Developing an analytical method for mercury speciation in natural waters

Authors

  • Osama Abdo Tishreen University
  • Abd Al-Aziz Asaad Tishreen University
  • Giaath Abbass Tartous university

Abstract

In this research, an analytical method was developed to extract total, organic and inorganic mercury from natural waters by Solid- Phase Extraction using modified and activated silica gel as solid phases, and the concentrations of each were determined using cold vapor technique (Cold Vapor Atomic Absorption Spectrometry: CV-AAS). The silica gel was modified using ammonium pyrrolidine dithiocarbamate (APDC), while the silica gel was activated using chloroform. The extraction process was studied within the range (pH: 2-10), while the recovery process for total, organic and inorganic mercury from the surface of silica gel was studied within the concentration range (1-7 M) for nitric acid. As for method validation, this was done by comparing the results obtained with the results of reference methods. The results showed that the percentage of extraction of inorganic mercury using activated silica gel reached (97.3%) at (pH = 4), while the percentage of extraction of organic mercury using modified silica gel reached (99.3%) at (pH = 3). As for total mercury, it was Its extraction rate is (99.6%) at (pH=3). Regarding recovery, the highest percentage was at the concentration of nitric acid (6 M) for total, organic and inorganic mercury, with pre-concentration factor (100). The capacity of activated silica gel and modified silica gel are (628.44 µg/g), (1022.04 µg/g) respectively. Finally, the method detection limit of the new method was (0.12 ng/l).

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Published

2024-12-22

How to Cite

1.
عبدو ا, عبد العزيز اسعد, غياث عباس. Developing an analytical method for mercury speciation in natural waters. TUJ-BA [Internet]. 2024Dec.22 [cited 2024Dec.23];46(4):57-68. Available from: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/17718

Issue

Vol. 46 No. 4 (2024): Tishreen University Journal of Research and Scientific Studies - Basic Sciences Series

Section

Articles

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