Use of thermally treated waste biological sludge as dye absorbent

Abstract The capacity of adsorbent recycled from microwave thermal treatment to remove a synthetic dye, Rhodamine 6G, from a water bath, was examined. The acidified, dewatered sludge was microwave heated for 1–4 min. Batch adsorption tests were conducted on this sludge at various pH values and solution temperatures. Equilibrium of dye adsorption was obtained in 30 h. Three kinetic models—pseudo first-order, pseudo second-order and intra-particle diffusion—were applied to elucidate the adsorption kinetic data. Experimental results indicate that higher adsorption efficiency could be derived at higher pH/temperature levels. Moreover, the sample treated for 1 min by microwaves adsorbed more dye than did the sample so treated for 4 min. Sludge samples were also characterized to interpret the experimental findings. Energy cost analysis demonstrated the feasibility of the present microwave process.

[1]  Kun She Low,et al.  Chrome Sludge as an Adsorbent for Colour Removal , 1996 .

[2]  M. L. Mora,et al.  Adsorption of phenolic compounds and color from bleached Kraft mill effluent using allophanic compounds , 1999 .

[3]  Y. Ho,et al.  Batch Sorber Design Using Equilibrium and Contact Time Data for the Removal of Lead , 2000 .

[4]  F. Bux,et al.  Zinc biosorption by waste activated and digested sludges , 1999 .

[5]  Y. Ho,et al.  Comparative sorption kinetic studies of dye and aromatic compounds onto fly ash , 1999 .

[6]  G. Demirer,et al.  Effect of chromium(VI) on the biomass yield of activated sludge , 1999 .

[7]  W. Weber,et al.  Kinetics of Adsorption on Carbon from Solution , 1963 .

[8]  Z. Aksu,et al.  INVESTIGATION OF THE BIOSORPTION OF PHENOL AND MONOCHLORINATED PHENOLS ON THE DRIED ACTIVATED SLUDGE , 1998 .

[9]  I. D. Mall,et al.  Removal of basic dyes from wastewater using boiler bottom ash , 1995 .

[10]  T. Panswad,et al.  Mechanisms of Dye Wastewater Colour Removal by Magnesium Carbonate-Hydrated Basic , 1986 .

[11]  H. Yoshida,et al.  Adsorption of acid dye on cross-linked chitosan fibers: Equilibria , 1993 .

[12]  H. Verachtert,et al.  Activated sludges as animal feed: A review , 1989 .

[13]  G. Mckay,et al.  Adsorption of dyes on chitin. I. Equilibrium studies , 1982 .

[14]  S. Jeyaseelan,et al.  Development of adsorbent/catalyst from municipal wastewater sludge , 1996 .

[15]  Z. Aksu,et al.  Simultaneous biosorption of phenol and nickel(II) from binary mixtures onto dried aerobic activated sludge , 1999 .

[16]  Duu-Jong Lee,et al.  ADSORPTION OF RHODAMINE 6G FROM AQUEOUS SOLUTIONS ON ACTIVATED CARBON , 2001, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering.

[17]  Y. Ho,et al.  A COMPARISON OF CHEMISORPTION KINETIC MODELS APPLIED TO POLLUTANT REMOVAL ON VARIOUS SORBENTS , 1998 .

[18]  S. S. Nawar,et al.  Removal of dyes from effluents using low-cost agricultural by-products , 1989 .

[19]  Feng-Chin Wu,et al.  Kinetic modeling of liquid-phase adsorption of reactive dyes and metal ions on chitosan. , 2001, Water research.

[20]  G. Annadurai,et al.  Adsorption of Reactive Dye on Chitin , 1999 .

[21]  A. Zeng,et al.  Adsorption and desorption of pentachlorophenol on cells of Mycobacterium chlorophenolicum PCP-1. , 1997, Biotechnology and bioengineering.

[22]  M. Isaacs,et al.  Getting a grip on sludge , 1995 .