Drinking Water Contaminants

Discover methods for removing selenium contaminants from water. Learn about effective filtration options to ensure safe drinking water free from selenium. This is a factsheet about a chemical …

Biogeochemistry of Selenium compounds in the water …

micronutrient Selenium (Se). For the first time, the distribution of inorganic Se, reduced (Red.Se) and/or organic (Org.Se) Se, alongside volatile Se compounds was investigated in lake waters. …

Selenium Compounds in the Waste Water | SpringerLink

The bulk of solid selenides are intermetallic compounds. There are also many organic selenium compounds, and their nomenclature is expanding from year to year. Various …

Selenolanthionine is the major water-soluble selenium compound …

The most abundant selenium compound, accounting for about 40% of total Se was proved to be selenolanthionine, a selenium species that has never been unambiguously identified before …

The Sublime Element Selenium | Periodic Table| ChemTalk

When this compound reacts with water, it forms selenous acid, H 2 SeO 3. Many selenium compounds feature oxygen and a halogen attached. Selenium also forms cations called the …

JOURNAL ARTICLE: OCCUPATIONAL HEALTH …

Selenium and Its Inorganic Compounds (as Selenium) INTRODUCTION This guideline is intended as a source of information for employees, employers, physicians, industrial …

Technical Factsheet on: SELENIU

Selenium concentration in fresh water is usually around 0.02 ppm. The selenium content of surface water is greatly influenced by pH, being high in acidic (pH < 3.0) and in alkaline waters …

Technical Factsheet on: SELENIU

This amount is around 50,000 times greater than the selenium found in seawater. Selenium dioxide is the primary source of problems from industrial exposures since the dioxide forms …

Selenium compounds

The revised IDLH for selenium compounds is 1 mg Se/m3 based on acute toxicity data in animals. Skip directly to site content Skip directly to search. Español ... Biological action and the non …

Selenium in Drinking-water

Elemental selenium (14) and selenium sulfide (15) are poorly absorbed. After absorption, water-soluble selenium compounds appear to be rapidly distributed to most organs, the highest …

Selenium in Drinking-water

Selenium: A Wonder Element in Life and for Life

Selenium contents in soil and water bodies differ considerably depending on geographical regions. Its concentration in soil can vary between 0.01 and 2.0 mg/kg with an …

Drinking Water Contaminants

The greatest use of selenium compounds is in electronic and photocopier components, but they are also widely used in glass, pigments, rubber, metal alloys, textiles, petroleum, medical …

HEALTH EFFECTS

Because of greater bioavailability, water-soluble selenium compounds are probably more toxic than elemental selenium by any route. Selenium is found in nature complexed with multiple …

Chemistry

When amorphous selenium is oxidized in the presence of water, H 2 SeO 3 is formed. The latter is a weakly dibasic acid that frequently acts as an oxidizing agent. Dissolved selenites are …

Table 4-2, Physical and Chemical Properties of Selenium and Selenium

Table 4-2 Physical and Chemical Properties of Selenium and Selenium Compounds a. Property Selenium Hydrogen selenide Selenic acid Selenious acid; Molecular weight: 78.96: 80.98: …

Recent Advances in Selenium‐Mediated Redox Functional Group

The possibility to oxidise organoselenium compounds with H 2 O 2 and organic hydroperoxides under very mild conditions represents an attractive feature to develop …

Selenium Removal from Water and Wastewater by Different …

There are several treatment techniques that can be employed to remove Se from contaminated water and wastewater, including adsorption, bioremediation, photocatalysis, …

Synthesis of novel organic selenium compounds and speciation …

As water soluble selenium fraction was in the range between 22.9% (E-NS-4) and 56.2% (EDAG-11) of total selenium in the fortified sprouts, and selenium in the proteolytic …

Selenium Compounds

Drinking water usually contains selenium at very low levels (usually less than 0.01 milligrams per liter [mg/L]). However, occasionally, higher levels of selenium may be found in drinking water, …

Selenium Fact Sheet

Selenium is a metal found in natural deposits as ores containing other elements. The greatest use of selenium compounds is in electronic and photocopier components, but they are widely used …

Selenium Distribution and Chemistry in Water and Soil

The soluble forms of selenium compounds are mobile and their speciation in soil and water is highly dependent on conditions of specific location, however SeO 4 − has been …

Selenium contaminated waters: An overview of analytical …

For reasons of human health and ecotoxicity, selenium concentration has to be controlled in drinking-water and in wastewater, as it is a potential pollutant of water bodies. …

TOXICOLOGICAL PROFILE FOR SELENIUM

SELENIUM viii . Managing Hazardous Materials Incidents. is a three-volume set of recommendations for on-scene (prehospital) and hospital medical management of patients …

Antioxidant Activity of New Sulphur- and Selenium-Containing …

where A 0 is the absorbance of the control, and A is the absorbance of the test sample.. The concentration of a compound reducing radical concentration by 50% (IC 50) was calculated …

Review on environmental selenium: Occurrence, public health

Several studies confirmed that organic selenium compounds undergo photo-oxidation in water, and that their mineralization eventually yields inorganic Se species and …

Heterogeneous interface engineering of cationic vacancy defects …

Heterogeneous interface engineering of cationic vacancy defects layered double hydroxides and molybdenum-nickel-based selenium compounds to facilitate overall water …

Selenium

Selenium dioxide is an industrial exposure hazard since it forms selenite, an irritant, with water or sweat. Other selenium compounds released during coal or petroleum combustion may be …

Selenium

Caswell No, 732; CI 77805; Elemental selenium; Gray selenium; Selenium alloy; Selenium base; Selenium compounds; Selenium dust; EPA Pesticide Code: 072001 ... pharmaceuticals, …

4. CHEMICAL AND PHYSICAL INFORMATION

SELENIUM 217 4. CHEMICAL AND PHYSICAL INFORMATION 4.1 CHEMICAL IDENTITY Information regarding the chemical identity of selenium and selenium compounds is presented …

Selenium & compounds

Higher levels of selenium may be found in drinking water, usually in areas where high levels of selenium in soil contribute to the selenium content of the water. Occupational exposure to …

CHAPTER 1: The Chemistry of Selenium Free

Selenium is a chalcogen element with atomic number 34. Selenium's most stable allotrope is the hexagonal and crystalline form. Three main oxidation states of selenium are found: selenide (−2), selenite (+4) and …

Selenium | ToxFAQs™ | ATSDR

People may be exposed to low levels of selenium daily through food and water. Selenium is a trace mineral needed in small amounts for good health, but exposure to much higher levels …