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Sediment Core Articles & Analysis
33 articles found
In the quest to comprehend the dramatic changes in our environment over the past century, scientists from the University of Birmingham and Goethe University in Frankfurt have embarked on an extraordinary journey using what they call a DNA ‘time machine.’ This innovative approach utilizes the power of AI and DNA-based biodiversity analysis to unveil the mysteries of environmental ...
Physical sampling methods such as coring and well installation provide direct information but are limited in spatial and temporal resolution. Moreover, the disturbance caused by drilling or coring may damage fragile sediment structures causing ecological harm. ...
Description: A SediMeter was deployed in this water reservoir in order to collect data on the timing and amount of sedimentation in the water reservoir. Traditional methods include repeat measurements of the bed level, and taking of sediment cores, but they only allow the measurements of the net change between measurements, and are unable to ...
Perpendicular placement: The core sampler must make a vertical or straight entry into sediments to secure a reliably representative cross-section sample. Penetration: It must penetrate the sediments you expect to find and adaptable for many field situations. ...
A core, in marine research, is a cylindrical section taken from sediments underlying a water body. ...
A method for determination of chlorophenols (CPs) in sediments was developed using ultrasonic solvent extraction followed by solid-phase extraction, derivatization, and gas chromatography–mass spectrometry (GC-MS) analysis. ...
However, settled biomass, present in the sediments, can contribute to nitrogen removal by different mechanisms such as nitrification and denitrification. ...
Bottom hypoxia and consequential hydrogen sulfide (H2S) release from sediment in eutrophic estuaries is a major global environmental issue. We investigated dissolved oxygen, pH and H2S concentration profiles with microsensors and by sectioning sediment cores followed by colorimetric analysis. The results of these analyses were then compared ...
Climate proxies are preserved physical characteristics which assist scientists in making inferences about prehistoric meteorological conditions. Ice cores, fossils, tree rings, and pollen are several examples of proxies, which can be used to recreate past climates. ...
However, the site-specific characteristics of aquatic systems prior to disturbance are mostly unknown, due to the lack of historical water and sediment quality data. This study aims to introduce a method for filling this gap in our understanding, using dated sediment cores from the beds of aquatic environments. ...
However, the high potential of these contaminants to persist in sediment and bioaccumulate in biota means that they have remained a concern. ...
In order to understand the impacts of organic matter on geochemical process of Hg in hydroelectric reservoir, spatial and seasonal distributions of total mercury (THg) and methylmercury (MeHg) both in solid and liquid phases of sediment cores were investigated in Wujiangdu Reservoir (WJD) in Guizhou province, China. ...
Inputs of P are the sum of the external P load from the hydrological basin, the IPL, and P in atmospheric precipitation; outputs of P are the sum of sedimented P, and the removal of P in water and biomass, and the resulting IPL‐MB, is 26.4 ± 4.9 t/yr. Additionally P concentrations in sediment cores (SC) are analyzed, and the historical release of ...
As a result of long‐term metal mining and metallurgical activities, the sediment of Ross Lake (Flin Flin, MB, Canada) is highly contaminated with metals and other elements. ...
The team of researchers, led by Albarede, drilled cores of sediment from Portus harbour basin and the canal in order to study the lead isotopes. The cores serve as a record of the contaminants from the river Tiber that runs through Rome. Contaminants are trapped within the sediment, acting a bit like a time capsule, revealing ...
In this study, in situ and on-site permeameter tests were conducted in Clear Creek, Nebraska, USA to evaluate the effect of water temperature on streambed vertical hydraulic conductivity Kv. Fifty-two sediment cores were tested. Five of them were transferred to the laboratory for a series of experiments to evaluate the effect of water temperature on Kv. ...
Sediment cores from Xingyun Lake close to the pulp mill region of Jiangchuan (China), earlier found to be highly contaminated by pulping at least from the 1990s, were analyzed by HRGC/HRMS for the concentrations of 17 polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). Regarding the contribution of individual congeners, PCDD/F levels ...
It is a conductor for discharges and currents; being hygroscopic, it absorbs moisture and leads to insulation overheating. Sediment forms on the core, which increases transformer temperature. ...
Project: Island End River Sediment Cap Location: Boston, MA Products: Organoclay Reactive Core Mat? ...
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Project: Collins Cove Shoreline Revetment & Sediment Cap Location: Beverly, MA Products: Organoclay Reactive Core Mat Triton Marine Mattresses by Tensar Background: The project is situated on a former manufactured gas plant (MGP) site located along the Collins Cove coast of Beverly, MA. ...
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