Articles tagged with Water Pollution
A new water treatment process called activated magnetic sludge process has been introduced, which uses magnetic separation to reduce excess sludge production. The technique can treat up to 21 gallons of sewage daily without generating any excess sludge.
New porous materials show photoluminescence, ion exchange and gas sorption, having large surface area and uniform pore sizes. They have potential applications in electrochemical sensors, photocatalysts, solid electrolytes for batteries and gas separation.
Satellite images from NASA's MOPITT project show high levels of carbon monoxide in regions prone to pollution, such as Southeast Asia and Australia. These images provide a new tool for monitoring air quality and tracking the spread of pollutants over long distances.
A UCI study reveals a new method to identify and track specific sources of water pollution at beaches by combining bacteria sampling with genetic testing. The approach has already led to significant reductions in bacteria levels and beach closures in Catalina Island.
A recent study found that green sturgeon in Oregon's Rogue River have extremely small home ranges, making them vulnerable to habitat loss and exploitation. The fish can grow up to 19 feet long, but are only protected by regulations for those under five feet.
A geophysicist has developed a cost-effective method for finding underground contaminants by measuring voltage between metal spikes inserted into the ground. The technique shows promise in detecting organic compounds like cancer-causing substances that don't conduct electricity, potentially streamlining remediation processes.
Researchers from the University of Houston are using a $3.2 million grant to develop computer models tracking dioxin movement through the environment. The study will provide critical data for regulatory agencies to implement plans reducing pollutants and achieving minimum water quality standards.
A recent study found a strong correlation between beach pollution and lunar cycles, tidal forces, and sunlight exposure. This could lead to inaccurate warnings and economic losses for local businesses.
Researchers have developed a method to measure spring output and analyze groundwater flow in the Blue Ridge province. The technique helps determine how much water is available for wells, addressing a pressing issue in Virginia due to drought and rapid growth.
Researchers from Newcastle University successfully classified 70% of River Ouseburn water samples by measuring natural fluorescence, which could aid in detecting organic pollutants. The 'glowing' technique uses spectrophotometry to fingerprint dissolved organic matter in rivers.
The study reveals how aluminum floc forms in polluted streams, binding to toxic metals and transporting them downstream, harming fish and other aquatic animals. Understanding the molecular pathways of this process may lead to practical solutions to prevent the reactions.
A study by MIT researchers found that nitrate pollution has a mitigating effect on arsenic release in polluted lakes. The discovery sheds light on the complex dynamics of water quality management and has implications for other pollutants, including phosphate and toxic metals.
Researchers investigate the remarkable resilience of the mummichog fish to chronic pollution in the Elizabeth River. The study reveals that these fish have adapted through genetic changes, but this comes at a cost, such as increased cancer risk and reduced ability to thrive in clean environments.
A new study reveals that river traffic emits substantial nitrogen oxide, fine particulate matter, and sulfur oxides pollution, rivaling that of highways. The research, led by James J. Corbett, finds boat and ship emissions contribute significantly to regional air quality, particularly in the Columbia River Gorge National Scenic Area.
Researchers found that shipping-related imposex substances are not always transported to the seabed in stratified water. Instead, the harmful substance TBT, which causes imposex, is unable to sink through the boundaries between seawater layers.
Scientists took detailed measurements of a pollution plume containing Gobi desert dust and hydrocarbons on both sides of the Pacific, revealing elevated levels of pollutants. The study shows that Asian air pollution can affect air quality in North America, with significant implications for climate change.
A NASA study reveals that Zambia faces significant air quality challenges due to the transportation of pollutants across southern Africa. Ground-level ozone levels in Lusaka exceeded .90 parts per million during the day, posing serious health risks to local populations.
A new study suggests that tiny aerosols from human-produced pollution can weaken the global hydrological cycle, affecting water availability and quality. The research, published in Science, reveals that these particles can limit sunlight reaching the ocean, leading to reduced rainfall over polluted regions.
Scientists discover the lower Hudson River estuary is slowly cleaning itself due to tidal forces, storms, rain, and spring runoff stirring up polluted sediment. The process transforms contaminants into less toxic forms, allowing them to be released out to sea.
Researchers at Texas A&M University found that wind-borne pollutants can travel long distances, contaminating both air and water. They used rain and air samplers to collect pollutants in Corpus Christi Bay and estimated the amounts deposited into the bay area.
Researchers at Michigan Tech have deployed a laboratory on Pico mountain in the Azores to track air pollution drifting across the North Atlantic. The lab, known as PICO-NARE, will detect ozone, black carbon dust, and carbon monoxide, shedding light on the impact of local pollution on global warming.
