文章基本信息

标题：Synthesis of a novel porous Ag ₂O nanomaterial on ion exchange resin and its application for COD determination of high salinity water
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作者：Trung Thanh Nguyen ; Quynh Anh Nguyen Thi ; Ngoc Hang Le 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2021
卷号：11
DOI：10.1038/s41598-021-91004-w
语种：English
出版社：Springer Nature
摘要：This study reports for the first time on the synthesis of novel resin@P-Ag 2O 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 Ag 2O 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-Ag 2O 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-Ag 2O material has a very potential application for chloride removal and COD determination of high salinity water.