湖南生态科学学报2024，Vol.11Issue(1)：31-38,8.DOI:10.3969/j.issn.2095-7300.2024.01.005
铁磷共沉淀去除水中磷酸根的效果及机制
Effect and Mechanism of Phosphate Removal by Iron-Phosphorus Coprecipitation
摘要
Abstract
[Objective]This experiment explores the influence of environmental conditions on phosphorus removal by Fe salts and its potential mechanism,which provides a theoretical basis for the development and application of phosphorus removal technology from wastewater.[Method]The effects of different pH values and Fe/P molar ratios on phosphate removal were investigated by macroscopic phosphorus removal tests.The mechanism of phosphorus removal during chemical precipitation and adsorption was investigated by X-ray diffraction(XRD)and thermodynamic model.[Result]With the increase in pH,P removal first increased and then decreased.With the increase of Fe/P ratio,the phosphorus removal rate showed an increasing trend.When the reaction conditions were pH=5 and Fe∶P=3∶1,the P removal rate was the highest and reached 89.42%.XRD characterization and thermodynamic model results showed that P was removed from the liquid phase mainly through the formation of Fe-P precipitates,such as FePO4,or being adsorbed by iron oxides.[Conclusion]The two mechanisms of coprecipitation and adsorption exist in the process of phosphorus removal by iron salt.Among them,pH has an effect on both of them,and Fe/P molar ratio mainly affects the adsorption to change the removal efficiency of phosphorus.关键词
铁盐除磷/共沉淀/吸附/热力学模型/污水除磷/铁磷摩尔比Key words
iron salts remove phosphorus/coprecipitation/adsorption/hermodynamic models/phosphorus removal from wastewater/Fe/P molar ratio分类
化学化工引用本文复制引用
柳开颜,彭梅楷,郭晓辉,杜辉辉,雷鸣,卢磊,彭唐鑫彦,熊羽彤,刘孝利,彭芸,刘闯,刘颖华,胡海波..铁磷共沉淀去除水中磷酸根的效果及机制[J].湖南生态科学学报,2024,11(1):31-38,8.基金项目
生态环境部长江生态环境保护修复城市驻点跟踪研究(2022-LHYJ-02-0507-01) （2022-LHYJ-02-0507-01）
湖南省大学生创新训练计划项目(S202310537047) （S202310537047）
