Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Characteristics of Resin
2.3. Characteristics of Extractant
2.4. Methods and Analysis
2.4.1. Preparation of Pure Resin
2.4.2. Preparation of the Impregnated Resin
Determination of Cyanex 272 Concentration in Purolite MN 202
FTIR Studies
Surface Area
2.4.3. Preparation of Metal Solutions
2.4.4. Adsorption Studies
Desorption Studies
2.4.5. SEM
3. Results and Discussion
3.1. Sorption Studies of Au(III) on Purolite MN 202
3.2. Extraction Studies of Au(III) Using Cyanex 272 in Toluene
3.3. Sorption Studies of Au(III) on Purolite MN 202 Impregnated with Cyanex 272
3.3.1. Determination of Cyanex 272 Concentration in Purolite MN 202
3.3.2. FTIR
3.3.3. Surface Area
3.3.4. Adsorption Investigations
3.4. Kinetic Parameters
3.5. Adsorption Isotherms Models
3.6. SEM Studies
3.7. Recovery of Gold from the Modular Connector RJ 45 (8P8C)
3.8. Limitation of Purolite MM 202 Impregnated with Cyanex 272
4. Desorption Studies
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Pseudo Second Order | Ion | HCl Concentration [M] | Kinetic Parameters | ||||
---|---|---|---|---|---|---|---|
R2 | q2 (mg·g−1) | k2 (g·(mg·min)−1) | h (mg·(g·min)−1) | SD (Standard Deviation) | |||
Before impregnation | |||||||
Type 1 | Au(III) | 0.001 | 0.99980 | 9.96 | 0.0512 | 5.08 | 0.18 |
0.1 | 0.99986 | 9.18 | 0.3072 | 25.88 | 0.16 | ||
1 | 0.99995 | 9.28 | 0.3569 | 30.71 | 0.09 | ||
3 | 0.99998 | 9.46 | 0.2378 | 21.29 | 0.06 | ||
6 | 0.99997 | 9.32 | 0.1457 | 12.65 | 0.08 | ||
After impregnation | |||||||
Type 1 | Au(III) | 0.001 | 0.99974 | 9.96 | 0.0088 | 0.88 | 0.77 |
0.1 | 0.99970 | 8.59 | 0.0271 | 2.00 | 0.25 | ||
1 | 0.99970 | 9.12 | 0.0766 | 6.36 | 0.18 | ||
3 | 0.99989 | 9.47 | 0.0488 | 4.37 | 0.14 | ||
6 | 0.99980 | 9.49 | 0.0324 | 2.92 | 0.18 |
Sorbent | HCl Concentration [M] | Langmuir Isotherm Parameters | Freundlich Isotherm Parameters | ||||
---|---|---|---|---|---|---|---|
q0, mg·g−1 | b, dm3·mg−1 | R2 | n | KF, dm3·g−1 | R2 | ||
Purolite MN 202 before impregnation | 0.001 | 162.97 | 0.0588 | 0.922 | 1.338 | 9.997 | 0.935 |
0.1 | 140.25 | 0.0429 | 0.992 | 1.451 | 7.437 | 0.961 | |
1 | 53.41 | 0.0152 | 0.996 | 2.355 | 3.725 | 0.978 | |
3 | 56.38 | 0.0228 | 0.997 | 2.528 | 5.116 | 0.970 | |
6 | 58.30 | 0.0145 | 0.997 | 2.214 | 3.524 | 0.975 | |
Purolite MN 202 after impregnation | 0.001 | 259.45 | 0.0292 | 0.983 | 1.177 | 7.937 | 0.992 |
0.1 | 187.03 | 0.0296 | 0.999 | 1.290 | 6.501 | 0.990 | |
1 | 156.32 | 0.0051 | 0.995 | 1.304 | 1.444 | 0.995 | |
3 | 167.55 | 0.0057 | 0.997 | 1.284 | 1.609 | 0.994 | |
6 | 172.33 | 0.0059 | 0.996 | 1.281 | 1.702 | 0.995 |
Metal Ions/Concentration, mg·dm−3 | |||||
---|---|---|---|---|---|
Au3+ | Ni2+ | Co2+ | Fe3+ | Cu2+ | Zn2+ |
16.53 | 349.6 | 0.45 | 7.4 | 57,400 | 42.8 |
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Wójcik, G.; Górska-Parat, M.; Hubicki, Z.; Zinkowska, K. Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent. Materials 2023, 16, 924. https://doi.org/10.3390/ma16030924
Wójcik G, Górska-Parat M, Hubicki Z, Zinkowska K. Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent. Materials. 2023; 16(3):924. https://doi.org/10.3390/ma16030924
Chicago/Turabian StyleWójcik, Grzegorz, Magdalena Górska-Parat, Zbigniew Hubicki, and Karolina Zinkowska. 2023. "Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent" Materials 16, no. 3: 924. https://doi.org/10.3390/ma16030924