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以磁性纳米铁酸锰(MnFe_2O_4)和磁性纳米四氧化三铁(Fe_3O_4)以及羟基铁(FeO_xH_y)作为吸附剂去除水中磷酸盐,研究了3种含铁材料对磷酸盐的吸附性能与机理。研究结果表明,3种吸附剂对磷酸盐的吸附过程均为物理化学吸附,吸附速度大小为Fe_3O_4>MnFe_2O_4>FeO_xH_y;FeO_xH_y和MnFe_2O_4的吸附性能要优于Fe_3O_4,三者的最大饱和吸附容量分别为29.836、21.970、1.314 mg/g;pH会影响吸附剂的吸附效果,酸性越强,吸附效果越好;吸附前后的ξ电位表明,3种吸附剂带电性受pH影响较大,ξ电位绝对值随pH的增大而增大。磁性纳米铁酸锰对磷酸盐表现出良好的吸附性能,其作为1种新型吸附材料具有一定的研究和应用前景。
Ferric phosphate was adsorbed on ferric manganese ferrite (MnFe 2 O 4), ferroferric oxide (Fe 3 O 4) and ferric hydroxide (FeO_xH_y) as adsorbents. The adsorption properties and mechanism of three ferrous materials on phosphate were studied. The results show that all three adsorbents adsorb phosphates by physicochemical adsorption, the adsorption rate is Fe 3 O 4> MnFe 2 O 4> FeO_xH_y, the adsorption performance of FeO_xH_y and MnFe 2 O 4 is better than that of Fe 3 O 4, the maximum adsorption capacities of the three are 29.836,21.970,1.314 mg / g; pH will affect the adsorption effect of the adsorbent, the stronger the acidity, the better the adsorption effect; the zeta potential before and after adsorption shows that the three kinds of adsorbents are greatly affected by the pH, the absolute value of zeta potential With increasing pH increases. Magnesium manganese ferrite shows good adsorption properties for phosphate, which has certain research and application prospects as a new kind of adsorbent.