Abstract

In this study, a renewable biosorbent material was prepared from biological waste of widespread coastal plant, Zostera marina and employed for the biosorption of heavy metal pollution from water environment in green way. Manganese was selected as a model heavy metal to evaluate the treatment efficiency of prepared biosorbent. The batch biosorption behavior of biosorbent was investigated by the characterization, parameters evaluation, kinetic and equilibrium studies. The characterization study showed that the biosorbent has a rough surface and various binding groups for the heavy metal ions. The heavy metal concentration of 30 mg L⁻¹, time of 60 min, pH of 6 and biosorbent amount of 10 mg were determined as the optimum biosorption conditions. The pseudo-second-order equation was found to be the best among kinetic models applied. The equilibrium data were best explained by Freundlich isotherm. The maximum biosorption efficiency based on Langmuir model was predicted as 58.426 mg g⁻¹. Hence, the current work presents a renewable alternative biosorbent substance for the green treatment of heavy metal pollution from water medium.

摘要

在这项研究中，一种可再生的生物吸附剂材料是从广泛的沿海植物Zostera marina的生物废物中制备的，并被用于以绿色方式生物吸附水环境中的重金属污染。选择锰作为模型重金属以评估制备的生物吸附剂的处理效率。通过表征，参数评估，动力学和平衡研究研究了生物吸附剂的分批生物吸附行为。表征研究表明，该生物吸附剂具有粗糙的表面和重金属离子的各种结合基团。重金属浓度为30 mg L ^-1最佳时间为60分钟，pH为6，生物吸附量为10 mg。发现在应用的动力学模型中，伪二阶方程是最好的。平衡数据最好用Freundlich等温线解释。基于Langmuir模型的最大生物吸附效率被预测为58.426 mg g ^-1。因此，当前的工作提出了一种可再生的替代性生物吸附剂，用于绿色处理水介质中的重金属污染。