A5054025799- Nanoparticles: synthesis and applications
- Heavy metals in environment
- Graphene and Nanomaterials Applications
- Soil and Water Nutrient Dynamics
- Soil Carbon and Nitrogen Dynamics
- Laser-Ablation Synthesis of Nanoparticles
- Toxic Organic Pollutants Impact
- Per- and polyfluoroalkyl substances research
- Constructed Wetlands for Wastewater Treatment
- Heavy Metal Exposure and Toxicity
- Phosphorus and nutrient management
- Geochemistry and Elemental Analysis
- Microplastics and Plastic Pollution
- Pesticide and Herbicide Environmental Studies
- Atmospheric chemistry and aerosols
- Microbial Community Ecology and Physiology
- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
- Powdery Mildew Fungal Diseases
- Antibiotics Pharmacokinetics and Efficacy
- Drug-Induced Hepatotoxicity and Protection
- Nanocomposite Films for Food Packaging
- Polymer-Based Agricultural Enhancements
- Environmental DNA in Biodiversity Studies
- Soil Geostatistics and Mapping
University of Florida
2017-2024
CSIRO Land and Water
2015-2020
Commonwealth Scientific and Industrial Research Organisation
2020
University of Kentucky
2010-2019
Duke University
2012-2015
California Pacific Medical Center
2012
Chemical transformations of silver nanoparticles (Ag NPs) and zinc oxide (ZnO during wastewater treatment sludge must be characterized to accurately assess the risks that these nanomaterials pose from land application biosolids. Here, X-ray absorption spectroscopy (XAS) supporting characterization methods are used determine chemical speciation Ag Zn in a pilot plant (WWTP) had received PVP coated 50 nm NPs 30 ZnO NPs, dissolved metal ions, or no added metal. The effects composting lime heat...
Nanoparticles from the rapidly increasing number of consumer products that contain manufactured nanomaterials are being discharged into waste streams. Increasing evidence suggests several classes may accumulate in sludge derived wastewater treatment and ultimately soil following land application as biosolids. Little research has been conducted to evaluate impact nanoparticles on terrestrial ecosystems, despite fact biosolids will be a major pathway for introduction environment. To begin...
We used the model organisms Nicotiana tabacum L. cv Xanthi (tobacco) and Triticum aestivum (wheat) to investigate plant uptake of 10-, 30-, 50-nm diameter Au manufactured nanomaterials (MNMs) coated with either tannate (T-MNMs) or citrate (C-MNMs). Primary particle size, hydrodynamic zeta potential were characterized using transmission electron microscopy (TEM), dynamic light scattering (DLS), electrophoretic mobility measurements, respectively. Plants exposed NPs hydroponically for 3 7 days...
To investigate the role of particle size on oxidation, bioavailability, and adverse effects manufactured Cu nanoparticles (NPs) in soils, we exposed earthworm Eisenia ferida to a series concentrations commercially produced NPs labeled as 20- 40-nm or < 100-nm artificial soil media. Effects growth, mortality, reproduction, expression variety genes associated with metal homeostasis, general stress, oxidative stress were measured. We also used X-ray absorption spectroscopy scanning fluorescence...
Nanotechnology is currently contributing substantially to the development of a broad range innovative technologies in agricultural, feed and food sector. To date, very little work has been done investigate efficacy antimicrobial nanoparticles against pathogens highest concern poultry industry. This study first report on effectiveness CuO Salmonella Ag Campylobacter. The aim this was assess vitro activity silver (Ag), zinc oxide (ZnO) copper (CuO) Campylobacter isolated from poultry. minimum...
We examined the effects of amending soil with biosolids produced from a pilot-scale wastewater treatment plant containing mixture metal-based engineered nanomaterials (ENMs) on growth Medicago truncatula, its symbiosis Sinorhizobium meliloti, and microbial community structure. Treatments consisted soils amended generated (1) Ag, ZnO, TiO2 ENMs introduced into influent (ENM biosolids), (2) AgNO3, Zn(SO4)2, micron-sized (dissolved/bulk metal biosolids) stream, or (3) no added to (control)....
