Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China.
Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China.
Bioresour Technol. 2021 Feb;322:124556. doi: 10.1016/j.biortech.2020.124556. Epub 2020 Dec 17.
A novel macro-architectures material FeO-N-GO@sodium alginate (SA) gel film was successfully produced, which was used to remove series azo dye wastewater. The optimal adsorption rates were attained, which achieved the maximum removal efficiency of 74.22%, 45.72%, 37.75% for Congo Red, Acid Orange 7 and Amino Black 10B respectively, under the condition that the mass ratio of FeO-N-GO to sodium alginate was 0.11. The optimal adsorption temperature for three dyes was 30 ℃ and the adsorption equilibrium was reached at 150 min. The adsorption kinetic model of FeO-N-GO@SA for the three azo dyes conformed to the quasi-second-order reaction model, and the adsorption isotherm was more in line with the Freundlich adsorption. The adsorption mechanism was multi-layer heterogeneous adsorption under the combined action of physical adsorption and chemisorption, and chemisorption was the main step of controlling the speed. The study would provide theoretical basis for the application of macro-architectures material in environment.
一种新型的宏观结构材料 FeO-N-GO@sodium alginate (SA) 凝胶膜被成功制备，并用于去除一系列偶氮染料废水。在 FeO-N-GO 与 SA 的质量比为 0.11 的条件下，对刚果红、酸性橙 7 和氨基黑 10B 的最大去除效率分别达到了 74.22%、45.72%和 37.75%。三种染料的最佳吸附温度均为 30℃，吸附平衡在 150min 时达到。FeO-N-GO@SA 对三种偶氮染料的吸附动力学模型符合准二级反应模型，吸附等温线更符合 Freundlich 吸附。吸附机制是在物理吸附和化学吸附的共同作用下的多层非均相吸附，化学吸附是控制速度的主要步骤。该研究将为宏观结构材料在环境中的应用提供理论基础。
