Seawater Sampling Articles
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Fighting Saline Intrusion With Desalination
30 years of data show salinity of groundwater increasing even far from coasts After 30 years of monitoring wells, the latest U.S. Geological Survey (USGS) research shows groundwater across the nation is becoming saltier. It has long been known that seawater can intrude when coastal aquifers become depleted and sea levels rise, but the most recent research throws light on saline intrusion far ...
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Muharraq WWTP a unique facility in Bahrain
The Muharraq WWTP started operating in 2014 and is currently operating at its maximum design capacity of 100,000 m3/day. Almar Water Solutions has brought to the project, and the region, the capacity to develop the future expansion of Muharraq – the plant has an expansion plan of an extra 60,000 m3/day – or any other water projects under PPP schemes. According to a study by the World ...
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Green alternative methods for voltammetric analysis in different water matrices
Mercury-free methods for determination of heavy metals in boiler feed, drinking, and sea water samples. Stripping voltammetry uses electrochemical sensors for the determination of heavy metal ions in different types of samples. These can include boiler feed water, drinking water, sea water, beverages, and even industrial samples like plating baths. Low detection limits (between ...
By Metrohm AG
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Factors Affecting Dissolved Oxygen
Introduction Regardless of what type of sensor is used to measure dissolved oxygen, there are three factors that must be accounted for to ensure accuracy. They are: Salinity Pressure Temperature Each one influences the concentration at 100% saturation but temperature is unique because it also affects how oxygen interacts with sensor membranes. The rest of this article goes over how to ...
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Membrane inlet mass spectrometry method (REOX/MIMS) to measure 15N-nitrate in isotope-enrichment experiments
Using 15N stable isotope as a tracer to quantify N transformation rates in isotope-enrichment experiments improves understanding of the N cycle in various ecosystems. However, measuring 15N-nitrate (15NO3–) in small volumes of water for these experiments is a major challenge due to the inconvenience of preparing samples by traditional techniques. Lin et al. (2021) developed a ...
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Mekong Delta Faces Saline Intrusion Crisis
Longer periods of seawater intrusion in the river’s delta system threatens a collapse of Vietnam’s food chain The countless boats, houses, and markets on the Mekong River delta’s complex lattice of streams, rivers, and canals are home to millions of inhabitants, who all depend on the health of the delta. The 65,000-km2 region sustains 60% of Vietnam’s population and is ...
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Southern California Meets Water Demands and Controls Saltwater Intrusion
Application Due to increasing water demands, decreasing supplies of imported water, and recurring drought conditions, state and local governments are expanding or developing groundwater replenishment or recharge systems. These systems divert highly treated wastewater, which is typically discharged into the ocean or local surface waters, into natural storage areas. The reclaimed waters, once ...
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Stocking up filtration equipment for marine expeditions
February is here, and for many research teams across the world, that means it’s time to set sail. Shoulder seasons are an important time to conduct marine research because many algal and microbe species are in bloom. Whether your research has you voyaging the open sea or cruising in coastal waters, Sterlitech is here to stock the ship with all your laboratory filtration needs. We are proud ...
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Surrogate-based pumping optimization of coastal aquifers under limited computational budgets
The computationally expensive variable density and salt transport numerical models hinder the implementation of simulation-optimization routines for coastal aquifer management. To reduce the computational cost, surrogate models have been utilized in pumping optimization of coastal aquifers. However, it has not been previously addressed whether surrogate modelling is effective given a limited ...
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A novel cloud point extraction method for separation and preconcentration of cadmium and copper from natural waters and their determination by flame atomic absorption spectrometry
A sensitive and simple cloud point extraction method was developed for simultaneous separation and preconcentration of cadmium and copper prior to their determination by flame atomic absorption spectrometry. 4-phenyl-3-thiosemicarbazide was used as complexing agent and the cadmium and copper complexes were extracted from the aqueous phase by Triton X-114 surfactant. The effects of parameters ...