Environmental contextNano-enabled agriculture holds the promise of enhancing crop production while reducing environmental impacts agrochemicals. We review recent developments in use nano-fertilisers, nano-additives, nano-pesticides, nano-sensors, nano-cleansers and nano-delivery systems agriculture. The highlights need for systematic studies on nanotoxicity development cost-effective eco-friendly nanomaterials future applications. AbstractTo keep pace with ever-increasing demand world...
In order to properly evaluate the ecological and human health risks of ZnO manufactured nanomaterials (MNMs) released environment, it is critical understand likely transformation products in various environments, such as soils, surface ground waters, wastewater treatment processes. To address this knowledge gap, we examined 30 nm MNMs presence different concentrations phosphate a function time pH using variety orthogonal analytical techniques. The data reveal that react with at transform...
We investigated the potential for bioaccumulation of engineered nanomaterials (ENMs) by tobacco hornworm (Manduca sexta) caterpillars resulting from ingestion plant tissue surface contaminated with ENMs. Caterpillars were fed tomato leaf that had been 12 nm tannate coated Au After dosing was complete, bulk concentrations in individual measured after 0, 1, 4, and 7 days elimination. Growth, mortality, rate monitored. This experiment revealed (1) no evidence affected ENM tissue; (2) low...
Toxicogenomic responses in Medicago truncatula A17 were monitored following exposure to biosolids-amended soils. Treatments included biosolids produced using a pilot wastewater treatment plant with either no metal introduced into the influent (control); bulk/ionic TiO2, ZnO, and AgNO3 added (bulk/dissolved treatment); or Ag, TiO2 engineered nanomaterials (ENM treatment) then soil, which was aged field for 6 months. In our companion study, we found inhibition of nodulation ENM but not...
Manufactured nanoparticles (NPs) are increasingly being used for commercial purposes and certain NP types have been shown to broad spectrum antibacterial activity. In contrast, their activities against fungi fungi-like oomycetes less studied. Here, we examined the potential of two commercially available Zn NPs (Zn ZnO NPs) inhibit spore germination infectivity on tobacco leaves resulting from exposure oomycete pathogen Peronospora tabacina (P. tabacina). Both NPs, as well ZnCl₂ bulk control...
The environmental fate and potential impacts of nanopesticides on agroecosystems under realistic agricultural conditions are poorly understood. As a result, the benefits risks these novel formulations compared to conventional products currently unclear. Here, we examined effects repeated exposures Cu(OH)2 nanopesticide, Kocide 3000, simulated pastureland in an outdoor mesocosm experiment over 1 year. applications were performed alongside three different mineral fertilization levels (Ambient,...
Chronic exposure to environmental contaminants can induce heritable "transgenerational" modifications organisms, potentially affecting future ecosystem health and functionality. Incorporating transgenerational epigenetic heritability into risk assessment procedures has been previously suggested. However, a critical review of existing literature yielded numerous studies claiming impacts, with little compelling evidence. Therefore, contaminant-induced inheritance may be less common than is...
Soils provide critical support essential for life on earth, regulate processes across diverse terrestrial and aquatic ecosystems, interact with the atmosphere. However, soil science is constrained by a variety of challenges including decreasing funding prospects declining number new students young professionals. Hence, there crucial need to revitalize impact, relevance, recognition as well promote collaboration beyond traditionally defined research disciplines. Such revitalization may be...
Medicinal and food crops including hemp ( Cannabis sativa L.) are routinely tested for heavy metal (HM) contaminants As, Cd, Pb per regulatory guidelines. Heavy metals have been found in greenhouse substrates, peat coconut coir, commonly used production, which underscores the need to evaluate risk of HM contamination from these production inputs. The objective was quantify uptake coir substrate into shoot tissue using bioassays compare between brassicas hemp. In Expt. 1, ‘Maverick’ grown 8...