Magnetic Multiwall Carbon Nanotube Decorated with Novel Functionalities: Synthesis and Application as Adsorbents for Lead Removal from Aqueous Medium
Abstract
:1. Introduction
2. Materials and Methods
2.1. Instrument and Characterization
2.2. Magnetization of Modified Multiwall Carbon Nanotube
2.3. Adsorption Study
2.3.1. Adsorption Isotherms Models
2.3.2. Adsorption Kinetics
2.3.3. Adsorption Thermodynamics
2.3.4. Regeneration of Adsorbents
2.4. Real Water Sample
3. Results and Discussion
3.1. Adsorbents Analysis
3.2. Lead Ion Adsorption
3.2.1. Effect of Contact Time
3.2.2. Effect of pH
3.2.3. Effect of Temperature on Lead Adsorption
3.2.4. Effect of Lead Initial Concentration
3.3. Equilibrium Isotherm Models for Lead Adsorption
3.4. Adsorption Kinetic Model
3.5. Adsorption Thermodynamic
3.6. Adsorbent Regeneration
3.7. Real Water Samples
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Abbreviations
CNTs | Carbon nanotube |
MWCNT | Multiwall carbon nanotube |
MWCNT-COOH | Oxidized Multiwall carbon nanotube |
m-MWCNT-HA | Magnetized Multiwall carbon nanotube functionalized by hydroxyl amine |
m-MWCNT-CYS | Magnetized Multiwall carbon nanotube functionalized by cysteine |
m-MWCNT-HYD | Magnetized Multiwall carbon nanotube functionalized by hydrazine |
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Adsorbents | Maximum Adsorption Capacity (qm) or % Removal | Conditions | Surface Area (m²/g) | References |
---|---|---|---|---|
MWCNTs | 1 | pH: 5, CNTs dosage: 0.05 g, Temp:280–321 K | 134 | [40] |
MWCNTs | 4 | pH: 5, Temp:298–323 K, CNTs dosage:1 g, Contact time: 20–120 min | 162.16 | [41] |
AC | 18 | 1124.8 | ||
Oxidized CNTs | 104.0 | pH: 7, Temp: 298 K, C0: 100–1200 | 66 | [42] |
CNTs | 62.5% | pH: 5, CNTs dosage: 0.05 g, Temp: 298 K, C0: 5–60 | 98.6 | [43] |
Oxidized MWCNTs | 97.08% | pH: 6–11, CNTs dosage: 0.05–0.3 g | 75.4 | [44] |
m-MWCNT-HA | 99.8% | pH: 8, Temp: 298 K, C0: 10 ppm | 151 | Our research |
m-MWCNT-CYS | 97.4% | 154.5 | ||
m-MWCNT-HYD | 97.5% | 187 |
Langmuir Isotherm | Freundlich Isotherm | ||||||
---|---|---|---|---|---|---|---|
qm (mg·g−1) | KL (g·L−1) | RL | R2 | KF (mg·g−1) | n (L·mg −1) | R2 | |
m-MWCNT-HA | 1.15 | 39.13 | 0.002 | 0.99 | 4.22 | −12.80 | 0.15 |
m-MWCNT-CYS | 3.31 | 0.76 | 0.012 | 0.98 | 5.31 | −41.60 | 0.02 |
m-MWCNT-HYD | 9.09 | 0.20 | 0.007 | 0.72 | 4.30 | 28.50 | 0.26 |
Pseudo First-Order Kinetics | Pseudo Second-Order | |||||||
---|---|---|---|---|---|---|---|---|
qe | qe | K1 | R2 | qe | K2 | Ea | R2 | |
exp | (mg g−1) Calc | (mg g−1 min-1) | (mg g−1 min−1) | (mg g−1 min−1) | (kj) | |||
m-MWCNT -HA | 4.96 | 4.03 | –0.0023 | 0.33 | 4.99 | 0.32 | 10.50 | 0.99 |
