Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (8): 1761.doi: 10.7503/cjcu20140037
• Physical Chemistry • Previous Articles Next Articles
LI Bing1, DONG Yongchun1,2,*()
Received:
2014-01-13
Online:
2014-08-10
Published:
2019-08-01
Contact:
DONG Yongchun
E-mail:teamdong@sina.cn
Supported by:
CLC Number:
TrendMD:
LI Bing, DONG Yongchun. Coordination Kinetics of Different Carboxylic Fiber with Fe3+ and Catalytic Degradation Performance of Their Fe3+ Complexes†[J]. Chem. J. Chinese Universities, 2014, 35(8): 1761.
Carboxylic fiber | ACOOH/(mmol·g-1) | Specific surface area/(m2·g-1) | Water contact angle/(°) |
---|---|---|---|
Alginate fiber | 2.23 | 0.286 | 48.3 |
PAA-g-PP | 2.27 | 0.251 | 85.8 |
PAA-g-PTFE | 2.35 | 0.178 | 91.1 |
Table 1 ACOOH values and surface properties of three carboxylic fibers
Carboxylic fiber | ACOOH/(mmol·g-1) | Specific surface area/(m2·g-1) | Water contact angle/(°) |
---|---|---|---|
Alginate fiber | 2.23 | 0.286 | 48.3 |
PAA-g-PP | 2.27 | 0.251 | 85.8 |
PAA-g-PTFE | 2.35 | 0.178 | 91.1 |
Fiber | Temperature/℃ | Linear regression equation | kL/(L·mmol-1) | Qm/(mmol·g-1) | r2 |
---|---|---|---|---|---|
Alginate fiber | 50 | Qe=0.4389ce/(1+0.1389ce) | 0.1389 | 3.16 | 0.9877 |
35 | Qe=0.2708ce/(1+0.1231ce) | 0.1231 | 2.20 | 0.9856 | |
20 | Qe=0.1158ce/(1+1.1007ce) | 0.1007 | 1.15 | 0.9898 | |
PAA-g-PP | 50 | Qe=0.1400ce/(1+0.0625ce) | 0.0625 | 2.24 | 0.9862 |
35 | Qe=0.0705ce/(1+0.0538ce) | 0.0538 | 1.31 | 0.9933 | |
20 | Qe=0.0367ce/(1+0.00448ce) | 0.0448 | 0.82 | 0.9861 | |
PAA-g-PTFE | 50 | Qe=0.1195ce/(1+0.0561ce) | 0.0561 | 2.13 | 0.9930 |
35 | Qe=0.0489ce/(1+0.0457ce) | 0.0457 | 1.07 | 0.9962 | |
20 | Qe=0.0212ce/(1+0.0365ce) | 0.0365 | 0.58 | 0.9876 |
Table 2 Parameters and equations for Langmuir adsorption isothermals of Fe3+ onto three carboxylic fibers
Fiber | Temperature/℃ | Linear regression equation | kL/(L·mmol-1) | Qm/(mmol·g-1) | r2 |
---|---|---|---|---|---|
Alginate fiber | 50 | Qe=0.4389ce/(1+0.1389ce) | 0.1389 | 3.16 | 0.9877 |
35 | Qe=0.2708ce/(1+0.1231ce) | 0.1231 | 2.20 | 0.9856 | |
20 | Qe=0.1158ce/(1+1.1007ce) | 0.1007 | 1.15 | 0.9898 | |
PAA-g-PP | 50 | Qe=0.1400ce/(1+0.0625ce) | 0.0625 | 2.24 | 0.9862 |
35 | Qe=0.0705ce/(1+0.0538ce) | 0.0538 | 1.31 | 0.9933 | |
20 | Qe=0.0367ce/(1+0.00448ce) | 0.0448 | 0.82 | 0.9861 | |
PAA-g-PTFE | 50 | Qe=0.1195ce/(1+0.0561ce) | 0.0561 | 2.13 | 0.9930 |
35 | Qe=0.0489ce/(1+0.0457ce) | 0.0457 | 1.07 | 0.9962 | |
