摘要
采用共沉淀法制备了沸石负载纳米氧化铁复合材料(沸石@Fe_(3)O_(4)),并采用静态吸附试验探究了pH、吸附动力学、等温吸附模型及热力学等对沸石@Fe_(3)O_(4)吸附模拟氨氮废水溶液的影响。试验表明,当溶液pH为6时,沸石@Fe_(3)O_(4)对水中氨氮的吸附能力达到最高值,随溶液中pH的升高,沸石@Fe_(3)O_(4)对水中磷的吸附能力逐渐降低。可采用准二级动力学模型描述沸石@Fe_(3)O_(4)对水中氨氮和磷的吸附动力学过程。Langmuir吸附等温线模型的线性拟合结果表明,氨氮和磷最大理论单位吸附量分别为7.92和9.09mg/g。
Zeolite@Fe_(3)O_(4) composite was prepared by co-precipitation method.Effects of pH value,adsorption kinetics,isothermal adsorption model and thermodynamics on adsorption of simulated ammonia nitrogen wastewater were investigated by static adsorption experiment.The results show that when pH value of solution is 6,adsorption capacity of zeolite@Fe_(3)O_(4) composite to ammonium in water reaches the highest value.Adsorption capacity of zeolite@Fe_(3)O_(4) composite for phosphorus in water gradually drops with increase of pH value of solution.Adsorption kinetics of ammonia nitrogen and phosphorus in water by zeolite@Fe_(3)O_(4) composite satisfies well the quasi-secondary kinetic model.The linear fitting results of Langmuir adsorption isotherm model shows that the maximum theoretical unit adsorption capacity of ammonia nitrogen and phosphorus are 7.92 mg/g and 9.09 mg/g respectively.
作者
卓振
张卫民
陈家鸿
陈俊华
ZHUO Zhen;ZHANG Wei-min;CHEN Jia-hong;CHEN Jun-hua(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2021年第6期101-108,共8页
Nonferrous Metals（Extractive Metallurgy)
基金
江西省自然科学基金资助项目(20202BABL204069)。
