【摘要】 本文制备了一种磁性纳米吸附剂（Fe₃O₄@PDA/HA），并将其用于葡萄酒中过量Cu²⁺的去除。通过SEM、FT-IR、XRD、TGA、VSM等表征方法探究了该吸附剂的理化特性；以吸附动力学和吸附热力学试验探究其对Cu²⁺的吸附机理；同时将其应用于干红/白葡萄酒中综合评价了其吸附性能及对酒质的影响。结果表明，Fe₃O₄@PDA/HA表面具有丰富的吸附位点且其具有良好的耐酸性能和超顺磁性；其对Cu²⁺的吸附量为80.2 mg·g^-1，该值比一些研究报道的吸附剂高2～10倍。另外，Fe₃O₄@PDA/HA具有较好的稳定性，经5次循环使用后仍能保持约75%的Cu²⁺吸附效率，且不会导致葡萄酒品质劣变。因此，本研究中Fe₃O₄@PDA/HA是控制葡萄酒Cu²⁺含量的理想吸附剂。更多还原

【Abstract】 A new magnetic adsorbent （Fe₃O₄@PDA/HA） was prepared and used for the removal of excess Cu²⁺ from wine in present study.The physicochemical properties of the adsorbent were investigated by SEM,FT-IR,XRD,TGA,VSM and other characterization methods.Adsorption kinetics and thermodynamics experiments were conducted to reveal the adsorption mechanism of Cu²⁺,and its adsorption performance and influence on wine quality were comprehensively evaluated by applying it to dry red/white wines.The results showed that Fe₃O₄@PDA/HA has good acid resistance and superparamagnetism,benefiting from the abundant adsorption sites on the surface,adsorption capacity of Fe₃O₄@PDA/HA toward Cu²⁺ was 80.2 mg·g^-1,which was 2-10 times higher than that of other adsorbents reported in other studies.Moreover,due to excellent stability,its adsorption capacity maintained about 75% of Cu²⁺ adsorption efficiency after 5 cycles,and the magnetic adsorbent did not lead to the deterioration of wine quality.Therefore,Fe₃O₄@PDA/HA is an ideal adsorbent for controlling Cu²⁺ content in wine in this study.更多还原