The methylene blue adsorption was carried out on a natural material powder of Acorus calamus treated firstly with H₂SO₄ and then activated by KMnO_4. The new material was called PACK. Fourier transform infrared (FT-IR) spectroscopy, pHpzc analysis, and SEM micrograph were carried out to characterize the material. Pseudo-first-order, pseudo-second-order and pseudo-nth order constant rates were calculated for analysis of the dynamics of the sorption process, showing that sorption kinetics followed a pseudo-nth order model. Among the tested isotherm models, the R-P isotherm was considered to be the most relevant to describe MB sorption onto PACK. Advanced statistical physics models, monolayer single-energy, monolayer two-energy, and double-layer two-energy were used to analyze the adsorption mechanism of methylene blue (MB) and to understand the PACK adsorbent performance. Based on the R² values obtained, the monolayer two-energy model was found to be the most suitable to describe the MB adsorption onto the PACK material. From this, the adsorption of MB was assumed on two different sites of PACK with two different energies, E₁ for the first site and E₂ for the second site. These two different receptor sites can interact with a variable number of MB molecules (n), n₁ with the first type of sites and n₂ with the second type of sites. The sorption capacity of this material was about 1500 mg/g at 30 °C. The potential of PACK, a readily available material to use as an alternative biosorbent material to eliminate the MB color from aqueous solutions, was therefore confirmed.

在先用H ₂ SO ₄处理然后用KMnO ₄活化的cal蒲天然材料粉末上进行亚甲基蓝吸附。这种新材料称为PACK。进行了傅里叶变换红外（FT-IR）光谱，pHpzc分析和SEM显微照片以表征材料。计算了伪一阶，伪二阶和伪-n阶恒定速率，以分析吸附过程的动力学，表明吸附动力学遵循伪-n阶模型。在测试的等温模型中，RP等温线被认为与描述MB在PACK上的吸附最相关。使用高级统计物理模型，单层单能，单层两能和双层两能来分析亚甲基蓝（MB）的吸附机理并了解PACK吸附剂的性能。基于获得的R ²值，发现单层两能模型最适合描述MB在PACK材料上的吸附。据此，假定MB在具有两个不同能量的PACK的两个不同位置上吸附MB ，第一个位置E ₁和E ₂对于第二个站点。这两种不同的受体位点可以与MB分子的可变数目（相互作用Ñ），Ñ ₁与第一类型的网站和Ñ ₂与第二类型的网站。该材料在30°C下的吸附容量约为1500 mg / g。因此，证实了PACK的潜力，PACK是一种易于使用的材料，可以用作替代生物吸附剂，以消除水溶液中的MB颜色。