BibTeX:

@article{IJIRSTV1I11077,
     title={Adsorption Isotherm Study of Cadmium on Dairy Sludge Based Adsorbent},
     author={Pawan Kumar Rose and Rani Devi},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={11},
     pages={145--151},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I11077.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

Aim of this research is to assess the potential of adsorbent derived from dairy industry sludge for the removal of cadmium from aqueous solution. Cadmium adsorption was studied in batch mode as a function of pH, adsorbent dose, contact time and initial metal ion concentration. The equilibrium uptake decreased with increasing adsorbent dose and increased with increasing cadmium concentration. The maximum cadmium removal was obtained at pH 6.0. The desorption efficiency of various desorbing agents is found in following order HCl>HNO3>EDTA>H2SO4. Langmuir, Freundlich and Temkin isotherms were tested on experimental adsorption data to represent the equilibrium between solid and liquid phases. Langmuir and Freundlich isotherm models provided a much better description of experimental data than Temkin isotherm model as revealed by high correlation coefficients (R2). The maximum adsorption capacity obtained from Langmuir model equation was 24.75 mg/g of cadmium onto dairy sludge based adsorbent (DSBA). The results of present study revealed that cadmium is considerably adsorbed on dairy sludge and DSBA can be successfully used for separation of cadmium from waste stream.

Adsorption, Cadmium, Dairy Sludge, Desorption Efficiency, Langmuir Isotherm