Project

Environmental Selenium Research From Microscopic

20191212 ensp 0183 enspSelenium is a natural trace element that is of fundamental importance to human health The extreme geographical variation in selenium concentrations in soils and food crops has resulted in significant health problems related to deficient or excess levels of selenium in the environment To deal with these kinds of problems in the future it is essential to get a better understanding of the

Linking Selenium Sources to Ecosystems Local and Global

2020427 ensp 0183 enspLinking Selenium Sources to Ecosystems Mining Environmental sources of selenium Se such as from organicenriched sedimentary deposits are geologic in nature and thus can occur on regional scales A constructed map of the global distribution of Se source rocks informs potential areas of reconnaissance for modeling of Se risk including the

Meeting Report Methylmercury in Marine Ecosystems

Methylmercury MeHg a toxic organic form of mercury is the predominant form found in fish tissue People who consume large amounts of fish contaminated with MeHg have a higher body burden than do people who do not consume fish Mahaffey and Mergler 1998 The developing human nervous system is a sensitive target for MeHg exposure putting developing fetuses and young children at the highest

Coal mining and selenium Werner Antweiler

Selenium species in water can exist in dissolved and suspended particulate form What are the adverse effects of selenium on the ecosystem and human health While selenium is an essential element of nutritional needs of animals and humans it is only needed in a very small dosage Dietary reference values for humans are 55 75 micrograms per day

Sulfate as a Contaminant in Freshwater Ecosystems

201183 ensp 0183 enspAcknowledgments Funding USGS Priority Ecosystems Studies Program for South Florida G Ronnie Best Coordinator Florida Department of Environmental Protection Donald Axelrad CoAuthors William H Orem1 Cynthia C Gilmour2 David P Krabbenhoft3 and George R Aiken4 1U S Geological Survey Reston VA 2Smithsonian Environmental Research Center Edgewater MD

USGS Toxics Bibliographic Listing P

2020513 ensp 0183 enspThis data was compiled by the USGS Toxics Bibliographic Search Engine Pabich W J 2001 Denitrifiion of anthropogenic nitrogen in groundwater Measurement and modeling using stable isotopic and mass balance approaches Cambridge Massachusetts Institute of Technology Department of Civil and Environmental Engineering unpublished Ph D thesis 188 p

Acta Geochimica2006S1

Study of contents of selenium and arsenic in soil A longterm field experiment 397 Estimating contributions of sources of soil CO 2 at the shallower layer in a Japanese larch forest area 398 High resolution profiles of trace

Linking selenium sources to ecosystems San Francisco Bay

Linking selenium sources to ecosystems San Francisco Bay Delta Model Author Presser T S Title Linking selenium sources to ecosystems electronic resource San Francisco Bay Delta Model Theresa S Presser and N Luoma Format Online Resource Book Published

Groundwater depletion linked to climate change

202056 ensp 0183 enspGroundwater depletion linked to climate change quotOverpumping of groundwater for irrigation is mining dry the world s ancient Pleistoceneage icesheetfed aquifers and ironically at the

Linking selenium biogeochemistry to the sulfur dependent

Linking selenium biogeochemistry to the sulfur dependent biological detoxification of arsenic Other sources of arsenic in the nature are human activities such as mining source of selenium

Mountain mining damages streams Nature News

2019129 ensp 0183 enspMining had occurred at 208 of those sites where the average water conductivity was 650 181S cm −1 In the most intensively mined areas where 92

Selenium fate and effects in the aquatic environment

Selenium has a complex and not fully understood biogeochemistry in the aquatic environment as well as an unusual mode of toxicity acute via water column exposure chronic via food chain exposure It has the narrowest range between nutritional requirements and toxicity of any essential element and chronic toxicity is not readily predictable Selenium contamination of waters or even of