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Water pollution emergency 0f explosion in port of Tianjin - case study
Sample collection site: explosion central point outer drainage channel Water outlet of Tianjin port sewage treatment works Port of Tianjin surrounding sea area Collect water sample every hour, 24hours ongoing ...
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Fighting saltwater intrusion into groundwater supplies
As freshwater supplies around the world diminish, human intervention is needed to protect existing sources to slow the onset of water scarcity. One ongoing struggle is to preserve the water in underground aquifers, which cities often rely on for drinking water. Intrusion of saltwater into these underground supplies is rendering them unfit for consumption or irrigation. The rock and soil that ...
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Hydrochemical and multivariate analysis of groundwater quality in the northwest of Sinai, Egypt
The northwestern coast of Sinai is home to many economic activities and development programs, thus evaluation of the potentiality and vulnerability of water resources is important. The present work has been conducted on the groundwater resources of this area for describing the major features of groundwater quality and the principal factors that control salinity evolution. The major ionic ...
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How food production impacts global groundwater supplies
The ever-increasing global trade in food is accelerating groundwater depletion in many areas of the world, emptying aquifers faster than they can be naturally recharged, according to newly released research. Although groundwater depletion is a well-known and frequently studied issue, the new research focuses on how groundwater supplies are affected by international trade. Agricultural product ...
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Quality assessment of deep-well recharge applications in the Netherlands
Artificial recharge of aquifers can be performed for various purposes and under varying hydrogeological conditions. We present an overview of deep-well recharge applications which have taken place in the Netherlands over the last two decades. We present the purpose of each application, the issues which had to be resolved, the preventive measures which were taken to improve performance and the ...
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Simultaneous UV-Vis spectrophotometric quantification of ternary basic dye mixtures by partial least squares and artificial neural networks
One of the main difficulties in quantification of dyes in industrial wastewaters is the fact that dyes are usually in complex mixtures rather than being pure. Here we report the development of two rapid and powerful methods, partial least squares (PLS-1) and artificial neural network (ANN), for spectral resolution of a highly overlapping ternary dye system in the presence of interferences. To ...
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Investigation and control of seawater intrusion in the Eastern Nile Delta aquifer considering climate change
Seawater intrusion is considered one of the main processes that degrade water quality by raising salinity. Over-pumping and decreasing recharge are considered the main causes of saltwater intrusion. Moreover, climate change and sea-level rise accelerate saltwater intrusion. In this paper SEAWAT code was used to study groundwater flow and seawater intrusion in the Eastern Nile Delta aquifer ...
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Chronic effects of non‐weathered and weathered crude oil and dispersant associated with the deepwater horizon incident on development of larvae of the eastern oyster, Crassostrea virginica
In this study we examined the effects of chronic exposure of eastern oyster (Crassostrea virginica) larvae to the water‐accommodated fractions of fresh and weathered oils collected from the Deepwater Horizon (DWH) incident, with and without additions of the dispersant Corexit 9500A, as well as to solutions of Corexit alone. We found that both shell growth of larvae exposed to test materials ...
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Simulation of seawater intrusion in the Nile Delta aquifer under the conditions of climate change
The problem of seawater intrusion is encountered in almost all coastal aquifers. Because of its higher density, the seawater migrates inland into freshwater aquifers even without any pumping activities. Excessive pumping of groundwater would accelerate seawater intrusion. Climate change and sea level rise represent critical parameters affecting the rate and degree of seawater intrusion. In ...
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Occurrence of antibiotics in pharmaceutical industrial wastewater, wastewater treatment plant and sea waters in Tunisia
Antibiotics are among the most commonly used group of pharmaceuticals in human medicine. They can therefore reach surface and groundwater bodies through different routes, such as wastewater treatment plant effluents, surface runoff, or infiltration of water used for agricultural purposes. It is well known that antibiotics pose a significant risk to environmental and human health, even at low ...
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