Selenium Removal Articles & Analysis
16 articles found
This reacted additional chemistry provides arsenic removal with greatly reduced competition from competing anions such as fluoride. As a result, Sorbster® media can simultaneously remove arsenic, fluoride and selenium anions as well as mercury, copper and other cations from wastewater streams. ...
In 2014, as part of a study of heavy metals removal from coal-fired power plant flue gas desulfurization scrubber water systems, Sorbster® adsorbent media was tested extensively. The media demonstrated a high proficiency for the primary contaminants targeted in the study, namely mercury, selenium and arsenic, but it also simultaneously ...
This reacted additional chemistry provides arsenic removal with greatly reduced competition from competing anions such as fluoride. As a result, Sorbster® media can simultaneously remove arsenic, fluoride and selenium anions and also mercury, copper and other cations from wastewater streams. The media is proficient for both arsenic (V) and ...
Summary Effluent water from client containing 184 ppb total and 182 ppb dissolved selenium at pH 7.62 was sampled for investigation of chemisorption removal by Sorbster® media. ...
A pond water containing 8.0 ppb dissolved selenium @ pH 7.00 was sampled to Sorbster for investigation of chemisorption removal by Sorbster® media. Selenium in this water was removed by Sorbster® media to an average of 2.25 ppb in a single column pass at a 26.7 minute water-to-media contact time to achieve the refinery ...
The selenium in these waters is generally present in a dissolved state and speciation studies report that the majority of this soluble selenium is present as the selenate (Se+6, SeO4) species. The University of West Virginia1 found that 90% of the selenium in the Mud River, WVA was present as selenate and selenate was measured at 70% levels in ...
A pond water containing 8.0 ppb dissolved selenium @ pH 7.00 was sampled to Sorbster for investigation of chemisorption removal by Sorbster® media. Selenium in this water was removed by Sorbster® media to an average of 2.25 ppb in a single column pass at a 26.7 minute water-to-media contact time to achieve the refinery ...
Sorbster was tasked with removing selenium from the retention pond of a coal fired power plant. ...
The Sorbster® Selenium Removal System treats selenium contamination in industrial process, ground and wastewater systems. The system combines Sorbster® Se-1, a highly effective adsorbent media for selenite and selenate removal with selected pretreatments to maximize selenium removal. ...
These benefits are perfectly matched for this project: construction of a subsurface biofilter cell system for the removal of selenium and nitrate. To meet this EPA requirement, the Irvine Ranch Water District (IRWD) developed a plan to address regional water quality treatment. The plan included the Cienega Filtration Facility adjacent to the Peters Canyon Channel ...
Mine drainage from the low-sulfur surface coal mines in southern West Virginia, USA, is circumneutral (pH > 6) but contains elevated selenium (Se) concentrations. Removal of selenite ions from aqueous solutions under anoxic condition at pH 6–8.5 by zero valent iron steel wool (ZVI-SW) was investigated in bench-scale kinetic experiments using wet chemical, ...
The treatment performance of a transportable subsurface-flow wetland was investigated by monitoring various forms of nitrogen, orthophosphate, oxygen demand, organic carbon, and selenium. Significant mass removal of constituents was measured under two hydraulic residence times (HRTs) (2.5 and 5 days). Inflow and outflow concentrations of nitrate-N and ammonia-N ...
The hybrid zero-valent-iron (hZVI) process is a novel chemical treatment process that has shown great potential in previous laboratory and field bench-top scale tests for removing selenium, mercury and nutrients from various industrial wastewaters. ...
A new method for the removal of arsenite [As(III)] and selenate [Se(VI)], which are difficult to remove by conventional water treatment methods from aqueous media, was investigated. This method involves the use of photocatalytic oxidation of As(III) and photocatalytic reduction of Se(VI). Also, a novel TiO2–adsorbent hybrid (HYB) which has photocatalyst sites and adsorbent sites on the same ...
In this study, a broad range of readily deployable metal removal technologies were tested on a US refinery's wastewater to determine vanadium, arsenic and selenium removal performance. ...
Wastewater selenium concentrations have increased due to improved flue gas scrubbing technology, while concurrently regulatory limits have become more stringent. In this presentation, the key challenges facing coal-fired utilities and state of the practice approaches for addressing these challenges will be reviewed. Selenium management has been a water ...