Yue Rengyu, An Chunjiang, Ye Zhibin, Li Xixi, Li Qing, Zhang Peng, Qu Zhaonian, Wan Shuyan
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada.
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada.
Chemosphere. 2023 Feb;313:137389. doi: 10.1016/j.chemosphere.2022.137389. Epub 2022 Nov 28.
Oil pollution is one of the major environmental concerns in the petroleum industry. In this study, a cheap food-grade sodium caseinate (NaCas) was used as a pH-responsive washing fluid in the remediation of phenanthrene (PHE) affected peat moss. The effects of environmental factors on the removal of PHE were systematically investigated. The results showed that increasing NaCas concentration and washing temperature improved the PHE mobilization, while high salinity and humic acid dosage displayed a negative effect. The factorial analysis revealed that three individual factors and two interactions exhibited significant effects on the washing performance. Due to the pH-responsive property of NaCas, the turbidity, total organic carbon (TOC), and chemical oxygen demand (COD) of the washing effluent were remarkably reduced by simply adjusting the solution acidity, improving the practical application of such a washing method. Significantly, the toxicity modeling proved that NaCas can reduce the binding energy between PHE and superoxide dismutase (SOD) of the selected marine organism, and thus relieve the toxicity of PHE to the organisms. Given these advantages, NaCas-assisted washing can be a viable option for the remediation of contaminated peat moss.
石油污染是石油工业中主要的环境问题之一。在本研究中，一种廉价的食品级酪蛋白酸钠（NaCas）被用作pH响应型洗涤液，用于修复受菲（PHE）污染的泥炭藓。系统研究了环境因素对菲去除效果的影响。结果表明，增加NaCas浓度和洗涤温度可提高菲的迁移率，而高盐度和腐殖酸用量则显示出负面影响。因子分析表明，三个单独因素和两个相互作用对洗涤性能有显著影响。由于NaCas的pH响应特性，通过简单调节溶液酸度，洗涤废水的浊度、总有机碳（TOC）和化学需氧量（COD）显著降低，提高了这种洗涤方法的实际应用价值。值得注意的是，毒性建模证明，NaCas可以降低菲与所选海洋生物超氧化物歧化酶（SOD）之间的结合能，从而减轻菲对生物的毒性。鉴于这些优点，NaCas辅助洗涤可能是修复受污染泥炭藓的可行选择。