m-MWCNT-CYS | 4.93 | 3.35 | –0.0034 | 0.51 | 5.15 | 0.03 | 5.65 | 0.99 |
m-MWCNT-HYD | 4.85 | 4.16 | –0.0013 | 0.32 | 5.39 | 0.04 | 2.50 | 0.91 |
Intra-Particle Diffusion | ||||||||
C (mg g−1) | Kid (mg g−1min−0.5) | R2 | ||||||
4.29 | 0.07 | 0.51 | ||||||
1.172 | 0.41 | 0.60 | ||||||
1.90 | 0.34 | 0.40 |
(kj) | (J K−1) | (25 °C) | |
---|---|---|---|
m-MWCNT-HA | 205.60 | 0.72 | −10.15 |
m-MWCNT-CYS | 17.26 | 0.06 | −2.11 |
m-MWCNT-HYD | 50.60 | 0.19 | −6.90 |
Analyte | ppb Real Water | ppb After Treatment with m-MWCNT-HA | % Removal after Treatment with m-MWCNT-HA | ppb After Treatment with m-MWCNT-CYS | % Removal after Treatment with m-MWCNT-CYS | ppb after Treatment with m-MWCNT-HYD | % Removal after Treatment with m-MWCNT-HYD |
---|---|---|---|---|---|---|---|
Al | 9.2 | 1.7 | 81.5 | 2.9 | 68.4 | 0.9 | 90.2 |
As | 1.7 | 0.7 | 58.8 | 0.66 | 61.1 | 0.23 | 86.4 |
Ba | 29.6 | 0.1 | 99.6 | 0.5 | 98.3 | 11.3 | 61.8 |
Be | 0.1 | 0.1 | 0 | 0.05 | 50 | 0.1 | 0 |
B | 120.8 | 88 | 27.1 | 89.8 | 25.6 | 77.6 | 35.7 |
Cd | 19 | 13.5 | 28.9 | 1.7 | 91 | 1.7 | 91 |
Cr | 22 | 0.5 | 97.2 | 13.7 | 37.7 | 11 | 50 |
Co | 15 | 5.1 | 66 | 3.1 | 79.3 | 2.2 | 85.3 |
Cu | 2.1 | 0.99 | 52.8 | 0.8 | 61.9 | 0.11 | 94.7 |
Fe | 520.5 | 170 | 67.5 | 77 | 85.2 | 140.5 | 73 |
Pb | 169 | 60.7 | 64 | 45.3 | 73.1 | 55.6 | 67.1 |
Mn | 290 | 160 | 44.8 | 35.6 | 87.7 | 40.6 | 86 |
Ni | 40.8 | 31.9 | 21.8 | 20.1 | 50.7 | 24.5 | 39.9 |
Se | 80.7 | 76.2 | 5.6 | 80.7 | 0 | 70.2 | 13 |
Tl | 0.7 | 0.4 | 42.8 | 0.4 | 42.8 | 0.2 | 71.4 |
V | 13.7 | 6.2 | 54.7 | 13.4 | 2.1 | 2.3 | 83.2 |
Zn | 90 | 40 | 55.5 | 55.1 | 38.7 | 36 | 60 |
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Hanbali, G.; Jodeh, S.; Hamed, O.; Bol, R.; Khalaf, B.; Qdemat, A.; Samhan, S.; Dagdag, O. Magnetic Multiwall Carbon Nanotube Decorated with Novel Functionalities: Synthesis and Application as Adsorbents for Lead Removal from Aqueous Medium. Processes 2020, 8, 986. https://0-doi-org.brum.beds.ac.uk/10.3390/pr8080986
Hanbali G, Jodeh S, Hamed O, Bol R, Khalaf B, Qdemat A, Samhan S, Dagdag O. Magnetic Multiwall Carbon Nanotube Decorated with Novel Functionalities: Synthesis and Application as Adsorbents for Lead Removal from Aqueous Medium. Processes. 2020; 8(8):986. https://0-doi-org.brum.beds.ac.uk/10.3390/pr8080986
Chicago/Turabian StyleHanbali, Ghadir, Shehdeh Jodeh, Othman Hamed, Roland Bol, Bayan Khalaf, Asma Qdemat, Subhi Samhan, and Omar Dagdag. 2020. "Magnetic Multiwall Carbon Nanotube Decorated with Novel Functionalities: Synthesis and Application as Adsorbents for Lead Removal from Aqueous Medium" Processes 8, no. 8: 986. https://0-doi-org.brum.beds.ac.uk/10.3390/pr8080986