A5061704344- Heavy metals in environment
- Soil Carbon and Nitrogen Dynamics
- Heavy Metal Exposure and Toxicity
- Clay minerals and soil interactions
- Phosphorus and nutrient management
- Arsenic contamination and mitigation
- Mine drainage and remediation techniques
- Soil and Water Nutrient Dynamics
- Geochemistry and Elemental Analysis
- Environmental Justice and Health Disparities
- Selenium in Biological Systems
- Coal and Its By-products
- Constructed Wetlands for Wastewater Treatment
- Geochemistry and Geologic Mapping
- Iron oxide chemistry and applications
- Wastewater Treatment and Reuse
- Chromium effects and bioremediation
- Mercury impact and mitigation studies
- Urban Agriculture and Sustainability
- Plant Micronutrient Interactions and Effects
- Radioactivity and Radon Measurements
- Bioenergy crop production and management
- Plant Stress Responses and Tolerance
- Radioactive element chemistry and processing
- Soil and Unsaturated Flow
Kansas State University
2016-2025
The University of Adelaide
2006-2023
Arkansas Agricultural Experiment Station
1997-2019
Commonwealth Scientific and Industrial Research Organisation
2012
CSIRO Land and Water
2008-2011
Environmental Protection Agency
2001-2008
Sabancı Üniversitesi
2008
University of Peradeniya
2003-2004
Ohio Environmental Protection Agency
2003
The solubility of Zn in fertilizers plays an important role the agronomic effectiveness fertilizer. On basis thermodynamics, zinc oxide (ZnO) nanoparticles (NPs) should dissolve faster and to a greater extent than bulk ZnO particles (equivalent spherical diameter >100 nm). These novel features NPs might be exploited improve efficiency fertilizers. In this study, we compared dissolution kinetics coated onto two selected granular macronutrient fertilizers, urea monoammonium phosphate (MAP)....
In addition to the formation of insoluble lead (Pb) compounds, adsorption is another potentially important process controlling bioavailability Pb in soils. Less attention has been given manganese (Mn) oxides, even though they are known adsorb more strongly than any other metal (hydr)oxides. This study was conducted evaluate effects P and Mn oxide on bioavailable five metal-contaminated soils or mine spoils from Kansas Missouri. Cryptomelane used as representative oxide. Nine treatments were...
ABSTRACT In situ stabilization of Pb‐contaminated soils can be accomplished by adding phosphorus. The standard remediation procedure soil removal and replacement currently used in residential areas is costly disruptive. This study was carried out to evaluate the influence P other amendments on five metal‐contaminated mine wastes. Seven treatments were used: unamended control; 2500 mg P/kg as triple superphosphate (TSP), phosphate rock (PR), acetic acid followed TSP, phosphoric (PA); 5000 TSP...
Zinc oxide (ZnO) nanoparticles may provide a more soluble and plant available source of Zn in fertilizers due to their greater reactivity compared equivalent micron- or millimetre-sized (bulk) particles. However, the effect soil on solubility, spatial distribution speciation ZnO has not yet been investigated. In this study, we examined diffusion solid phase an alkaline calcareous following application nanoparticulate bulk coated fertilizer products (monoammonium phosphate (MAP) urea) using...
Lead (Pb) is one of the most common contaminants in urban soils. Gardening contaminated soils can result Pb transfer from soil to humans through vegetable consumption and unintentional direct ingestion. A field experiment was conducted 2009 2010 a community garden with total concentration 60 300 mg kg. The objectives this study were evaluate soil-plant Pb, effects incorporation leaf compost as means reducing concentrations vegetables bioaccessibility cleaning techniques on edible portions...
Management and destruction of obsolete pesticides the remediation pesticide-contaminated soil are significant global issues with importance in agriculture, environmental health quality life. Pesticide use management have a history problems because insufficient knowledge proper planning, storage, use. This manuscript reviews recent literature an emphasis on soil. The rhizosphere plants is zone active remediation. Plants also take up contaminated water remove from beneficial effects growing...
Recently the Centers for Disease Control and Prevention lowered blood Pb reference value to 5 μg/dL. The lower combined with increased repurposing of postindustrial lands are heightening concerns driving interest in reducing soil exposures. As a result, regulatory decision makers may residential screening levels (SSLs), used setting cleanup levels, that be difficult achieve, especially urban areas. This paper discusses challenges remediation bioavailability assessments soils context SSLs...
This study examined the effects of applied selenium (Se) species, time application, method and soil water management regimen on accumulation Se in rice plants. Plants were grown to maturity a temperature- humidity-controlled growth chamber using three methods: field capacity (FC), submerged until harvest, drained 2 weeks before harvest. Two selenate (SeO42–) selenite (SeO32–), at rate equivalent 30 g ha–1. Four application methods employed as follows: (i) preparation, (ii) Se-enriched urea...
ABSTRACT To evaluate the importance of both inorganic and organic fractions in biosolids on Cd chemistry, a series sorption desorption batch experiments (at pH 5.5) were conducted different soils from long‐term field experimental site. The slope isotherm increased with rate was for biosolids. Removal carbon (OC) reduced but did not account observed differences between biosolids‐amended control soil, indicating that adsorption associated application limited to OC addition Fe/Mn further slopes...
Elevated levels of lead (Pb) and arsenic (As) are not uncommon for urban soils. Test plots were established at gardens in Tacoma Seattle, WA. The site was contaminated with Pb (51-312 mg kg) As (39-146 kg), the Seattle had high soil concentrations ranging from 506 to 2022 kg <20 kg. efficacy biosolids mix compost amendment reducing three vegetables (carrots, lettuce, tomatoes) bioaccessibility evaluated. Food-chain transfer evaluated by measuring plant after kitchen-style washing, a...
Urban soils may contain harmful concentrations of contaminants, such as lead (Pb), arsenic (As), and polycyclic aromatic hydrocarbons (PAHs), that can transfer from soil to humans via ingestion consumption food crops grown in soils. The objective this research was assess the effectiveness adding different compost types reduce both direct (soil-human) indirect (soil-plant-human) exposure Pb, As, PAHs humans. A field experiment conducted 2011 2012 at an urban garden site with elevated Pb (475...
The prevalence of manganese (Mn) in Southeast Asian drinking water has recently become a topic discussion, particularly when concurrent with elevated arsenic (As). Although Mn groundwater geochemistry been studied, the link between dissolved organic matter (DOM) quality and release is less understood. This work evaluates characteristics DOM, redox chemistry, distribution within Murshidabad, West Bengal, India. Shallow aquifer samples were analyzed for cations, anions, carbon, DOM properties...
Phosphorus (P) losses from flooded soils and subsequent transport to waterways contribute eutrophication of surface waters. This study evaluated the effectiveness MnO2 a zeolite Y amendment in reducing P release explored underlying mechanisms controlling release. Unamended amended (MnO2 or zeolite, surface-amended at 5 Mg ha–1) soil monoliths four clayey–alkaline were 22 ± 2 °C for 56 days. Soil redox potential dissolved reactive (DRP), pH, concentrations major cations anions porewater...