Batch adsorption experiments have been carried out for the removal of cationic dye, methylene blue from aqueous solutions by using Parthenium hystrophorous L. as biosorbent. The effect of major variables such as pH, initial concentration, adsorbent dose and contact time has been investigated for the sorption of methylene blue on the low cost adsorbent. Equilibrium data were fitted in Freundlich, Langmuir and Temkin isotherm models and their constants are determined. The data could best be explained by Freundlich isotherm with maximum adsorption capacity (q_o) of 40.79mgg^-1. Kinetic modeling for methylene blue adsorption is done using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. It is found that the pseudo-second-order kinetic model most appropriately described the adsorption kinetics. The result indicates that the weed biomass can effectively be used for methylene blue removal from simulated aqueous solutions.

中文翻译：

---

使用农业废料Parthenium hysterophorus L从模拟废水中去除亚甲基蓝的动力学和平衡研究

已经进行了分批吸附实验，通过使用Parthenium hystrophorous L从水溶液中去除阳离子染料亚甲基蓝。作为生物吸附剂。主要变量如的效果p H，初始浓度，吸附剂的剂量和接触时间已被研究用于亚甲蓝对低成本的吸附剂吸附。在Freundlich，Langmuir和Temkin等温模型中拟合平衡数据，并确定其常数。数据最好用Freundlich等温线解释，最大吸附容量（q _o）为40.79mgg ^-1。亚甲基蓝吸附的动力学模型是使用伪一级，伪二级和颗粒内扩散模型完成的。发现伪二级动力学模型最恰当地描述了吸附动力学。结果表明，杂草生物量可以有效地用于从模拟水溶液中去除亚甲基蓝。