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Tham khảo tài liệu 'waste water treatment and reutilization 2011 part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Application of Luffa Cylindrica in Natural form as Biosorbent to Removal of Divalent Metals from Aqueous Solutions - Kinetic and Equilibrium Study 205 Kinetic model Parameters Metal ions M2 Cu Pb Zn Ni Pseudo- qe mg g 0.1886 0.9843 0.1100 0.1141 First order k g mg min 0.1044 0.1720 0.1364 0.0240 r2 0.9819 0.9991 0.9947 0.9556 Pseudo- qe mg g 0.2002 1.0004 0.1138 0.1490 Second k 2 g mg min 1.1300 0.9183 3.7011 0.1522 order r2 0.9883 0.9997 0.9977 0.9666 Intra- k mg g min0.5 0.0168 0.0824 0.0094 0.0102 particle C mg g 0.0419 0.2691 0.0278 0.0026 diffusion r2 0.7933 0.6989 0.7401 0.9752 Elovich a mg g mm p g mg 10.2050 56.7641 1.292E 13 38.7968 7649.602 167.0520 0.0070 29.3910 r2 0.7375 0.9704 0.8709 0.9054 Avrami Kav min-1 0.3228 0.5434 0.3374 -0.1163 nav 0.3235 0.5434 0.4042 -0.2064 qe mg g 0.1886 0.9794 0.1099 0.1141 r2 0.9819 0.9983 0.9947 0.9556 Table 5. Kinetic model rate parameters obtained using the nonlinear methods. Isotherm Metal ions M2 Parameters v 1 Cu Ni Pb Zn Langmuir Qmax 2.26E 04 8.20E 03 1.36E 05 2.89E 04 Kl 1.4580 7.01E-06 8.32E-06 3.00E-05 r2 0.4922 0.3518 0.6571 0.8576 Freudlich Kf 0.2519 0.0015 0.2544 1.3655 n 0.5897 0.2121 0.3846 0.6801 r2 0.5381 0.9231 0.7189 0.9212 Sips Qmax 1.19E 04 1.59E 03 7.90E 04 1.14E 04 Ks 0.5897 9.51E-07 3.22E-06 1.20E-04 n 2.11E-05 0.2120 0.3845 0.6801 r2 0.5381 0.9231 0.7189 0.9212 Redlich- Arp -0.5421 -0.2936 -0.2525 -1.0178 Peterson Krp 0.0458 0.0117 0.3875 0.5072 g 1.0000 1.0000 1.0000 1.0000 r2 0.7449 0.9632 0.8218 0.9539 Table 6. Equilibrium isotherm parameters obtained using the nonlinear methods. 206 Waste Water - Treatment and Reutilization 3.2 Discussion Table 3 show the surface area and pore diameter range for the biosorbent used for this study. The Specific surface area using the BET method was 0.28m2 g and the Pore diameter range was between 1051.309204 to 0.003577pm. As observed the surface area for the seed and sponge mixture of L. cylindrica is relatively low with pore diameter values in .
