The experimental data of kinetic adsorption were fit to dynamic equation: t/Xd(t) = t/Xd(eq)+B.The exchange adsorption capacity of lignite for Cu2+ could be greatly increased when it was sulphonated.

• 结果表明广西褐煤对Cu2+有较快的吸附速度；吸附动力学符合交换平衡动力学模式:t/Xd(t)=t/Xd(eq)+B.；广西褐煤经磺化处理后吸附能力大幅提高；褐煤磺化样的饱和吸附量达到32