Characterization and adsorption properties of eggshells and eggshell membrane

Published Date
February 2006, Vol.97(3):488–493, doi:10.1016/j.biortech.2005.02.050

Author 

W.T. Tsai ^a,,

J.M. Yang ^b

C.W. Lai ^a

Y.H. Cheng ^a

C.C. Lin ^a

C.W. Yeh ^a

aDepartment of Environmental Engineering and Science, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan, ROC

bDepartment of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan, ROC

Received 8 October 2004. Revised 28 February 2005. Accepted 28 February 2005. Available online 17 May 2005. 

Abstract

The objective of this work was to study the chemical and physical characterization of eggshell and eggshell membrane particles prepared from the hen eggshell waste. Under the characterization measurements investigated, it was found that the pore structures of the two biomaterials belong to a typical Type II, indicating that they should be basically characteristic of nonporous materials or materials with macropores or open voids. Further, the chemical composition of the resulting eggshell particle was strongly associated with the presence of carbonate minerals from the Fourier transform infrared (FTIR) spectra. In contrast to the resulting eggshell membrane particle, the presence of functional groups of amines and amides was observable because of its chemical composition of fibrous proteins. From the isotherm data of methylene blue at 25 °C, the Freundlich model yielded a somewhat better fit than the Langmuir model. The adsorption isotherms revealed the eggshell biosorbents could only uptake the basic dye of less than 1.0 mg/g in aqueous medium, which was attributed to their poor pore properties.

Keywords

Eggshell

Eggshell membrane

Pore property

FTIR

Methylene blue adsorption

---

 Table 1

Table 1.

Fig. 1.

Fig. 2.

 Table 2

Table 2.

Fig. 3.

 Table 3

Table 3.

• ⁎ 
  Corresponding author. Tel.: +886 6 2660393; fax: +886 6 2669090.
  
  

For further details log on website :
http://www.sciencedirect.com/science/article/pii/S0960852409017441