姜黄素修饰CNC传感器与水凝胶制备及其检测和去除Pb^(2+)的研究

Preparation of Curcumin Modified CNC Sensor and Hydrogel and Its Detection and Removal of Pb^(2+)

本研究利用EDC/NHS耦合法将姜黄素(Cur)接枝于羧基化纤维素纳米晶体(CCNC),制备纳米纤维素接枝姜黄素(CCNC-Cur)传感器和CCNC-Cur复合海藻酸钠(CCNC-Cur-SA)水凝胶吸附剂,用于检测和去除Pb^(2+)。结果表明,CCNC-Cur传感器可特异性吸附Pb2+,利用Image J软件对传感器的颜色深度进行数字化处理后,得到Pb^(2+)的检出限为6.25 mg/L;在静态吸附实验的优化条件下(吸附时间105 min、pH值=5、吸附剂用量0.08 g),CCNC-Cur-SA水凝胶对Pb2+的吸附量达98.3 mg/g。

In this study,based on curcumin(Cur)grafted carboxylated cellulose nanocrystal(CCNC)via EDC/NHS coupling method,CCNCgrafted curcumin(CCNC-Cur)sensor and CCNC-Cur compounded with sodium alginate(CCNC-Cur-SA)hydrogel adsorbents for the detection and removal of Pb2+were prepared.The results showed that the CCNC-Cur sensor had selective adsorption capacity for Pb^(2+),with Pb2+detection limit after digitizing the color depth of the sensor using Image J software of 6.25 mg/L.Under the optimized conditions of static adsorption experiment(adsorption time was 105 min,pH value was 5,adsorbent dosage was 0.08 g),the adsorption capacity towards Pb2+by CCNC-Cur-SA hydrogel reached 98.3 mg/g.