Articles tagged with Surface Water Acidification
Researchers discovered that a significant drop in calcium levels in the ocean led to a massive decrease in carbon dioxide, driving global cooling and ending the planet's greenhouse era. The study suggests that changes in seawater chemistry played a key role in shaping climate history.
Researchers traced nitrate pollution in the Yangtze River Delta using an integrated multi-tracer approach. Manure was identified as a dominant source of nitrate in traditional agricultural areas, while aquaculture effluent emerged as a main pollutant in industrialized zones.
A new study reveals that North Pacific waters are acidifying more rapidly below the surface than previously thought. Researchers analyzed a 35-year record of ocean carbon measurements and found increases in carbon from natural decomposition, with accelerated acidification associated with fresher and colder waters.
A USC-developed shipboard system using limestone and seawater can remove up to half of carbon dioxide emitted from shipping vessels, cutting maritime CO2 emissions by 50%. The process mimics a natural chemical reaction in the ocean, where CO2 is absorbed into water pumped onboard and then neutralized through a bed of limestone.
Researchers at University at Albany found a near full recovery from metal pollution in Adirondack surface waters since the enactment of the Clean Air Act. The study analyzed sediment samples and found a greater than 90% reduction in metal contamination across four ponds.
A new study maps the daily movement of cyanobacteria in Florida's largest freshwater lake, revealing how these harmful algal blooms form and behave. The research provides critical insights into managing the risks associated with cyanobacteria blooms.
Researchers uncovered two electron-transfer mechanisms producing hydroxyl radicals, crucial in atmospheric chemistry. The findings reshape our understanding of acid-base chemistry and have implications for air quality, climate science, and biomedical processes.
A study of 17,972 wells in Brazil reveals that more than half of the country's rivers could suffer reduced flow due to groundwater seepage. The São Francisco River basin and MATOPIBA region are particularly critical areas, with intensive agricultural activity and climate change exacerbating the problem.
Researchers at Institute of Science Tokyo developed novel carbon-based materials to remove harmful 'forever chemicals' from water. The materials, utilizing lignin and glucose as carbon sources, effectively trap PFAS on their surface, allowing for efficient purification using membrane distillation.
Researchers have created custom-made adsorbent materials that can pull harmful phosphorus out of water by transforming cyanobacterial biomass into chemically modified activated carbon. The lanthanum-modified materials showed promise in removing excess phosphorus, even at high concentrations.
A new study from Duke University reveals that historic lithium mining is unlikely to contaminate surrounding waters with common pollutants like arsenic and lead. However, high levels of other metals including lithium, rubidium, and cesium were found in the mine's waters.
The Pantanal's soda lakes, characterized by high pH and salinity, have practically dried up due to rising temperatures and wildfires. The study found that certain types of lakes, such as eutrophic turbid lakes, emit methane due to cyanobacterial blooms and decomposing organic matter.
The Indian Institute of Science team proposes an on-site alternative using iron nanoparticles that can remediate heavy metals. The S-CMC-nZVI material showed nearly 99% efficiency at Cr6+ removal under different conditions.
Research by FAU Harbor Branch reveals that managing both phosphorus and nitrogen is crucial for tackling toxic cyanobacterial blooms in Lake Okeechobee. Human waste is identified as a major source of nutrients, with elevated nitrogen levels found in urbanized estuaries and the Kissimmee River.
A new technology combines femtosecond laser-designed lubricated slippery surfaces with electrostatic interactions to manipulate droplets. This allows for diverse working conditions and functions, including driving droplets on inclined surfaces, manipulating various liquids, and sorting particles.
A team of researchers has discovered a method to create the Leidenfrost effect at lower temperatures using engineered surfaces. By creating micropillars on a surface, they can increase the temperature at which water droplets hover, improving heat transfer applications.
A study published in Nature Geoscience elucidates the discrepancy between Martian and Earth-based organic matter. Researchers found that photodissociation of carbon dioxide in the atmosphere leads to organic matter with depleted carbon-13 content, pointing to an atmospheric process as the main source.
A new study finds that warming climate is causing a doubling of copper, zinc, and sulfate concentrations in metal sulfide-rich watersheds in Colorado's mountains. The greatest increases are seen at high altitudes, where natural chemical weathering of bedrock is the source of rising acidity and metals.
A study published in Global Change Biology found that low deep-water oxygen concentrations lead to increased algae growth and further oxygen declines. This positive feedback cycle can result in frequent algal blooms, disrupting lake ecosystems and human health.
Researchers have found that the key step to protein formation can occur in droplets of pure water, where amino acids connect to form peptides with the same 'L' handedness. The discovery resolves a paradox and provides new insights into the early stages of life's chemical evolution.
Researchers developed a water-based emulsion adhesive that can be separated by acidic or alkaline water, making it ideal for recycling. The glue's reversible nature enables efficient detachment of labels from bottles, reducing waste sent to landfill.
Researchers at São Paulo State University have developed a technique to remove glyphosate, a widely used herbicide, from contaminated water. By using functionalized cellulose fibers from sugarcane bagasse, they can effectively adsorb and remove glyphosate residues from an aqueous medium.
Associate Professor Tadashi Ando from Tokyo University of Science conducted a study to test the performance of OPC and OPC3 water models, evaluating their shear viscosities and comparing values to experimental calculations. The calculated viscosities for both models were very close, with notable accuracy at temperatures above 310 K.
