Recyclable nitrogen-containing chitin-derived carbon microsphere as sorbent for neonicotinoid residues adsorption and analysis.

Affiliation

Cheng Q(1), Huang M(1), Xiao A(1), Xu Z(1), Chen X(2), Gao Y(1), Yu G(3).
Author information:
(1)Guangdong Biomaterials Engineering Technology Research Center, Institute of Bioengineering, Guangdong Academy of Science, Guangzhou, 510316, China; Research Center for Sugarcane Industry Engineering Technology of Light Industry of China, Guangzhou, 510316, China.
(2)Guangdong Biomaterials Engineering Technology Research Center, Institute of Bioengineering, Guangdong Academy of Science, Guangzhou, 510316, China; Research Center for Sugarcane Industry Engineering Technology of Light Industry of China, Guangzhou, 510316, China. Electronic address: [Email]
(3)Guangdong Biomaterials Engineering Technology Research Center, Institute of Bioengineering, Guangdong Academy of Science, Guangzhou, 510316, China; Research Center for Sugarcane Industry Engineering Technology of Light Industry of China, Guangzhou, 510316, China. Electronic address: [Email]

Abstract

Chitin-derived three-dimensional nanomaterials has tremendous potential in pesticide residue analysis as an attractive green substitute for toxic solvents. The work presented herein focuses on constructing the environmentally friendly nitrogen-containing chitin-derived carbon microspheres (N-CCMP) for the efficient adsorption of neonicotinoid pesticides (NPs) including acetamiprid, clothianidin, imidacloprid and thiamethoxam. The N-CCMP displayed hierarchical porous structure, uniform size distribution, and excellent specific surface area of 680.8 m2  g-1. The N-CCMP with N-heterocyclic ring structure and surface oxygen functional groups exhibited good affinity to NPs, which was beneficial for the rapid adsorption. Then, the N-CCMP were utilized as sorbent in extraction of NP residues. Under the optimum conditions, the relative recoveries in water and juice sample were in the range of 85 %-116 % and 74 %-108 %, with relative standard deviations (RSDs) of 0.1 %∼5.2 % and 0.7 %∼5.2 %, respectively. The extraction performance of N-CCMP were still over 80 % after 5 times of reuse.