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 · Regression curve of the initial Fe 3+ / total selenium ratio required for the removal of 85% - 95% of initial total selenium in industrial wastewater. For example, a concentration of 7600 mg/L of FeCl 3 required for removal of 85% - 95% of initial total selenium of 80 mg / L is calculated. The required reaction time is estimated to be 80 ...

 · SeQuester is a targeted physical chemical process designed to remove selenium from effluent water in industrial wastewater applications. This innovative …

The present method removes selenium from an aqueous refinery stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter that can include clay, cellulose, starch, activated carbon, and the like. ... Justia Patents US Patent Application for Selenium removal method Patent Application (Application ...

 · Also, different remediation methods for selenium removal from water have been investigated. Principally remediation methods are categorized in three groups: Physical, Biological and Chemical. Recent research advances in each group including Phytoremediation, Bioremediation, Electrocoagulation, Adsorption and etc. is discussed …

 · An iron coprecipitation unit at the industrial scale. This technology is a well-known and well-accepted chemical process for the removal of metals and metalloids, including the removal of selenium and arsenic, and has been widely implemented in various industries; briefly, a ferric salt is added to the effluent, forming an amorphous iron …

 · The present method removes selenium from an aqueous refinery stream by passing the aqueous stream, in combination with a quaternary amine compound, through …

Enrichments were collected from sediments in different vegetated or non-vegetated seepage collection ponds, and all demonstrated the potential for dissolved selenium removal. …

 · The removal of selenium down to permissible limits is challenging and conventional methods have been suffering with certain limitations including its cost‐intensive nature.

 · Described herein is a cost effective means for selenium recovery and refining relying on an impregnated substrate. The substrate is impregnated with selenium and provides a system and method for the environmentally safe discharge of previous selenium-contaminated solutions and an environmentally safe discharge of industrial waste water.

 · Additional removal of metals and other parameters, No liquid waste, and A minimal volume of hazardous solid waste. Process Description. The mostmon method for removing high concentrations of sulfate from water is through addition of hydrated lime (Ca(OH)2), which precipitates calcium sulfate: Na 2 SO 4 + Ca(OH) 2 => CaSO 4 + 2 NaOH

2  · ABMet is a revolutionary biological process that removes metals and inorganics from wastewater to below non-detect levels. The ABMet process uses naturally occurring, non-pathogenic microbes to reduce and precipitate target compounds. The result is a highly efficient biological system that can remove 99%+† of selenium, nitrate, and other ...

 · A Non-Biological Process for Selenium Removal from Industrial Wastewater. Posted by ChemTreat On 07/27/2020. One of the primary, and heretofore costly-to-remove, contaminants in coal-fired power plant wastewater streams is selenium. Concerns now abound regarding selenium toxicity in other streams, including mine tailings wastewaters, …

 · Described herein is a cost effective means for selenium recovery and refining relying on an impregnated substrate. The substrate is impregnated with selenium and …

Justia Patents Utilizing Organic Agent US Patent for Selenium removal methods Patent (Patent # 6,090,290) Selenium removal methods . Jan 25, 1994 - Xerox Corporation. A method for removing selenium from waste water is disclosed comprising reducing selenium oxide with carbohydrazide in a solution comprised of the selenium oxide to form …

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.

 · 1. Introduction. Selenium is an essential element for humans, but it is associated with acute toxicity above 1.4 mg l −1 and with mutagenicity above 12 mM [1,2].It commonly exists under four oxidation …

 · and industrial euents because selenium is often present in complex polycontaminated mixtures, thus inducing competi-tion issues with other anions. Moreover, the eciency of remediation methods depends on selenium speciation and water parameters, e.g. pH and concentration of competing anions. Here, we review methods for selenium …

 · They observed a negligible Se(VI) removal (~4%) in the presence of ZVI alone; however, the Se(VI) removal increased to 72% with augmentation of 0.1 mM Fe(II) to the …

 · Request PDF | Physical and Chemical Methods for Selenium Removal | Selenium (Se) is a vital micronutrient for humans and animals at lower concentration. However, it can be toxic at elevated ...

It was noted that all of the AOP treated samples showed removal of selenium and it was established that the UV-Vis method has a lower limit of detection at 2 mg/L. Further, through this study, it was found that the chemical cavitation yield and selenium removal efficiency peaked at low frequency ultrasound of 40 kHz.

Dissolved selenium is removed from contaminated water by treating the water in a reactor containing selected endemic and other selenium reducing organisms. Microbes may be …

 · Selenium is an important nutrient for human and animal health at a range of 60–135 ppb but is toxic above this value, . According to EU and WHO standards, the maximum selenium content in drinking water is 0.01 ppm. There is no universal method for selenium removal from water.

 · For industrial scale selenium removal, the first possible method is iron coprecipitation and adsorption, further coupled, if necessary, with coagulation …

 · METHODS OF TREATING WATER TO REMOVE SELENIUM OR MERCURY Vladimir DJUKANOVIC;William HENDERSON;Nicholas SEYMOUR;Robert JEFFERS EP14860335.0 EP3068733B1 …

 · 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 …

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 · Also, different remediation methods for selenium removal from water have been investigated. Principally remediation methods are categorized in three groups: Physical, …

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Method of selenium removal. 6183644 - 5031354 - USPTO Application Feb 11, 2000 - Publication Feb 06, 2001 D. Jack Adams Timothy M. Pickett. Abstract. Dissolved selenium is removed from contaminated water by treating the water in a reactor containing selected endemic and other selenium reducing organisms. Microbes may be isolated from the ...

A method for removing selenium from an aqueous stream containing selenium, the method comprising passing the aqueous stream, in combination with a quaternary amine, …