Dr. Amir Asadi's team embeds patterned nanostructures into high-performance composites to achieve multifunctionality and structural integrity simultaneously. This approach offers a practical and scalable method for creating nanostructured materials with tunable properties, revolutionizing the manufacturing of high-performance composites.
Researchers at Sahmyook University have found that sub-200-nm nanobubbles exhibit remarkable stability under diverse conditions, including temperature changes and physical impacts. The study's findings suggest potential for real-life applications in various fields, such as pharmaceuticals and water treatment.
Researchers at Chalmers University of Technology have developed a cellulose-based material that can easily remove 80% of toxic dyes from wastewater using sunlight. The method is cost-effective, simple to set up, and could benefit countries with poor water treatment technologies.
The study identifies five exoplanets that resemble Venus in terms of radii, masses, and atmospheric conditions. By observing these 'exo-Venus' planets using the James Webb Space Telescope, scientists hope to uncover valuable insights into Earth's future and the possibility of a runaway greenhouse climate.
Scientists at KTH Royal Institute of Technology have developed a method to harness electricity from wood placed in water, producing small amounts of bioelectricity. By nanoengineering the wood's surface area and porosity, they improved electricity generation by 10 times compared to natural wood.
A study published in Scientific Reports suggests that between 10.3% and 82% of the global ocean may experience new climates with higher temperatures and lower aragonite saturation by 2100. The disappearance of these climates could force marine species to adapt rapidly or disappear.
KAUST researchers used high-speed imaging to observe collisions between air bubbles and water surfaces, finding that the air-water interface is more mobile than expected. The team also developed a method using thin films of fatty acids to immobilize free water surfaces, drastically reducing bouncing.
Researchers have introduced a new method for making desalination membranes, allowing for greater control over thickness and texture. The electrospray technique produces films as thin as four nanometers with improved surface roughness, leading to better desalinization performance.
Researchers at Yale University have made a major breakthrough in understanding how water conducts electricity, revealing a fundamental mechanism found in biology and chemistry. By capturing the structural changes in water molecules, they were able to demonstrate a precise process known as the Grotthuss mechanism.
A new study has discovered that fatty acids on water droplets react with sunlight to form organic molecules, challenging conventional wisdom. This process could significantly impact local ozone and particle formation, affecting climate, air quality, and health.
Cornell researchers have discovered silica-rich deposits in Spirit's wake on Mars, providing new evidence for a once-habitable environment. These findings are significant as they suggest a 'local habitable niche' on the planet's surface, supporting microbial life-like conditions.
The Queensland Government's decision will ensure 80% of residents drink fluoridated water within two years and over 90% by 2012. Fluoride introduction is expected to reduce dental decay by up to 65% compared to non-fluoridated areas.
Nitric acid is less reactive when exposed to air on water's surface, unlike its strong acidic behavior in bulk solutions. This finding has implications for understanding the role of nitric acid in the atmosphere and environment.
Acidic water from the Ijen Crater Lake in East Java poses a significant threat to both human health and local ecosystems, with high levels of aluminum and fluoride found in river water and groundwater. Researchers suggest channelling acidic water into the sea as a possible solution to mitigate this issue.
New England waters show little net change in acidity despite Clean Air Act reductions, researchers say; further changes expected as nitrogen regulations take effect.
Scientists have successfully pinned down water at a hydrophobic surface, revealing capillary waves that ripple against the surface. This finding may aid in understanding structure of water films near patchy hydrophilic-hydrophobic surfaces.
Hochella will analyze samples from acid-mine drainage sites in Germany and the US using advanced equipment to develop better models of metal transport. This work aims to improve understanding of toxic-metal-bearing phases and their distribution in drainage systems.
Researchers at Lehigh University have successfully made droplets of water move at faster rates by utilizing surface tension gradients and fast condensation, showing potential applications in heat transfer and microfluidic devices
Researchers at Washington University in St. Louis found evidence that hot and dry Venus could have had water in its past due to the chemical stability of tremolite at extreme temperatures. This discovery could help scientists determine if they should investigate hydrous minerals on Venus.
A team of scientists from the University of Massachusetts suggests that some Nasca lines in Peru may mark underground water sources. The research project, detailed in Discover magazine, indicates that the lines depict natural forces and are aligned with groundwater associated with faults in the bedrock.
Researchers found that carbon dioxide from human activities primarily ends up in the subtropical ocean, rather than the cold Southern Ocean. This new understanding challenges previous models and highlights the complexity of global ocean carbon sequestration.
Naturally occurring micro-organisms that live at the bottom of lakes and streams have been shown to convert gasoline additives, including MTBE, into harmless byproducts. The study suggests that these micro-organisms can act as a significant barrier to the entry of MTBE into surface water systems.
Kansas State University researcher Xiuzhi Susan Sun has developed a new soy protein adhesive that is water resistant, strong, and non-toxic. The modified soy protein molecule unfolds to promote water resistance and increases adhesive strength. This adhesive performed well in various tests, including ASTM standard tests for adhesives.
Researchers at Columbia University are adapting industrial materials based on sugar to create novel, eco-friendly surfactants for household, medical, and industrial uses. These sugar-based polymers offer better cleansing properties than traditional detergents and can be used in personal care products.
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.