化工进展2025，Vol.44Issue(4)：2365-2373,9.DOI:10.16085/j.issn.1000-6613.2024-0557
污泥基FeCa-ALE复合材料对磷酸盐的吸附机制
Phosphate adsorption mechanism of sludge-based FeCa-ALE composite material
摘要
Abstract
Excessive discharge of phosphate will cause eutrophication of water body and pose a great threat to water environment safety.As a non-renewable resource,phosphate has significant recycling value.In order to obtain an adsorbent with low cost and excellent performance to effectively recover phosphate from wastewater,alginate-like exopolymers(ALE)was extracted from the residual sludge by high-temperature sodium carbonate method,and FeCa-ALE hydrogel composite was constructed.The microstructure and functional group characteristics of FeCa-ALE were analyzed by scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS)and Fourier transform infrared spectroscopy(FTIR).Static adsorption experiments showed that FeCa-ALE had good adsorption performance for phosphate,and the actual maximum adsorption capacity was 15.92mg/g at pH of 9.Pseudo-second-order kinetics,Elovich kinetic and Freundlich isotherm model could well describe the adsorption process of FeCa-ALE with respect to phosphate,indicating that the adsorption process was mainly dominated by heterogeneous chemical adsorption.The test of adsorption performance under the real water environment showed that FeCa-ALE with the characteristic of environmentally friendly and biodegradable,could resist the salinity inhibition effect to some extent and remove phosphate from real wastewater.关键词
类藻酸盐多聚物/磷酸盐/吸附动力学/吸附热力学/吸附机理Key words
alginate-like exopolymers/phosphates/adsorption kinetics/adsorption thermodynamics/adsorption mechanism分类
资源环境引用本文复制引用
王沛淦,李乐利,谢颂专,宋冰冰,孔巧平,刘改革,麻微微,施雪卿..污泥基FeCa-ALE复合材料对磷酸盐的吸附机制[J].化工进展,2025,44(4):2365-2373,9.基金项目
青岛西海岸新区科技计划科技惠民专项(2024-17) （2024-17）
山东省自然科学基金青年基金(ZR2021QE272) （ZR2021QE272）
山东省高等学校青创科技支持计划(2022KJ164). （2022KJ164）