20 | Qe=0.0212ce/(1+0.0365ce) | 0.0365 | 0.58 | 0.9876 |
Fiber | Temperature/℃ | Linear regression equation | n | kF | r2 |
---|---|---|---|---|---|
Alginate fiber | 50 | Qe=0.8929 | 3.720 | 0.8929 | 0.9258 |
35 | Qe=0.6090 | 3.697 | 0.6090 | 0.9579 | |
20 | Qe=0.3050 | 3.671 | 0.3050 | 0.9733 | |
PAA-g-PP | 50 | Qe=0.3707 | 2.664 | 0.3707 | 0.9710 |
35 | Qe=0.1998 | 2.656 | 0.1998 | 0.9530 | |
20 | Qe=0.1051 | 2.460 | 0.1051 | 0.9464 | |
PAA-g-PTFE | 50 | Qe=0.3103 | 2.565 | 0.3103 | 0.9682 |
35 | Qe=0.0137 | 2.452 | 0.1376 | 0.9750 | |
20 | Qe=0.0640 | 2.356 | 0.0640 | 0.9465 |
Table 3 Parameters and equations for Freundlich adsorption isothermals of Fe3+ onto three carboxylic fibers
Fiber | Temperature/℃ | Linear regression equation | n | kF | r2 |
---|---|---|---|---|---|
Alginate fiber | 50 | Qe=0.8929 | 3.720 | 0.8929 | 0.9258 |
35 | Qe=0.6090 | 3.697 | 0.6090 | 0.9579 | |
20 | Qe=0.3050 | 3.671 | 0.3050 | 0.9733 | |
PAA-g-PP | 50 | Qe=0.3707 | 2.664 | 0.3707 | 0.9710 |
35 | Qe=0.1998 | 2.656 | 0.1998 | 0.9530 | |
20 | Qe=0.1051 | 2.460 | 0.1051 | 0.9464 | |
PAA-g-PTFE | 50 | Qe=0.3103 | 2.565 | 0.3103 | 0.9682 |
35 | Qe=0.0137 | 2.452 | 0.1376 | 0.9750 | |
20 | Qe=0.0640 | 2.356 | 0.0640 | 0.9465 |
Fig.3 Coordination kinetics curves at different initial concentrations of Fe3+ on alginate(A), PAA-g-PP(B) and PAA-g-PTFE fibers(C) Initial concentration of Fe3+/(mmol·L-1): a. 30; b. 60; c. 90; d. 120.
Fig.4 Simulation curves of Lagergren pseudo first-order equation plots on alginate(A), PAA-g-PP(B) and PAA-g-PTFE fibers(C) Initial concentration of Fe3+/(mmol·L-1): a. 30; b. 60; c. 90; d. 120.
Fiber | c0/(mmol ·L-1) | Rate equation | k1 | r2 |
---|---|---|---|---|
Alginate fiber | 30 | ln(1-F)=-0.0628t | 0.0628 | 0.9807 |
60 | ln(1-F)=-0.0517t | 0.0517 | 0.9833 | |
90 | ln(1-F)=-0.0417t | 0.0417 | 0.9907 | |
120 | ln(1-F)=-0.0387t | 0.0387 | 0.9852 | |
PAA-g-PP | 30 | ln(1-F)=-0.0437t | 0.0437 | 0.9916 |
60 | ln(1-F)=-0.0353t | 0.0353 | 0.9940 | |
90 | ln(1-F)=-0.0336t | 0.0336 | 0.9975 | |
120 | ln(1-F)=-0.0316t | 0.0316 | 0.9962 | |
PAA-g-PTFE | 30 | ln(1-F)=-0.0380t | 0.0380 | 0.9967 |
60 | ln(1-F)=-0.0223t | 0.0323 | 0.9989 | |
90 | ln(1-F)=-0.0305t | 0.0305 | 0.9989 | |
120 | ln(1-F)=-0.0281t | 0.0281 | 0.9984 |
Table 4 Results from linear regression of Lagergren pseudo first-order equation plots
Fiber | c0/(mmol ·L-1) | Rate equation | k1 | r2 |
---|---|---|---|---|
Alginate fiber | 30 | ln(1-F)=-0.0628t | 0.0628 | 0.9807 |
