Abstract
In this paper, single wall carbon nanotube (SWCNT) suspensions were added dropwise to silica particles before volatising the solvent to prepare a core-shell composite adsorbent with SWCNTs wrapped around silica particles (SWCNTsSilica). The composite adsorbent was used as packing for the solid phase extraction (SPE) and the enrichment of organophosphorus pesticides (OPPs) in water. The results indicate the SWCNTs entirely wrap the silica particle surfaces to form SWCNT shells. This preparation method is simpler and more efficient than existing methods. SWCNTsSilica composite materials can reduce the number of SWCNTs required and improve their utilization. The extraction capacity for OOPs in water was higher than for C but below HLB. The developed SPE-GC-FPD method exhibited a limit of detection (LOD) and limit of quantitation (LOQ) of 0.593~1.759 μg/L and 1.95~5.80 μg/L, respectively and satisfactorily measured Jiulong river and farmland water samples.
Highlights
The broad usage of organophosphorus pesticides (OPPs) results in their appearance in environmental waters
The above process was repeated until all 10 mL of the suspension was consumed to obtain the single wall carbon nanotube (SWCNT)@Silica
A silica column under a 20 Kpa negative pressure was used as control group to examine the prepared SWCNTs@Silica minicolumn flow speeds
Summary
The broad usage of organophosphorus pesticides (OPPs) results in their appearance in environmental waters. Numerous reports have used carbon nanotubes (CNTs), which demonstrate excellent adsorption properties [8,9,10,11], as SPE packing to extract OPPS in water. These studies all use pure CNTs as the packing and consumed a large amount of material (100-200 mg) with low utilization, and the minicolumn exhibited significant resistance with a low flow velocity. Composite adsorbents prepared from CNTs and other inorganic or organic carriers via wrapping, embedding and grafting can resolve these issues to some extent These preparation methods are extremely complicated [12,13,14,15,16,17]. This paper leveraged the self-polymerization of SWCNTs at high
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
