การสกัดไอออนของโลหะที่เป็นพิษด้วยคีเลติงเรซินที่มีเบนโซไทเอโซล : รายงานผลการวิจัย

• المؤلف الرئيسي: อภิชาติ อิ่มยิ้ม
• التنسيق: Research Report
• اللغة: Thai
• منشور في: จุฬาลงกรณ์มหาวิทยาลัย 2006
• الموضوعات: ไอออนโลหะ; การสกัด (เคมี)
• الوصول للمادة أونلاين: https://digiverse.chula.ac.th/Info/item/dc:14134
• المؤسسة: Chulalongkorn University

Polystyrene-divinylbenzene resin (PS-DVB) was functionalized with a benzothiazole group on the surface. PS-DVB with amino group was initially prepared by nitration and amination reactions and subsequently treated with ethyl 2-benzothiazolylacetate to obtain the chelating resin with an amide linkage. The resin was characterized by elemental analysis and infrared spectroscopy and then evaluated for its extraction of Cd (II), Cu(II) and Pb(II) ions in water before their determinations by flame atomic absorption spectrometry. Extraction conditions for batch method such as pH of solution, extraction time, and absorption isotherms were optimized. The optimum pH for extraction of Cd(II), Cu(II) and Pb(II) are 7.0, 8.0, and 6.0, respectively while the equilibrium of Cd(II), Cu(II) were reached within 20 min and 40 min for Pb(II). Adsorption behavior of all metal ions followed Langmuir adsorption isotherm. The sorbed metals could be stripped by 1.0 M nitric acid solution with a yield of 74, 95, and 82% for Cd(II), Cu(II), and Pb (II), respectively. The spectator ions affect the sorption efficiency of the resin. The resin was successfully applied to extract the metal ions in real wastewater.