60 | ln(1-F)=-0.0517t | 0.0517 | 0.9833 | |
90 | ln(1-F)=-0.0417t | 0.0417 | 0.9907 | |
120 | ln(1-F)=-0.0387t | 0.0387 | 0.9852 | |
PAA-g-PP | 30 | ln(1-F)=-0.0437t | 0.0437 | 0.9916 |
60 | ln(1-F)=-0.0353t | 0.0353 | 0.9940 | |
90 | ln(1-F)=-0.0336t | 0.0336 | 0.9975 | |
120 | ln(1-F)=-0.0316t | 0.0316 | 0.9962 | |
PAA-g-PTFE | 30 | ln(1-F)=-0.0380t | 0.0380 | 0.9967 |
60 | ln(1-F)=-0.0223t | 0.0323 | 0.9989 | |
90 | ln(1-F)=-0.0305t | 0.0305 | 0.9989 | |
120 | ln(1-F)=-0.0281t | 0.0281 | 0.9984 |
Fig.5 Simulation curves of Lagergren pseudo second-order equation plots on alginate(A), PAA-g-PP(B) and PAA-g-PTFE fibers(C) Initial concentration of Fe3+/(mmol·L-1): a. 30; b. 60; c. 90; d. 120.
Fiber | c0/(mmol·L-1) | Rate equation | k2 | Qe/(mmol·g-1) | r2 |
---|---|---|---|---|---|
Alginatefiber | 30 | t/Qt=2.470+t/2.28 | 0.0781 | 2.28 | 0.9985 |
60 | t/Qt=2.943+t/2.64 | 0.0487 | 2.64 | 0.9991 | |
90 | t/Qt=2.979+t/3.04 | 0.0364 | 3.04 | 0.9986 | |
120 | t/Qt=3.096+t/3.32 | 0.0293 | 3.32 | 0.9985 | |
PAA-g-PP | 30 | t/Qt=8.941+t/1.37 | 0.0598 | 1.37 | 0.9947 |
60 | t/Qt=9.936+t/1.80 | 0.0311 | 1.80 | 0.9983 | |
90 | t/Qt=9.020+t/2.09 | 0.0255 | 2.09 | 0.9970 | |
120 | t/Qt=9.898+t/2.42 | 0.0173 | 2.42 | 0.9976 | |
PAA-g-PTFE | 30 | t/Qt=12.665+t/1.40 | 0.0404 | 1.40 | 0.9962 |
60 | t/Qt=12.726+t/1.71 | 0.0268 | 1.71 | 0.9968 | |
90 | t/Qt=11.838+t/2.01 | 0.0209 | 2.01 | 0.9986 | |
120 | t/Qt=11.628+t/2.29 | 0.0164 | 2.29 | 0.9984 |
Table 5 Results from linear regression of Lagergren pseudo second-order equation plots
Fiber | c0/(mmol·L-1) | Rate equation | k2 | Qe/(mmol·g-1) | r2 |
---|---|---|---|---|---|
Alginatefiber | 30 | t/Qt=2.470+t/2.28 | 0.0781 | 2.28 | 0.9985 |
60 | t/Qt=2.943+t/2.64 | 0.0487 | 2.64 | 0.9991 | |
90 | t/Qt=2.979+t/3.04 | 0.0364 | 3.04 | 0.9986 | |
120 | t/Qt=3.096+t/3.32 | 0.0293 | 3.32 | 0.9985 | |
PAA-g-PP | 30 | t/Qt=8.941+t/1.37 | 0.0598 | 1.37 | 0.9947 |
60 | t/Qt=9.936+t/1.80 | 0.0311 | 1.80 | 0.9983 | |
90 | t/Qt=9.020+t/2.09 | 0.0255 | 2.09 | 0.9970 | |
120 | t/Qt=9.898+t/2.42 | 0.0173 | 2.42 | 0.9976 | |
PAA-g-PTFE | 30 | t/Qt=12.665+t/1.40 | 0.0404 | 1.40 | 0.9962 |
60 | t/Qt=12.726+t/1.71 | 0.0268 | 1.71 | 0.9968 | |
90 | t/Qt=11.838+t/2.01 | 0.0209 | 2.01 | 0.9986 | |
120 | t/Qt=11.628+t/2.29 | 0.0164 | 2.29 | 0.9984 |
Fig.6 Simulation curves of intra-particle diffusion equation plots on alginate(A), PAA-g-PP(B) and PAA-g-PTFE(C) fibers Initial concentration of Fe3+/(mmol·L-1): a. 30; b. 60; c. 90; d. 120.
