ABSTRACT

Natural fiber as adsorbents is an emerging trend in effluent treatments as the fibers are environmental friendly, abundantly available and superior to polymeric-based materials. In this study, fiber extracted from the banana pseudostem was tested as an adsorbent. The lead (Pb (II)) removal was assessed with various parameters, namely, pH, agitation speed, adsorbent dosage and contact time. Removal efficiency was found maximum in alkaline conditions (pH 10) with a contact time of 140 min. Its efficiency was further optimized for adsorbent dosage and agitation speed. Between the isothermic model and Temkin isotherm model predicted the conditions better by providing the highest respective coefficient of determination (R^{2 –} 0.9942). Similarly, the kinetics for adsorption was fitted well with pseudo-second-order kinetic model. Banana pseudostem fiber (BPF) could be a promising source and low-cost adsorbent to remove toxic heavy metals in industrial effluents.

摘要

天然纤维作为吸附剂是污水处理的新兴趋势，因为这种纤维对环境友好、资源丰富且优于聚合物基材料。在这项研究中，从香蕉假茎中提取的纤维作为吸附剂进行了测试。使用各种参数评估铅 (Pb (II)) 的去除率，即 pH 值、搅拌速度、吸附剂剂量和接触时间。在接触时间为 140 分钟的碱性条件（pH 10）中，去除效率最高。其效率针对吸附剂用量和搅拌速度进行了进一步优化。在等温模型和 Temkin 等温模型之间，通过提供最高的各自确定系数 (R ^{2 –}0.9942）。类似地，吸附动力学与准二级动力学模型很好地拟合。香蕉假茎纤维 (BPF) 可能是一种有前途的来源和低成本吸附剂，可去除工业废水中的有毒重金属。