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Former sugarcane lands on the Island of Hawaii have elevated soil arsenic (As) from historical use of arsenical pesticides. The bioaccessible fraction of total As (As<SUB>TOT</SUB>), a measure of the potential for human As uptake by incidental ingestion of soil, is used in the a...

Leaching of arsenic, chromium, and copper from chromated copper arsenate (CCA)-treated wood poses possible environmental risk when disposed. Samples of un-weathered CCA-treated wood were tested using a variety of US regulatory leaching procedures, including the toxicity character...

In this study, a comparison of laboratory batch and column experiments on metal release profile from a mineral processing waste (MPW) is presented. Batch (equilibrium) and column (dynamic) leaching tests were conducted on ground MPW at different liquid–solid ratios (LS) to determ...

Phosphate amendments in calcareous lead (Pb)-contaminated soils to immobilize Pb may be hindered due to competition of Pb with calcium (Ca) that may inhibit the retention of Pb as a precipitation mechanism. This study explored the retention of Pb in a calcareous soil spiked and ...

US states and communities that are interested using life cycle assessment (LCA) face the challenge of satisfying heavy requirements related to acquiring data/models, tools, and expertise. Although existing tools developed by EPA and others are useful for domain-specific applicati...

Harmful algal blooms (HABs) pose severe health threats due to the release of toxins and the appearance of hypoxia in water bodies. In addition, HABs lead to significant economic losses since they impact tourism, recreational and commercial activities, and property values [1]. App...

Harmful algal blooms (HABs) pose severe health threats due to the release of toxins and the appearance of hypoxia in water bodies. Also, HABs lead to significant economic losses since they impact tourism, recreational and commercial activities. The key cause of HABs is nutrient p...

This presentation will discuss the speciation of Hg in FGD materials relative to potential transport and risk issues.

Organic matter in soils and sediments is widely distributed over the earth's surface occurring in almost all terrestrial and aquatic environments (Schnitzer, 1978). Soils and sediments contain a large variety of organic materials ranging from simple sugars and carbohydrates to th...

The inability to determine metal species in soils hampers efforts to understand the mobility, bioavailability, and fate of contaminant metals in environmental systems, to assess health risks posed by them, and to develop methods to remediate metal contaminated sites. Fortunately,...

The report presents an evaluation of six materials management technologies that were assessed with respect to each technology's process, material and energy pathways, commercialization status, and associated economics. The inclusion and implementation of a materials recycling pr...

This report, Methodology to Estimate the Quantity, Composition and Management of Construction and Demolition Debris in the US, was developed to expand access to data on CDD in the US and to support research on CDD and sustainable materials management. Since past US EPA CDD estima...

Industries in the United States generate large volumes of non-hazardous wastes, sludges, by-products, and spent materials that require disposal or other end-of-life management. Solid-waste management stakeholders are increasingly employing or researching methods for beneficial r...

The stabilization of Pb on additions of P to contaminated soils and mine spoil materials has been well documented. It is clear from the literature that different P sources result in different efficacies of Pb stabilization in the same contaminated material. We hypothesized that...

Increasing commercial use of nanosilver has focussed attention on the fate of silver (Ag) in the wastewater release pathway. This paper reports the speciation and lability of Ag in archived, stockpiled, and contemporary biosolids from the UK, USA and Australia, and indicates that...

Novel reactive materials for catalytic degradation of chlorinated organic compounds in water at ambient conditions have been prepared on the basis of silica-supported Pd-Fe nanoparticles. Nanoscale Fe-Pd particles were synthesized inside porous silica supports using (NH<SUB>4</S...

Livestock farming is one of the main generators of organic waste, associated with considerable nitrogen and phosphorus emissions and nutrient pollution. Considering only the U.S., where the cattle population is around 51.8 million [1], and that a single dairy cow generates around...

Various anthropogenic activities generate hazardous solid wastes that are affluent in heavy metals and organics, which can cause significant damage to the environment and human health. Heavy metals can exist in multiple oxidation states, and can undergo oxidation or reduction whe...

Urban soils within the Omaha Lead Superfund Site have been contaminated with lead (Pb) from atmospheric deposition of particulate materials from lead smelting and recycling activities. In May of 2009 the Final Record of Decision stated that any residential soil exceeding the pre...

Working in collaboration with US and international researchers, we have (1) updated the process models and added anaerobic digestion, (2) added mixed-integer optimization to allow for analysis of MSW system evolution over a period of time and reflecting changes in energy grid ove...

Sorption of polychlorinated biphenyls (PCBs) to sediment is a key process in determining their mobility, bioavailability, and chemical decomposition in aquatic environments. In order to examine the validity of currently used interpretation approaches for PCBs sorption, comparati...

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that have been in use since the 1940s in a wide array of consumer products. PFAS are persistent in the environment and bioaccumulate. Thermal treatment methods are currently applied to a variety of mater...

Modern sanitary practices result in large volumes of human waste, as well as domestic and industrial sewage, being collected and treated at common collection points, wastewater treatment plants (WWTP). In recognition of the growing use of sewage sludges as a fertilizers and as so...

An issue that began to receive more attention by environmental scientists in the late 1990s was the conveyancy of pharmaceuticals in the environment by way of their use in human and veterinary medical practices and personal care

The Jones Island Confined Disposal Facility (CDF) located in Milwaukee Harbor Wisconsin, receives dredged materials from normal maintenance of Milwaukee's waterways. Like many CDFs they face the dilemma of steady inputs and no feasible alternative for expansion. The Army Corps of...