Role of sawdust in the removal of copper(II) from industrial wastes

Abstract Sawdust, an inexpensive material has been utilised as an adsorbent for the removal of Cu(II) from waste water for their safe disposal. The effects of contact time, pH, concentration, temperature, dose, particle size of the adsorbent and salinity on the removal of Cu(II) have been studied. The equilibrium nature of copper(II) adsorption at different temperature (30–50°C) has been described by the Freundlich and Langmuir isotherm and a tentative mechanism has been proposed. The thermodynamic parameters like free energy, entropy and enthalpy changes for the adsorption of Cu(II) have also been computed and discussed. The kinetics and the factors controlling the adsorption process have also been studied.

[1]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[2]  W. Knocke,et al.  Mercury(II) sorption by waste rubber , 1981 .

[3]  H. Elliott,et al.  Adsorption characteristics of some Cu(II) complexes on aluminosilicates , 1981 .

[4]  I. Langmuir.  THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. , 1918 .

[5]  C. S. Rao,et al.  Environmental Pollution Control Engineering , 1992 .

[6]  G. Gupta,et al.  Effect of humic acid on copper adsorption by Kaolin , 1982 .

[7]  T. Tee,et al.  Removal of lead, cadmium and zinc by waste tea leaves , 1988 .

[8]  Debraj Modak,et al.  Studies of toxic effects of Hg(II) on Pistia stratiotes , 1985 .

[9]  John G. Dean,et al.  Removing heavy metals from waste water , 1972 .

[10]  G. Ozolins,et al.  WHO guidelines for drinking-water quality. , 1984, WHO chronicle.

[11]  C. N. Reilley,et al.  Chelon approach to analysis: I. Survey of theory and application , 1959 .

[12]  John Crank,et al.  The Mathematics Of Diffusion , 1956 .

[13]  A. Mohammad,et al.  Determination of microquantities of mercury(II) with preliminary thin-layer chromatographic separation from mercury(I), lead(II), nickel(II), and copper(II) on acid-treated silica gel layers: Recovery of mercury(II) from river waters and industrial wastewaters , 1989 .

[14]  V. N. Singh,et al.  Use of wollastonite for the treatment of Cu(II) rich effluents , 1986 .

[15]  M. Ajmal,et al.  Adsorption studies and the removal of dissolved metals using pyrolusite as adsorbent , 1995, Environmental monitoring and assessment.

[16]  M. Ajmal,et al.  Studies on removal and recovery of Cr(VI) from electroplating wastes , 1996 .

[17]  P. J. Peterson,et al.  Calcium, Magnesium and Trace Elements in a New Zealand Serpentine Flora , 1971 .

[18]  J. B. Kenworthy,et al.  Metal Pollution in the Aquatic Environment , 1980, Springer Berlin Heidelberg.

[19]  R. Culp,et al.  New concepts in water purification , 1974 .