FB 02 UFT - Centre for Environmental Research and Sustainable Technology, General and Theoretical Ecology, University of Bremen, Leobener Str. 6, 28359 Bremen, Germany.
Published: August 2023
AI Article Synopsis
Article Abstract
Transformation, dissolution, and sorption of copper oxide nanoparticles (CuO-NP) play an important role in freshwater ecosystems. We present the first mesocosm experiment on the fate of CuO-NP and the dynamics of the zooplankton community over a period of 12 months. Increasingly low (0.08-0.28 mg Cu L) and high (0.99-2.99 mg Cu L) concentrations of CuO-NP and CuSO (0.10-0.34 mg Cu L) were tested in a multiple dosing scenario. At the high applied concentration (CuO-NP_H) CuO-NP aggregated and sank onto the sediment layer, where we recovered 63% of Cu applied. For the low concentration (CuO-NP_L) only 41% of applied copper could be recovered in the sediment. In the water column, the percentage of initially applied Cu recovered was on average 3-fold higher for CuO-NP_L than for CuO-NP_H. Zooplankton abundance was substantially compromised in the treatments CuSO ( < 0.001) and CuO-NP_L ( < 0.001). Community analysis indicated that Cladocera were most affected (b = -0.49), followed by Nematocera (b = -0.32). The abundance of Cladocera over time and of Dixidae in summer was significantly reduced in the treatment CuO-NP_L ( < 0.001; < 0.05) compared to the Control. Our results indicate a higher potential for negative impacts on the freshwater community when lower concentrations of CuO-NP (<0.1 mg Cu L) enter the ecosystem.
Copper oxide nanoparticles (CuO NP) were incorporated into a hydroxypropyl cellulose (HPMC) and sodium alginate (NaAlg) matrix through a casting method to create bio-nanocomposite films. XRD analysis confirmed the semi-crystalline nature of the HPMC/NaAlg matrix, with a broad peak at 2θ = 21.22°, which decreased in intensity as CuO concentration increased, indicating a shift towards an amorphous structure.
In this study, the characteristics of diesel engines were tested with in-house produced mahua biodiesel blended with diesel and copper oxide nanoparticles (CuO NP) catalyst. The preliminary investigation used mahua biodiesel-diesel blends (M10, M20, and M30) among them M20 outperformed. Further M20 and CuO NP with concentrations of 25, 50, and 75 ppm are studied.
The speedy growth of copper oxide nanoparticle (CuO NP) manufacturing due to their wide application in industries has caused concerns due to their increased discharge into the environment from both purposeful and accidental sources. Their presence at an elevated concentration in the environment can cause potential hazards to the plant kingdom, specifically to staple food crops. However, limited research is available to determine the consequences of CuO NPs.
The study explores environmentally friendly methods for synthesizing copper oxide nanoparticles (CuO NPs) using plant extracts from Azadirachta indica and Simmondsia chinensis.
CuO NPs were confirmed through color change and UV-visible spectroscopy, showing antibacterial properties against various clinical bacteria, including MRSA, with effective concentrations ranging from 62.5 to 125 µg/ml.
The findings suggest CuO NPs as potential alternative antibiotics and support their application in the pharmaceutical and healthcare sectors globally.
Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Science, South China Normal University, Guangzhou, 510631, China.
* Lettuce exposed to varying concentrations of CuO-NPs showed significant copper accumulation and notable changes in metabolite profiles, including increased phenolic acids and decreased flavonoids, indicating stress responses.
* Key metabolites related to energy and carbohydrate metabolism were enhanced, while others linked to stress resistance were reduced at high CuO-NP concentrations, signaling potential negative effects on plant growth and health.
