atmospheric deposition Articles
-
Alkylphenols in atmospheric depositions and urban runoff
A sampling campaign was conducted in order to determine alkylphenol (AP) concentrations in stormwater as well as potential AP sources in suburban environments. An analytical procedure was developed to quantify APs in bulk atmospheric deposition, building runoff, road runoff and stormwater. Both nonylphenols and octylphenols could be quantified in each sample. Median stormwater concentrations ...
-
Contribution of trace metals from atmospheric deposition to stormwater runoff in a small impervious urban catchment
The contribution of atmospheric deposition to emissions of trace metals in stormwater runoff was investigated by quantifying wet and dry deposition fluxes and stormwater discharges within a small, highly impervious urban catchment in Los Angeles. At the beginning of the dry season in spring 2003, dry deposition measurements of chromium, copper, lead, nickel, and zinc were made monthly for 1 ...
-
Designing a relational database for tracking and analysis of atmospheric deposition of mercury and trace metals in the Pensacola (Florida) Bay Watershed
The need to track and analyse the atmospheric deposition of mercury and trace metals in the Pensacola (Florida) Bay Watershed in recent years has resulted in the need for a data management system that will allow data to be efficiently stored, checked for errors, manipulated, retrieved for analysis and shared within the research community. In this paper, we describe a relational database that was ...
-
The chemical fractionation and potential source identification of Cu, Zn and Cd on urban watershed
This study showcases the chemical fractionation and primary source identification of Cu, Zn and Cd in road-deposited sediment. Results show that Zn and Cd were identified as easily mobilised and biologically available metals that pose high risks to the receiving aquatic environments. However, Cu was released in substantial amounts only under relatively extreme conditions. With the assistance ...
-
A comparative study of atmospheric deposits and lichen populations in a protected alpine area in the Grenoble region (France)
The atmospheric mixture deposited on ash tree stems was studied in Les Seiglieres, an alpine station located at an altitude of 1100 m in the Belledonne Mountains and in the town of Grenoble (300,000 inhabitants, altitude 200 m). The composition of the mixture of elements was fairly similar in the two stations, although the soil particles deposited on the stems had not the same geological origin. ...
-
Fate and spatial variations of polybrominated diphenyl ethers in the deposition within a heavily urbanized area: case of Paris (France)
In this paper, we present the first results on the geochemical cycle of PolyBrominated Diphenyl Ethers (or PBDE) in the Paris Region (France). In order to provide information about the distribution and mobility of eight PBDE congeners, we first determined the level of contamination of different environmental compartments: i.e. atmosphere, soils and waters. Atmospheric PBDE deposition was ...
-
Characterizinig Precipitation Chemistry in Changhua, Central Taiwan Using Weather Conditions And Multivariate Analysis
Few studies of atmospheric deposition come from the fast growing region of Southeast Asia. Precipitation in Changhua City in central Taiwan was collected to examine its chemical composition and relationship with meteorological patterns. Fifty percent of the precipitation measurements had pH<5.0. Deposition fluxes of most ions were comparable to that reported for heavily industrialized temperate ...
-
Modelling the effect of atmospheric nitrogen deposition on marine phytoplankton in the Singapore Strait
Atmospheric deposition is an important source of nutrients to the ocean, potentially stimulating primary production, but its relative effect on coastal eutrophication remains largely unknown. This paper presents data generated by the 3-D modelling program NEUTRO to assess the proportion of atmospheric nutrient fluxes, allowing a quantification of the relative contribution of atmospheric and ocean ...
-
Modeling Monomethylmercury and Tributyltin Speciation with EPA’s Geochemical Speciation Model MINTEQA2
Monomethylmercury (MMHg) is the compound responsible for the majority of fish consumption advisories in forty eight states in the United States of America. These widespread low level (but toxicologically significant) ecological exposures to MMHg result from microbial methylation of atmospherically deposited inorganic mercury in our national waterbodies. Tributyltin (TBT) is an industrially ...
-
Regional inhibition of cholinesterase in free‐ranging western pond turtles (Emys marmorata) occupying California mountain streams
The present study investigated the potential effects of cholinesterase (ChE)‐inhibiting pesticides on western pond turtles (Emys marmorata) occupying streams in two regions of California, USA. The southern region was suspected of having increased exposure to atmospheric deposition of contaminants originating from Central Valley agriculture. The northern region represented reference ChE ...
