperatures, ΔH° (endothermic), ΔG° (favourable), and ΔS° (positive) were calculated.KEYWORDS: Adsorptionmanganese ferritenano-Kaolin (R)nano-Kaolin/MnFe2O4 (RC)U(VI)Th(IV) Disclosure statementNo potential conflict of interest was reported by the author(s).

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来源期刊

International Journal of Environmental Analytical Chemistry 环境科学-分析化学

CiteScore

5.90

自引率

7.70%

发文量

373

审稿时长

4.4 months

期刊介绍： International Journal of Environmental Analytical Chemistry comprises original research on all aspects of analytical work related to environmental problems. This includes analysis of organic, inorganic and radioactive pollutants in air, water, sediments and biota; and determination of harmful substances, including analytical methods for the investigation of chemical or metabolic breakdown patterns in the environment and in biological samples. The journal also covers the development of new analytical methods or improvement of existing ones useful for the control and investigation of pollutants or trace amounts of naturally occurring active chemicals in all environmental compartments. Development, modification and automation of instruments and techniques with potential in environment sciences are also part of the journal. Case studies are also considered, particularly for areas where information is scarce or lacking, providing that reported data is significant and representative, either spatially or temporally, and quality assured. Owing to the interdisciplinary nature of this journal, it will also include topics of interest to researchers in the fields of medical science (health sciences), toxicology, forensic sciences, oceanography, food sciences, biological sciences and other fields that, in one way or another, contribute to the knowledge of our environment and have to make use of analytical chemistry for this purpose.