A two stage batch adsorber design for methylene blue removal to minimize contact time.

The adsorption of methylene blue onto bentonite in a batch adsorber has been studied. Three kinetic models, the intraparticle diffusion equation and the pseudo first and second order equations, were selected to follow the adsorption process. Kinetic parameters, rate constants, equilibrium adsorption capacities and related correlation coefficients for each kinetic model were calculated and discussed. It was shown that the adsorption of methylene blue onto bentonite could be described by the pseudo second order equation. Adsorption of methylene blue onto bentonite followed the Langmuir isotherm. A model has been developed for the design of a two stage batch adsorber based on pseudo second order adsorption kinetics. The model has been optimized with respect to operating time in order to minimize total contact time to achieve a specified amount of methylene blue removal using a fixed mass of adsorbent. The results of two stage batch adsorber design studies showed that the required times for specified amounts of methylene blue removal significantly decreased. This design is particularly suitable for low-cost adsorbents/adsorption systems when minimising contact time is a major operational and design criterion and a significant volume of effluent needs to be treated in the minimum amount of time.

[1]  M. Muhler,et al.  Adsorptive removal of methylene blue from colored effluents on fuller's earth. , 2003, Journal of colloid and interface science.

[2]  M. S. Viciana,et al.  Adsorption of chlorophyll‐a from acetone solution on natural and activated bentonite , 1994 .

[3]  M. Özacar,et al.  Application of kinetic models to the sorption of disperse dyes onto alunite , 2004 .

[4]  A. Zaki,et al.  Adsorption and kinetic studies of the intercalation of some organic compounds onto Na+-montmorillonite. , 2002, Journal of colloid and interface science.

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

[6]  S. Allen,et al.  The removal of dyes from textile wastewater: a study of the physical characteristics and adsorption mechanisms of diatomaceous earth. , 2003, Journal of environmental management.

[7]  M. Özacar,et al.  A kinetic study of metal complex dye sorption onto pine sawdust , 2005 .

[8]  Krishna G. Bhattacharyya,et al.  ADSORPTION OF METHYLENE BLUE ON KAOLINITE , 2002 .

[9]  M. Özacar,et al.  Adsorption of reactive dyes on calcined alunite from aqueous solutions. , 2003, Journal of hazardous materials.

[10]  Arbeloa.  Spectroscopy of Rhodamine 6G Adsorbed on Sepiolite Aqueous Suspensions , 1997, Journal of colloid and interface science.

[11]  C. Bilgiç,et al.  Investigation of the factors affecting organic cation adsorption on some silicate minerals. , 2005, Journal of colloid and interface science.

[12]  James A. Smith,et al.  Adsorptive selectivity of organic-cation-modified bentonite for nonionic organic contaminants , 1994 .

[13]  Su Lin,et al.  Adsorption of acid dye from water onto pristine and acid-activated clays in fixed beds. , 2004, Journal of hazardous materials.

[14]  M. Neumann,et al.  Time-Dependent Spectrophotometric Study of the Interaction of Basic Dyes with Clays: III. Mixed Dye Aggregates on SWy-1 and Laponite , 1998 .

[15]  R. Shawabkeh,et al.  Experimental study and modeling of basic dye sorption by diatomaceous clay , 2003 .

[16]  A. Gürses,et al.  Determination of adsorptive properties of clay/water system: methylene blue sorption. , 2004, Journal of colloid and interface science.

[17]  Y. Ho,et al.  Sorption Studies of Acid Dye by Mixed Sorbents , 2001 .

[18]  M. Özacar.  Equilibrium and Kinetic Modelling of Adsorption of Phosphorus on Calcined Alunite , 2003 .

[19]  Feng-Chin Wu,et al.  The Ability of Activated Clay for the Adsorption of Dyes from Aqueous Solutions , 1997 .

[20]  N. Kannan,et al.  Kinetics and mechanism of removal of methylene blue by adsorption on various carbons—a comparative study , 2001 .

[21]  M. Özacar,et al.  Phosphate adsorption characteristics of alunite to be used as a cement additive , 2003 .

[22]  David Christian Rodrı́guez-Sarmiento,et al.  Adsorption of sodium dodecylbenzene sulfonate on organophilic bentonites , 2001 .

[23]  Carla C Schmitt,et al.  Influence of the layer charge and clay particle size on the interactions between the cationic dye methylene blue and clays in an aqueous suspension. , 2002, Journal of colloid and interface science.

[24]  M. Özacar,et al.  Equilibrium data and process design for adsorption of disperse dyes onto Alunite , 2004 .

[25]  Y. Ho,et al.  A Two-Stage Batch Sorption Optimized Design for Dye Removal to Minimize Contact Time , 1998 .

[26]  M. Özacar,et al.  Two-stage batch sorber design using second-order kinetic model for the sorption of metal complex dyes onto pine sawdust , 2004 .

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

[28]  Lizhong Zhu,et al.  Use of Cetyltrimethylammonium Bromide-Bentonite To Remove Organic Contaminants of Varying Polar Character from Water , 1998 .

[29]  J. Samper,et al.  Solute transport properties of compacted Ca-bentonite used in FEBEX project. , 2001, Journal of contaminant hydrology.

[30]  D. Song,et al.  An Investigation of the Adsorption of Organic Dyes onto Organo-Montmorillonite , 2001, Environmental technology.

[31]  Y. Ho,et al.  Pseudo-second order model for sorption processes , 1999 .

[32]  Ahmet Gürses,et al.  Investigation of applicability of the various adsorption models of methylene blue adsorption onto lignite/water interface , 2005 .

[33]  A. Gemeay.  Adsorption characteristics and the kinetics of the cation exchange of rhodamine-6G with Na+-montmorillonite. , 2002, Journal of colloid and interface science.

[34]  Y. H. Shen.  Preparations of organobentonite using nonionic surfactants. , 2001, Chemosphere.

[35]  Carla C Schmitt,et al.  Time-Dependent Spectrophotometric Study of the Interaction of Basic Dyes with Clays II: Thionine on Natural and Synthetic Montmorillonites and Hectorites , 1996 .

[36]  M. Özacar,et al.  Adsorption of Acid Dyes from Aqueous Solutions by Calcined Alunite and Granular Activated Carbon , 2002 .

[37]  N. Miyamoto,et al.  Adsorption and aggregation of a cationic cyanine dye on layered clay minerals , 2000 .

[38]  S. Kawatra,et al.  Developing and understanding the bentonite fiber bonding mechanism , 2001 .

[39]  J. Lee,et al.  Adsorption of basic dyes onto montmorillonite. , 2004, Journal of colloid and interface science.

[40]  C. Namasivayam,et al.  Removal of direct red 12B and methylene blue from water by adsorption onto Fe (III)/Cr (III) hydroxide, an industrial solid waste. , 2005, Journal of environmental management.