通过共沉淀法制备了层状双金属氢氧化物Mg/Al/Fe-LDHs，考察了LDHs投加质量、苯酚初始质量浓度、溶液pH和反应温度（T）对苯酚吸附特性的影响。结果表明，LDHs投加质量为0.5 g、苯酚初始质量浓度为10 mg/L、pH=8.0、T=35℃最佳吸附条件下，平衡吸附量达17.41 mg/g。吸附过程符合一级动力学方程，吸附速率为0.021 7 min^-1，平衡吸附量为9.30 mg/g。吸附前后材料的XRD和FT-IR表征结果表明，LDHs吸附苯酚机理不仅涉及表面吸附，还包括LDHs板层结构重建和羟基离子置换。

Mg/Al/Fe-layered double metal hydroxides (LDHs) are prepared via co-precipitation method.The influences of LDHs dosage, initial concentration of phenol, pH value of solution and reaction temperature on phenol adsorption are investigated.Results show that the maximum adsorption capacity reaches 17.41 mg·g^-1 under the optimal adsorption conditions that the dosage of LDHs is 0.5 g, the initial concentration of phenol is 10 mg·L^-1, pH=8.0 and T=35℃.It is verified that the adsorption process fits the first-order kinetic equation, with an adsorption rate of 0.021 7 min^-1 and an equilibrium adsorption capacity of 9.30 mg·g^-1.The results through XRD and FT-IR characterization on the material before and after adsorption indicate that the adsorption mechanism of phenol by LDHs involves surface adsorption, structure reconstruction of LDHs layers and replacement of hydroxyl ion.

杨溢(1988-),男,硕士,高级工程师,主要从事煤矿、电力、煤焦化污废水处理及煤基固废处置方面的研究,512205959@qq.com。