Li Chunhua, Zhang Xieyang, Li Deshui, Luan Guanqun, Hu Xiaoyu, Zhao Zhilei, Fang Lide
College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; National & Local Joint Engineering Research Center of Metrology Instrument and System, Hebei University, Baoding 071002, China; Engineering Research Center of Zero-carbon Energy Buildings and Measurement Techniques, Ministry of Education, Hebei University, Baoding 071002, China.
College of Quality and Technical Supervision, Hebei University, Baoding 071002, China.
Food Chem. 2025 Sep 1;485:144483. doi: 10.1016/j.foodchem.2025.144483. Epub 2025 Apr 24.
Heavy metal ions (HMIs) in food pose significant health risks due to their bioaccumulation and toxicity, necessitating effective detection and remediation methods. This study explores a multifunctional hydrogen-bonded organic framework (HOF-16) wrapped in sodium alginate (SA) to form a stable HOF-16/SA aerogel for detecting and removing HMIs in pear juice. The HOF-16 fluorescence probe exhibits excellent sensitivity with limits of detection of 0.49, 0.60, and 0.44 μmol/L for Pb(II), Cu(II), and Cd(II), respectively. The maximum adsorption capacities of HOF-16/SA aerogel for Pb(II), Cu(II), and Cd(II) are 284.69, 248.08, and 183.94 mg/g, respectively. The removal efficiency of HOF-16/SA aerogel for HMIs in pear juice exceeds 98 % without negative impacts. Sensitive detection of HMIs is attributed to the fluorescence quenching effect caused by electron transfer, while electrostatic interactions and complexation enhance the effective adsorption performance. This study provides a HOF-aerogel platform with great potential for detecting and removing HMIs from food matrix.
食品中的重金属离子（HMIs）由于其生物累积性和毒性而构成重大健康风险，因此需要有效的检测和修复方法。本研究探索了一种包裹在海藻酸钠（SA）中的多功能氢键有机框架（HOF-16），以形成一种稳定的HOF-16/SA气凝胶，用于检测和去除梨汁中的重金属离子。HOF-16荧光探针表现出优异的灵敏度，对Pb（II）、Cu（II）和Cd（II）的检测限分别为0.49、0.60和0.44 μmol/L。HOF-16/SA气凝胶对Pb（II）、Cu（II）和Cd（II）的最大吸附容量分别为284.69、248.08和183.94 mg/g。HOF-16/SA气凝胶对梨汁中重金属离子的去除效率超过98%，且无负面影响。对重金属离子的灵敏检测归因于电子转移引起的荧光猝灭效应，而静电相互作用和络合作用增强了有效吸附性能。本研究提供了一个具有巨大潜力的HOF-气凝胶平台，用于从食品基质中检测和去除重金属离子。