A team of UMass microbiologists led by Derek Lovley has extracted solid gold from water containing dissolved gold using iron-reducing microbes. The process involves the transfer of electrons to form a more valuable metal form, resulting in the formation of gold deposits.
A Penn State researcher explains how atmospheric chemistry can alter the composition of air, affecting environmental quality, and how pollutants like acetone and formaldehyde contribute to ozone production. The study also explores the role of nitrogen oxide in complex chemical reactions that produce hydrogen oxides.
Texas A&M researchers Tom Whitworth and Alex Orsi are designing a customized cyber-atlas for the Southern Ocean, combining historical and recent data to generate tailored maps. The atlas will utilize WOCE data to establish a global ocean baseline for studying decadal variability.
A report by the North American Commission for Environmental Cooperation identifies industrial plants in the US as the main polluters of dioxin in Nunavut, with sources including municipal waste incinerators and cement kilns. The findings provide a new tool for governments to clamp down on polluters and control emissions.
A national team of over 150 researchers will study air pollution in the Houston region, combining data from six research aircraft and 60 ground-based monitoring stations. The goal is to identify cost-effective ways to control pollutants and protect public health.
Ground-level ozone levels are high enough to reduce growth and yield of sensitive plants on Long Island, where important agriculture is located. White clover has been particularly affected, with a 24-27% reduction in growth rate.
Two conferences will be held to present scientific findings on ocean issues, including fisheries, pollution, health, and gas hydrates. The events aim to develop a policy agenda for the US and internationally, with keynote speakers like Robert Ballard and Jean-Michel Cousteau.
Robert Criss has developed a new method to date water using oxygen-18 isotopes, providing a distinctive fingerprint for each water sample. This technique allows researchers to trace the age of water, track pollutant emissions, and understand the behavior of river systems.
The new land cover maps will provide more precise assessments of land use types, including residential development, wetlands, forests, and crop lands. The maps will help improve estimates of polluted water runoff into the Chesapeake Bay by identifying pasture land and different crops.
Researchers found that airborne sea salt particles undergo a chemical reaction in daylight to release chlorine molecules, which can influence ozone levels. This discovery suggests that sea salt particles may play a significant role in determining the levels of certain greenhouse gases and air pollutants in coastal urban areas.
A recent study published in Science reveals that urban and industrial air pollution can suppress rainfall and snowfall by creating clouds with abnormally small water droplets. This phenomenon occurs when pollution particles act as 'seeding' sites, preventing cloud moisture from condensing into raindrops and ice crystals.
New research suggests that aerosol pollutants in the atmosphere are likely masking global warming. Aerosols can modify clouds, suppress precipitation, and reflect light, cooling the Earth. This effect may be as large as the warming caused by human emissions of greenhouse gases.
Research suggests that urea from urban and agricultural runoff may trigger or sustain harmful algal blooms found off California's coast. The study found that a specific type of algae, Lingulodinium polyedrum, prefers urea over other nutrients.
Researchers found an ozone level of 85 parts per billion at 20,000 feet, exceeding the new U.S. EPA standard, and other pollutants like hydrocarbons and carbon monoxide were also detected. The high-pollution plume originated from East Asia and could pose health risks if it reaches ground level.
A recent study reveals that much of the information on global pollution is flawed due to the chirality of chemicals. This asymmetry affects how toxic pollutants interact with living organisms. The study finds that some pollutants may be less harmful than thought, while environmental changes could increase or decrease their toxicity.
A University of North Carolina at Chapel Hill marine scientist has warned of potentially devastating effects of Hurricane Floyd on the nation's largest lagoonal estuary, Pamlico Sound. The storm could lead to catastrophic flooding, runoff, and low oxygen conditions, harming commercial and recreational fisheries.
Biologists predict that global warming and pollution will lead to more frequent die-offs of sea life, with diseases such as distemper and herpes virus spreading among marine organisms. The study highlights the need for interdisciplinary research to understand the impacts of climate change on ocean epidemics.
Research finds that ship sulfur emissions contribute to acid rain, damage vegetation, and form clouds over the ocean. The study highlights the importance of addressing this issue for solving part of the global climate change puzzle.
A study found that African dust is a major factor affecting southeast U.S. air quality, with up to half of breathable particles in the air originating from Africa. The dust can push total airborne particles above the EPA's Clean Air Act limit on certain days.
A new study shows that International Maritime Organisation (IMO) rules are being applied globally, even by countries not bound to them. This shift indicates the IMO has taken on a universal law-making role, overseeing safety at sea and pollution prevention.
