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Access Water Integrated Approach to Selenium Removal from ...

Oct 07, 2013· Mauro Marinetti's paper "Selenium Removal from a Refinery Wastewater: Integrated Approach from Source Control to Wastewater Treatment" will be presented by co-author Kar Munirathinam,CH2M HILL, on Tuesday, October 8 at 10:30 a.m. in TS303, during the Water Environment Federation Technical Exhibition and Conference, in Chicago, Illinois.

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Selenium removal method - Chevron U.S.A. Inc.

Since most refinery final effluents and natural waters include a mixture of selenate and selenite selenium species, it has been difficult to approach complete removal of selenium from refinery effluents or natural water using only one step.

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Solving the selenium problem - CIM

Nov 04, 2016· Selenium removal technology. Achieving these new levels is easier said than done. Selenium is a slippery, multi-headed problem for mining. For starters, any technology has to treat large volumes of water to remove tiny traces of selenium. ... Consequently, the approach to selenium treatment must be site-specific," said Kratochvil.

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US7282152B2 - Selenium removal method - Google Patents

The present invention provides a method for removing selenium from an aqueous stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter and recovering a treated aqueous stream which is depleted in selenium content relative to the untreated aqueous stream. The present method removes selenium from an aqueous refinery stream by passing the aqueous ...

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Biological Removal of Selenate and Selenite from ...

Jun 05, 2020· Jun 05, 2020· The purpose of this review is to summarize the literature available on biological removal of selenium oxyanions and their recovery as elemental selenium nanoparticles. In recent times, the capability of several bacterial and fungal strains to reduce selenate and selenite to form elemental selenium nanoparticles has been reported.

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Selenium Removal by Constructed Wetlands: Quantitative ...

Jan 01, 2003· Jan 01, 2003· Management of selenium (Se) -contaminated agricultural drainage water is one of the most important environmental issues in California. To evaluate the feasibility of utilizing constructed wetlands to remediate Se-laden drainage water and the role of biological volatilization in Se removal, 10 flow-through wetland cells were constructed in 1996 in Corcoran, …

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Selenium removal from water and its recovery using iron ...

Jan 15, 2013· This study relates to an adsorption method process for treating a fluid containing undesired selenium contaminants (Se 4+ and Se 6+) in order to clean the fluid of the contaminant and develop a process for recovering the adsorbent material.The approach for this purification process was made using iron (Fe 3+) oxide/hydroxide nanoparticles sol (NanoFe) as an adsorbent.

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Bioprocess Approaches for the Removal of Selenium from ...

With the aim of developing a biological process for selenium removal, the effects of a variety of parameters on the reduction of soluble selenium by a Bacillus sp. strain SF-1, which is capable of ...

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High Efficiency Adsorption and Removal of Selenate and ...

Apr 15, 2015· Apr 15, 2015· An alternative approach that has been investigated involves using an adsorbing media to soak up and remove unwanted inorganic selenium.7,8 Iron oxides (hematite, goethite and ferrihydrite) have been studied extensively as potential adsorbents for aqueous selenite and selenate. These materials

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"Approach to Arsenic and Selenium Removal from Fly Ash by ...

An approach to arsenic and selenium removal from fly ash is studied. This research includes a comparison of the leaching ability of ammonium oxalate, ammonium citrate, ammonium nitrate and EDTA to extract arsenic and selenium; use of common agricultural waste as a source of oxalate anion to remove arsenic and selenium from fly ash and estimation of additional calcium effects on arsenic and ...

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Intensifying Approaches for Removal of Selenium

The results indicated a selenium removal of 90% from the wastewater after 6 h of treatment, achieving a decrease in concentration from 0.30 mg L⁻¹ to 0.03 mg L⁻¹. ... This approach involves ...

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(PDF) Selenium removal from mining and process wastewater ...

the removal of selenium from contaminated wa ter were discussed wherein adsorption capacities in the range of 0.22 – 120 mg/g and 0.135 – 127 mg/g, respectively, were reported in the ...

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Selenium removal from petroleum refinery wastewater using ...

Feb 15, 2019· The efficiencies of selenium removal from wastewater for different periods of EC treatment are presented in Fig. 2. A selenium removal efficiency of 90% was obtained for 360 min of treatment with a current density close to 153 A m −2. The removal efficiencies using the same current density, but 60 and 240 min of EC treatment were 33.3% and 83 ...

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Selenium removal by clam shells and gravels amended with ...

Nov 10, 2020· Increasing selenium (Se) levels in aquatic environments raise concerns all over the world. This study investigated effects of organic amendments (cattail and reed litter) and porous media (gravels and clam shells) on Se removal efficiency of horizontal subsurface flow constructed wetlands. Our results show clam shells reduced Se (by mass) up to ...

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Selenium Removal from Refinery Effluent - JSE Consulting

Novel Approach for Removing Selenium from Phillips 66 Ponca City, OK Refinery Effluent AFPM, Oct 19, 2015 3 Fe(OH)3, while selenate is difficult to remove with …

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Selenium - Wikipedia

Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic.It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust.

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Selenium removal from mining and process wastewater: a ...

The removal of selenium from aqueous medium is complex and expensive, because of the high wastewater volumes generated, low discharge limits (even in μg/L) and the presence of Se(IV) and Se(VI) species (Santos et al. 2015).As regulatory limits are becoming stricter, selenium removal from wastewater has become more and more challenging.

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Review of Available Technologies for the Removal of ...

the Removal of Selenium from Water Presented by Tom Sandy/CH2M HILL North American Metals Council Selenium Work Group. November 24, 2009. 10:15 – 11:00 a.m. ... Industry-Specific Approaches to Se Removal • One size fits all approach is not possible ...

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