Hong Junming, Lin Bing, Hong Gui-Bing, Chang Chang-Tang
J Nanosci Nanotechnol. 2014 Apr;14(4):3247-51. doi: 10.1166/jnn.2014.8638.
The adsorption of methylene blue (MB) onto pore-expanded calcium fluoride sludge (ECF) by the batch adsorption technique was investigated. The results showed that the adsorption capacity increased with increasing MB concentration but decreased as pH was increased. In order to investigate the adsorption mechanisms, three simplified isotherm models and kinetic models were used in this study. The best-fit adsorption isotherm was achieved with the Temkin model. Furthermore, the pseudo-second-order kinetic model agreed very well with the dynamical behavior for the adsorption of MB onto ECF. Thermodynamic studies revealed that the adsorption process of MB onto ECF was spontaneous and exothermic. The results indicated that ECF adsorbed MB efficiently and could be used as a waste adsorbent for the removal of cationic dyes in wastewater treatment.
采用分批吸附技术研究了亚甲基蓝（MB）在孔径扩大的氟化钙污泥（ECF）上的吸附情况。结果表明，吸附容量随MB浓度的增加而增加，但随pH值的升高而降低。为了研究吸附机理，本研究使用了三种简化的等温线模型和动力学模型。Temkin模型实现了最佳拟合吸附等温线。此外，准二级动力学模型与MB在ECF上的吸附动力学行为非常吻合。热力学研究表明，MB在ECF上的吸附过程是自发的且放热的。结果表明，ECF能有效吸附MB，可作为一种废弃吸附剂用于废水处理中阳离子染料的去除。
