Preparation of iron-aluminum composite oxides/chitosan particles and study on their adsorption performance to phosphates
NING Jun1, TIAN Lin1, ZHAN Ming-fei1, XIANG Xian-ling2
1. Anhui Shuiyun Environmental Protection Co., Ltd., Wuhu 241000, China; 2. School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
Abstract: Fe-Al composite oxides/chitosan particles (FACP) are prepared through modifying chitosan by Fe-Al composite oxides and used to remove phosphates from eutrophic water.The results indicate that the adsorption capacity of FACP to phosphates reaches 2.033 mg·g-1, much higher than either the 0.168 mg·g-1 of chitosan or the 1.533 mg·g-1 of Fe-Al composite oxides when the initial concentration of phosphates solution is 30 mg·L-1, the volume of solution is 300 mL, the adsorbent dosage is 10 g·L-1, the temperature is at 25±1℃, the oscillation lasts for 96 h at a speed of 150 r·L-1.When the solution has an initial pH value of 3, the maximum adsorption capacity of FACP to phosphates is 0.99 mg·g-1.The addition of NaCl in the solution has little impact on the adsorption of phosphates by FACP, indicating that FACP has selective adsorption on phosphates.It is found by kinetic model fitting that the adsorption process of FACP is jointly controlled by liquid film diffusion and internal diffusion.It is shown through Langmuir model simulation that the maximum adsorption capacity of FACP to phosphates is 11.05 mg·g-1.
宁军, 田琳, 占明飞, 项贤领. 铁铝复合氧化物/壳聚糖颗粒的制备及其对磷酸盐吸附性能的研究[J]. 现代化工, 2021, 41(11): 122-127.
NING Jun, TIAN Lin, ZHAN Ming-fei, XIANG Xian-ling. Preparation of iron-aluminum composite oxides/chitosan particles and study on their adsorption performance to phosphates. Modern Chemical Industry, 2021, 41(11): 122-127.
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