Application of Kinetic Models to the Sorption of Copper(II) on to Peat

Adsorption Science and Technology - Tập 20 Số 8 - Trang 797-815 - 2002
Yuh‐Shan Ho1, Gordon McKay1
1Department of Chemical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China

Tóm tắt

A comparison of the kinetics of the sorption of copper(II) on to peat from aqueous solution at various initial copper(II) concentrations and peat doses was made. The Elovich model and the pseudo-second order model both provided a high degree of correlation with the experimental data for most of the sorption process. There was a small discrepancy at the initial stages of sorption which suggested that film diffusion or wetting of the peat may be involved in the early part of the sorption process. Models evaluated included the fractional power equation, the Elovich equation, the pseudo-first order equation and the pseudo-second order equation. The kinetics of sorption were followed based on the sorption capacity of copper(II) on peat at various time intervals. Results show that chemical sorption processes may be rate-limiting in the sorption of copper(II) on to peat during agitated batch contact time experiments. The rate constant, the equilibrium sorption capacity and the initial sorption rate were calculated. From these parameters, an empirical model for predicting the concentrations of metal ions sorbed was derived.

Từ khóa


Tài liệu tham khảo

Aharoni C., Sparks D.L. (1991) Rates of Soil Chemical Processes, Sparks D.L., Suarez D.L., Eds, Soil Sci. Soc. Am., Madison, WI, pp. 1–18.

10.1039/f19767200400

Aho M., 1984, Suo, 35, 47

Allen S.J., 1987, J. Sep. Process Technol., 8, 18

10.1016/0269-7491(88)90106-6

10.1002/jctb.280540310

Atun G., 1996, J. Environ. Sci. Health A, 31, 2055

Averett R.C., Leenheer J.A., McKnight D.M., Thorn K.A. (1994) Humic Substances in the Suwanne River, Georgia: Interactions, Properties and Proposed Structure, US Government Printing Office, Washington, DC, pp. 224–233.

10.1080/09593338909384723

10.2136/sssaj1981.03615995004500060048x

10.1111/j.1365-2389.1974.tb01146.x

10.1111/j.1365-2389.1976.tb01972.x

10.1016/0043-1354(90)90080-P

10.2136/sssaj1980.03615995004400020013x

10.1126/science.123.3191.330

10.1016/0045-6535(96)00244-5

10.1016/0043-1354(76)90038-5

10.1002/1521-4109(200201)14:1<71::AID-ELAN71>3.0.CO;2-B

10.1080/00103627409366531

10.1366/0003702963905169

10.1021/i160046a009

10.1002/aic.690200111

Gangiotti L., 1986, Research Report on pH Dependence of Copper Fixation on Peat

10.1016/0043-1354(86)90209-5

Kadlec R.H., Keoleian G.A. (1986) Peat and Water, Fuchsman C.H., Ed, Elsevier Applied Science Publishers, London/New York, pp. 61–93.

Lalancette J.M. (1974) US Pat. 3 790 370.

10.1021/es9708979

10.1021/cr60205a003

10.1002/jctb.5030320712

10.1002/cjce.5450580416

McKay G., 1983, J. Sep. Process Technol., 4, 1

10.1002/cjce.5450620308

10.1021/i200025a005

10.1016/S0045-6535(96)00384-0

10.1016/0043-1354(85)90145-9

10.1016/0045-6535(95)00332-0

10.1016/0043-1354(76)90036-1

10.1016/S0043-1354(01)00431-6

10.1006/jcis.1993.1179

Schnitzer M. (1978) Soil Organic Matter, Schnitzer M., Khan S.U., Eds, Elsevier, New York, pp. 47–52.

Schnitzer M., 1972, Humic Substances in the Environment

10.1016/0927-7757(95)03468-4

10.1346/CCMN.1996.0440104

10.1071/S96008

Sparks D.L. (Ed) (1986) Soil Physical Chemistry, CRC Press, Boca Raton, FL, pp. 83–145.

10.2136/sssaj1991.03615995005500060014x

10.1080/00103629509369407

10.1016/0927-7757(96)03546-7

10.1016/0016-7061(76)90077-X

Zhipei Z., Junlu Y., Zengnui W., Piya C. (1984) Proc. 7th Int. Peat Congr., Dublin, Ireland, Vol. 3, pp. 147–152.

Thông tin
Thông tin xuất bản

Adsorption Science and Technology

Tập 20 Số 8

797-815

Thông tin tác giả