Parameter First order Second order Elovich model Intraparticle diffusion K1 r2 qe K2 r2 b α r2 kid a r2 pH 3 -0.0112 0.954 32.68 0.0009 0.997 0.144 2.13 0.991 12.15 0.3373 0.992 6 -0.0093 0.922 37.17 0.0010 0.992 0.1508 5.16 0.974 21.93 0.2519 0.988 7 -0.0119 0.961 41.49 0.0021 0.999 0.2031 90.01 0.947 46.94 0.1414 0.949 8 -0.0067 0.812 45.05 0.0003 0.975 0.0992 1.19 0.879 6.7 0.4727 0.951 11 -0.0073 0.722 57.47 0.0001 0.469 0.0954 0.64 0.78 1.94 0.6753 0.912 particlesize (mm) 0.05 -0.0119 0.962 41.49 0.0021 0.999 0.2031 90.01 0.947 46.94 0.1414 0.949 0.125 -0.0062 0.941 34.48 0.0023 0.999 0.2575 95.08 0.967 39.73 0.1344 0.977 0.16 -0.0084 0.877 34.01 0.0015 0.991 0.2020 14.03 0.943 28.53 0.1882 0.962 0.2 -0.0092 0.896 32.68 0.001 0.985 0.1616 11.92 0.961 16.27 0.2802 0.983 0.315 -0.0118 0.977 37.31 0.0003 0.995 0.1123 0.89 0.996 3.65 0.5634 0.982 Adsorbent dose (mg/l) 0.5 -0.0115 0.936 59.52 0.0008 0.995 0.1061 16.68 0.976 22.58 0.2095 0.986 0.75 -0.0111 0.926 42.37 0.0013 0.994 0.1650 20.12 0.943 22.45 0.2724 0.982 1 -0.0107 0.949 32.89 0.002 0.996 0.2304 28.55 0.955 32.29 0.1634 0.965 1.25 -0.0084 0.84 33.01 0.0014 0.986 0.2125 14.41 0.898 35.00 0.1842 0.923 1.5 -0.0119 0.962 27.70 0.0032 0.999 0.3047 60.01 0.947 46.94 0.1414 0.949 Conc.(mg/l) 25 -0.0138 0.989 51.81 0.0003 0.989 0.0784 1.37 0.906 31.00 0.1872 0.97 50 -0.0186 0.926 34.84 0.0012 0.991 0.1676 6.38 0.930 23.67 0.2335 0.938 75 -0.0099 0.977 70.42 0.0002 0.974 0.0605 1.91 0.970 4.93 0.5011 0.983 100 -0.0114 0.953 71.94 0.0002 0.999 0.0587 1.80 0.998 3.88 0.5384 0.991 125 -0.0051 0.996 45.05 0.0003 0.987 0.095 1.355 0.983 2.89 0.4759 0.993 Temp.(°C) 30 -0.0084 0.941 42.02 0.0013 0.996 0.1615 17.44 0.980 35.343 0.1902 0.989 40 -0.0095 0.951 42.37 0.0014 0.997 0.1669 23.51 0.986 38.09 0.1793 0.992 50 -0.0125 0.919 41.67 0.002 0.999 0.213 127.24 0.975 48.85 0.1336 0.977 60 -0.0124 0.907 41.84 0.0022 0.999 0.2145 141.32 0.953 49.63 0.1317 0.955

Table 1: The adsorption kinetic model rate constants.