Chemistry Department, Faculty of Science, Laboratory of Organic Chemistry, Bioorganic and Environment, University Chouaïb Doukkali, El Jadida, Morocco.
Environ Sci Pollut Res Int. 2020 Sep;27(27):33636-33648. doi: 10.1007/s11356-020-07846-w. Epub 2020 Feb 6.
In this study, we have investigated the removal efficiency of two organic pollutants: methylene blue (MB) and Reactive Blue 19 (RB19) dyes by using a brown marine alga abundantly available on the Moroccan coastlines called Bifurcaria bifurcata (Bif-Bcata). During the experiments that were conducted in batch mode, we have studied the effect of some parameters such as pH, Bif-Bcata mass, contact time, and initial dye concentration in order to optimize the most suitable biosorption conditions. The biosorption tests on Bif-Bcata showed that the equilibrium is reached after 15 min for both dyes MB and RB19. The optimal pH values are 5.6 and 1.0 for MB and RB19, respectively. Kinetic studies revealed that the biosorption of both dyes follows the pseudo-second-order model. The biosorption isotherms demonstrated that the Langmuir model is the most appropriate to describe the biosorption equilibrium for both dyes MB and RB19 with maximum biosorption capacities reaching 2744.5 mg/g for MB and 88.7 mg/g for RB19. According to these results, it is clear that Bif-Bcata can be considered a promising biomaterial to be used as an effective biosorbent for the elimination of cationic and anionic dyes from textile effluents.
在这项研究中，我们研究了两种有机污染物的去除效率：亚甲蓝（MB）和活性蓝 19（RB19）染料，使用的是一种在摩洛哥海岸大量存在的棕色海洋藻类，称为二叉藻（Bif-Bcata）。在分批模式下进行的实验中，我们研究了一些参数的影响，如 pH 值、Bif-Bcata 质量、接触时间和初始染料浓度，以优化最合适的生物吸附条件。Bif-Bcata 的生物吸附测试表明，两种染料 MB 和 RB19 的平衡在 15 分钟后达到。MB 和 RB19 的最佳 pH 值分别为 5.6 和 1.0。动力学研究表明，两种染料的吸附都遵循伪二级模型。吸附等温线表明，Langmuir 模型最适合描述两种染料 MB 和 RB19 的吸附平衡，MB 的最大吸附容量达到 2744.5mg/g，RB19 的吸附容量达到 88.7mg/g。根据这些结果，可以清楚地看出，二叉藻可以被认为是一种有前途的生物材料，可以用作从纺织废水中去除阳离子和阴离子染料的有效生物吸附剂。
