Palladium Particles‐Impregnated Natural Phosphate Electrodes for Electrochemical Determination of Mercury in Ambient Water Samples

Abstract

We present here a simple procedure for the determination of mercury(II) using differential pulse anodic stripping voltammetry (DPASV) at palladium particles‐impregnated natural phosphate modified carbon paste electrodes (Pd‐NP‐CPE). The surface of modified electrode was characterized using SEM, infrared spectroscopy, X‐ray diffraction and electrochemical analysis. All experimental variables involved in the voltammetric stripping method were optimized. The detection limit was found to be 4.99×10−8 mol L−1 (S/N=3) that is not different to the permitted value for Hg(II) in water reported by the Environmental Protection Agency (EPA). The proposed electrode exhibits good applicability for monitoring Hg(II) in tap and wastewater.

Palladium nanoparticles supported on mesoporous natural phosphate: An efficient recyclable catalyst for nitroarene reduction

“…The investigation of the analysis results confirms that the choice of the wetness impregnation method of palladium nanoparticles onto mesoporous NP is advantageous, particularly in terms of a good distribution and dispersion of Pd compared to previous works. [27,28]…”

“…[26] Various supported catalysts have been used but only few works are devoted to natural phosphate as a support. [27,28] However, solid phosphates such as natural phosphate, hydroxyapatite and fluorapatite have been prepared and used as catalysts. [29,30] Recently, we reported an efficient method for the preparation of β-enaminoesters using hydroxyapatite as catalyst.…”

“…Among the various supports reported in the literature, natural supports have been paid much attention due to inexpensive valuable resource and environmentally benign effect . Various supported catalysts have been used but only few works are devoted to natural phosphate as a support . However, solid phosphates such as natural phosphate, hydroxyapatite and fluorapatite have been prepared and used as catalysts .…”

Colorimetric detection of mercury ions using MnO2 nanorods as enzyme mimics

“…There are various classical methods that have been developed for the determination of Hg 2+ , including cold vapor atomic absorption spectroscopy, 4 cold vapor generation inductively coupled plasma mass spectrometry, 5 chemiluminescence, 6 electrochemical, 7 chromatographic 8 and uorometric methods. 9 These methods exhibited to be sensitive and very specic, but required complicated, time-consuming sample preparation and treatments, and expensive, sophisticated instruments that limit their further applications.…”

Enhanced Peroxidase Mimetic Activity of Magnetic Porous Carbon (MPC) Utilized in Colorimetric Sensing of Hg (II) Ions in Aqueous Medium

“…To overcome these challenges, various alternative methods have been tried for the detection of Hg 2 + such as colorimetric, [12][13][14] fluorescence [15][16][17][18] and electrochemical . [19] Among all, colorimetric method is the most suitable method for the detection of Hg 2 + ion in aqueous solution, because it is most economical, simple, [20][21] portability, and quick colour change, [22][23] which can be easily observed by naked eye. [24][25] Recently, the unique properties of nanocomposites were focused by various scientific fields such as biotechnology, biomedical material [26] and environmental science.…”