A multifunctional composite Fe3O4/MOF/L-cysteine for removal, magnetic solid phase extraction and fluorescence sensing of Cd(II)

作者：Fan, Lu; Deng, Min; Lin, Caixue; Xu, Chen; Liu, Yana; Shi, Zhennan; Wang, Yingxi; Xu, Zushun; Li, Ling^*; He, Man^*

来源：RSC Advances, 2018, 8(19): 10561-10572.

DOI：10.1039/c8ra00070k

• HEAVY-METAL IONS
• ENVIRONMENTAL WATER SAMPLES
• ACID LIGAND
• ICP-AES
• CD2+
• ADSORPTION
• CADMIUM
• NANOPARTICLES
• TOXICITY
• RECOVERY

Fe3O4/MOF (metal organic framework)/l-cysteine was synthesized and applied for the removal of Cd(ii) from wastewater. The adsorption kinetics and isotherms were investigated, and the results indicated that the adsorption obeyed the pseudo-second-order kinetic model and Langmuir isotherm. The maximum adsorption capacity was calculated to be 248.24 mg g(-1). Fe3O4/MOF/l-cysteine was further applied to determine trace amounts of Cd(ii) in real water samples using ICP-AES (inductively coupled plasma-atomic emission spectroscopy) based on magnetic solid-phase extraction (MSPE). The determination limit was 10.6 ng mL(-1). Additionally, Fe3O4/MOF/l-cysteine can also be used as a fluorescent sensor for turn-off detection of Cd(ii), and the detection limit was 0.94 ng mL(-1).

• 出版日期2018
• 单位湖北大学; 武汉大学