Spectrophotometric Detection of Mercury Using Lignosulphonic Stabilized Silver Nanoparticles (AgNP)

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-09-10 DOI:10.22068/IJMSE.17.3.80

A. Thakur, Gantla Sai Kumar Reddy

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引用次数: 1

Abstract

Mercury, one of the common pollutants in water, is known to affect human health adversely upon exposure. It is released in water not only by various natural processes but also by human activities. Methods developed so far for the detection of mercuric ions in water have limitations like sensitivity range, complex setup, skillful operation etc. Silver nanoparticles, due to unique properties, have been explored by researchers to develop better detection systems. Stable silver nanoparticles can be easily synthesized by methods of green chemistry, its reaction with mercuric ion can be easily observed by changes in color and UV-Vis spectra. The absorbance data from UV-Vis spectra can also be used in quantifying mercury concentration. In this paper, stable silver nanoparticles synthesized using silver nitrate as precursor, sodium lignosulphonate (LS) as reducing and stabilizing agent under microwave radiation are explored for detection of mercuric ions in water. Formation of Ag nanoparticles was confirmed by UV-Vis band at 403.5nm. The intensity of this band showed a proportional decrease with increasing Hg+2 concentration. Hg+2 ions were detected by a distinct color change at higher concentration of Hg+2 also. The limit of detection (LOD) calculated from the observed absorbance data to be 0.7 ppm.

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木质素磺酸稳定银纳米粒子分光光度法测定汞

汞是水中常见的污染物之一，已知一旦接触就会对人体健康产生不利影响。它不仅通过各种自然过程释放到水中，而且通过人类活动释放到水中。目前发展的水汞离子检测方法存在灵敏度范围大、设置复杂、操作繁琐等局限性。银纳米粒子由于其独特的性质，已经被研究人员用来开发更好的检测系统。用绿色化学方法可以很容易地合成稳定的纳米银，通过颜色变化和紫外可见光谱可以很容易地观察到其与汞离子的反应。紫外可见光谱的吸光度数据也可用于汞浓度的定量。本文以硝酸银为前驱体，木质素磺酸钠(LS)为还原剂和稳定剂，在微波辐射下合成了稳定的银纳米粒子，用于水中汞离子的检测。在403.5nm处用紫外可见光谱证实了银纳米颗粒的形成。该波段的强度随Hg+2浓度的增加而成比例降低。Hg+2离子在较高浓度下也有明显的颜色变化。根据观察到的吸光度数据计算出的检测限(LOD)为0.7 ppm。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.