A USGS study published in Atmospheric Environment reveals that air in Washington's Mount Rainier National Park contains higher concentrations of ozone than nearby urban areas. This poses a threat to park visitors and the beautiful forests, wetlands, and alpine meadows within the park.
A dense brownish haze layer extended from the ocean surface to 1-3 km altitude, impacting climate processes over the northern Indian Ocean. The haze reduced solar radiation absorbed by the ocean surface by as much as 10%, altering weather and climate dynamics.
Hundred-year-old corals are succumbing to diseases they previously survived, highlighting the impact of rising ocean temperatures and worsening pollution on ecosystems. Researchers warn that as oceans become degraded, disease outbreaks and new pathogens may emerge, posing a significant threat to marine life.
Researchers have confirmed that Asian air pollution can travel to the US West Coast under specific meteorological conditions, with pollutants including carbon monoxide and particulates. The study found that air reaches the West Coast in about seven days, but can take as few as four or 10 days, depending on weather patterns.
A new report reveals that shrimp and salmon aquaculture may be depleting fisheries, disrupting coastal ecosystems, and polluting the ocean due to unsustainable practices. Improved practices, such as reducing fish feed requirements and minimizing pollution, are needed to make these industries more sustainable.
Despite high levels of mercury found in the Seychelles, a nine-year study found that frequent consumption of commercially sold fish carries no ill effects from low levels of mercury. The study suggests that current regulations in the US are sufficient to safeguard frequent fish eaters against mercury exposure.
Studies have shown that low doses of dioxin can cause spontaneous abortions, changes in the immune system, and developmental issues in animals. Fish are also being studied as models for understanding dioxin toxicity, with high levels of toxic pollutants found in northern environments, affecting polar bears, porpoises, and other species.
A Johns Hopkins University researcher is creating reliable predictions about how contamination will spread through soil, enabling public officials to charge equitable pollution impact fees. This information can also benefit private builders by deciding whether building on a particular site will be too costly due to pollution impact fees.
The report highlights the problems caused by nonpoint source pollution, including eutrophication, which can lead to fish kills, coral reef destruction, and shellfish poisoning. The report provides solutions, such as reducing fertilizer applications, improving sewer systems, and restoring wetlands.
Scientists have discovered a species of glowing bacteria that can detect pollutants in the deep sea. When exposed to various toxic substances, Photobacterium phosphoreum HE-1a glows up to 50% less brightly, triggering an alarm call that alerts nearby sensors to take action.
Biomass burning emissions from Africa and Australia travel long distances to reach remote islands in the South Pacific, contaminating the air with harmful tropospheric ozone levels. This phenomenon poses a significant atmospheric problem for the 21st century, affecting breathing and plant growth.
Researchers will describe emerging Pfiesteria detection technologies, including a firefly enzyme-based assay and DNA-based molecular probes, to minimize public exposure to the organism. The University of Delaware's Ocean Lunch and Lecture Series will host expert JoAnn M. Burkholder on March 18.
The Salton Sea Database Program will utilize GIS software to analyze data on the lake's ecosystem, including climate, soil, water quality, and vegetation. The program aims to inform decision-making and restoration efforts for the critically endangered Salton Sea.
The Pennsylvania Sea Grant will focus on extension, education, and communications, monitoring the ecology of Lake Erie's coast and Presque Isle peninsula. Studies will address non-point source pollution, invasive species, and environmentally friendly manufacturing development.
A new study reveals that Asian industrial smog is affecting the US West Coast, with 10% of ozone and pollutants coming from East Asia. The University of Washington's research station detected higher levels of pollutants such as nitrogen oxide, carbon monoxide, and ozone, which are likely to be lower in Asia just 30 years ago.
An international team of scientists conducted a study on air pollution in Mexico City's basin, where inversions trap pollutants and fine particles pose significant health risks. The study provides insights into particle concentrations, transport patterns, and implications for U.S. cities.
A newly isolated bacterium, coccoid Strain 195, reduces toxic tetrachloroethene and trichloroethene to nontoxic ethene gas. The Cornell researchers' discovery will lead to better pollution cleanup strategies in the field.
A double-blind study found that vitamin E and C supplements reduced sensitivity to ozone exposure and improved pulmonary function in asthmatic volunteers. The study suggests antioxidant vitamins may benefit others exposed to chronic oxidative stress, such as smokers or industrial workers.
The Weizmann Institute groundwater sampler, MLS, tracks microscopic particles to assess pollution spread and identify contaminated layers. It has been used to study the saltiness of the Sea of Galilee and help pinpoint areas where bacteria can clean up pollutants.