| Autor: |
Huang, Guoxia, Li, Junsheng, Yan, Liujuan, Ma, Ji |
| Předmět: |
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| Zdroj: |
Water, Air & Soil Pollution; Jan2022, Vol. 233 Issue 1, p1-14, 14p |
| Abstrakt: |
Polycyclic aromatic hydrocarbons (PAHs) are harmful to the health of people and other organisms due to their high toxicity, difficult degradation, and wide distribution. At present, the removal of PAHs from the environment is still an urgent challenge. In this study, silica-coated magnetic nanoparticles were conjugated with DNA and then used to remove 1, 2-benzoanthracene (BaA) from aqueous solution due to the intercalation between BaA and DNA. The effects of contact time, temperature, and pH on the BaA removal efficiency were evaluated; the maximum removal efficiency was obtained when BaA was incubated with DNA-conjugated magnetic nanoparticles for 40 min at 25℃ and pH 7.0. The initial volume of BaA solution and the amount of magnetic nanoparticles were also evaluated. The adsorption process accorded with Langmuir model and pseudo-2nd-order kinetic model. The BaA removal efficiency was not significantly affected by co-existing ions and substances in natural water. For natural lake samples containing BaA, the removal efficiency was above 98.9% when the BaA initial concentration was in the range of 0.10–0.35 mg/L. With the advantages of excellent adsorption performance, simple operation, and high selectivity, the DNA-conjugated magnetic nanoparticles have great potential application value in water purification. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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