REMOVAL OF CHROMIUM(VI) FROM AQUEOUS SOLUTIONS USING SAWDUST AS ADSORBENT
Main Article Content
Abstract
In the present study, a low cost adsorbent is developed from the naturally available sawdust
which is biodegradable. The removal capacity of chromium(VI) from the synthetically prepared
industrial effluent of electroplating and tannery industrial is obtained.
Two modes of operation are used, batch mode and fixed bed mode. In batch experiment the
effect of Sawdust dose (4- 24g/L) with constant initial chromium(VI) concentration of 50 mg/L and
constant particle size less than1.8 mm were studied.
Batch kinetics experiments showed that the adsorption rate of chromium(VI) ion by Sawdust
was rapid and reached equilibrium within 120 min. The three models (Freundlich, Langmuir and
Freundlich-Langmuir) were fitted to experimental data and the goodness of their fit for adsorption
was compared. In the fixed bed isothermal adsorption column, the effect of particle size (dp) (1.09-
1.8) mm, influent flow rate (Q) (1- 4) L/hr, bed depth (H) (25- 35) cm and the pH(1-7)of the
solution were studied .The results show that Sawdust is an efficient adsorbent for the removal of
Cr(VI) from wastewater. Percent removal of chromium reaches (100%) with increasing of contact
time and decreasing the pH.UV- Spectrophotometer was used to determine the metal ion
concentration
Article Details
Section
How to Cite
References
Aggarwal D., Goyal M., Bansal R.C.; Adsorption of Cr(VI)by activated carbon from aqueous solution , carbon 37 (1999)
-1997.
- Aliadadi M., Morshedzadeh K., Soheyli H. ; removal of Cr(VI) from aqueous solution by lignocellulosic solid
wastes , Int. J. Environ . Sci.Technol.3(2006)321-325.
- Babu B.V., Gupta S. ; Adsorption of Cr (VI) using activated neem leaves as an adsorbent ; Kinetic studies , Adsorption
(2008)85-92.
- Baral S ,Das S.N.,Rath P., chaudhury R.; Cr(VI)removal by calcined bauxite , Biochem , Eng.J. 34(2007)69-95.
- Bhattacharya ,A.K. ;"Adsorption , kinetics and equilibrium studies on removal of Cr(VI)from aqueous solutions
using different low-cost adsorbents".Chem.Eng.J.,137(3), .(2008)529-541.
-Boddu V. M.;Abburi K,Talbott J.L.,Smith E.D.,Removal of Cr(VI) from water using a new composite chitosan
biosorbent.Environ.Sci.Tech,37(19),4449- 4456(2003)
- Chen H.; Adsorptive removal of Cr(VI)by Fe modified steam exploded wheat straw , Proc. Biochem.39(2004)541-545.
- Chen J.M.N., Hao O .J.N. ; Microbial Cr(VI) reduction , Critical reviews , Environ. Sci, Tecchnol.28(1998)219-251.
- Contreras S.M.,(2004)"Composting of tannery effluent with cow manure and wheat straw,Bioresour.Technol.94,223-
- Dakiky M., Khamis M., Manassra A.M. ;"Selective adsorption of Chromium(VI) in industrial wastewater
using low-cost abundantly available adsorbents,Environ.Res.6(2002)533-540.
- Dokken K. ; Gamez G; Herrera I. ; Tiemann K. ; Pingitore N.E.;Chianelli R.R. ; Gardea Torresdey
S.L;"Characterization of Chromium Cr (VI) bioreduction and Chromium (III)binding to alfalfa biomass'. In proccedings of 1999 conference on hazardous waste research, Snowbird , Utah, (1999)101-113.
- Jianlong W., Xinmin Z,;Removal of Cr(VI)from aqueous solution by macroporous resin adsorption , J. Environ .Sci.
Health A35(2000)1211-1230.
- Kim J.G., Kim J.H., Moon H.S., Chon C.M. and Ahn J.S.; "Removal Capacity of Water Plant Alum Sludge
for Phosphorus in Aqueous Solutions", Chemical Speciation and Bioavailability, 14, 2003, pp 67-73.
- Kozloovski A. , Walkowiak; removal of Cr(VI)from aqueous solution by polymer inclusion membrances, Water Res.36(2002)4870-4876.
- Kumar R., Bishnoi N.R.; Biosorption of Cr(VI) from aqueous solution and electroplating wastewater using fungal
biomass, Chem. Eng.135(2008)202-208.
- Kumar P.A. , Manabenra R. , Chakraborty S.; "Cr(VI) Removal from wastewater using aniline formaldehyde
condensate coated silica gel,J.Hazard.Mater.143(2007).
- Roundhill D.M., Koch H.F.;Methods and techniques for the selective extraction and recovery of oxoanions,
Chem.Soc.Rev.31(2002)60-67.
- Malkoc E. and Nuhoglu; "Fixed Bed Studies for the Sorption of Chromium (VI) onto Tea Factory Waste",
Chemical Engineering Science,V.61 (2006)pp4363-4372.
- Mohan D.,Singh K.P.,Singh V.K. ; removal of Cr(VI)from aqueous solution using low-cost activated carbons derived
from agricultural waste materials and activated carbon fabric cloth , Ind.Eng.Chem.Res.44(2005)1027-1042.
- Selvaraj ,K. ,Manonmani, S.(2003)"Removal of Cr(VI)using distillery sluge". Bioresour. Technol. 89, 207-211.
- Shukla S.S., Kenneth L.D., Shukla A., Margrave J.L.;Adsorption of Chromium from aqueous solutions by maple
sawdust,J.Hazard.Mater.B 100(2003)53-63.
- Sips R., 1984, J. Chem. Phys., 16, pp 490-495.
- Uysal M, Irfan A.;Removal of Cr(VI)from industrial wastewaters by adsorption , J. Hazard. Mater.149(2007)482-491.
- Venkateswaran , P. ; "Speciation of heavy metals in electroplating industry sludge and wastewater residue using
inductively coupled plasma" Int.J.Environ.Sci.Tech.,4(4), (2007)497-504.
- Vinodhini V. ; N. Das "Relvant approach to assess the performance of sawdust as adsorbent of Chromium (VI)
ions from aqueous solutions. , Int. J. Environ. Sci Tech.,7(1),85-92,(2010).
- Weber, J. R. and Walter, J., 1972, "Physicochemical Processes for Water Quality Control", Wiley-Interscience,
New York.