Mosquitocidal and photo-dye degradation potential of mangrove derived nano-composites: An ecofriendly approach

Abstract

Currently, the importance of eco-friendly and economical biogenesis of nanomaterials has increased. In this research, copper oxide nanoparticle (CuONPs) from Sonneratia alba as well carbon quantum dots (CQDs) from Sonneratia caseolaris were produced in the fight against different life stages of filarial vector, Cx. quinquefasciatus (Say) in dose-dependent manner. Also, both nanomaterials were tested for methyl orange dye reduction from waste water in different time intervals. The obtained highly stable nanomaterials from both mangrove plants were confirmed by UV–vis spectroscopy, SEM, XRD and FTIR techniques and S.alba derived CuONPs were mostly mono-disperse in shape, with an average size around 36.26 nm, while CQDs from S. caseolaris were spherical in shape with mean size of 8.8 nm.. In mosquitocidal assay, both S.alba derived CuONPs and CQDs from S. caseolaris exhibited significant toxicity on different life stages of Cx. quinquefasciatus, notably with LC50 values of CuONPs ranging from 172.980 (I instar) to 530.362 ppm (pupae), while CQDs shows in the range of LC50 from 625.412 (I instar) to 1.020 ppm (pupae), respectively. Moreover, it was noticed that the reduction of methyl orange (MO) by mangrove derived nanomaterials (CuONPs and CQDs) and the percentage of dye removal was 15.41 % (30 min), 28.67 % (60 min), 34.05 % (90 min), and 40.14 % (150 min) for CuONPs, whereas for CQDs the rate of reduction was 11.6 %, 21.63 %, 39.57 %, 60.6 % and 82.32 % on MO contaminated water. Overall, the mangrove derived nano-composites could be significant achievement in the fight against filarial vector Cx. quinquefasciatus and MO dye reduction from waste water.