Sawdust of acacia tree has been successfully used to remove textile dyes from wastewater due to its good sorption properties and its good chemical stability. Two materials are prepared by chemical treatment, including acidic and basic sawdust of acacia. The biosorption tests were carried out on two synthetic dyes of textile which are methylene blue (MB) and brilliant blue (BB). Efficient removal of the both dyes has been achieved by the basic treated sawdust acacia. The modeling of biosorption kinetic shows that the biosorption of MB and that of BB are well described by the pseudo-first-order model for both the chemically treated biosorbents. Equilibrium data have also established using Langmuir and Freundlich isotherm models. Langmuir biosorption capacities are 8.13 and 267.04 mg/g onto basic sawdust acacia and 6.19 and 230.76 mg/g onto acidic sawdust acacia, respectively, for BB and MB sorption. A real final effluent of a textile industry was treated by sorption on both biosorbent basis of sawdust acacia. In fact, the kinetic sorption was rapid with a mass ratio of 1 g/L. However, the biosorption process combined with a biological treatment provides a better result through the physicochemical characteristics of the studied effluent.

中文翻译：

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化学处理的金合欢木屑去除纺织染料：动力学和平衡研究

由于其良好的吸附性能和良好的化学稳定性，金合欢树锯屑已成功用于去除废水中的纺织染料。两种材料通过化学处理制备，包括酸性和碱性相思木屑。对两种纺织品合成染料亚甲蓝 (MB) 和亮蓝 (BB) 进行了生物吸附测试。经碱性处理的金合欢木屑可有效去除这两种染料。生物吸附动力学模型表明，MB 和 BB 的生物吸附都可以通过化学处理的生物吸附剂的伪一级模型很好地描述。还使用 Langmuir 和 Freundlich 等温线模型建立了平衡数据。Langmuir 对基本锯末金合欢和 6.19 和 230 的生物吸附能力分别为 8.13 和 267.04 毫克/克。对于 BB 和 MB 的吸附，酸性锯末金合欢分别为 76 mg/g。一个真正的纺织工业最终流出物是通过在锯末金合欢两种生物吸附剂基础上进行吸附处理的。事实上，动力学吸附速度很快，质量比为 1 g/L。然而，结合生物处理的生物吸附过程通过所研究流出物的物理化学特性提供了更好的结果。