Oil pollution in marine environment caused by oil spillage has been a main threat to the ecosystem including the ocean life and to the human being. In this research, three indigenous purple photosynthetic strains Rhodopseudomonas sp. DD4, DQ41, and FO2 were isolated from oil-contaminated coastal zones in Vietnam. The cells of these strains were immobilized on different carriers including cinder beads (CB), coconut fiber (CF), and polyurethane foam (PUF) for diesel oil removal from artificial seawater. The mixed biofilm formed by using CB, CF, and PUF as immobilization supports degraded 90, 91, and 95% of diesel oil (DO) with the initial concentration of 17.2 g/L, respectively, after 14 days of incubation. The adsorption of DO on different systems was accountable for the removal of 12-16% hydrocarbons for different carriers. To the best of our knowledge, this is the first report on diesel oil degradation by purple photosynthetic bacterial biofilms on different carriers. Moreover, using carriers attaching purple photosynthetic bacteria to remove diesel oil in large scale is considered as an essential method for the improvement of a cost-effective and efficient bioremediation manner. This study can be a promising approach to eliminate DO from oil-contaminated seawater.

中文翻译：

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通过使用来自越南的受石油污染的沿海地区的紫色紫色光合细菌在不同载体上形成的生物膜增强柴油的降解。

溢油造成的海洋环境油污染已成为包括海洋生物和人类在内的生态系统的主要威胁。在这项研究中，三个本地紫色光合菌株Rhodopseudomonas sp。DD4，DQ41和FO2是从越南受石油污染的沿海地区中分离出来的。这些菌株的细胞固定在不同的载体上，包括煤渣珠（CB），椰子纤维（CF）和聚氨酯泡沫（PUF），用于从人造海水中去除柴油。孵育14天后，使用CB，CF和PUF固定化形成的混合生物膜支持分别降解90％，91％和95％的初始浓度分别为17.2 g / L的柴油（DO）。DO在不同系统上的吸附是除去不同载体的12-16％碳氢化合物的原因。据我们所知，这是关于不同载体上紫色光合细菌生物膜降解柴油的第一份报告。此外，使用附着有紫色光合细菌的载体大规模去除柴油被认为是改进成本有效和有效的生物修复方式的必要方法。这项研究可能是一种从含油海水中消除溶解氧的有前途的方法。