Distribution of permethrin on laminated bamboo after the preservative treatment using SC-CO₂ as a carrier solvent

Abstract

This study was conducted to determine the presence of the insecticide permethrin and its retention gradients within the structure of laminated bamboo after treatment using supercritical carbon dioxide (SC-CO2) as the carrier solvent. the presence of permetrin was based on functional group differences indicated by FT-IR analyses before and after the preservative treatment. Permethrin retentions in the treated bamboo materials ranged from 0.0020 to 0.0022%. This result indicated that the preservative treatment of laminated bamboo using SC-CO2 as a carrier solvent produced evenly distributed chemical an effective level. There was no signicant distribution gradient of the preservative observed over the layers of the treated laminated bamboo arranged with outer-inner surface laminations. The current treatment condition is potential to produce laminated bamboo products completely resistant to biodegradation.

Synergistic impact of nanoplastics and nanopesticides on Artemia salina and toxicity analysis

“…FTIR spectra of NPER had sharp characteristic peaks of nanopermethrin C O stretching vibration of carbonyl groups at 1724 cm −1 , asymmetric stretching of C–O–C at 1283 cm −1 , C–Cl stretch at 816 cm −1 and C–H bend at 690 cm −1 , 42 and similar significant permethrin peaks are reported in ref. 43 . In the complex, significant peaks have exhibited some shift in the (C–H) bend at 670 cm −1 , at 810 cm −1 (C–Cl stretch), asymmetric stretching of C–O–C at 1283 cm −1 and C O groups at 1214 cm −1 The results demonstrate that NPER interacts with PSNPs in Milli-Q water and sea water and the adsorption of the complex shown the major nanopermethrin peak on the surface of the PSNPs and a peak shift is demonstrated as shown in Fig.…”