Background: Due to an abrupt increase in the contamination of freshwater systems by dye-containing wastewater, there is an urgent need to find robust and greener adsorbents for the elimination of dyes from the contaminated water. As the dyes not only change the appearance of water but are also a cause of many serious problems, which can be some time mutagenic and carcinogenic.

Methods: This research paper is based on the use of adsorbent made from the peel of jackfruit (POJ). The adsorbent derived from agriculture waste was at low cost and efficient for the elimination of methylene blue (MB) dye from aqueous media. Batch adsorption experiments were accompanied by varying the pH of the solution, contact time, POJ dosage, and initial MB concentration.

Results: It was seen that adsorption of MB onto Jackfruit peel adsorbent follows pseudo-secondorder (PSO) kinetics and Langmuir isotherm with maximum biosorption capacity of 232.55 mg/g. The thermodynamic study revealed that the adsorption was spontaneous, endothermic, and associated with the rise in entropy.

Conclusion: In view of the low-cost and promising adsorption efficiency, the present investigation submits that that POJ is novel and economically feasible adsorbent for the removal of MB from aqueous solutions.

背景：由于含染料废水对淡水系统的污染突然增加，迫切需要找到更强大、更环保的吸附剂，以消除受污染水中的染料。由于染料不仅会改变水的外观，而且还会导致许多严重的问题，这些问题在一段时间内可能会引起突变和致癌。

方法：本研究论文基于使用菠萝蜜果皮 (POJ) 制成的吸附剂。源自农业废弃物的吸附剂成本低，可有效去除水介质中的亚甲蓝 (MB) 染料。批量吸附实验伴随着溶液的 pH 值、接触时间、POJ 剂量和初始 MB 浓度的变化。

结果：可以看出，菠萝蜜果皮吸附剂上的 MB 吸附遵循伪二级 (PSO) 动力学和 Langmuir 等温线，最大生物吸附容量为 232.55 mg/g。热力学研究表明吸附是自发的、吸热的，并与熵的增加有关。

结论：鉴于低成本和有前景的吸附效率，本研究表明 POJ 是一种新颖且经济可行的吸附剂，用于从水溶液中去除 MB。