Preparation and Superstrong Adsorption of a Novel La(Ⅲ)-Crosslinked Alginate/Modified Diatomite Macroparticle Composite for Anionic Dyes Removal from Aqueous Solutions
Abstract
:1. Introduction
2. Results and Discussion
2.1. Selection of Preparation Conditions of the Gel Composite
2.2. Characterization of Materials
2.3. Adsorption Research
2.3.1. Research on Important Adsorption Conditions
2.3.2. Study on Adsorption Kinetics
2.3.3. Study on Adsorption Isotherms and Adsorption Thermodynamics
2.3.4. Comparison of Adsorption Properties of Various Materials
2.3.5. Regeneration Study
2.3.6. Discussion on the Adsorption Mechanism
3. Conclusions
4. Materials and Methods
4.1. Materials and Reagents
4.2. Preparation of CPAM-Dia/SA-La Gel Composite
4.3. Adsorption Experiments
4.4. Characterization of Materials
4.5. Regeneration Experiment
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Dyes | T/K | qe,exp (mg/g) | Pseudo-First-Order | |||
---|---|---|---|---|---|---|
k1 (min) | qe,c (mg/g) | R2 | RMSE × 10−2 | |||
AB 113 | 298 | 2692 | 0.0215 | 473 | 0.375 | 2.9 |
313 | 2589 | 0.0350 | 835 | 0.931 | 0.3 | |
328 | 2447 | 0.0157 | 100 | 0.386 | 1.5 | |
CR | 298 | 1520 | 0.0372 | 610 | 0.914 | 0.5 |
313 | 1468 | 0.0269 | 148 | 0.494 | 2.8 | |
328 | 1424 | 0.0236 | 64 | 0.777 | 0.6 | |
Dyes | T/K | qe,exp(mg/g) | Pseudo-Second-Order | |||
k2[g/(mg·min)] | qe,c(mg/g) | R2 | RMSE× 10−6 | |||
AB 113 | 298 | 2692 | 6.20 × 10−5 | 2768 | 0.997 | 1.4 |
313 | 2589 | 9.60 × 10−5 | 2648 | 0.999 | 0.5 | |
328 | 2447 | 5.01 × 10−4 | 2447 | 1.000 | 0.1 | |
CR | 298 | 1520 | 1.06 × 10−4 | 1579 | 0.997 | 4.1 |
313 | 1468 | 1.91 × 10−4 | 1501 | 0.999 | 2.3 | |
328 | 1424 | 9.54 × 10−4 | 1429 | 1.000 | 0.9 |
Dyes | T/K | Langmuir | |||
---|---|---|---|---|---|
qm (mg/g) | KL (L/mg) | R2 | RMSE × 10−5 | ||
AB 113 | 298 | 2762 | 0.076 | 1.000 | 0.9 |
313 | 2585 | 0.085 | 0.999 | 0.6 | |
328 | 2570 | 0.033 | 0.999 | 0.5 | |
CR | 298 | 1863 | 0.039 | 0.999 | 3.9 |
313 | 1863 | 0.026 | 0.998 | 5.5 | |
328 | 1779 | 0.020 | 0.998 | 5.6 | |
Dyes | T/K | Freundlich | |||
1/n | KF | R2 | RMSE× 10−4 | ||
AB 113 | 298 | 0.0859 | 1.61 × 103 | 0.945 | 4.0 |
313 | 0.0818 | 1.53 × 103 | 0.887 | 7.5 | |
328 | 0.1063 | 1.27 × 103 | 0.878 | 6.3 | |
CR | 298 | 0.1082 | 8.93 × 102 | 0.999 | 0.3 |
313 | 0.1302 | 7.58 × 102 | 0.999 | 0.2 | |
328 | 0.1372 | 6.73 × 102 | 0.999 | 0.3 | |
Dyes | T/K | Thermodynamic parameters | |||
ΔG(kJ/mol) | ΔH(kJ/mol) | ΔS[kJ/(mol·K)] | |||
AB 113 | 298 | −26.3 | −15.9 | 0.035 | |
313 | −26.9 | ||||
328 | −27.4 | ||||
CR | 298 | −31.6 | −19.1 | 0.042 | |
313 | −32.2 | ||||
328 | −32.9 |
Dyes | Adsorbents | qe(max) (mg/g) | Ref. |
---|---|---|---|
AB 113 | IRA 402(Cl−) | 130 | [40] |
AC−ZnO | 333.33 | [41] | |
Overripe Cucumis sativus peel | 59.81 | [42] | |
HAP | 153.85 | [43] | |
MC | 295 | [44] | |
C−Fe2O3 | 128 | [45] | |
ACF/Fe3O4 | 121.4 | [46] | |
CPAM-Dia/SA-La | 2907 | This study | |
CR | Rod-like γ-alumina/volcanic rock porous material | 243 | [47] |
PSI−PA | 522.2 | [48] | |
DOX KCF−100 | 240 | [49] | |
CR KCF−100 | 547 | ||
MgO/CA | 344.8 | [50] | |
MgO/GO | 684.85 | [51] | |
ZIF−8 | 1339.8 | [52] | |
BNNS@Fe3O4 | 499 | [53] | |
CMC−MMT | 74.13 | [54] | |
Al2O3−ZrO2 | 57.50 | [55] | |
Fe3O4@SiO2@ZnTDPAT | 12.68 | [56] | |
MgFe2O4−NH2NPs | 71.4 | [57] | |
pTSA doped PANI@graphene oxide | 66.66 | [58] | |
PANI/ZTO | 54.51 | [59] | |
PANI@ZnO | 69.82 | [60] | |
CPAM-Dia/SA-La | 1578 | This study |
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Zhao, Y.; Li, B. Preparation and Superstrong Adsorption of a Novel La(Ⅲ)-Crosslinked Alginate/Modified Diatomite Macroparticle Composite for Anionic Dyes Removal from Aqueous Solutions. Gels 2022, 8, 810. https://doi.org/10.3390/gels8120810
Zhao Y, Li B. Preparation and Superstrong Adsorption of a Novel La(Ⅲ)-Crosslinked Alginate/Modified Diatomite Macroparticle Composite for Anionic Dyes Removal from Aqueous Solutions. Gels. 2022; 8(12):810. https://doi.org/10.3390/gels8120810
Chicago/Turabian StyleZhao, Yuting, and Beigang Li. 2022. "Preparation and Superstrong Adsorption of a Novel La(Ⅲ)-Crosslinked Alginate/Modified Diatomite Macroparticle Composite for Anionic Dyes Removal from Aqueous Solutions" Gels 8, no. 12: 810. https://doi.org/10.3390/gels8120810