A5044205253- Mercury impact and mitigation studies
- Toxic Organic Pollutants Impact
- Environmental Toxicology and Ecotoxicology
- Water Quality and Pollution Assessment
- Heavy metals in environment
- Fish Ecology and Management Studies
- Water Quality and Resources Studies
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Invertebrate Ecology and Behavior
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Municipal Solid Waste Management
- Environmental Justice and Health Disparities
- Helminth infection and control
- Minerals Flotation and Separation Techniques
- Enzyme Production and Characterization
- Study of Mite Species
- Oil, Gas, and Environmental Issues
- Radioactive element chemistry and processing
- Per- and polyfluoroalkyl substances research
- Vitamin K Research Studies
- Hydrology and Sediment Transport Processes
- Agricultural safety and regulations
Environmental Protection Agency
1995-2024
Ohio Environmental Protection Agency
1996
Abstract An earthworm avoidance test has potential advantages for use in evaluation of hazardous wastes sites. Because organisms often exhibit behavioral responses at lower levels stress than those that acute toxicity tests are able to detect, could provide increased sensitivity chemicals. Avoidance is an ecologically relevant endpoint neither nor sublethal measure. can potentially indicate a short period time, testing easily done soil matrix, and the specialized applications testing....
Industrial chemical contamination within coastal regions of the Great Lakes can pose serious risks to wetland habitat and offshore fisheries, often resulting in fish consumption advisories that directly affect human wildlife health. Mercury (Hg) is a contaminant concern many these highly urbanized industrialized regions, one which Saint Louis River estuary (SLRE), second largest tributary Lake Superior. The SLRE has legacy Hg drives high concentrations sediments, but it unclear whether...
Abstract The approach of the Environmental Monitoring and Assessment Program (EMA) to monitoring fish tissue contaminants is shown have utility for regional assessment, discrimination from local contamination. survey sampling design employed by EMAP can be used make assessments without conducting a complete resource inventory. Program—Surface Waters conducted 167 lakes in northeastern United States during 1992 through 1994 analyzed whole composite samples contaminants, including Al, As, Cd,...
Abstract The use of the 14-d earthworm toxicity test to aid in evaluation ecological impact contaminated soils is becoming increasingly widespread. However, method need further standardization. As part this continuing process, choice reference toxicants was evaluated. Reference were rated relation following criteria: (a) reproducibility, (b) low human health hazard, (c) feasibility measurement, and (d) chemical stability. Potassium chloride (KCl) ammonium (NH4Cl) evaluated as possible...
The unique challenges associated with sampling of macroinvertebrates in flashy urban streams create a methods gap. These form isolated pools for much the year, interspersed spates that scour and deposit excessive amounts sediment. Commonly used stream grab methods, such as nets Hess Surber fixed-area samplers, work well wadable perennial flow. Deployed samplers (Hester-Dendy, gravel tray) can be waters or without We evaluated three which don't require flow: modified Hester-Dendy (MHD), tray,...
The characteristics of petroleum-contaminated sediment (PCS) have been evaluated to assess whether the practice its beneficial reuse as a sole or supplemental energy source is sustainable relative other remediation options such monitored natural recovery (MNR), capping, off-site disposal. Some these for PCS are energy-intensive and/or require land utilization. and compositional analysis results indicate low carbon content (15-17%(wt)) corresponding values 5,200 kJ/kg (2,200 Btu/lb) 5,600...
Hester-Dendy (HD) multi-plate samplers have been widely used by state and federal government agencies for bioassessment of water quality through use macroinvertebrate community data. To help guide remediation restoration efforts at the Niagara River Great Lakes Area Concern site, a multi-agency study was conducted in 2014 to assess contribution seven major urban tributaries on US side river toward impairment River. As part this study, communities were sampled using two co-located versions HD...
ABSTRACT We determined effects of acidification on sediment aerobic heterotrophic exo-amylase and exo-protease producing microbial populations in addition to the total population. Acidification microcosms pHs 6, 5, 4, 3 followed by plate counts showed that numbers microbes, as well producers producers, decreased at pH 3. It appears may represent a critical level damage. Numbers heterotrophs also 4. all groups increased 6. An accompanying change species composition was observed with...