Nanopartikel Perak Termodifikasi PVA menggunakan Ekstrak Bahan Alam untuk Deteksi Logam sebagai Upaya Kontrol Lingkungan
Keywords:
silver nanoparticles, PVA, sappan wood, metal ions, environmental controlAbstract
Environmental pollution caused by industrial, residential, and other human activities requires simple and environmentally friendly methods for detecting heavy metals. This study aimed to characterize silver nanoparticles synthesized using sappan wood extract as a bioreductor and PVA as a stabilizer, and to examine their ability to detect metal ions. The research involved the synthesis of silver nanoparticles from silver nitrate precursor, PVA modification at concentrations of 0.75% and 1.5%, characterization using UV-Vis spectrophotometry and a Particle Size Analyzer, and selectivity testing against Hg2+, Fe3+, Cu2+, Cr3+, and Pb2+ ions. The results showed that silver nanoparticles were successfully formed, as indicated by the yellow color of the solution and an absorption peak in the range of 400-500 nm. The particle sizes obtained were 145.6 nm and 150.5 nm. The selectivity test showed the strongest response to Hg2+, indicated by the disappearance of the AgNP absorption peak and a wavelength shift to 293.0 nm. These findings suggest that PVA-modified silver nanoparticles synthesized using sappan wood extract have potential as a material for detecting metal ions, particularly mercury, as part of environmental control efforts.
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