Efficient removal of Ag+ and Cu2+ using imine-modified/mesoporous silica-coated magnetic nanoparticles

Advances in Environmental Technology

Mohammad Reza Ganjali¹  Ghodsi Mohammadi Ziarani²  Hadis Shooshtary³  Leila Hajiaghababaei⁴  Alireza Badiei⁵ 

[1] Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran;Department of Chemistry, Alzahra University, Tehran, Iran;Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran;Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, Iran;School of Chemistry, College of Science, University of Tehran, Tehran, Iran;

关键词: ag+;    cu2+;    imine-modified silica-coated magnetic nanoparticles;    removal;    wastewater;   

DOI  :  10.22104/aet.2019.3324.1164

来源: DOAJ

【 摘 要 】

The present work focuses on the synthesis and application of imine-modified silica-coated magnetic (IM-SCM) nanoparticles. The X-ray diffraction (XRD) tests indicated the presence of highly crystalline cubic spinel magnetite both before and after coating with the silica. The FTIR spectra also proved the successful surface coating and imine-modification of the Fe₃O₄ nanoparticles. Further investigations were performed to examine the capability of the modified IM-SCM nanoparticles for simultaneous removal of Ag⁺ and Cu²⁺ from the water samples. Atomic absorption spectrometry was used for ion determination. The best operating conditions for removing the target ions were a pH=5-9 and a stirring time=30 min. Only 20 mL of 3M nitric acid was used for stripping the ions using the IM-SCM nanoparticles. The resulting data were found to fit well with the Langmuir model, and the maximum capacity of the adsorbent was determined to be 270.3 (± 1.4) mg and 256.4 (± 0.9) mg of Ag⁺ and Cu²⁺ /g of IM-SCM, respectively. The adsorbent was successfully used for simultaneously removing the target ions from the wastewater samples.

【 授权许可】

Unknown