background: catalytic ozonation has recently been applied as a new method of contaminant removal from water and wastewater. in this study, copper coated pumice and zeolite were used to catalyze the ozonation of phenol as a target pollutant from aqueous solutions. methods: the pumice and zeolite stone were modified by cuso 4 (1n). modified pumice and zeolite were characterized by adsorption/deso...

Elevated concentrations of sulfate (500-4000 mg/L) exist in certain neutral drainages that contain reactive rock, but sufficient carbonate to neutralize the sulfuric acid produced. Due to concerns that sulfate may degrade surface water, cost-effective methods are required for reducing the contaminant load into these streams. This review examines methods primarily for sulfate removal, although s...

Arsenic (As) contamination in groundwater remains a pressing global challenge. In this study, we evaluated the potential of green rust (GR), redox-active iron phase frequently occurring anoxic environments, to treat As at former wood preservation site. We performed long-term batch experiments by exposing synthetic GR sulfate (GRSO4) As-free and As-spiked (6 mg L?1) natural both 25 4 °C. At °C, ...

While energy efficiency is important, the adoption of energy-efficient ventilation systems still requires the provision of acceptable indoor air quality. Many low-energy systems, such as displacement or natural ventilation, rely on temperature stratification within the interior environment, always extracting the warmest air from the top of the room. Understanding buoyancy-driven convection in a...

Farmed Atlantic salmon (Salmo salar) from Maine and eastern Canada, wild Alaskan Chinook salmon (Oncorhynchus tshawytscha), and organically farmed Norwegian salmon samples were analyzed for the presence of polychlorinated biphenyls (PCBs), dioxin-like PCBs, polychlorinated dibenzo-p-dioxins (PCDDs), dibenzo-p-furans (PCDFs), and chlorinated pesticides. PCDD and PCDF congeners were not detected ...