有机坡缕石黏土对活性染料的吸附性能

由阴、阳离子表面活性剂对坡缕石黏土改性,通过静态吸附实验研究了有机坡缕石黏土对活性红的吸附性能,探讨了吸附平衡和吸附机理。结果表明,表面活性剂改性可增强坡缕石黏土表面的疏水性,影响ζ电位,适当配比的阴阳离子表面活性剂改性坡缕石黏土对活性红有协同吸附作用,吸附等温线呈非线性,符合Langmuir方程和Freundlich方程,ΔH为-12.23 k J/mol,吸附不存在强化学作用,是分配作用和氢键力、偶极间力及范德华力等多种作用的结果。

Adsorption of reactive dye on organopalygorskite clay

In this study, organopalygorskite clays were prepared as the adsorbent by using anionic and cationic surfactant as modifiers, and the adsorption properties and mechanisms of adsorption of reactive red were investigated, with a discussion on the adsorption thermodynamics. The results demonstrate that the hydrophobicity of organopalygorskite clay surface is enhanced and Zeta potentials are influenced, and anion-cation organopalygorskite clays possess the synergic adsorption of the reactive red in water within the appropriate ratio. The adsorption isotherms are nonlinear and can be described by Langmuir and Freundlich equations, and adsorption enthalpy is -12.23 kJ·mol^-1. There is no strong chemical interaction in the adsorption process and adsorption is mainly expressed as the collaborative effects of partition, hydrogen bond forces, dipole bond forces, van der Waals forces etc.