α-FeOOH微粒的制备及其对亚甲基蓝的吸附效果研究

【作者】 徐寸发； 朱晓萌； 张晋华；

【机构】 南京理工大学环境与生物工程学院；

【摘要】 采用水热合成法制备一种新型的α-FeOOH微粒,通过XRD、FT-IR、SEM和Zeta电位对其形态、结构和表面性能进行表征,并研究其对水溶液中亚甲基蓝的吸附效果。结果表明:Fe³⁺与十二烷基硫酸钠（SDS）的摩尔比和水热时间影响α-FeOOH微粒的形态;当微乳液的pH=9时合成出来的微粒含有α-Fe₂O₃;在温度30℃,亚甲基蓝水溶液的pH=5,初始亚甲基蓝浓度为200mg/L时,用0.5g/L的α-FeOOH微米颗粒可以去除96%的亚甲基蓝,吸附容量为385mg/g;同时,获得吸附动力学,符合伪二级模型。更多还原

【Abstract】 A novel α-FeOOH microparticles was prepared by hydrothermal method.The morphology,chemical structure and surface properties of the as-prepared α-FeOOH microparticles were characterized byXRD,FT-TR,SEM and Zata potential,then its adsorption efficiency to methylene blue（MB） was researched.Experimental results reveal that the molar ratio of Fe³⁺ and sodium dodecylsulfate（SDS） and hydrothermal time affect the morphology of the as-synthesized α-FeOOH microparticles.α-Fe₂O₃ particles were produced when the pH of the microemulsion was 9.The results indicate that the 96% MB removal could be attained at a solution pH of 5,initial MB concentration of 200 mg/L,α-FeOOH dosage of 0.5 g/L and temperature 30℃,and the adsorption capacity is 385 mg/g.Kinetics data were obtained and better fitted by pseudo-second-order kinetic model.更多还原