รหัสดีโอไอ 10.14456/jmmm.2020.13
Creator Tesfamariam TEKLU
Title Structural studies of natural zeolites and optimizations for water hardness softening media
Contributor Teklit Kidane GEBREMEDHIN
Publisher Metallurgy and Materials Science Research Institute Chulalongkorn University
Publication Year 2020
Journal Title Journal of Metals Materials and Minerals
Journal Vol. 30
Journal No. 1
Page no. 109-118
Keyword Natural zeolite ,Acid-activation ,Characterization ,Adsorption ,Adsorption isotherm
URL Website http://ojs.materialsconnex.com/index.php/jmmm/article/view/578
Website title Structural studies of natural zeolites and optimizations for water hardness softening media | Gebretsadik | Journal of Metals, Materials and Minerals
ISSN 8576149
Abstract This study was aimed at investigating the mineralogical composition and structural features of natural zeolites using XRF, XRD, TGA, FT-IR and SEM. Natural zeolites were subjected to acid-activation and subsequently with NaCl salt to enhance surface area for water hardness softening applications. Peaks around 3560 and 1650 cm-1 belongs to OH stretching and OH bending vibrations which confirmed the presence of moisture within zeolite structures. This result was further supported by evolution of moisture above 108ฐC from thermogravimetric analysis. Fibrous structures which are full of rough texture were examined by SEM. The XRD pattern confirmed Stellerite and Barrerite compositions were dominant crystal structures. The mineralogical analysis determined by XRF showed SiO2, Al2O3 and CaO were dominant oxides. The specific surface area of raw and acid-activated zeolites was estimated by the Sears' method and hence, the experimental values are 10.2 m2ทg-1 and 35.8 m2ทg-1, respectively. Batch adsorption parameters such as contact time, pH, adsorbent dose and initial concentrations were studied and optimized. Maximum adsorption capacity (8.04 mgทg-1) was recorded at optimum conditions. The experimental data was fitted-well with Freundlich isotherm model.
ดิจิตอลไฟล์ Digital File

บรรณานุกรม

Tesfamariam TEKLU,Teklit Kidane GEBREMEDHIN. (2020) Structural studies of natural zeolites and optimizations for water hardness softening media. Journal of Metals Materials and Minerals,30,109-118.
Tesfamariam TEKLU,Teklit Kidane GEBREMEDHIN. "Structural studies of natural zeolites and optimizations for water hardness softening media". Journal of Metals Materials and Minerals 30 (2020):109-118.
Tesfamariam TEKLU,Teklit Kidane GEBREMEDHIN. Structural studies of natural zeolites and optimizations for water hardness softening media. Metallurgy and Materials Science Research Institute Chulalongkorn University:ม.ป.ท. 2020.