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Ruthenium oxides (RuO<SUB>2</SUB>•1.10H<SUB>2</SUB>O and RuO<SUB>2</SUB>) have been synthesized by forced hydrolysis and oxidation of ruthenium chloride. The resulting materials were extensively characterized to determine the crystallinity, surface area, and ruthenium oxidation ...

Understanding and predicting the fate and transport of nano-materials in the environment requires a detailed characterization of the chemical and physical properties that control fate and transport. In the current study, we have evaluated the surface charge, aggregation potentia...

Global plastic production was estimated to reach 360 million tons in 2018. However, over 90% of the spent plastic waste was either landfilled or incinerated, with both solutions being susceptible to releasing toxic substances and greenhouse gases into the environment. An improvem...

When extreme events (extreme heat, floods, droughts, wildfires) happen, hazardous materials or contaminants may be accidentally released from sites and waste facilities creating further hazards for surrounding communities. Understanding community vulnerabilities underlies prepare...

When contaminated sediments pose unacceptable risks to human health and the environment, management activities such as removal, treatment, or isolation of contaminated sediments may be required. Various capping designs are being considered for isolating contaminated sediment are...

When contaminated sediments pose unacceptable risks to human health and the environment, management activities such as removal, treatment, or isolation of contaminated sediments may be required. Various capping designs are being considered for isolating contaminated sediment are...

Performing risk evaluation is necessary to determine whether a chemical substance presents an unreasonable risk of injury to human health or the environment across its life cycle stages. Data gathering, reconciliation, and management for supporting risk evaluation are time-consum...

Non-hazardous solid materials from industrial processes, once regarded as waste and disposed in landfills, offer numerous environmental and economic advantages when put to beneficial uses (BUs). Proper management of these industrial non-hazardous secondary materials (INSM) requir...

Discharge of contaminated ground water may serve as a primary and on-going source of contamination to surface water. A field investigation was conducted at a Superfund site in Massachusetts, USA to define the locus of contaminant flux and support source identification for arseni...

As efforts are made towards establishing a circular economy that engages in activities that maintain resources at their highest values for as long as possible, an important aspect is understanding the systems which allow recycling to occur.&nbsp; In this presentation a common pla...

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Chemistry by its very nature is concerned with change. There are simple but significant interactions between air, water, and minerals that impact our natural environment. Minerals with well-defined structure are converted by various environmental chemical reactions into their e...

Soils in many locations are mineralized or were contaminated by industry (e.g. mine wastes; smelter emissions). Zn-Pb-Ag-Cu ores often caused severe Zn phytotoxicity which killed vegetation and prevented normal colonization; severe N and P infertility also contributed to difficul...

Soils in many locations are mineralized or were contaminated by industry (e.g. mine wastes; smelter emissions). Zn-Pb-Ag-Cu ores often caused severe Zn phytotoxicity which killed vegetation and prevented normal colonization; severe N and P infertility also contributed to difficul...

Clear Lake in Northern California has received inputs of mercury mining wastes from the Sulfur Bank Mercury Mine. About 1.2M tons of Hg-contaminated overburden and mine tailings were distributed over a 50-ha surface area due to mining operations from 1865-1957. The SBMM ws placed...

The surface normalized reaction rate constants (ksa) of trichloroethylene (TCE) and zero-valent iron (ZVI) was quantified in batch reactors at pH values between 1.7 and 10. The ksa of TCE linearly decreased from 0.044 to 0.009 L/hr-m2 between pH 3.8 and 8.0, whereas the ksa at pH...

The Agency's Office of Solid Waste and Emergency Response (OSWER) has recently issued improved guidance for the collection of "representative" samples from heterogeneous media. The Technology Innovation Office (TIO) has begun the development of a web-based handbook which advocat...

Within the scope of a number of emerging contaminant issues in environmental analysis, one area that has received a great deal of public interest has been the assessment of the role of pharmaceuticals and personal care products (PPCPs) as stressors and agents of change in ecosyst...

Large-scale disasters have the potential to generate a significant amount of waste. For example, Hurricane Katrina and the Joplin Missouri tornado resulted in 100 million and 1.5 million cubic yards of waste, respectively. Man-made chemical, biological, radiological, or nuclear (...

Large-scale disasters have the potential to generate a significant amount of waste. For example, Hurricane Katrina and the Joplin Missouri tornado resulted in 100 million and 1.5 million cubic yards of waste, respectively. Man-made chemical, biological, radiological, or nuclear (...

This is a technical support document which presents data to support an in vitro methodology to assess the bioavailability of lead in soil that correlates well with the in vivo juvenile swine assay.

Reactive activated carbon (RAC) impregnated with palladized iron nanoparticles has been developed to treat polychlorinated biphenyls (PCBs). In this study, we evaluated the effects of various reaction environments on the adsorption-mediated dechlorination of 2-chlorobiphenyl (2-...

The rapid increase in consumer electronics purchases has created a growing stream of used electronics in need of appropriate management. The average American owns 24 units per household, and the annual E-waste is estimated 1.8 M metric tons in 2015. Half of the states have enacte...

The Indiana Harbor Canal (IHC) is a waterway extensively polluted with heavy metals and petroleum. Since there are limited disposal options for the petroleum-contaminated sediments (PCSs) of the canal, the environmental impact of IHC dewatered sediment when used as partial repla...

Post-consumer use plastic can be employed as a feedstock in chemical processes, but first one needs an understanding of the amount and purity of these recycle streams. &nbsp;The same information supports the U.S. Environmental Protection Agency&rsquo;s report on Advancing Sustain...