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首页> 外文期刊>RSC Advances >Synergistic and simultaneous biosorption of phenanthrene and iodine from aqueous solutions by soil indigenous bacterial biomass as a low-cost biosorbent
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Synergistic and simultaneous biosorption of phenanthrene and iodine from aqueous solutions by soil indigenous bacterial biomass as a low-cost biosorbent

机译：土生细菌生物质作为低成本生物吸附剂从水溶液中协同和同时吸附菲和碘

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The removal of phenanthrene and iodine from aqueous solutions in single and binary systems by inactivated soil indigenous bacterial biomass (SIBB), as well as affecting factors, were evaluated. Sorption kinetic and isotherm studies were carried out to investigate the synergistic effects of phenanthrene and iodine. Optimal parameters for the biosorption process included a solution pH of 6.0 and biosorbent dosage of 0.75 g L ~(?1) . The ionic strength significantly decreased the biosorption of both phenanthrene and iodine in single conditions, while no obvious influences were found in the binary conditions. A pseudo-second-order model was well fitted to the kinetic biosorption data for both phenanthrene and iodine. The results showed that the presence of co-solute accelerated the biosorption processes and the pseudo-second-order biosorption rates ( k _(2) ) for phenanthrene and iodine increased from 0.005441 to 0.009825 g mg ~(?1) min ~(?1) and from 0.000114 to 0.000223 g mg ~(?1) min ~(?1) , respectively. The SIBB showed strong affinity with both phenanthrene and iodine, with a partition coefficient K _(d) (Linear model) of 6892.4 L kg ~(?1) for phenanthrene and affinity parameter K _(L) (Langmuir model) of 232?500 L kg ~(?1) for iodine. The presence of co-solute illustrated a synergistic effect on the biosorption of phenanthrene and iodine due to intermolecular forces between phenanthrene and iodine, enhancing the K _(d) of 34.7% for phenanthrene and K _(L) of 107.0% for iodine, respectively. The results suggested that SIBB was an effective material for the simultaneous biosorption of phenanthrene and iodine from aqueous solutions.
机译：评价了灭活的土壤原生细菌生物量（SIBB）从单一和二元系统中的水溶液中去除菲和碘的影响因素。进行了吸附动力学和等温线研究，以研究菲和碘的协同作用。生物吸附过程的最佳参数包括溶液的pH值为6.0，生物吸附剂量为0.75 g L〜（？1）。在单一条件下，离子强度显着降低了菲和碘的生物吸附，而在二元条件下未发现明显的影响。拟二级模型很好地拟合了菲和碘的动力学生物吸附数据。结果表明，共溶质的存在促进了生物吸附过程，并且菲和碘的假二级生物吸附速率（k _（2））从0.005441增加到0.009825 g mg〜（？1）min〜（？ 1）和0.000114至0.000223 g mg〜（？1）min〜（？1）。 SIBB对菲和碘都具有很强的亲和力，对菲的分配系数K _（d）（线性模型）为6892.4 L kg〜（？1），亲和力参数K _（L）（Langmuir模型）为232。碘500 L kg〜（？1）。共溶物的存在说明了由于菲和碘之间的分子间作用力，对菲和碘的生物吸附具有协同作用，从而使菲的K _（d）提高了34.7％，碘的K _（L）提高了107.0％，分别。结果表明，SIBB是同时从水溶液中生物吸附菲和碘的有效材料。

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