山东农业大学学报（自然科学版）2026，Vol.57Issue(3)：503-516,14.DOI:10.3969/j.issn.1000-2324.2026.03.011
改性壳聚糖/纳米TiO2微球的制备及其对磷酸盐的吸附研究
Preparation of Modified Chitosan/Nano-Tio2 Microspheres and Their Adsorption of Phosphate
摘要
Abstract
Excessive phosphate can lead to eutrophication of water bodies.In this study,chitosan is used as the raw material to introduce quaternary ammonium cations onto the amino groups of chitosan,and nano-TiO2 is loaded to prepare Microsphere Titanium dioxide Hydroxypropyltrimethylammonium Chloride Chitosan(MTHAC)via a gel-embedding method.The adsorption performance of MTHAC for phosphate in water is investigated.The microspheres are characterized by FTIR,XRD,and Zeta.The adsorption conditions are optimized using response surface methodology,and the adsorption kinetics and isotherm models are fitted to study the adsorption mechanism.The results indicate that the MTHAC surface exhibits a granular structure,with TiO ₂ uniformly distributed across it,and abundant amino active sites between particles.The MTHAC maintains a positive surface charge within a pH range of 2-8.Under optimized conditions(pH 3,initial phosphate concentration of 50.0 mg·L-1,and adsorption time of 20 h),the maximum adsorption capacity of the composite microspheres reaches 48.7 mg·g-1 with a removal efficiency of 97.3%.The adsorption process follows the pseudo-second-order kinetic model and the Langmuir isotherm model,revealing a monolayer adsorption mechanism dominated by ligand exchange and electrostatic interactions.MTHAC shows favorable recyclable adsorption capacity for phosphate and exhibits significant bacteriostatic activity against Escherichia coli and Staphylococcus aureus.It holds promising potential as a dual-functional phosphorus-removing material integrating bacteriostatic and adsorption properties for application in wastewater treatment.关键词
壳聚糖/二氧化钛/吸附/磷酸盐Key words
Chitosan/titanium dioxide/adsorption/phosphate分类
资源环境引用本文复制引用
王成,李玉,陈汉翔,魏丽杰,陈丽..改性壳聚糖/纳米TiO2微球的制备及其对磷酸盐的吸附研究[J].山东农业大学学报（自然科学版）,2026,57(3):503-516,14.基金项目
江苏省海洋资源开发技术创新中心海洋科技项目(LWKJ-02) （LWKJ-02）
江苏省海洋科技创新专项项目(HY2018-10) （HY2018-10）
江苏省"333工程"高层次人才资助项目(BRA2014111) （BRA2014111）
连云港市"521高层次人才培养工程"资助项目(LYG52105-2018028) （LYG52105-2018028）
