removal selenium us5510040
Reductive removing selenium from electrolytic manganese ,
The removing process was controlled by interface control The apparent activation energy of removing selenium was determined to be 1594 kJmol-1 Key words iron powder, electrolytic manganese anolyte, reduction, selenium, separation, reaction kinetics...
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US Patent for Method and system for removal of selenium ,
A method for removing the oxy-anions of selenium from FGD scrubber purge water The purge water is contacted with free hydroxyl radicals to effect oxidation of reduced forms of sulfur to sulfate and the destruction of sulfur-nitrogen compounds present in the purge water The purge water is then subjected to chemical reduction and co-precipitation of selenium with an amount ,...
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Removal of selenium from water by complexation with ,
The selenium compounds are then removed by precipitation or sedimentation Optionally, an oxidizing agent may be added to the system prior to the addition of the poly dithiocarbamate Various filtration methods may be employed to remove the selenium-dithiocarbamate materials from aqueous liquids...
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Selenium Removal Technologies A Review
15-01-2016 0183 32 Selenium Removal Technologies A Review Selenium has emerged as a water treatment contaminant of concern in industries such as mining, oil refining, and power generation In southeastern Idaho phosphate mines, selenium has been a major issue for two decades and is currently the subject of a large-scale federally mandated cleanup effort...
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PROCESS FOR REMOVAL OF SELENIUM FROM WATER BY ,
A method for efficiently removal of oxidised selenium from liquid, such as FGD wastewater The method involves adding a non-iron-based reducing agent eg sodium dithionite and preferably Fe II ions to the liquid at a pH of above 75 or 8 and precipitating elemental selenium from the ,...
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Selenium and nitrate removal from agricultural drainage ,
Request PDF Selenium and nitrate removal from agricultural drainage using the AIWPS® technology Monthly Maximum Discharge Limits MMDL have been established for ,...
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US Patent for Removal of selenium from coal mining runoff ,
Overburden from surface coal mining in many regions can produce a rain runoff laden with selenium, in the selenate form This occurs from rainwater leaching through exposed selenium-containing rocks in the overburden The selenium-containing runoff water is caught in ponds Remediation of the pond water to remove selenate is performed by treatment with sulfur ,...
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Removal of Selenium from Water with Kaolinite
5 A method for removing selenium from contaminated water which comprises contacting the contaminated water with a a kaolinite clay selected from the group consisting of kaolinite, nacrite, halloysite, dickite, and odinite b a water phase with pH in the range of 4 to 9 6 The method of claim 5, wherein the clay is kaolinite 7...
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How to handle Alerts Popups in Selenium BrowserStack
21-05-2021 0183 32 Introduction to Popups in Selenium Popup is a window that displays or pops up on the screen due to some activity If one wishes to know about the various scenarios of pop-ups and how to handle them, read the documentation page How to handle popups in Selenium In selenium webdriver, there are multiple methods to handle popups 1...
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Removal of Selenium from Coal Mining Runoff Water ,
This occurs from exposed selenium-containing rocks in the overburden, from which selenate is leached out by the nearly-pure rainwater The selenium-containing runoff water is caught in ponds Remediation of the pond water to remove selenate down to permissible levels for discharge to lakes and streams is performed by treatment with sulfur-modified iron SMI in a ,...
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Compositions and methods for selenium removal
Methods for removing a target selenium entity from fluids by treating the fluid with a rare earth impregnated media containing an immobilized rare earth The methods including obtaining a contaminated fluid comprising water and dissolved selenate contacting the feed fluid with a rare earth impregnated media for removal of at least a portion of the selenate from the feed fluid ,...
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Selenium Removal Technology ChemTreat, Inc
SeQuester is a targeted physical chemical process designed to remove selenium from effluent water in industrial wastewater applications This innovative selenium removal technology reduces selenium concentrations via chemical and physical methods while helping avoid capital expenditures by transferring costs towards operations and maintenance...
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US Patent Application for Removal of Selenium from Water ,
The description relates to a composition and a method for reducing the concentration of selenium in water Contaminated water is contacted with a kaolinite clay characterized by a removal efficiency for selenatearsenate of at least 40 wt at ambient temperature The adsorption process is fast Following sufficient contact, the water is separated from the kaolinite clay...
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REMOVAL OF SELENIUM FROM REFINERY WASTEWATER
The invention provides a method of efficiently removing selenium from water The method involves adding an oxidant to the liquid, adjusting the liquid s pH to below 75, adding ferric salt in an amount such that less than a quarter of selenium in the liquid precipitates and adding a poly dithiocarbamate material to the liquid in an amount such that the amount of poly ,...