TY - JOUR
AU1 - Kozina, N. D.
AU2 - Golovina, M. A.
AU3 - Kirila, T. Y.
AU4 - Blokhin, A. N.
AU5 - Tenkovtsev, A. V.
AU6 - Filippov, A. P.
AB - A number of thermosensitive poly(2-alkyl-2-oxazoline)s, differing in macromolecule architecture and hydrophilic-hydrophobic balance, were synthesized and studied in order to determine the influence of their structure on the ability to extract oil from oil-contaminated sands. Aqueous 0.5% (wt.) solutions of the polymers was studied by the turbidimetry. Cloud points were found in the range of 36–66 °C. Dynamic light scattering data showed that the polymers form stable micelles with an unimodal distribution of hydrodynamic diameters. Extraction of an oil from contaminated sand with 3.1% oil content was carried out using aqueous 0.5% solutions of the polymers at room temperature and vigorous stirring for 2 h, followed by heating of the mixture above the phase transition temperature and further separation of the solid phase. When the solid phase was cooled, the release of free oil was observed. The polymers studied were shown to extract 63.9–93.7 wt% of oil from contaminated sand samples, depending on the polymer structure. The lowest residual carbon content (0.195 wt%) in the sand sample after extraction process was obtained using an eight-arm star-shaped polymer with hydrophobic poly(2-isopropyl-2-oxazoline) arms. Starting with a polymer concentration of 1 mg/mL, aqueous solutions of studied polyoxazolines can be reused up to five successive extractions while maintaining a satisfactory degree of purification of contaminated sand. The results demonstrate that thermosensitive polyoxazolines can be an effective means for cleaning up coastal sands from oil spills.
TI - Thermosensitive poly(2-alkyl-2-oxazoline)s as effective flocculants for oil extraction from contaminated coastal sand
JF - International Journal of Environmental Science and Technology
DO - 10.1007/s13762-024-06279-z
DA - 2024-12-18
UR - https://www.deepdyve.com/lp/springer-journals/thermosensitive-poly-2-alkyl-2-oxazoline-s-as-effective-flocculants-UbvRuemLwR
SP - 1
EP - 12
VL - OnlineFirst
IS - 
DP - DeepDyve
ER -