Please use this identifier to cite or link to this item: https://publication.npru.ac.th/jspui/handle/123456789/2165
Title: Development of colorimetric method for arsenic determination in water using silver nanoparticles
Other Titles: การพัฒนาวิธีตรวจวัดปริมาณสารหนูในน้ำด้วยเทคนิคการตรวจวัดสีโดยใช้อนุภาคเงินนาโน
Authors: Pakaiphuek, Phattharakorn
Rungsawang, Tipawan
Boekfa, Bundet
Keywords: Arsenic
Colorimetric method
Silver nanoparticles
Density functional theory
Issue Date: 13-Aug-2024
Publisher: The 16th NPRU National Academic Conference Nakhon Pathom Rajabhat University
Series/Report no.: Proceedings of the 16th NPRU National Academic Conference;703
Abstract: Arsenic contamination in the environment affects the body and causes disease, especially skin cancer. Arsenic contamination in the surface water is mainly found in two forms: As(III) and As(V). To monitor for arsenic in water, we have developed a colorimetric method for arsenic measurement using modified silver nanoparticles ( AgNPs) . With synthesizing AgNPs by a reduction reaction and optimization condition study for arsenic detection, AgNPs modified with L-Cysteine as a ligand were found to be the most suitable as reaction time at 10 minutes. The color solution of AgNPs changed from yellow to purplish pink, this corresponds to the absorption peak intensity decrease to redshift from 402 to 522 nm. The interaction of Cysteine on As(III) on Ag4 cluster was calculated with the M06-L density functional theory. The basis set was 6-311+G(2df,2p) and LANL2TZ. The As-Ag and S-As bonds were calculated, the adsorption energies were - 16.1 and -23.7 kcal/mol, respectively. The NBO analysis found that the As-Ag and As-S bonds have energies of -0.50036 and -0.50281 eV, respectively. The excited states of complexes were calculated with TD-DFT. The wavelength for the first excited states was calculated to be 723.6 nm.The results of this study indicate that the developed method can be used for measuring arsenic content in water samples.
URI: https://publication.npru.ac.th/jspui/handle/123456789/2165
ISBN: 978-974-7063-46-2
Appears in Collections:Proceedings of the 16th NPRU National Academic Conference

Files in This Item:
File Description SizeFormat 
NPRU_Conference_Proceeding_16_Final_หน้า_703-712.pdf1.08 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.