DOI QR코드

DOI QR Code

Role of Activated Carbon Modified by H3PO4 and K2CO3 From Natural Adsorbent for Removal of Pb (II) From Aqueous Solutions

  • Manoochehri, Mahboobeh ;
  • Khorsand, Ameneh ;
  • Hashemi, Elham
  • Received : 2012.03.20
  • Accepted : 2012.04.24
  • Published : 2012.07.31

Abstract

Most heavy metals are well-known toxic and carcinogenic agents and when discharged into wastewater represent a serious threat to the human population and the fauna and flora of the receiving water bodies. The present study aims to develop a procedure for Pb (II) removal. This procedure is based on using powdered activated carbon, which was prepared from walnut shells that were generated as plant wastes and modified with potassium carbonate and phosphoric acid as chemical agents. The main parameters, such as effect of pH, effect of sorbent dosage, Pb (II) concentrations, and various contact times influence the sorption process. The experimental results were analyzed by using Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich adsorption models. The kinetic study of Pb (II) on activated carbon from walnut shells was performed based on pseudo- first order and pseudo- second order equations. The data indicate that the adsorption kinetics follow the pseudo- second order rate. The procedure was successfully applied for Pb (II) removal from aqueous solutions.

Keywords

Pb (II);walnut shells;phosphoric acid;potassium carbonate;isotherms

References

  1. Paulino AT, Minasse FAS, Guilherme MR, Reis AV, Muniz EC, Nozaki J. Novel adsorbent based on silkworm chrysalides for removal of heavy metals from wastewaters. J Colloid Interface Sci, 301, 479 (2006). http://dx.doi.org/10.1016/j.jcis.2006.05.032. https://doi.org/10.1016/j.jcis.2006.05.032
  2. Naiya TK, Bhattacharya AK, Das SK. Adsorption of Cd(II) and Pb(II) from aqueous solutions on activated alumina. J Colloid Interface Sci, 333, 14 (2009). http://dx.doi.org/10.1016/j.jcis.2009.01.003. https://doi.org/10.1016/j.jcis.2009.01.003
  3. Davila-Jimenez MM, Elizalde-Gonzalez MaP, Geyer W, Mattusch J, Wennrich R. Adsorption of metal cations from aqueous solution onto a natural and a model biocomposite. Colloids Surf Physicochem Eng Aspects, 219, 243 (2003). http://dx.doi.org/10.1016/ s0927-7757(03)00052-9. https://doi.org/10.1016/S0927-7757(03)00052-9
  4. Wan Ngah WS, Hanafiah MAKM. Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: a review. Bioresour Technol, 99, 3935 (2008). http://dx.doi. org/10.1016/j.biortech.2007.06.011. https://doi.org/10.1016/j.biortech.2007.06.011
  5. Shen W, Chen S, Shi S, Li X, Zhang X, Hu W, Wang H. Adsorption of Cu(II) and Pb(II) onto diethylenetriamine-bacterial cellulose. Carbohydr Polym, 75, 110 (2009). http://dx.doi.org/10.1016/j. carbpol.2008.07.006. https://doi.org/10.1016/j.carbpol.2008.07.006
  6. Langmuir I. The constitution and fundamental properties of solids and liquids. Part I. Solids. J Am Chem Soc, 38, 2221 (1916). http:// dx.doi.org/10.1021/ja02268a002. https://doi.org/10.1021/ja02268a002
  7. Hall KR, Eagleton LC, Acrivos A, Vermeulen T. Pore- and soliddiffusion kinetics in fixed-bed adsorption under constant-pattern conditions. Ind Eng Chem Fundam, 5, 212 (1966). http://dx.doi. org/10.1021/i160018a011. https://doi.org/10.1021/i160018a011
  8. Allen SJ, McKay G, Porter JF. Adsorption isotherm models for basic dye adsorption by peat in single and binary component systems. J Colloid Interface Sci, 280, 322 (2004). http://dx.doi. org/10.1016/j.jcis.2004.08.078. https://doi.org/10.1016/j.jcis.2004.08.078
  9. Lagergren S. About the theory of so-called adsorption of soluble substances. Kungliga Svenska Vetenskapsakademiens Handlingar, 24, 1 (1898).
  10. Hameed BH. Spent tea leaves: a new non-conventional and lowcost adsorbent for removal of basic dye from aqueous solutions. J Hazard Mater, 161, 753 (2009). http://dx.doi.org/10.1016/j. jhazmat.2008.04.019. https://doi.org/10.1016/j.jhazmat.2008.04.019
  11. Kavitha D, Namasivayam C. Experimental and kinetic studies on methylene blue adsorption by coir pith carbon. Bioresour Technol, 98, 14 (2007). http://dx.doi.org/10.1016/j.biortech.2005.12.008. https://doi.org/10.1016/j.biortech.2005.12.008
  12. Kavitha D, Namasivayam C. Recycling coir pith, an agricultural solid waste, for the removal of procion orange from wastewater. Dyes Pigments, 74, 237 (2007). http://dx.doi.org/10.1016/j. dyepig.2006.01.040. https://doi.org/10.1016/j.dyepig.2006.01.040
  13. Ho YS. Citation review of Lagergren kinetic rate equation on adsorption reactions. Scientometrics, 59, 171 (2004). http://dx.doi. org/10.1023/B:SCIE.0000013305.99473.cf. https://doi.org/10.1023/B:SCIE.0000013305.99473.cf
  14. Aharoni C, Sparks DL. Kinetics of soil chemical reactions--a theoretical treatment. In: Sparks DL, ed. Rates of Soil Chemical Processes, Soil Science Society of America, Madison, 1 (1991).
  15. Ho YS. Absorption of Heavy Metals From Waste Streams by Peat [PhD Thesis], University of Birmingham, Birmingham (1995).
  16. Ho YS, McKay G. Sorption of dye from aqueous solution by peat. Chem Eng J, 70, 115 (1998). http://dx.doi.org/10.1016/s0923- 0467(98)00076-1. https://doi.org/10.1016/S0923-0467(98)00076-1
  17. Ho YS, McKay G. Pseudo-second order model for sorption processes. Process Biochem, 34, 451 (1999). http://dx.doi.org/ 10.1016/s0032-9592(98)00112-5. https://doi.org/10.1016/S0032-9592(98)00112-5
  18. Ho YS, McKay G. The kinetics of sorption of divalent metal ions onto sphagnum moss peat. Water Res, 34, 735 (2000). http://dx.doi. org/10.1016/s0043-1354(99)00232-8. https://doi.org/10.1016/S0043-1354(99)00232-8