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将铁锰氧化物与坡缕石黏土结合制备了复合材料FO/P、MO/P和FMO/P,由静态吸附实验研究了复合材料吸附磷的性能,考察了氧化物与坡缕石质量比、焙烧温度、溶液p H值、离子强度和振荡时间对吸附量的影响,探讨了吸附动力学、吸附平衡和机理。结果表明,FMO/P的吸附性能优于FO/P和MO/P,铁锰氧化物与坡缕石黏土的质量比为0.1的FMO/P对20mg/L的磷溶液去除率可达95%,吸附量明显受溶液p H的影响,离子强度对吸附量影响较小,磷吸附在复合材料表面主要形成内层络合物,60 min可基本达吸附平衡,过程符合pseudo-second-order方程,具有化学吸附的性质,FMO/P吸附等温线符合Freundlich方程,有不均匀吸附的性质,饱和吸附量达49 mg/g。
The composites FO / P, MO / P and FMO / P were prepared by the combination of Fe-Mn oxide and palygorskite clay. The adsorption of phosphorus on the composites was studied by static adsorption experiments. The effects of the mass ratio of oxide to palygorskite , Calcination temperature, p H value, ionic strength and oscillation time on the adsorption capacity were discussed. The adsorption kinetics, adsorption equilibrium and mechanism were discussed. The results showed that the FMO / P adsorption performance was better than that of FO / P and MO / P, and the removal rate of FMO / P with 20 mg / L of Fe-Mn oxide and palygorskite was 95% , The amount of adsorption was significantly affected by the solution p H, and the ionic strength had little effect on the adsorption capacity. The phosphorus adsorbed on the surface of the composite mainly formed the inner complex, which reached the equilibrium adsorption equilibrium at 60 min. The process was in accordance with the pseudo-second-order equation , With chemisorption properties. The FMO / P adsorption isotherm conformed to the Freundlich equation and had an inhomogeneous adsorption property, with a saturated adsorption capacity of 49 mg / g.