姜黄素修饰CNC传感器与水凝胶制备及其检测和去除Pb2+的研究

Preparation of Curcumin Modified CNC Sensor and Hydrogel and Its Detection and Removal of Pb2+

关键词:  纤维素纳米晶体  CNC接枝姜黄素  Pb²⁺  比色传感器  吸附

Key Words:cellulose nanocrystal  CCNC-grafted curcumin  Pb²⁺  colorimetric sensor  adsorption

摘要: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Pb²⁺。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Pb²⁺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。

Abstract:In this study， based on curcumin （Cur）grafted carboxylated cellulose nanocrystal （CCNC） via EDC/NHS coupling method， CCNC-grafted 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 Pb²⁺， 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.