title: Preparation of a magnetic porous carbon with hierarchical structures from waste biomass for the extraction of some carbamates.
abstract: In this study, corn stalk was used to synthesize a magnetic adsorbent by pyrolysis together with KHCO3as the chemical activator and iron(III) salt as the magnetic reagent. The characterization by scanning electron microscopy, transmission electron microscopy and N2adsorption-desorption analysis showed that the magnetic carbon adsorbent had a structure of hierarchical pores with a high specific surface area. To evaluate its adsorption performance, the adsorbent was used for the extraction of carbamates pesticides (propoxur, isoprocarb and fenobucarb) from water and zucchini samples before high-performance liquid chromatography analysis. The result showed that the adsorbent had a good adsorption capability for the analytes. Under the optimized conditions, a good linearity for the analytes existed in the range of 0.1-100.0 ng/mL for water samples and 0.5-100.0 ng/g for zucchini samples with the correlation coefficients of 0.9992-0.9998. The limits of detection for the analytes at a signal to noise ratio of 3 were 0.03 ng/mL for water samples and 0.20-0.50 ng/g for zucchini samples.
authors.affiliation: College of Science, Hebei Agricultural University, Baoding, Hebei, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Science, Hebei Agricultural University, Baoding, Hebei, China.
authors.forename: Ruiyang
authors.initials: R
authors.lastname: Ma
authors.affiliation: College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai, China.
authors.forename: Ruobai
authors.initials: R
authors.lastname: Xiao
authors.affiliation: College of Science, Hebei Agricultural University, Baoding, Hebei, China.
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Wu
authors.affiliation: College of Science, Hebei Agricultural University, Baoding, Hebei, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Science, Hebei Agricultural University, Baoding, Hebei, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D018533:Biomass; D002219:Carbamates / Q000302:isolation & purification*; D002244:Carbon; D002851:Chromatography, High Pressure Liquid; D005290:Ferric Compounds; D010575:Pesticides / Q000302:isolation & purification*; D052616:Solid Phase Extraction; D014675:Vegetables / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D002219:Carbamates; D005290:Ferric Compounds; D010575:Pesticides; D014874:Water Pollutants, Chemical; D002244:Carbon
keywords: biomass; carbamates; high-performance liquid chromatography; magnetic solid-phase extraction; porous carbon