Department of Chemistry, Amar Singh College, Gogji Bagh, Srinagar, 190008, JK, India.
Physical Chemistry Division, Department of Chemistry, University of Kashmir, Srinagar, 190006, JK, India.
Chemosphere. 2020 Mar;242:125160. doi: 10.1016/j.chemosphere.2019.125160. Epub 2019 Oct 21.
Surfactant enhanced remediation (SER) is an effective approach for decontaminating the PAH polluted soils. Solubilization and Cosolubilization of Phenanthrene (Ph), Pyrene (Py) and Perylene (Pe) as single, binary and ternary mixtures have been studied employing cationic (CTAB), anionic (SDS), non-ionic surfactant (Brij 30) and block copolymer (P123) micelles. In the single solute solubilization studies, solubility of Pe follows the order Brij 30 > CTAB > SDS whereas Ph or Py followed the order of CTAB > Brij 30 > SDS. In the cosolubilization studies, an increase, decrease or no change in the mutual solubility of PAHs was observed. Synergism in solubilization was observed most in P123 in both binary and ternary PAH mixture where more PAHs could get solubilized in the dense micellar shell region, thereby enhancing the micellar core volume leading to enhanced solubilization of PAHs. The solubilizates as pairs (Ph-Pe and Py-Pe) were further tested for any possible energy transfer in presence of surfactant based restricted host environments using spectrofluorometry and spectrophotometry. Based on the solubilization and cosolubilization an efficient non-radiative energy transfer (FRET) was observed between Ph/Py (donor) and Pe (acceptor) in the non-ionic surfactant system as well as in CTAB-Brij 58 mixed system. The results of this work may improve the effective utilization of surfactants in their correct evaluation for the removal of PAHs from contaminated soils or aquifers treated with SER technology.
表面活性剂强化修复（SER）是一种有效去除多环芳烃污染土壤的方法。本文采用阳离子（CTAB）、阴离子（SDS）、非离子表面活性剂（Brij 30）和嵌段共聚物（P123）胶束，研究了菲（Ph）、芘（Py）和苝（Pe）单一、二元和三元混合物的增溶和共增溶作用。在单一溶质增溶研究中，Pe 的溶解度顺序为 Brij 30>CTAB>SDS，而 Ph 或 Py 的溶解度顺序为 CTAB>Brij 30>SDS。在共增溶研究中，观察到 PAHs 的相互溶解度增加、减少或没有变化。在二元和三元 PAH 混合物中，P123 中观察到最明显的增溶协同作用，更多的 PAHs 可以溶解在致密胶束壳层区域，从而增加胶束核体积，从而增强 PAHs 的增溶作用。在存在基于表面活性剂的受限主体环境的情况下，使用荧光光谱法和分光光度法进一步测试了作为对（Ph-Pe 和 Py-Pe）的增溶产物是否存在任何可能的能量转移。基于增溶和共增溶作用，在非离子表面活性剂体系以及 CTAB-Brij 58 混合体系中观察到 Ph/Py（供体）和 Pe（受体）之间有效的非辐射能量转移（FRET）。这项工作的结果可以提高表面活性剂在其正确评价中的有效利用，以去除受 SER 技术处理的污染土壤或含水层中的 PAHs。
