Textile wastewater can be considered as a major source of surface and ground water pollution. Several techniques have been applied to treat these carcinogenic effluents. Among them, adsorption is one of the most promising technique. In this study, giant reed (Arundo donax L.) as abundantly available undesirable wild crop of no economic value was used for the first time for the removal of reactive dyes from aqueous solution. The results demonstrated that giant reed (GR) could be used as an effective biosorbent for dyes uptake. Maximum biosorption capacity was 3.940 and 2.816 mg/g for reactive blue and reactive black dyes from aqueous solution, respectively. The results revealed that the Freundlich isotherm model was adequate for describing the dyes removal process. Results of pseudo-second order kinetic model revealed best fitting with the sorption data indicating that chemisorption process is the dominant mechanism controlling the dyes removal. Furthermore, the resulted dye-loaded giant reed was recycled in concrete mixes to partially replace the fine aggregate. Tests of the mechanical properties of the modified concrete mixes indicated an environmentally friendly approach to dispose giant reed loaded with reactive black dye in concrete.

纺织废水可被视为地表和地下水污染的主要来源。已经应用了几种技术来处理这些致癌废水。其中，吸附是最有前途的技术之一。在这项研究中，巨型芦苇（Arundo donax L.），因为第一次将大量没有经济价值的不受欢迎的野生作物用于从水溶液中去除活性染料。结果表明，巨型芦苇（GR）可以用作染料吸收的有效生物吸附剂。水溶液中的活性蓝和活性黑染料的最大生物吸附量分别为3.940和2.816 mg / g。结果表明，Freundlich等温线模型足以描述染料的去除过程。伪二级动力学模型的结果表明，与吸附数据的拟合最佳，表明化学吸附过程是控制染料去除的主要机理。此外，将所得的染有染料的巨型芦苇以混凝土混合物的形式回收，以部分替代细骨料。