Selenium removal from mining and process wastewater: a …
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 …Web
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Cannabis may contain heavy metals and affect consumer
A new meta-analysis, led by researchers at Penn State, examines the ability of cannabis plants to absorb heavy metals and discusses the resulting health impacts on consumers. The team proposes a ...Web
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Aquatic Life Criterion
The Selenium Technical Support Materials (TSMs) provide implementation support for states and authorized tribes for the national recommended Clean Water Act (CWA) section 304 (a) selenium aquatic life criterion for freshwater. The documents are related to (1) criterion adoption, (2) fish tissue monitoring, (3) assessing and listing …Web
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Optimization of Soil Washing to Reduce the Selenium …
The soil washing process was optimized by varying operational conditions and the chemical nature of the soil washing …Web
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Selenium Intake by Selected Vegetable Species After Foliar
In the Ambassador variety, the foliar application of 5 mg Se m −2 to the plant resulted in a 25.4-fold increase in its seed content (2.03 mg kg −1 DM) and a dose of 10 mg Se m −2 49.1-fold (3.93 mg kg −1 DM), which indicates that its increase depends on the applied doses. Foliarly applied selenium resulted in a similar increase in the content of …Web
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Potential Well Water Contaminants and Their Impacts | US EPA
Heavy metals include: arsenic, antimony, cadmium, chromium, copper, lead, selenium and many more. Heavy metals can contaminate private wells through groundwater movement and surface water seepage and run-off. People that consume high levels of heavy metals risk acute and chronic toxicity, liver, kidney, and intestinal …Web
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Effect of foliar spraying of organic and inorganic selenium …
Plant materials and phenotypic analysis during seedling treatments. The seeds of rice variety "LY9348" (Oryza sativa L.), purchased from Guoying Seed Industry Co., Ltd (Wuhan, Hubei, China), were submerged in 75% ethanol for 1 min and disinfected with 0.15% HgCl 2 for 1 min. After washing with sterile water six times, the seeds were …Web
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A State-of-the-Art Systemic Review on Selenium Nanoparticles
The plant extract is used to reduce the various concentrations of selenium acids/oxides/salts solution at room temperature, and their conversion to SeNPs takes …Web
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An Overview of Selenium Uptake, Metabolism, and Toxicity in Plants
Selenium content in food sources varies from plant to plant. It depends upon Se uptake and accumulating capacity of plant, soil Se content, which varies according to …Web
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Selinum wallichianum
Commonly known as Wallich milk parsley, Selinum wallichianum is a native of the Himalayas where it grows on the open, sunny slopes found there. In the UK it makes a fabulous border perennial bearing broad …Web
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Selenium-contaminated water: Recent advances in
Selenium is a major by-product in metal (copper, nickel, zinc, etc.) refineries and sulfuric acid processing plants, and the alarming levels of selenium in industrial wastewater can be seen in a selenium refinery wastewater in Japan with a maximum of 74 mg/L [60]. A range of human activities can alter the distribution of selenium in the ...Web
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Optimization of Soil Washing to Reduce the Selenium Levels of
Selenium extraction from soil was significantly improved by the presence of oxidizing agents in the washing solution: ∼38% Se was removed from the soil in the presence of 0.5% KMnO 4. In contrast, parameters such as treatment time, temperature, pH, L:S ratio, and competing ions did not significantly enhance the Se extraction efficiency.Web
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Can Hemp Clean Up the Earth?
