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... Floodplains are prone to plant invasions, which increase their roughness and decrease their flood conveyance capacity. In recent decades, extremely high floods have occurred in the Tisza River (Hungary) without an increase in discharge. This could be partly explained by land cover changes, as plough fields and pastures have been replaced by forest plantations and invasive plants have become widesp ...
Krystal J. Godri Pollitt; Jae-Hong Kim; Jordan Peccia; Menachem Elimelech; Yawei Zhang; Georgia Charkoftaki; Brenna Hodges; Ines Zucker; Huang Huang; Nicole C. Deziel; Kara Murphy; Momoko Ishii; Caroline H. Johnson; Andrea Boissevain; Elaine O'Keefe; Paul T. Anastas; David Orlicky; David C. Thompson; Vasilis Vasiliou
adsorption; carcinogenicity; carcinogens; chemical interactions; chronic exposure; dioxane; drinking water; environmental fate; exposure pathways; foods; groundwater; health effects assessments; health policy; human health; humans; liver; maximum contaminant level; microfiltration; physicochemical properties; remediation; solvents; uncertainty; water pollution; water supply; United States
Abstract:
... 1,4-Dioxane has historically been used to stabilize chlorinated solvents and more recently has been found as a contaminant of numerous consumer and food products. Once discharged into the environment, its physical and chemical characteristics facilitate migration in groundwater, resulting in widespread contamination of drinking water supplies. Over one-fifth of U.S. public drinking water supplies ...
Anthropocene epoch; Brassicaceae; Pinus; Platanus; Quercus; Salix; Ulmus; anthropogenic activities; cluster analysis; ecological succession; ecosystem services; ferns and fern allies; forestry; historical records; lakes; land use and land cover maps; landscapes; lead; palynology; pollen; radionuclides; remote sensing; sediments; spores; surface water; terrestrial ecosystems; urbanization; vegetation cover; watersheds; wetlands; China
Abstract:
... Land use and land cover changes (LUCCs) have largely altered terrestrial ecosystems and landscapes during the Anthropocene. Reconstructing past LUCCs is necessary to better understand terrestrial ecosystem succession and human-environment interactions so that ecosystem services can be used conservatively and developed sustainably. In this paper, we reconstructed the LUCCs over the past century in ...
... This study investigated the transport of 137Cs within a forest ecosystem by examining temporal changes in the inventory and determining the major pathways of transfer following significant atmospheric deposition. A forested area of eastern Japan was monitored for four years immediately after the Fukushima nuclear power plant accident in March 2011 that released a large amount of radionuclides. The ...
... The aim of this study was to assess the efficiency of photocatalysis by TiO2 on the removal of 17-β-estradiol (E2) (at environmentally relevant concentrations) and the toxicity caused by this emerging pollutant. After 60min of TiO2/UV treatment at pilot scale (14L), E2 was removed from water approximately 85%. The toxicity was established by using Cyprinus carpio as bioindicator organism and oxida ...
... Organophosphate flame retardants (OPFRs) are frequently found in the environment and could be adversely affecting organisms. In fact, nine OPFRs have been shown to cause endocrine disruptions, but information on the metabolism-perturbing properties of these OPFRs remains unclear. In this study, the ¹H-nuclear magnetic resonance (NMR) based metabolomic method was applied to evaluate the metabolic d ...
DNA methylation; RNA interference; adverse effects; angiogenesis; biomarkers; carbazoles; demethylation; human umbilical vein endothelial cells; phenotype; polymerase chain reaction; toxicity
Abstract:
... 2,7-Dibromocarbazole (2,7-DBCZ) is one of the most frequently detected polyhalogenated carbazoles (PHCZs) in the environmental media. 2,7-DBCZ has attracted public attention for its potential for dioxin-like toxicity and cardiovascular toxicity. However, researches on the potential mechanism of angiogenesis inhibition by 2,7-DBCZ is still insufficient. Herein, human umbilical vein endothelial cell ...
Christopher L. Dutton; Amanda L. Subalusky; Troy D. Hill; Julie C. Aleman; Emma J. Rosi; Kennedy B. Onyango; Kanuni Kanuni; Jenny A. Cousins; A. Carla Staver; David M. Post
basins; carbon; dry season; ecosystems; environmental factors; land use; mercury; nitrogen; paleoecology; people; pollution load; rivers; sediments; watersheds; wetlands; wildebeest; Eastern Africa; Nile River
Abstract:
... The Mara River basin is a trans-boundary basin of international importance. It forms the headwaters of the Nile River and serves as the primary dry season water source for an estimated 1.1 million rural people and the largest remaining overland migration of 1.4 million wildebeest in the Serengeti-Mara Ecosystem. Changes throughout the basin are impacting the quantity and quality of the Mara River, ...
data collection; edaphic factors; latitude; plutonium; radionuclides; soil; China
Abstract:
... The 240Pu/239Pu atom ratio is a very effective tool for the identification of the origin of plutonium (Pu) in the soil environment. We examine a dataset of 240Pu/239Pu atom ratios determined from surface and core soils at 240 sites across China. The data were compiled from 18 separate literature sources from the last 20 years. For the first time the spatial distribution (3 latitude bands and 7 nat ...
