环境工程学报2024，Vol.18Issue(1)：51-62,12.DOI:10.12030/j.cjee.202308031
铈改性净水污泥除磷效能与机理分析
Performance and mechanism analysis of phosphorus removal by cerium-modified drinking water treatment residual
摘要
Abstract
Phosphate content is one of the important criteria for controlling the quality of the water environment,and adsorption is an efficient,clean,and economical technique for phosphate removal.In this study,cerium-modified drinking water treatment residual was used to remove phosphate by adsorption,and the effects of cerium loading,dosage,pH,and coexisting ions on phosphate adsorption were investigated to explore the adsorption mechanism and the cyclic regeneration capacity of adsorbent materials.The results showed that the phosphate adsorption process of cerium-modified drinking water treatment residual was consistent with the proposed secondary kinetics and Freundlich adsorption isotherm,and the maximum adsorption capacity was 69.43 mg·g-1.The adsorption rate was controlled by multiple factors,such as internal diffusion and the boundary layer effect.The cerium-modified drinking water treatment residual had the ability to selectively adsorb phosphate at the interference of co-existing ions such as Cl-,NO3-,CO32-,SO42-,etc.After five adsorption-desorption cycles,the removal rate of phosphate by the adsorbent material decreased by 25.4％.The adsorption mechanism is mainly electrostatic attraction and ligand exchange between phosphates and hydroxyl groups as well as cerium-containing groups.关键词
除磷/净水污泥/铈基吸附剂/配体交换Key words
phosphate removal/drinking water treatment residues/cerium-based adsorbents/ligand exchange分类
资源环境引用本文复制引用
程文雨,马潇莹,陈浩宇,陈荣升,王东田..铈改性净水污泥除磷效能与机理分析[J].环境工程学报,2024,18(1):51-62,12.基金项目
国家自然科学基金面上资助项目(51778392) （51778392）
