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改性斜发沸石作为一种高效吸附剂，用于从水溶液中去除四价钍。

Modification of Clinoptilolite as a Robust Adsorbent for Highly-Efficient Removal of Thorium (IV) from Aqueous Solutions.

机构信息

Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia.

Department of Physics, Faculty of Applied Science, Umm Al-Qura University, Makkah 21955, Saudi Arabia.

出版信息

Int J Environ Res Public Health. 2022 Oct 23;19(21):13774. doi: 10.3390/ijerph192113774.

DOI:10.3390/ijerph192113774
PMID:36360653
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9658948/
Abstract

The natural zeolite has been modified with sulphate and phosphate. The adsorption of thorium from the aqueous solutions by using the natural and modified zeolites has been investigated via a batch method. The adsorbent samples were characterized by X-ray Diffraction (XRD), N adsorption-desorption (BET), Fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDX). Modification of natural zeolite with sulphate and phosphate was found to increase its adsorption capacity of thorium but reduced its specific surface area (S). The adsorption experiments were expressed by Langmuir, Freundlich and Dubinin-Radushkevitch (D-R) isotherm models and the results of adsorption demonstrated that the adsorption of thorium onto the natural and modified zeolites correlated better with the Langmuir isotherm model than with the Freundlich isotherm model. The maximum adsorption capacity (Qo) was determined using the Langmuir isotherm model at 25 °C and was found to be 17.27, 13.83, and 10.21 mg/g for phosphate-modified zeolite, sulfate-modified zeolite, and natural zeolite, respectively. The findings of this study indicate that phosphate-modified zeolite can be utilized as an effective and low-cost adsorbent material for the removal of thorium from aqueous solutions.

摘要

天然沸石已用硫酸盐和磷酸盐进行改性。通过分批法研究了天然沸石和改性沸石从水溶液中吸附钍的情况。采用 X 射线衍射（XRD）、氮气吸附-解吸（BET）、傅里叶变换红外（FTIR）、场发射扫描电子显微镜（FESEM）和能谱（EDX）对吸附剂样品进行了表征。硫酸盐和磷酸盐改性天然沸石发现可以增加其对钍的吸附容量，但降低了其比表面积（S）。吸附实验由 Langmuir、Freundlich 和 Dubinin-Radushkevitch（D-R）等温线模型表示，吸附结果表明，钍在天然沸石和改性沸石上的吸附更符合 Langmuir 等温线模型，而不是 Freundlich 等温线模型。在 25°C 下，使用 Langmuir 等温线模型确定了最大吸附容量（Qo），对于磷酸盐改性沸石、硫酸盐改性沸石和天然沸石，分别为 17.27、13.83 和 10.21 mg/g。本研究结果表明，磷酸盐改性沸石可用作从水溶液中去除钍的有效且低成本的吸附材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/c35fa8b37158/ijerph-19-13774-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/ef700531d116/ijerph-19-13774-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/b42703dbfc0c/ijerph-19-13774-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/3a31a06c7eba/ijerph-19-13774-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/c8d55aa4abdb/ijerph-19-13774-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/9dd5c6a71430/ijerph-19-13774-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/8e4a83597738/ijerph-19-13774-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/2d4f7c32d0ca/ijerph-19-13774-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/d2f8a7d4ad66/ijerph-19-13774-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/e3d43a383211/ijerph-19-13774-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/4e6d7e63cb9b/ijerph-19-13774-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/d34e6c7e40c4/ijerph-19-13774-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/975e6b0165d6/ijerph-19-13774-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/5f8bcad5598a/ijerph-19-13774-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/96beb5cabcf0/ijerph-19-13774-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/2dc109f087cc/ijerph-19-13774-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/48833740ad72/ijerph-19-13774-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/c35fa8b37158/ijerph-19-13774-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/ef700531d116/ijerph-19-13774-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/b42703dbfc0c/ijerph-19-13774-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/3a31a06c7eba/ijerph-19-13774-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/c8d55aa4abdb/ijerph-19-13774-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/9dd5c6a71430/ijerph-19-13774-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/8e4a83597738/ijerph-19-13774-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/2d4f7c32d0ca/ijerph-19-13774-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/d2f8a7d4ad66/ijerph-19-13774-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/e3d43a383211/ijerph-19-13774-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/4e6d7e63cb9b/ijerph-19-13774-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/d34e6c7e40c4/ijerph-19-13774-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/975e6b0165d6/ijerph-19-13774-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/5f8bcad5598a/ijerph-19-13774-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/96beb5cabcf0/ijerph-19-13774-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/2dc109f087cc/ijerph-19-13774-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/48833740ad72/ijerph-19-13774-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1bc4/9658948/c35fa8b37158/ijerph-19-13774-g017.jpg

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