accidents; cesium; coasts; diet; fish; food choices; half life; marine environment; monitoring; nuclear power; power plants; radionuclides; seawater; Japan
Abstract:
... Concentration ratios (CRs), expressed by dividing 137Cs activity in seawater by that in marine biota (mainly fish), were obtained from the monitoring of 137Cs in coastal areas around Japan between 1984 and 2016. Before the TEPCO Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident (1984–2010), mean CRs of 137Cs, mainly from global fallout (i.e. CRGF), were almost constant for each species throu ...
adsorption; carbon nanotubes; electrochemistry; electron paramagnetic resonance spectroscopy; free radicals; gas chromatography-mass spectrometry; ion exchange; irradiation; moieties; photocatalysis; photoluminescence; photolysis; spectrometers; surface area; tetracycline; ultrasonic treatment; ultrasonics; vapors
Abstract:
... A novel photocatalytic carbon nanotube sponge with three-dimensional Bombax-structure was fabricated by a facile chemical vapor deposition followed by in situ ion-exchange approach. The as-prepared sponge achieved both high-efficiency adsorption and photocatalysis towards antibiotics, which can remove up to 90% of tetracycline within an hour. The morphology and mechanism of the photocatalytic CNT ...
agricultural soils; aquatic ecosystems; aquatic environment; base flow; geophysics; glacial deposits; hydrochemistry; intensive farming; landscapes; leaching; nitrogen; pollution load; public health; space and time; surface water; watersheds
Abstract:
... Nitrogen (N) leaching caused by agricultural activities is one of the major threats to the aquatic ecosystems and public health. Moving from the agricultural soils through the subsurface and reemerging to the surface water, N undergoes various biogeochemical reactions along pathways in the subsurface, which occur heterogeneously in space and time. Thus to improve our understanding on the fate and ...
decision making; ecosystems; electric vehicles; energy; freshwater; humans; hydrogen fuel cells; life cycle assessment; quantitative analysis; runoff; water shortages; water stress; United States
Abstract:
... Energy production typically consumes a large amount of fresh water, which is a critical resource for both human and ecosystem needs. Robust water impact analysis is prudent prior to deploying new energy systems at scale. While there are many water indices representing relative water availability (or scarcity), they are not suitable for analyzing the impact of consumptive water in the context of li ...
... Soil labile inorganic and organic phosphorus (L-Pi and L-Po) extracted by NaHCO₃ are potentially important sources of plant-available P. Their availability is strongly affected by soil physiochemical and biological properties. Here we conducted a field study in an arid region of northwestern China to investigate how L-Pi and L-Po dynamics are affected by changes in physiochemical and biological va ...
... Diclofenac (DCF), as an emerging contaminant in aquatic environments, has sparked increasing concerns about its impact on the environment. Nitrification in wastewater treatment processing has removed DCF to a large extent. However, the removal characteristics and mechanisms of DCF in the nitrification process are still poorly understood. In this study, enriched nitrifying sludge was used to invest ...
... Reducing atmospheric CO₂ is an international priority. One way to assist stabilising and reducing CO₂ is to promote secondary tropical forest regrowth on abandoned agricultural land. However, relationships between above- and belowground carbon stocks with secondary forest age and specific soil nutrients remain unclear. Current global estimates for CO₂ uptake and sequestration in secondary tropical ...
... Complete ammonia oxidizing bacteria (CAOB) have been recognized as a new member of ammonia-oxidizing microorganisms (AOMs) due to its single-step nitrification capability. However, the abundance and diversity of CAOB in environmental ecosystems were still far from known owing to the lack of specific molecular marker. Herein, a universal primer set specifically targeting both clades of CAOB amoA ge ...
Vespa velutina; World Health Organization; adults; dietary exposure; human health; ingredients; larvae; monitoring; nests; pollution; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; risk; risk assessment; social wasps; toxicity; South Korea
Abstract:
... Detecting polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in an organism's environment is ecologically significant. In particular, the detection of PCDD/Fs in organisms consumed as food suggests the possibility of human health risks. In South Korea, there is a unique custom in which social wasps, such as hornets, have been used as ingredients in traditional liqu ...
blue carbon; emissions; habitats; hydrocarbons; marine ecosystems; marine sediments; oils; petroleum; shorelines; Persian Gulf
Abstract:
... Massive consumption of petroleum since the past century has led to considerable emissions into marine ecosystems. Marine sediments may accumulate substantial quantities of petroleum and associated contaminants in oil-producing areas. Here, we report accelerated accumulation of total petroleum hydrocarbons (TPH) in ‘blue carbon’ vegetated ecosystems of the Arabian Gulf – the world's most important ...
... Extracellular polymeric substances (EPS) play significant roles in protecting cells against environmental stresses. However, little information is known about the roles of different EPS in these processes. In this study, the productions and physicochemical characterizations of soluble-EPS (S-EPS) and bound-EPS (B-EPS), the two different fractions of EPS from a green alga Chlorella vulgaris under t ...