Kinetics and equilibrium studies of malachite green adsorption on rice straw-derived char.

In this work, the potential feasibility of rice straw-derived char (RSC) for removal of C.I. Basic Green 4 (malachite green (MG)), a cationic dye from aqueous solution was investigated. The isotherm parameters were estimated by non-linear regression analysis. The equilibrium process was described well by the Langmuir isotherm model. The maximum RSC sorption capacity was found to be 148.74 mg/L at 30 degrees C. The kinetics of MG sorption on RSC followed the Lagergren's pseudo-first-order model and the overall rate of dye uptake was found to be controlled by external mass transfer at the beginning of adsorption, while intraparticle diffusion controlled the overall rate of adsorption at a later stage. The results indicated that RSC was an attractive adsorbent for removing basic dye from aqueous solutions.

[1]  K W Kolasniski,et al.  ZUR THEORIE DER SOGENANNTEN ADSORPTION GELÖSTER STOFFE. KUNGLIGA SVENSKA VETENSKAPSAKADEMIENS , 2001 .

[2]  Dinesh Mohan,et al.  Single- and multi-component adsorption of cadmium and zinc using activated carbon derived from bagasse--an agricultural waste. , 2002, Water research.

[3]  A. Adamson,et al.  The exchange adsorption of ions from aqueous solutions by organic zeolites; kinetics. , 1947, Journal of the American Chemical Society.

[4]  B. Ohtani,et al.  Photocatalytic decolorization and mineralization of malachite green in an aqueous suspension of titanium(IV) oxide nano-particles under aerated conditions: correlation between some physical properties and their photocatalytic activity , 2003 .

[5]  Shivaji Srivastava,et al.  Toxicological effects of malachite green. , 2004, Aquatic toxicology.

[6]  P. V. Soest.  Rice straw, the role of silica and treatments to improve quality , 2006 .

[7]  A. Mittal,et al.  Adsorption kinetics of removal of a toxic dye, Malachite Green, from wastewater by using hen feathers. , 2006, Journal of hazardous materials.

[8]  I. D. Mall,et al.  Adsorptive removal of malachite green dye from aqueous solution by bagasse fly ash and activated carbon-kinetic study and equilibrium isotherm analyses , 2005 .

[9]  A. Alexander,et al.  Structure of monolayer dye films studied by Brewster angle cavity ringdown spectroscopy , 2003 .

[10]  R. Schnick.  The Impetus to Register New Therapeutants for Aquaculture , 1988 .

[11]  P. Janoš,et al.  Effects of surfactants on the adsorptive removal of basic dyes from water using an organomineral sorbent-iron humate. , 2005, Journal of colloid and interface science.

[12]  D. J. Hills,et al.  Anaerobic digestion of dairy manure and field crop residues , 1981 .

[13]  A. Trovó,et al.  Influence of the iron source on the solar photo-Fenton degradation of different classes of organic compounds , 2005 .

[14]  B. Kumar,et al.  Utilization of fluidized bed reactor for the production of adsorbents in removal of malachite green , 2006 .

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

[16]  Irving Langmuir.  THE CONSTITUTION AND FUNDAMENTAL PROPERTIES OF SOLIDS AND LIQUIDS. PART I. SOLIDS. , 1916 .

[17]  Gordon McKay,et al.  The kinetics of sorption of basic dyes from aqueous solution by sphagnum moss peat , 1998 .

[18]  Mohammad J. Taherzadeh,et al.  Conversion of rice straw to sugars by dilute-acid hydrolysis , 2006 .

[19]  Y. Onal,et al.  Investigation kinetics mechanisms of adsorption malachite green onto activated carbon. , 2007, Journal of hazardous materials.

[20]  S. J. Culp,et al.  Toxicity and metabolism of malachite green and leucomalachite green during short-term feeding to Fischer 344 rats and B6C3F1 mice. , 1999, Chemico-biological interactions.

[21]  A. Mittal,et al.  Adsorption kinetics and column operations for the removal and recovery of malachite green from wastewater using bottom ash , 2004 .

[22]  M. Iqbal,et al.  Adsorption of dyes from aqueous solutions on activated charcoal. , 2007, Journal of hazardous materials.

[23]  A. Mittal,et al.  Removal and recovery of malachite green from wastewater using an agricultural waste material, de-oiled soya , 2005 .

[24]  M. Bouchy,et al.  Decolourization of Textile Industry Wastewater by the Photocatalytic Degradation Process , 2001 .

[25]  S. S. Tahir,et al.  Removal of a cationic dye from aqueous solutions by adsorption onto bentonite clay. , 2006, Chemosphere.

[26]  B. Noroozi,et al.  Equilibrium and kinetic adsorption study of a cationic dye by a natural adsorbent--silkworm pupa. , 2007, Journal of hazardous materials.

[27]  H. Freundlich.  Über die Adsorption in Lösungen , 1907 .

[28]  Vinod Kumar Garg,et al.  Removal of malachite green dye from aqueous solution by adsorption using agro-industry waste: a case study of Prosopis cineraria , 2004 .

[29]  Martyn S. Ray,et al.  Adsorption and adsorptive separations: A review and bibliographical update (1994) , 1996 .

[30]  I. Rahman,et al.  Adsorption characteristics of malachite green on activated carbon derived from rice husks produced by chemical-thermal process. , 2005, Bioresource technology.

[31]  Jian Zhang,et al.  Adsorption of malachite green from aqueous solution onto carbon prepared from Arundo donax root. , 2008, Journal of hazardous materials.

[32]  N. Kiraz,et al.  Photocatalytic performance of Sn-doped TiO2 nanostructured mono and double layer thin films for Malachite Green dye degradation under UV and vis-lights. , 2007, Journal of hazardous materials.

[33]  R. Gong,et al.  Enhanced malachite green removal from aqueous solution by citric acid modified rice straw. , 2006, Journal of hazardous materials.

[34]  Jincai Zhao,et al.  Photo-Fenton degradation of a dye under visible light irradiation , 1999 .

[35]  S. Allen,et al.  Variation of intraparticle diffusion parameter during adsorption of p-chlorophenol onto activated carbon made from apricot stones , 2003 .