Understanding effect of solution chemistry on heteroaggregation of zinc oxide and copper oxide nanoparticles

Parsai, Tanushree; Kumar, Arun

doi:10.1016/j.chemosphere.2019.06.171

Cited by 39 publications

(18 citation statements)

References 36 publications

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“…The greatest absorption of this element could have been due to copper, which is captured better by the passive apoplast membrane of the so-called transport proteins (Aguirre-Bolaños et al, 2017;Ruddaraju et al, 2020), since they are incorporated to metabolic pathways, such as plant copper enzymes altering the mitogen-activated protein kinase (El Shafey, 2020). Thus, these proteins participate in signaling the transduction induced by heavy metals (Hu and Gao, 2010) and protein phosphorylation, which are important in the enzymatic activity center (Parsai and Kumar, 2019) and a greater effect in antioxidant activity (Rajput et al, 2020). Similar results have been reported, finding increase in Cu content because of adding CuONPs.…”

Section: Concentration Of Copper In Wheat Sproutssupporting

confidence: 76%

Copper oxide nanoparticles biosynthetized improve germination and bioactive compounds in wheat sprouts

Ortega-Ortíz¹,

Gaucin-Delgado

Preciado-Rangel

et al. 2022

Not Bot Horti Agrobo

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Metal nanoparticles have many positive effects in improving crop production and productivity and allow for increased germination and rapid crop establishment under field conditions. The metallic nanoparticles applied in this study were copper oxide nanoparticles (CuONPs) biosynthesized using orange peel (Citrus X sinensis) as a reducing agent to avoid or reduce toxicity in wheat seeds and sprouts. This study determined the effect of CuONPs on germination, radicle and plumule length, as well as the production of phytochemical compounds in wheat sprouts. The seeds were treated with suspensions of CuONPs at the following concentrations: 0, 0.5, 1, 2, 4 and 6 mg mL-1. The results indicate that the use of low doses of CuONPs (0.5 mg mL-1), improved germination, vigor, plumule and radicle length, in addition to increasing the biosynthesis of phytochemical compounds in wheat shoots. A high concentration of CuONPs (6 mg mL-1) causes inhibitory effects due to Cu accumulation and phytotoxicity in plant tissue. The use of CuONPs for green synthesis is a viable alternative to obtain beneficial effects in germination and seedling development, as well as greater secondary metabolite production.

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Section: Concentration Of Copper In Wheat Sproutssupporting

confidence: 76%

Copper oxide nanoparticles biosynthetized improve germination and bioactive compounds in wheat sprouts

Ortega-Ortíz¹,

Gaucin-Delgado

Preciado-Rangel

et al. 2022

Not Bot Horti Agrobo

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“…47 Furthermore, the stability of suspensions containing a mixture of nCuO and nZnO was found to decrease with increasing pH, ionic strength, and ENP concentration. 47 Another study showed that aggregation in a suspension containing a mixture of nCuO and nZnO in natural water was significantly affected by the ENP concentration, clay concentration, and humic acid. 63 It is known that abiotic field conditions, such as UV exposure, 64 pH, 65 ionic strength, 66 and natural organic matter (NOM), 65,67 can influence how ENPs affect different organisms.…”

Section: Types and Trophicmentioning

confidence: 97%

Review and Prospects on the Ecotoxicity of Mixtures of Nanoparticles and Hybrid Nanomaterials

Zhang

Wang

Peijnenburg

et al. 2022

Environ. Sci. Technol.

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The rapid development of nanomaterials (NMs) and the emergence of new multicomponent NMs will inevitably lead to simultaneous exposure of organisms to multiple engineered nanoparticles (ENPs) at varying exposure levels. Understanding the joint impacts of multiple ENPs and predicting the toxicity of mixtures of ENPs are therefore evidently of importance. We reviewed the toxicity of mixtures of ENPs to a variety of different species, covering algae, bacteria, daphnia, fish, fungi, insects, and plants. Most studies used the independent-action (IA)-based model to assess the type of joint effects. Using co-occurrence networks, it was revealed that 53% of the cases with specific joint response showed antagonistic, 25% synergistic, and 22% additive effects. The combination of nCuO and nZnO exhibited the strongest interactions in each type of joint interaction. Compared with other species, plants exposed to multiple ENPs were more likely to experience antagonistic effects. The main factors influencing the joint response type of the mixtures were (1) the chemical composition of individual components in mixtures, (2) the stability of suspensions of mixed ENPs, (3) the type and trophic level of the individual organisms tested, (4) the biological level of organization (population, communities, ecosystems), (5) the exposure concentrations and time, (6) the endpoint of toxicity, and (7) the abiotic field conditions (e.g., pH, ionic strength, natural organic matter). This knowledge is critical in developing efficient strategies for the assessment of the hazards induced by combined exposure to multiple ENPs in complex environments. In addition, this knowledge of the joint effects of multiple ENPs assists in the effective prediction of hybrid NMs.

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“…The research on the aggregation of particles in the nano and micrometer size range is relevant in numerous processes, such as in the production of chemical materials and medicine, in environmental protection, and so forth 1 – 4 . The main factors affecting the aggregation of particles: pH 4 – 7 , solution temperature 7 , ionic strength 8 , 9 , long-range van der Waals forces 10 , gravity 11 , 12 , electrolyte concentration 12 , and electrolyte type 13 , particle size, the surface charge density of particles, etc. The researches showed that the surface charges of particles is mainly divided into variable and permanent surface charge 5 .…”

Section: Introductionmentioning

confidence: 99%

Aggregation modeling of the influence of pH on the aggregation of variably charged nanoparticles

Xiong

Liu

Xiong

2021

Sci Rep

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The aggregation of variably charged nanoparticles is usually induced by the changes in internal and external conditions, such as solution temperature, pH, particle size, van der Waals force, and electrostatic repulsion among particles. In order to explore the effect of pH on the aggregation of variable charge nanoparticles, this paper proposed an extended model based on the 3D on-lattice Cluster–Cluster Aggregation (CCA) model. The extended model successfully established the relationship between pH and sticking probability, and used Smoluchowski theory to calculate the aggregation rate of nanoparticles. The simulation results showed that: (1) the change of the aggregation rate of the variable charge nanoparticles with pH conforms to the Gaussian distribution, (2) the initial particle concentration has a significant effect on the aggregation rate of the nanoparticles, and (3) pH can affect the competition between van der Waals force and electrostatic repulsion between particles, thereby affecting the degree of openness of clusters. The research demonstrated the extended CCA model is valuable in studying the aggregation of the variably charged nanoparticles via transforming the corresponding influence factors into the influence on the sticking probability.

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Understanding effect of solution chemistry on heteroaggregation of zinc oxide and copper oxide nanoparticles

Cited by 39 publications

References 36 publications

Copper oxide nanoparticles biosynthetized improve germination and bioactive compounds in wheat sprouts

Copper oxide nanoparticles biosynthetized improve germination and bioactive compounds in wheat sprouts

Review and Prospects on the Ecotoxicity of Mixtures of Nanoparticles and Hybrid Nanomaterials

Aggregation modeling of the influence of pH on the aggregation of variably charged nanoparticles

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