Isotherms for the sorption of lead onto peat: comparison of linear and non-linear methods

• Autorzy: Ho Y S
• Języki publikacji: EN

Abstrakty

EN

A comparison of the linear least-squares method and a trial-and-error non-linear method of three widely used isotherms (the Langmuir, Freundlich, and Redlich-Peterson) were examined in an experiment using lead ion sorption onto peat at different temperatures. The four Langmuir linear equations are discussed. Langmuir isotherm parameters obtained from the four Langmuir linear equations using the linear method differed but they were the same when using the non-linear method. Langmuir-1 is the most popular linear form, and it had the highest coefficient of determination compared with the other Langmuir linear equations. The Redlich-Peterson and Langmuir isotherms produced higher coefficients of determination. There are two separate regions depicting the Freundlich isotherm. The results show that that non-linear method may be a better way to obtain the parameters.

Słowa kluczowe

EN

temperature; linear method; nonlinear method; isotherm; lead; peat; adsorption

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2006
• Tom: 15
• Numer: 1
• Opis fizyczny: p.81-86,fig.,ref.

Twórcy

autor

Ho Y S

• Peking University, Beijing 100871, People's Republic of China

Bibliografia

• 1. HO Y.S., PORTER J.F., MCKAY G. Equilibrium isotherm studies for the sorption of divalent metal ions onto peat: Copper, nickel and lead single component systems, Water Air Soil Pollut., 141, 1, 2002.
• 2. ALLEN S.J., GAN Q., MATTHEWS R., JOHNSON P.A. Comparison of optimised isotherm models for basic dye adsorption by kudzu. Bioresour. Technol., 88, 143, 2003.
• 3. HO Y.S. Selection of optimum sorption isotherm. Carbon, 42, 2115, 2004.
• 4. LANGMUIR I. The constitution and fundamental properties of solids and liquids. J. Am. Chem. Soc., 38, 2221, 1916.
• 5. FREUNDLICH H.M.F. Über die adsorption in lösungen. Z. Phys. Chem-Frankfurt, 57A, 385, 1906.
• 6. REDLICH O., PETERSON D.L. A useful adsorption isotherm. J. Phys. Chem., 63, 1024, 1959.
• 7. KINNIBURGH D.G. General purpose adsorption isotherms. Environ. Sci. Technol., 20, 895, 1986.
• 8. LONGHINOTTI E., POZZA F., FURLAN L., SANCHEZ M.D.N.D., KLUG M., LARANJEIRA M.C.M., FAVERE V.T. Adsorption of anionic dyes on the biopolymer chitin. J. Braz. Chem. Soc., 9, 435, 1998.
• 9. YADAVA K.P., TYAGI B.S., SINGH V.N. Effect of temperature on the removal of lead(II) by adsorption on china clay and wollastonite. J. Chem. Technol. Biotechnol., 51, 47, 1991.
• 10. BEREKET G., AROĞUZ A.Z., ÖZEL M.Z. Removal of Pb(II), Cd(II), Cu(II), and Zn(II) from aqueous solutions by adsorption on bentonite. J. Colloid Interface Sci., 187, 338, 1997.
• 11. GUPTA V.K. Equilibrium uptake, sorption dynamics, process development, and column operations for the removal of copper and nickel from aqueous solution and wastewater using activated slag, a low-cost adsorbent. Ind. Eng. Chem. Res., 37, 192, 1998.