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合成新型多孔 AgO 纳米材料并将其应用于高盐度水样 COD 的测定。

Synthesis of a novel porous AgO nanomaterial on ion exchange resin and its application for COD determination of high salinity water.

机构信息

Laboratory of Nanomaterial, An Giang University, 18 Ung Van Khiem Street, Dong Xuyen Ward, Long Xuyen City, An Giang Province, Vietnam.

Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.

出版信息

Sci Rep. 2021 Jun 1;11(1):11487. doi: 10.1038/s41598-021-91004-w.

DOI:10.1038/s41598-021-91004-w
PMID:34075167
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8169930/
Abstract

This study reports for the first time on the synthesis of novel resin@P-AgO material and its application for reducing the chloride effect on COD determination of high salinity water. This engineered core-shell nanomaterial with cationic ion exchange resin core and porous AgO shell was prepared by facile ion exchange and silver oxidation method at ambient temperature without using toxic chemicals. The material was characterized by FTIR, XRD, SEM, and SEM-EDX mapping. In the chloride removal test, this material gave a high adsorption capacity of ca. 244 mgCl/gAg at the mild condition with high durability after several adsorption-desorption cycles. Moreover, resin@P-AgO was applied for removing chloride in water to improve the accuracy of the SMEWW 5220C:2012 method for COD determination of high salinity water. The result showed that the COD of a water sample with salt content after being treated by the material had a low error (≤ 10%) as compared to the sample without salt. Meanwhile, the COD of salty water measured by the dilution method had an error of around 15%. These results indicate that resin@P-AgO material has a very potential application for chloride removal and COD determination of high salinity water.

摘要

本研究首次报道了新型树脂@P-AgO 材料的合成及其在降低高盐度水中氯离子对 COD 测定影响方面的应用。该工程核壳纳米材料具有阳离子交换树脂核和多孔 AgO 壳，通过简便的离子交换和银氧化方法在室温下制备，无需使用有毒化学品。该材料通过 FTIR、XRD、SEM 和 SEM-EDX 映射进行了表征。在去除氯离子的测试中，该材料在温和条件下具有约 244 mgCl/gAg 的高吸附容量，经过几次吸附-解吸循环后具有高耐久性。此外，树脂@P-AgO 被用于去除水中的氯离子，以提高 SMEWW 5220C:2012 方法测定高盐度水中 COD 的准确性。结果表明，与不含盐的样品相比，经该材料处理后的含盐水样的 COD 误差较低（≤10%）。同时，稀释法测定咸水的 COD 误差约为 15%。这些结果表明，树脂@P-AgO 材料在去除高盐度水中的氯离子和测定 COD 方面具有很大的应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/501d61115760/41598_2021_91004_Fig10_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/57518f36c953/41598_2021_91004_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/5ac0d3bf678e/41598_2021_91004_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/501d61115760/41598_2021_91004_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/eb62829ffbfa/41598_2021_91004_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/aec4c16d4bcd/41598_2021_91004_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/548809151547/41598_2021_91004_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/9497ad3f71ad/41598_2021_91004_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/de8d314508eb/41598_2021_91004_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/b4176e2148da/41598_2021_91004_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/d08503e88f66/41598_2021_91004_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/57518f36c953/41598_2021_91004_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/5ac0d3bf678e/41598_2021_91004_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ec5/8169930/501d61115760/41598_2021_91004_Fig10_HTML.jpg

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