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Preparation of Curcumin Modified CNC Sensor and Hydrogel and Its Detection and Removal of Pb2+
Received:March 04, 2024  
DOI：10.11980/j.issn.0254-508X.2024.08.005
Key Words:cellulose nanocrystal  CCNC-grafted curcumin  Pb2+  colorimetric sensor  adsorption
Author NameAffiliationPostcode
LIU Yanhua Puyang Medical College， Puyang， He’nan Province， 457000 457000
XU Baosong Puyang Agriculture and Rural Bureau， Puyang， He’nan Province， 457000 457000
YANG Jiachuan Shanxi Datong University， Datong， Shanxi Province， 037009 037009
SONG Zehua* Puyang Agriculture and Rural Bureau， Puyang， He’nan Province， 457000 457000
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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.
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