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Adsorption Study of Al3+, Cr3+, and Mn2+ onto Quartz and Corundum using Flow Microcalorimetry, Quartz Crystal Microbalance, and Density Functional Theory

Penulis : Nicholas Allen [-]
Kontributor / Dosen Pembimbing :
  • Chong Dai,Yandi Hu, James D. Kubicki, Nadine Kabengi
Jenis Koleksi : Jurnal elektronik
Tahun Terbit :
Penerbit : Lain-lain
Fakultas :
Subjek :
Kata Kunci : flow microcalorimetry (FMC), quartz crystal microbalance with dissipation (QCM-D), density functional theory (DFT) calculations, endothermic and exothermic, reversibility, ion hydrolysis, ion dehydration, bond energy
Sumber : American Chemical Society
Staf Input/Edit : Irwan Sofiyan  
File : 1 file
Tanggal Input : 21 Mar 2019

2019_EJRNL_PP_Nicholas_Allen_-1.pdf
Terbatas Irwan Sofiyan
» ITB

The adsorption of aqueous ions onto natural mineral surfaces controls numerous mineral?water interactions and is governed by, among other numerous factors, ion dehydration and hydrolysis. This work explored the extent to which dehydration and hydrolysis affect the adsorption of three metal cations, Al3+, Cr3+, and Mn2+, onto quartz (SiO2) and corundum (Al2O3) surfaces at pH 3.8 through the integration of flow microcalorimetry (FMC), quartz crystal microbalance with dissipation (QCM-D) measurements and density functional theory (DFT) calculations. At pH 3.8, negligible amounts of Mn2+ and Al3+ are hydrolyzed, while 78% of Cr3+ exist in hydrolyzed species. QCM-D and FMC measurements showed that Al3+ and Cr3+ adsorb to both surfaces, while Mn2+ adsorbed only to Al2O3. DFT bond energy calculations confirmed the favorable bonding between .....

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