| Title: | Speciation analysis of silver ions and nanoparticles using humic‑acid‑modified silica and ICP‑OES |
| Researcher: | Pimpimon Anekthirakun, Nakara Bhawawet & Apichat Imyim |
| Degree: | วิทยาศาสตรบัณฑิต – Bachelor of Science Program |
| Major: | วท.บ. (เคมี) – B.S. (Chemistry) |
| Faculty of study: | วิทยาศาสตร์ ภาควิชาเคมี – Department of Chemistry, Faculty of Science |
| Academic year: | 2566 (2023) |
| Published: | Chemical Papers Volume 76, pages 7333–7342, (2022) Click |
Abstract
Humic-acid-modified silica was prepared via immobilization of humic acids onto aminopropyl-silica (SiAP-HA). These environmentally friendly materials could be used for the separation of silver ions, Ag(I), and silver nanoparticles (AgNPs) from an aqueous solution. The extraction of Ag(I) using SiAP-HA was achieved at the optimum pH of 3, while AgNPs remained in the solution. The adsorption behavior of Ag(I) was described by the Langmuir model at 298 K, with a maximum adsorption capacity of 31.3 mg/g. The desorption of Ag(I) was successful using 0.1 M nitric acid solution. After solid-phase separation, both silver species were determined by an inductively coupled plasma-optical emission spectrometer (ICP-OES) with good accuracy and precision.
Keywords: Humic acids, Modified silica, Speciation, Silver ions, Silver nanoparticles
Speciation analysis of silver ions and nanoparticles using humic‑acid‑modified silica and ICP‑OES. บทความ (Paper). Advisor: ดร.พิมพ์พิมล อเนกธีรกุล – Pimpimon Anekthirakun, Ph.D.. วิทยาศาสตร์และเทคโนโลยี|Science and Technology. วิทยาศาสตร์ ภาควิชาเคมี – Department of Chemistry, Faculty of Science. วิทยาศาสตรบัณฑิต – Bachelor of Science Program. วท.บ. (เคมี) – B.S. (Chemistry). Bangkok: Siam University
Academic Year 2023, วิทยาศาสตร์และเทคโนโลยี|Science and Technology, วิทยาศาสตร์ ภาควิชาเคมี – Department of Chemistry, Faculty of Science, วิทยาศาสตรบัณฑิต – Bachelor of Science Program,วท.บ. (เคมี) – B.S. (Chemistry)