[1]姜其,岑渝华,朱玥,等.树脂基水合氧化铈复合材料深度去除污水中磷酸盐[J].中国给水排水,2021,37(3):99-103.
　JIANG Qi,CEN Yu-hua,ZHU Yue,et al.Deep Removal of Phosphate in Wastewater by Resin-based Hydrated Cerium Oxide Composite[J].China Water & Wastewater,2021,37(3):99-103.
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树脂基水合氧化铈复合材料深度去除污水中磷酸盐

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第3期 页码: 99-103 栏目: 出版日期: 2021-02-01
Title:
Deep Removal of Phosphate in Wastewater by Resin-based Hydrated Cerium Oxide Composite
作者:
姜其，岑渝华，朱玥，施如艳，陆晨阳，史新星，杨文澜
(扬州大学环境科学与工程学院,江苏扬州225127)
Author(s):
JIANG Qi,CEN Yu-hua,ZHU Yue,SHI Ru-yan,LU Chen-yang,SHI Xin-xing,YANG Wen-lan
(College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)
关键词:
纳米复合吸附剂; 水合氧化铈; 磷; 选择性去除
Keywords:
nanocomposite adsorbent; hydrated cerium oxide; phosphate; selective removal
摘要:
通过“前驱体导入-原位沉积”的工艺路线，将水合氧化铈（HCO）纳米颗粒负载入强碱阴离子交换树脂（SAE）孔道内，制得复合纳米吸附剂HCO@SAE并用于污水中磷酸盐的深度去除。试验结果表明：与其母体材料SAE、粉末活性炭（PAC）和大孔吸附树脂XAD-4相比，HCO@SAE具有最佳的磷酸盐吸附性能。溶液pH值对HCO@SAE吸附磷酸盐的性能有较大影响，且在中性条件下可获得最大的磷酸盐吸附量（30.96 mgP/g）。得益于负载HCO纳米颗粒对磷酸盐的专属内配位络合作用，HCO@SAE能够在共存高浓度竞争离子的条件下实现对磷酸盐的选择性吸附。采用NaOH-NaCl混合溶液作为脱附剂可实现对吸附饱和HCO@SAE的高效再生，再生后吸附性能保持稳定，从而实现多批次循环吸附操作。
Abstract:
Hydrated cerium oxide (HCO) nanoparticles were loaded into strong-base anion exchanger (SAE) through the process of “precursor lead-in and in-situ deposition”, and a composite nano adsorbent HCO@SAE was prepared and used for deep removal of phosphate in wastewater. HCO@SAE exhibited the best phosphate removal performance as compared to its host materials: SAE, powder activated carbon (PAC) and macroporous polystyrene resin (XAD-4). The pH value of the solution had a great influence on phosphate adsorption performance of HCO@SAE, and the maximum phosphate adsorption capacity (30.96 mgP/g) could be obtained at neutral pH. Benefiting from the inner-sphere complexation between phosphate and the loaded HCO nanoparticles, HCO@SAE was capable of selective adsorbing phosphate even coexisting with high levels of other competing anions. More attractively, the exhausted HCO@SAE could be effectively regenerated by using NaOH-NaCl binary solution as the desorbent. After regeneration, its adsorption performance remained stable, thus realizing multi-batch cyclic adsorption operation.
更新日期/Last Update: 2021-02-01