Subscribe Now Subscribe Today
Science Alert
Curve Top
Journal of Applied Sciences
  Year: 2011 | Volume: 11 | Issue: 21 | Page No.: 3659-3662
DOI: 10.3923/jas.2011.3659.3662
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Utilization of Waste Eggshells as Humidity Adsorbent

P. Pongtonglor, E. Hoonnivathana, P. Limsuwan, S. Limsuwan and K. Naemchanthara

The chicken and duck eggshell powders were prepared and heated at 1300°C for 4 h. The samples were analyzed by X-Ray Diffraction (XRD). It was found that Calcium Carbonate (CaCO3) from chicken and duck eggshells completely transformed into Calcium Oxide (CaO). Then the samples were placed in a box installed with a hygro-thermometer for humidity adsorption test in the range of 20-75% RH at 25°C. Hydration rate for duck and chicken eggshells were 0.0625% RH min-1 (within 880 min) and 0.0482% RH min-1 (within 1140 min) respectively. The results show that CaO from the duck eggshells is a better adsorbent than that of chicken eggshells. Furthermore, after humidity adsorption, CaO obtained from both eggshells were partly transformed into portlandite (Ca(OH)2 was confirmed by the Rietveld refinement method and Scanning Electron Microscope (SEM).
PDF Fulltext XML References Citation Report Citation
  •    Effect of Eggshell Powder on the Stabilizing Potential of Lime on an Expansive Clay Soil
  •    The Effects of Calcium and Vitamin D3 in Diet on Plasma Calcium and Phosphorus, Eggshell Calcium and Phosphorus Levels of Laying Hens in Late Laying Production Period
  •    Eggshell Conductance and Incubator Humidity as Factors in Embryo Survival and Poult Growth
  •    Adsorption Isotherms of Pb (II), Ni (II) and Cd (II) Ions onto PES
How to cite this article:

P. Pongtonglor, E. Hoonnivathana, P. Limsuwan, S. Limsuwan and K. Naemchanthara, 2011. Utilization of Waste Eggshells as Humidity Adsorbent. Journal of Applied Sciences, 11: 3659-3662.

DOI: 10.3923/jas.2011.3659.3662






Curve Bottom