A Novel Magnetic Graphene Oxide Composite Absorbent for Removing Trace Residues of Polybrominated Diphenyl Ethers in Water
Abstract
:1. Introduction
2. Materials and Methods
2.1. Chemicals
2.2. Preparation of Fe3O4@PDDA/GOx@DNA Nanoparticles
2.2.1. Synthesis of Fe3O4 Nanospheres
2.2.2. Synthesis of Fe3O4@PDDA Nanospheres
2.2.3. Synthesis of Fe3O4@PDDA/GOx@DNA Nanoparticles
2.3. The Removal Experiment for BDEs in Waters
2.4. Real Sample Preparation
3. Results and Discussion
3.1. Characterization of Adsorbents
3.2. Kinetic Study
Sample | Qeq (mg g−1) | Lagergren First-Order Model | Pseud Second-Order Model | ||||
---|---|---|---|---|---|---|---|
Q1 (mg g−1) | K1 (min−1) | r2 | Q2 (mg g−1) | k2 (g mg−1 min−1) | r2 | ||
BDE28 | 49.1 | 49.0 | 0.387 | 0.998 | 49.1 | 0.023 | 0.984 |
Analytes | BDE17 | BDE28 | BDE71 | BDE47 | BDE66 | BDE100 | |
---|---|---|---|---|---|---|---|
Tap water | Found (ng/mL) | ND | ND | ND | ND | ND | ND |
Removal percentages (%) (Add 5 ng/mL) | 92.5 ± 2.3 | 94.1 ± 3.1 | 87.8 ± 2.9 | 93.2 ± 2.8 | 93.3 ± 3.9 | 90.2 ± 3.4 | |
Removal percentages (%) (Add 5 ng/mL) | 92.3 ± 1.8 | 97.1 ± 1.3 | 95.2 ± 3.2 | 95.3 ± 3.1 | 88.9 ± 4.2 | 89.7 ± 3.2 | |
Zhenhai River Water 1 | Found (ng/mL) | 1.62 | 1.53 | 1.42 | ND | ND | ND |
Removal percentages (%) (Add 5 ng/mL) | 90.2 ± 3.4 | 93.2 ± 4.8 | 92.1 ± 4.3 | 93.4 ± 3.2 | 89.5 ± 3.5 | 90.4 ± 3.3 | |
Removal percentages (%) (Add 5 ng/mL) | 89.6 ± 1.8 | 89.7 ± 3.4 | 90.6 ± 3.4 | 90.7 ± 2.1 | 98.8 ± 3.4 | 93.5 ± 3.2 | |
Yongjiang River water | Found (ng/mL) | 1.42 | 1.21 | ND | ND | ND | ND |
Removal percentages (%) (Add 5 ng/mL) | 92.8 ± 2.1 | 97.5 ± 1.2 | 93.3 ± 3.2 | 92.4 ± 4.3 | 94.1 ± 3.1 | 93.3 ± 1.7 | |
Removal percentages (%) (Add 5 ng/mL) | 92.3 ± 2.8 | 99.5 ± 2.9 | 94.1 ± 5.8 | 92.5 ± 4.7 | 92.3 ± 4.9 | 89.1 ± 2.8 |
3.3. Adsorption Isotherms
3.4. Effect of Adsorption Conditions
3.4.1. Adsorption Time
3.4.2. Amount of the Adsorbents
3.4.3. Effect of the Solution pH
3.5. The Reusability of the Absorbent
3.6. The Application of Adsorbent in Environmental Water Samples
Analytes in Zhenhai River 2 | BDE17 | BDE28 | BDE71 | BDE47 | BDE66 | BDE100 | |
---|---|---|---|---|---|---|---|
C18-SPE | Found (ng/mL) | 0.50 | 0.58 | 0.69 | ND | ND | ND |
This work adsorbent | Found (ng/mL) | 0.55 | 0.54 | 0.78 | ND | ND | ND |
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Gan, N.; Zhang, J.; Lin, S.; Long, N.; Li, T.; Cao, Y. A Novel Magnetic Graphene Oxide Composite Absorbent for Removing Trace Residues of Polybrominated Diphenyl Ethers in Water. Materials 2014, 7, 6028-6044. https://doi.org/10.3390/ma7086028
Gan N, Zhang J, Lin S, Long N, Li T, Cao Y. A Novel Magnetic Graphene Oxide Composite Absorbent for Removing Trace Residues of Polybrominated Diphenyl Ethers in Water. Materials. 2014; 7(8):6028-6044. https://doi.org/10.3390/ma7086028
Chicago/Turabian StyleGan, Ning, Jiabing Zhang, Shaichai Lin, Nengbing Long, Tianhua Li, and Yuting Cao. 2014. "A Novel Magnetic Graphene Oxide Composite Absorbent for Removing Trace Residues of Polybrominated Diphenyl Ethers in Water" Materials 7, no. 8: 6028-6044. https://doi.org/10.3390/ma7086028