Nanocomposite material in the trace and simultaneous electrochemical detection of As(III) and As(V)

Lalhruaitluangi, Melody; Lalawmpuia, Ricky; Tiwari, Diwakar; Dubey, Rama

doi:2025.30.5.240663

Environmental Engineering Research 2025;30(5): 240663 DOI: https://doi.org/10.4491/eer.2024.663

Nanocomposite material in the trace and simultaneous electrochemical detection of As(III) and As(V)

Melody Lalhruaitluangi¹, Ricky Lalawmpuia¹, Diwakar Tiwari¹

^†, and Rama Dubey²

¹Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796004, India
²Defence Research Laboratory, Post Bag No 02, Tezpur, Assam-784001, India

Corresponding Author: Diwakar Tiwari ,Tel: +91-9862323015, Email: diw_tiwari@yahoo.com

Received: November 27, 2024; Accepted: February 26, 2025.

ABSTRACT

Arsenic contamination in groundwater is severely impacting millions in North Eastern India, causing significant health issues. This communication discusses the use of a novel material for simultaneously detecting As(III) and As(V) at very low concentrations to address monitoring and safety concerns. Butter fruit (Persea americana) synthesized the silver nanoparticles (AgNP). These nanoparticles are then embedded directly into silane-functionalized bentonite to produce AgNP@TBNT. Several analytical methods characterize amicably the material and are utilized in fabricating the thin film glassy carbon electrode. An enhanced electroactive surface area and accelerated electron transfer processes are observed from the scan rate and EIS studies when compared with an unmodified glassy carbon electrode (GCE). Extensive parametric studies are conducted to optimize analyte detection, focusing on factors including pH, preconcentrated time, and potential, as well as the presence of ions that could interfere. The produced calibration graph for detecting As(III) and As(V) is quite satisfactory showing quite promising low limit of detection of (LOD) of 0.037 and 0.087 μgL^-1 for As(III) and As(V), respectively. Further, the AgNP@TBNT fabricated electrode is fairly stable, reasonable self-life and detects efficiently arsenic in river water samples.