Aquatic Life Criterion Selenium Water Quality Criteria

Selenium can be released into water resources by natural sources via weathering and by anthropogenic sources such as surface mining coal fired power plants and irrigated agriculture How does Selenium Affect Aquatic Life Selenium is a nutritionally essential element for animals in small amounts but toxic at higher concentrations

Linking selenium biogeochemistry to the sulfurdependent

Linking selenium biogeochemistry to the sulfurdependent biological detoxifiion of arsenic Article 183 Literature Review in Environmental Microbiology 14 7 161223 183 April 2012 with 107 Reads

Linking selenium sources to ecosystems electronic

2004 Linking selenium sources to ecosystems electronic resource San Francisco Bay Delta Model Theresa S Presser and N Luoma U S Dept of the Interior U S Geological Survey Reston Va Wikipedia Citation Please see Wikipedia s template documentation for

Linking mercury carbon and nitrogen Scientific Reports

Tibetan Plateau is loed at a mountain region isolated from direct anthropogenic sources Mercury concentrations and stable isotopes of carbon nitrogen and mercury were analyzed in sediment

Phosphate Mining Marine

Linking Selenium Sources to Ecosystems Mining Mining removes phosphaterich beds and exposes organic carbonrich waste rock to Our emphasis in determining selenium sources was on marine oil shales Get Price Oceanica Dying Fast Mexico Senate Attacks Odyssey

Linking Selenium Sources to Ecosystems Mining USGS

202051 ensp 0183 enspThus mining of coal seams and their associated waste rock are primary geologic selenium sources that have the potential to affect aquatic ecosystems Selenium release to the environment during coal burning for power generation can be direct during combustion or indirect from disposal of solid combustion waste i e fly ash

Mining company reduce Selenium in wastewater

MicroC® supplemental carbon sources enable biological treatment for selenium removal as well as for the biodegradation of nitrates and sulfates commonly found in mining wastewater Challenges Selenium nitrogen and sulfur compounds are naturally occurring constituents of soil and rock

PDF Selenium removal from mining and process

Selenium is an important element that is required for humans animals plants and other life forms Selenium is naturally present in the Earth s crust and its worldwide distribution has led to

Linking Selenium Sources to Ecosystems San Francisco Bay

Linking Selenium Sources to Ecosystems San Francisco BayDelta Model U S Department of the Interior U S Geological Survey Fact Sheet 20043091 August 2004

New Books ETH Z

20071016 ensp 0183 ensp16 Selenium loading through the Blackfoot River watershed Linking sources to ecosystems T S Presser M Hardy et al 17 Selenium attenuation in a wetland formed from mine drainage in the Phosphoria Formation southeast Idaho L L Stillings M C Amacher 18

2019912 ensp 0183 ensp 17 Peng Gong Integrated analysis of spatial data from multiple sources Using evidential reasoning and artificial neural network techniques for geological mapping Photogrammetric Engineering amp Remote Sensing 62 5 1996 513523

Variation in TraceElement Accumulation in Predatory

Variation in TraceElement Accumulation in Predatory Fishes from a Stream Contaminated by Coal Combustion Waste Doblin MA Hieb KA 2004 Food web pathway determines how selenium affects aquatic ecosystems a San Francisco Bay case study 2010 Linking selenium sources to ecosystems Local and global perspectives Selenium guidelines

SCI

Li P Li Y Feng X Mercury and selenium interactions in human blood in the Wanshan mercury mining area China Science of the Total Environment 2016 573 376381 109 A

Dissolved Organic Matter Biogeochemistry

2011917 ensp 0183 enspDissolved Organic Matter Biogeochemistry Dynamics and Environmental Significance in Soils 63030 Dissolved Organic Matter Biogeochemistry Dynamics and Environmental Significance in Soils

6 Potential Environmental Effects of Uranium Mining

Uranium mining processing and reclamation in Virginia have the potential to affect surface water quality and quantity groundwater quality and quantity soils air quality and biota The impacts of these activities in Virginia would depend on sitespecific conditions the rigor of the monitoring program established to provide early

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