A5078534022- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Pesticide and Herbicide Environmental Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Microbial Community Ecology and Physiology
- Nanoparticles: synthesis and applications
- Wastewater Treatment and Nitrogen Removal
- Heavy metals in environment
- Microbial bioremediation and biosurfactants
- Turfgrass Adaptation and Management
- Graphene and Nanomaterials Applications
- Legume Nitrogen Fixing Symbiosis
- Environmental Toxicology and Ecotoxicology
- Plant Disease Management Techniques
- Soil erosion and sediment transport
- Fullerene Chemistry and Applications
- Water Quality and Resources Studies
- Weed Control and Herbicide Applications
- Chromium effects and bioremediation
- Hydrology and Watershed Management Studies
- Plant Pathogens and Fungal Diseases
- Fecal contamination and water quality
- Toxic Organic Pollutants Impact
- Water Quality Monitoring Technologies
- Radioactive element chemistry and processing
Purdue University West Lafayette
2013-2023
State Street (United States)
2004-2022
Centro di Ricerca per l’Orticoltura
2017-2020
Centro de Recursos Educativos Avanzados
2017
Institute for Agricultural and Forest Systems in the Mediterranean
2017
Istituto per il Sistema Produzione Animale in Ambiente Mediterraneo
2017
Forestry Research Centre
2017
Purdue University System
2014
Agricultural Research Service
1989-2004
University of Wisconsin–Madison
1989
Abstract Spatial distributions of soil properties at the field and watershed scale may affect yield potential, hydrologic responses, transport herbicides NO − 3 to surface or groundwater. Our research describes field‐scale spatial trends for 28 different parameters two sites within a in central Iowa. Two 27 measured one site 10 14 second were normally distributed. variability was investigated using semivariograms ratio nugget total semivariance, expressed as percentage, used classify...
The nascent state of the nanoproduct industry calls for important early assessment environmental impacts before significant releases have occurred. Clearly, impact manufactured nanomaterials on key soil processes must be addressed so that an unbiased discussion concerning consequences nanotechnology can take place. In this study, soils were treated with either 1 μg C60 g-1 in aqueous suspension (nC60) or 1000 granular form, a control containing equivalent tetrahydrofuran residues as...
Engineered nanomaterials (ENMs) are increasingly entering the environment with uncertain consequences including potential ecological effects.Various research communities view differently whether ecotoxicological testing of ENMs should be conducted using environmentally relevant concentrations-where observing outcomes is difficult-versus higher ENM doses, where responses observable.What exposure conditions typically used in assessing hazards to populations?What test ecosystem-scale...
Abstract Leaching of agrichemicals into subsurface tile drainage water is a concern for quality. The objective this 3‐yr study was to determine field‐scale pesticide and nitrate (NO 3 ) losses instrumented drains as affected by drain spacing (5, 10, 20 m). Small amounts carbofuran [2,3‐dihydro‐2,2‐dimethyl‐7‐benzofuranyl‐methylcarbamate]; atrazine [2‐chloro‐4‐(ethylamino)‐6‐(isopropylamino)‐ s ‐triazine]; cyanazine [2‐chloro‐4‐(1‐cyano‐1‐methyl‐ethyl‐amino)‐6‐ethylamino‐ alachlor...
The microbial transformation of 8:2 fluorotelomer alcohol (FTOH) to perfluorocarboxylic acids, including the globally detected perfluorooctanoic acid (PFOA), has recently been confirmed occur in mixed bacteria cultures, activated sludge, and soil. However, little is known date about microbes involved transformation. In present study, effect three carrier solvents (ethanol, octanol, 1,4-dioxane), which may serve as carbon sources, on aerobic degradation rate FTOH metabolite distribution was...
Microbial community diversity, potential microbial activity, and metal resistance were determined in three soils whose lead contents ranged from 0.00039 to 48 mmol of Pb kg soil-1. Biomass levels directly related content. A molecular analysis 16S rRNAs suggested that each soil contained a complex, diverse community. statistical the phospholipid fatty acids indicated having highest content was not communities other soils. All active populations mineralized [14C]glucose. In all samples, 10 15%...
Microbial community composition and activity were characterized in soil contaminated with lead (Pb), chromium (Cr), hydrocarbons. Contaminant levels very heterogeneous ranged from 50 to 16,700 mg of total petroleum hydrocarbons (TPH) kg soil(-1), 3 3,300 Cr 1 17,100 Pb soil(-1). compositions estimated the patterns phospholipid fatty acids (PLFA); these considerably different among 14 samples. Statistical analyses suggested that variation PLFA was more correlated than Pb. The metal...
As the technological benefits of nanotechnology begin to rapidly move from laboratory large-scale industrial application, release nanomaterials environment is inevitable. Little known about fate and effects in nature. Major environmental receptors will be soil, sediment, biosolids wastewater treatment. Analysis anaerobic microbial activity communities provides needed information nanoparticles certain environments. In this study, treatment sludge were exposed fullerene (C60) order model an...
The microbial processes that occur in the subsurface under a typical Midwest agricultural soil were studied. A 26-m bore was installed November of 1988 at site Purdue University Agronomy Research Center. Aseptic collections materials made 17 different depths. Physical analysis indicated contained up to 14 strata. primarily glacial tills with high carbonate content. N, P, and organic C contents sediments tended decrease depth. Ambient water content generally less than content, which...
The North Central Education and Research Activity Committee (NCERA-59) was formed in 1952 to address how soil organic matter formation management practices affect structure productivity. It is this capacity that we comment on the science supporting quality associated health assessment for agricultural lands with goal of hastening progress important field. Even though suite indicators being applied by U.S. efforts closely mirrors 'minimum data set' developed recommended mid-1990s, question...
The use of single-wall carbon nanotubes (SWNTs) in manufacturing and biomedical applications is increasing at a rapid rate; however data on the effects potential environmental release materials remain sparse. In this study, soils with either low or high organic matter contents as well pure cultures E. coli are challenged raw as-produced SWNTs (AP-SWNTs) functionalized polyethyleneglycol (PEG-SWNTs) m-polyaminobenzene sulfonic acid (PABS-SWNTs). To mimic chronic exposure, soil systems were...