Eco-friendly spectrofluorimetric determination of Hg²⁺ using green-synthesized carbon nanodots from apricot kernel shells

Authors : Najlaa Ayad Salahaldeen, Nurhayat Özbek, Ümmühan Turgut Ocak, Miraç Ocak

Pages : 228-236

Doi:10.51435/turkjac.1658256

View : 58 | Download : 82

Publication Date : 2025-05-31

Article Type : Research Paper

Abstract :The green synthesis of blue fluorescent carbon nanodots (CNDs) from apricot kernel shells via a hydrothermal method was successfully executed. The interaction of the synthesized CNDs with various cations was systematically investigated using fluorescence spectroscopy. Fluorescence measurements were performed to evaluate the interaction of CNDs with 36 different cations, including Li⁺, Na⁺, K⁺, Be²⁺, Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺, Sc³⁺, Y³⁺, Ti⁴⁺, V⁵⁺, Cr³⁺, Mo⁶⁺, W⁶⁺, Mn²⁺, Fe³⁺, Co²⁺, Ni²⁺, Cu²⁺, Ag⁺, Zn²⁺, Cd²⁺, B³⁺, Al³⁺, Tl⁺, As⁵⁺, Se²+, NH₄⁺, Au³⁺, Sb³⁺, Sn⁴⁺, Bi³⁺, Hg²⁺, Pd²⁺, and Pb²⁺. Among these, the CNDs exhibited exceptional selectivity and sensitivity as a fluorescent probe for the detection of Hg²⁺ ions. The working range for Hg²⁺ detection was established as 35–95 µM, with a detection limit of 14.0 µM and a quantification limit of 41.4 µM. The method was validated and successfully applied to tap water and river water, demonstrating the practical utility of CNDs derived from apricot seed shells for environmental monitoring and analytical applications.
Keywords : Carbon nanodots (CNDs), Hydrothermal method, Apricot kernel shell, Fluorescence spectroscopy, Hg2+ determination

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