caa a22 4500 463170385 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10450-007-9004-x doi (NATIONALLICENCE)springer-10.1007/s10450-007-9004-x Two-resistance mass transfer model for the adsorption ofthe pesticide deltamethrin using acid treated oil shale ash [Elektronische Daten] [Z. Al-Qodah, A. Shawaqfeh, W. Lafi] Adsorption characteristics of the pesticides Deltamethrin were studied in aqueous solutions using acid treated Oil Shale Ash (ATOSA) in a series of batch adsorption experiments. The maximum loading capacity of the adsorbent and the rate of adsorption were found to increase with increasing the pesticide initial concentration, mixing speed and were found to decrease with temperature and particle size. Langmuir as well as Freundlich isotherm models fit the adsorption data with R 2>0.97 in all cases. The maximum adsorption capacity for Deltamethrin was 11.4 mg/g. The two-resistance mass transfer model based on the film resistance and homogeneous solid phase diffusion was used to fit the experimental data. A computer program has been developed to estimate the theoretical concentration-time dependent curves and to compare them with the experimental curves by means of the best-fit approach. The model predicts that the external mass transfer coefficient K was affected by varying the initial pesticide concentration, the agitation speed and temperature whereas the diffusion coefficient D was affected by the initial pesticide concentration, and temperature. Springer Science+Business Media, LLC, 2007 Adsorption nationallicence Pesticides nationallicence Oil shale ash adsorption isotherms nationallicence Adsorption capacity nationallicence Langmuir isotherm nationallicence Freundlich isotherm nationallicence Adsorption modeling nationallicence Al-Qodah Z. Department of Chemical Engineering, Al-Balqa Applied University, Marka 11134, P.O. Box 340558, Amman, Jordan aut Shawaqfeh A. Department of Chemical Engineering, Mutah University, P.O. Box 34, 61710, Karak, Jordan aut Lafi W. Department of Chemical Engineering, Al-Balqa Applied University, Marka 11134, P.O. Box 340558, Amman, Jordan aut Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 73-82 0929-5607 13:1<73 2007 13 10450 https://doi.org/10.1007/s10450-007-9004-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9004-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Al-Qodah Z. Department of Chemical Engineering, Al-Balqa Applied University, Marka 11134, P.O. Box 340558, Amman, Jordan aut NATIONALLICENCE 700 1- Shawaqfeh A. Department of Chemical Engineering, Mutah University, P.O. Box 34, 61710, Karak, Jordan aut NATIONALLICENCE 700 1- Lafi W. Department of Chemical Engineering, Al-Balqa Applied University, Marka 11134, P.O. Box 340558, Amman, Jordan aut NATIONALLICENCE 773 0- Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 73-82 0929-5607 13:1<73 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer