A tropical wild fern, Diplazium esculentum, locally known as Pakis, was investigated in this study as a low-cost adsorbent for the removal of toxic crystal violet (CV) dye. The adsorbent–adsorbate system reached equilibrium in 180 min and data obtained from batch adsorption experiment were best fitted with the Sips isotherm model. High maximum adsorption capacity (q_max) of 350.86 mg/g compared to many other reported adsorbents revealed the potential of this fern as a low-cost, new adsorbent for the removal of CV. Adsorption mechanism followed the pseudo second-order kinetics. Another attractive feature is its ability to be regenerated and reused, especially when using the base treatment, while maintaining high adsorption of >96% even at the fifth consecutive cycles.

在这项研究中，对热带野生蕨类植物Diplazium esculentum（当地称为Pakis）进行了研究，它是一种低成本的吸附剂，用于去除有毒的结晶紫（CV）染料。吸附剂-吸附剂系统在180分钟内达到平衡，从批次吸附实验获得的数据最适合Sips等温模型。与许多其他已报道的吸附剂相比，其最高的最大吸附容量（q _max）为350.86 mg / g，表明该蕨类作为低成本，新型吸附剂去除CV的潜力。吸附机理遵循伪二级动力学。另一个吸引人的特点是它具有再生和再利用的能力，特别是在使用碱处理剂时，即使在第五个连续循环中也能保持> 96％的高吸附率。