ABSTRACT

Polycyclic aromatic hydrocarbons have adverse effects on the organisms, plants, and soil structure. Therefore, they should be removed by an appropriate and effective method. In this study, simultaneous removal of 500 mg/kg_soil of phenanthrene and pyrene was investigated for the individual and combined application of Tween 80, Triton X-100, and sodium persulfate from the alluvial soil. The results revealed that the maximum removal efficiencies of phenanthrene (94.06 ± 0.30%) and pyrene (90.07 ± 0.19%) were observed in the presence of Triton X-100 + sodium persulfate (0.5 M) within 1 hour, respectively. Also, individual application of surfactants and sodium persulfate had efficiencies of less than 80%. It should be noted that the removal of phenanthrene and pyrene followed the first-order kinetic model. Economic evaluations of combined treatment demonstrated that the application of more proportion of Triton X-100 (10000 mg/L) + less proportion of sodium persulfate (0.3 M) is more cost-effective for the remediation of soil in the field study. Based on the results, the combined application of the washing process by Triton X-100 and persulfate oxidant can significantly improve the removal efficiencies and is a promising technique in the remediation of polycyclic aromatic hydrocarbons contaminated soil.

摘要

多环芳烃对生物、植物和土壤结构有不利影响。因此，应通过适当有效的方法去除它们。在本研究中，同时去除 500 mg/kg_土壤对冲积土中 Tween 80、Triton X-100 和过硫酸钠的单独和联合应用进行了菲和芘的研究。结果表明，在存在 Triton X-100 + 过硫酸钠 (0.5 M) 的情况下，在 1 小时内分别观察到菲 (94.06 ± 0.30%) 和芘 (90.07 ± 0.19%) 的最大去除效率。此外，单独使用表面活性剂和过硫酸钠的效率低于 80%。应该注意的是，菲和芘的去除遵循一级动力学模型。联合处理的经济评价表明，在田间研究中，使用更多比例的 Triton X-100 (10000 mg/L) + 更少比例的过硫酸钠 (0.3 M) 对土壤修复更具成本效益。根据结果​​，