In 2017, Gavin Stonehouse, a graduate student in plant biology at Colorado State University, started cultivating hemp plants in a special soil mixture dosed with varying levels of selenium. A ...Web
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Selenium-contaminated water: Recent advances in
The highly selective enrichment of selenium in selenium-containing wastewater and the recovery of high-purity elemental selenium have great research …Web
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Mechanisms underlying mercury detoxification in soil–plant …
Feasible countermeasures to mitigate mercury (Hg) accumulation and its deleterious effects on crops are urgently needed worldwide. Selenium (Se) fertilizer application is a cost-effective strategy to reduce Hg concentrations, promote agro-environmental sustainability and food safety, and decrease the public health risk posed …Web
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Selenium: A global contaminant of significant concern to …
Selenium in plants. Selenium is an essential nutrient for many organisms. While certain algae require Se to make selenoproteins, no such requirement has been shown by higher plants. ... Conventional decontamination techniques like soil washing and soil replacement appear to be too costly, environmentally destructive, and ex situ.Web
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Selenium contamination, consequences and remediation …
Concentrations of selenium in plants are associated with surrounding selenium levels in the soils. Incorporation and redistribution of selenium by the roots occurs rapidly, however, it is dependent on the physiological conditions and plant species. ... The technique uses a low-level direct current as "cleaning agent", several transport ...Web
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In situ and ex situ bioremediation of seleniferous soils from
Purpose Selenium (Se) toxicity or deficiency disorders are chiefly associated with Se concentration and speciation in soils. Elevated soil Se content may lead to contamination of water bodies and groundwaters due to the leaching caused by rainfall and irrigation. This study is focused on Se removal by in situ (biostimulation and …Web
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Aquatic Life Ambient Water Quality Criterion for Selenium in …
Selenium is a naturally occurring element present in sedimentary rocks, shales, coal and phosphate deposits and soils. There are around 40 known selenium-containing minerals but all are rare and generally occur together with sulfides of metals such as copper, zinc and lead. How Does Selenium Enter Surface Waters? Selenium can be released inWeb
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Selenium sulfide: Uses, Side Effects, Dosage & Reviews
Typical dosing for Selenium sulfide. Dandruff and seborrheic dermatitis of the scalp. 1% Shampoo (OTC): Shake the bottle well before using. Wet your hair, apply selenium sulfide onto the scalp and massage gently into a full lather, then rinse off thoroughly. Use at least twice a week or as instructed by your provider.Web
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Selenium Removal from Industrial Wastewater
Selenium is by now a well-known pollutant, present in various coal and hard-rock mines and some thermal power plant effluents through the world. Veolia has developed the Tracer Se process (patent pending), which is a new method for selenium removal based on biological reduction of selenium to selenite, its subsequent removal from water using …Web
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10 Nutritious Plant Foods Rich in Selenium
Fish and meat are great sources of the mineral, but there are many plant-based foods that particularly selenium-rich. This is great news for vegetarians, vegans and people who want to limit the amount of meat they consume. As an alternative, here are 10 nutritious selenium-rich plant foods. 1. Brazil Nuts.Web
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Technologies to Remove Selenium from Water and Wastewater
Accumulated selenium in plants protects plants against aphids, weevils, cabbage loopers, cabbage root flies, beetles, s, and crickets due to both deterrence and toxicity. Mechora ( 2019 ) concluded that the use of selenium can be an alternative pest management method to conventional plant protection products that pose …Web
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Fluidized Bed Reactor (FBR)
Envirogen is an industry leader in the use of bioreactor technology, with over 40 FBR systems installed worldwide and several projects under development. The Envirogen fluidized bed reactor is a proprietary …Web
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Selenium Metabolism in Hemp (Cannabis sativa L
Selenium (Se) is found in plants both in inorganic and organic forms as selenoamino acids and methylated complexes. Se influences growth and physiological parameters, viz. root and shoot growth ...Web
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Research and Industrial Application of Selenium and
Selenium can occur in four oxidation states: selenide (−2), elemental selenium (0), selenite (+4), and selenate (+6). In general, selenate has a high solubility and is the most mobile in water, which is challenging for both selenium removal and recovery. Selenium Control. Selenium control in solution discharge is necessary and critical for ...Web
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Selenium in Plants | SpringerLink
Selenium (Se) and sulfur (S) are chemically similar. Most plants cannot discriminate between the two, with the exception of Se hyperaccumulator species, which preferentially accumulate Se over S. Genetic engineering of various genes from the S/Se assimilation pathway has successfully enhanced plant Se tolerance, accumulation, and …Web
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Selenium accumulation by plants | Annals of Botany | Oxford …
SELENIUM UPTAKE, TRANSLOCATION AND METABOLISM IN PLANTS. Plant roots can take up Se as selenate (SeO 4 2–), selenite (SeO 3 2–; HSeO 3 –; H 2 SeO 3) or organoselenium compounds, such as selenocysteine (SeCys) and …Web
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The fascinating facets of plant selenium accumulation – …
I. Introduction. Selenium (Se) is arguably one of the most interesting elements for biology because it is both essential and toxic for most species, with a very narrow window between deficiency and toxicity compared with other trace elements (Stadtman, 1990).Another interesting property of Se is that it can exist in many oxidation …Web
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Methods for selenium removal from contaminated waters: a …
Worldwide contamination of waters by metals, metalloids, and organometallic pollutants is a major health issue. In particular, the occurrence of the selenium metalloid at rather high concentrations in the environment, especially in the water compartment, is of increasing concern, notably in developing countries. Selenium is difficult to remove from …Web
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