-
How lichens and mosses reflect atmospheric deposition of natural and artificial radionuclides
In a national survey in Slovenia, two biomonitors, the epiphytic lichen Hypogymnia physodes and the terrestrial moss Hypnum cupressiforme, were analysed for 210Pb and 137Cs. Further, the results for 210Pb were compared with outdoor 222Rn and with precipitation data. 210Pb activity concentrations in moss carpets and lichen thalli ranged between 180?2450 and 200?1990 Bq kg-1, respectively. 210Pb ...
-
Apply appropriate models in the study of dry deposition fluxes of particulate matter and polycyclic aromatic hydrocarbons (PAHs) in Tsukuba, Japan
In this study, plates for downward flux and upward flux were used to measure atmospheric dry deposition fluxes for particulate mass and polycyclic aromatic hydrocarbons (PAHs) in TERC (Tsukuba), Japan. Ambient particles concentrations were also collected using a high-volume air sampler, and ambient particle size distributions between 0.01 μm and 13.1 μm were measured using a low-pressure cascade ...
-
Estimation and Mapping of Wet and Dry Mercury Deposition Across Northeastern North America
Whereas many ecosystem characteristics and processes influence mercury accumulation in higher trophic-level organisms, the mercury flux from the atmosphere to a lake and its watershed is a likely factor in potential risk to biota. Atmospheric deposition clearly affects mercury accumulation in soils and lake sediments. Thus, knowledge of spatial patterns in atmospheric deposition may provide ...
-
Deconstruction of Historic Mercury Accumulation in Lake Sediments, Northeastern United States
Total atmospheric contribution of mercury (HgT) to lake sediment was estimated using 210Pb-dated sediment cores. Algorithms based on estimates of lake and watershed processes were applied to more accurately assess anthropogenic contributions of Hg to the environment and HgT. Factors addressed include: lake-specific background accumulation rates of Hg (HgB), variability of sediment accumulation ...
-
Estimation of potential impact on Copenhagen, Denmark due to accidental releases at Nuclear Risk Sites
This paper is focused on the testing of a methodology developed for nuclear risk and vulnerability assessment, and probabilistic evaluation of the long-term atmospheric transport and deposition patterns for radioactive pollutants from selected nuclear risk sites in the Euro-Arctic region. A combination of models (3-D trajectory, DERMA, and HIRLAM) was used to simulate such transport, dispersion, ...
-
Use of mosses to study atmospheric deposition of trace elements: contributions from investigations in Norway
This paper presents essential features of biomonitoring work carried out in the author's laboratory during more than 25 years using various analytical techniques for the determination of over 50 elements. A substantial part of this work concerns large-scale deposition surveys in Norway using the moss Hylocomium splendens, where five nationwide surveys have been carried out since 1977. ...
-
FATE AND EFFECTS OF POLY‐ AND PERFLUOROALKYL SUBSTANCES IN THE AQUATIC ENVIRONMENT – A REVIEW
Poly‐ and perfluoroalkyl substances (PFASs) are distributed ubiquitously in the aquatic environment which raises concern for the flora and fauna in hydrosystems. This critical review focuses on the fate and adverse effects of PFASs in the aquatic environment. PFASs are continuously emitted into the environment from point and nonpoint sources such as sewage treatment plants (STPs) and ...
-
Nitrogen deposition effects on carbon storage and fungal:bacterial ratios in coastal sage scrub soils of Southern California
Received for publication August 25, 2008. The effects of nitrogen (N) across a deposition gradient on bacterial and fungal degradation pathways were studied in southern California coastal sage scrub soils to determine whether elevated N levels alter microbial community structure and organic matter accumulation. Three sites across an N deposition gradient having low, intermediate, and high levels ...
-
Dynamics of atmospheric nitrogen deposition in a temperate calcareous forest soil
In temperate forest ecosystems, soil acts as a major sink for atmospheric N deposition. A 15N labeling experiment in a hardwood forest on calcareous fluvisol was performed to study the processes involved. Low amounts of ammonium (15NH4+) or nitrate (15NO3–) were added to small plots. Soil samples were taken after periods ranging from 1 h to 1 yr. After 1 d, the litter layer retained approximately ...
-
Patterns of Hg Bioaccumulation and Transfer in Aquatic Food Webs Across Multi-lake Studies in the Northeast US
The northeastern USA receives some of the highest levels of atmospheric mercury deposition of any region in North America. Moreover, fish from many lakes in this region carry Hg burdens that present health risks to both human and wildlife consumers. The overarching goal of this study was to identify the attributes of lakes in this region that are most likely associated with high Hg burdens in ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you