Fiber | c0/(mmol·L-1) | Rate equation | kp | r2 |
---|---|---|---|---|
Alginate fiber | 30 | Qt=0.3121t1/2 | 0.3121 | 0.9486 |
60 | Qt=0.3414t1/2 | 0.3415 | 0.9597 | |
90 | Qt=0.3428t1/2 | 0.3428 | 0.9787 | |
120 | Qt=0.3637t1/2 | 0.3637 | 0.9771 | |
PAA-g-PP | 30 | Qt=0.1816t1/2 | 0.1816 | 0.9692 |
60 | Qt=0.2176t1/2 | 0.2176 | 0.9861 | |
90 | Qt=0.2436t1/2 | 0.2436 | 0.9957 | |
120 | Qt=0.2693t1/2 | 0.2693 | 0.9983 | |
PAA-g-PTFE | 30 | Qt=0.1767t1/2 | 0.1767 | 0.9943 |
60 | Qt=0.2008t1/2 | 0.2008 | 0.9952 | |
90 | Qt=0.2287t1/2 | 0.2287 | 0.9991 | |
120 | Qt=0.2466t1/2 | 0.2466 | 0.9995 |
Table 6 Results from linear regression of intra-particle diffusion equation plots
Fiber | c0/(mmol·L-1) | Rate equation | kp | r2 |
---|---|---|---|---|
Alginate fiber | 30 | Qt=0.3121t1/2 | 0.3121 | 0.9486 |
60 | Qt=0.3414t1/2 | 0.3415 | 0.9597 | |
90 | Qt=0.3428t1/2 | 0.3428 | 0.9787 | |
120 | Qt=0.3637t1/2 | 0.3637 | 0.9771 | |
PAA-g-PP | 30 | Qt=0.1816t1/2 | 0.1816 | 0.9692 |
60 | Qt=0.2176t1/2 | 0.2176 | 0.9861 | |
90 | Qt=0.2436t1/2 | 0.2436 | 0.9957 | |
120 | Qt=0.2693t1/2 | 0.2693 | 0.9983 | |
PAA-g-PTFE | 30 | Qt=0.1767t1/2 | 0.1767 | 0.9943 |
60 | Qt=0.2008t1/2 | 0.2008 | 0.9952 | |
90 | Qt=0.2287t1/2 | 0.2287 | 0.9991 | |
120 | Qt=0.2466t1/2 | 0.2466 | 0.9995 |
Complex | Q/(mmol·g-1) | Specific surface area/(m2·g-1) | Water contact angle/(°) |
---|---|---|---|
Fe-ALG | 2.32 | 0.248 | 82.1 |
Fe-PAA-g-PP | 2.37 | 0.263 | 100.3 |
Fe-PAA-g-PTFE | 2.29 | 0.151 | 104.6 |
Table 7 Q values and surface properties of three carboxylic fiber-Fe(Ⅲ) complexes
Complex | Q/(mmol·g-1) | Specific surface area/(m2·g-1) | Water contact angle/(°) |
---|---|---|---|
Fe-ALG | 2.32 | 0.248 | 82.1 |
Fe-PAA-g-PP | 2.37 | 0.263 | 100.3 |
Fe-PAA-g-PTFE | 2.29 | 0.151 | 104.6 |
Fig.7 Decoloration rate and mineralization of RR 195 in the presence of different complexes (A) D90 values under different irradiation; (B—D) UV-Vis spectra and TOCR(%) of dye degradation with Fe-ALG(B), Fe-PAA-g-PP(C) and Fe-PAA-g-PTFE(D), respectively. (B—D) t/min: a. 0; b. 10; c. 25; d. 40; e. 55; f. 70.
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