Selenium Water Treatment
Selenium removal from wastewater is an issue that many industrial sites trying to achieve discharge requirements must address. Selenium is a naturally-occurring element, however certain industrial activities can elevate selenium levels in both waste and process water. These activities include mining, refining, coal combustion, and other ...
Selenium Removal Technologies A Review
CH2M has written a comprehensive review article on selenium removal technologies for the North American Metals Council. This 233-page report includes specific approaches to selenium management …
Phillips 66's Selenium Removal Technology
Existing technologies for selenium removal are complex, costly and usually inadequate, especially considering the likelihood that regulations controlling selenium discharge will continue to tighten. Phillips 66's SeRT ® technology is a simple, fixed-bed process that looks and runs like many other refinery processes, SeRT ® technology is not ...
BQE Water Receives US Patent for Selen-IX™ Selenium …
BQE Water developed Selen-IX™ specifically to remove selenium from industrial wastewater to the most stringent limits in the US and Canada without relying …
Development of a Constructed Wetland Water Treatment …
On the basis of the fact that algae have the ability to volatilize substantial quantities of selenium (Se), we investigated the concept of including an algal pretreatment unit into a constructed wetland system for the removal of Se from river water entering the Salton Sea. Of six different algal strains tested, the most effective in terms of Se …
Nano composite application for selenium removal
Selenium removal from well water (closed due to high selenium concentrations, 0.1 mg/L) by the composite, brought levels to below the WHO limit (0.01 mg/L) and was selective for selenium even in ...
Selenium removal from water using adsorbents: A critical …
Selenium (Se) has become an increasingly serious water contamination concern worldwide. It is an essential micronutrient for humans and animals, however, can be extremely toxic if taken in excess. Sorption can be an effective treatment for Se removal from a wide range of water matrices. However, des …
Boron and Selenium Removal in Boron‐Laden
Archived Publications. Applied Turfgrass Science (2004–2014) Crop Management (2002–2014) Forage & Grazinglands (2003–2014) Journal of Production Agriculture (1988–1999)
Methods for selenium removal from contaminated …
Here, we review methods for selenium removal from water, wastewater, and industrial effluents. Technologies are based on zero-valent iron, iron-oxy-hydroxides, supported materials, nanofiltration ...
Methods for selenium removal from contaminated waters: a …
Removal of selenate (Se (VI)) at neutral pH was about 40%, and indeed relatively low. Unfortunately, no removal data for selenite (Se (IV)) is available. Nonetheless, based on the speciation of Se (IV) in Fig. 7, it is expected that Se (IV) removal would be maximum at pH 4 to 7, where selenium is dominantly monovalent.
Rapid adsorption of selenium removal using iron …
Then it was applied to remove selenium ions in an aqueous system. The data revealed that the optimum conditions for the highest removal (95.6%) of selenium were observed at pH 8.5, adsorbent ...
BQE Water Receives US Patent for Selen-IX™ Selenium Removal Technology
August 8, 2018. VANCOUVER, BC – BQE Water Inc. (TSX-V: BQE), a leader in the treatment and management of mine impacted waters, has been issued a US patent for its Selen-IX™ process technology. Patent 9,963,360 covers key aspects of the company's process technology for the selective removal of dissolved selenium from aqueous …
Recent advances in technologies for removal and recovery of …
Recent advances in technologies for removal and recovery of selenium from (waste)water: A systematic review - ScienceDirect. Journal of Environmental …
Removal of Selenium from Petroleum Refinery Wastewaters
Selenium in sour water stripper bottoms appears to be in reduced forms such as selenide (Se2-). The bottoms are discharged to the refinery wastewater treatment system, where some selenium is removed by biological treatment. The remaining selenium gets oxidized to selenite (SeO32-) and selenate (SeO42-). Selenium discharged to receiving waters ...
Aqueous selenium removal and distribution in
3.1 Aqueous selenium removal. Initial mean aqueous Se was 40.9 (± 0.42) μg Se L −1. Overall, aqueous Se removal improved from Cycle 1 (62%) to Cycle 2 (77%) (P = .0023). Differences between the cycles are likely attributed to a lag period associated with Se uptake in soil– microcosms and an increase soil adsorption in UNP …
Methods for selenium removal from contaminated waters: a …
The removal of selenium from drinking water, wastewater, and industrial discharges can be accomplished using techniques based on zero-valent iron, iron-oxy-hydroxides, supported materials ...
Selenium removal by activated alumina in batch
Selenium removal by activated alumina (AA) in batch and continuous-flow reactors was investigated in this study. The adsorption kinetics fitted pseudo-first as well as pseudo-second order models with equilibrium time for Se(VI) and Se(IV) adsorption of 8 and 12 hr, respectively. A significant higher adsorption capacity for Se(IV) than Se(VI ...
Thermodynamic insights into selenium oxyanion removal …
Specifically, TSSE can remove >99.5% selenium oxyanions and 96%–99.6% mercury from the discharge stream with the coexistence of sulfate at a six-fold increase in the concentration. In summary, we demonstrated that TSSE is promising either as a standalone or a pre-treatment technology to alleviate Se and Hg from FGD …
Application of a 2.9 MGD Open-Platform UF/RO System for Selenium
This presentation is about a 2.9 MGD UF/RO project for the purpose of removing selenium from a mine-influenced surface water. It's important because of the limited published work regarding UF/RO application for selenium rejection, and the use of an open-platform UF system in an industrial application, which is one of if not the first documented instances …
SELENIUM REMOVAL FROM GROUND WATER USING …
Laboratory studies were performed to determine optimum conditions for using activated alumina to remove selenium from drinking water supplies. Column tests showed that the capacity of alumina for Se IV decreased as influent pH increased. Best removal of Se IV occurred at pH 5 where 1200 bed volumes of water, with influent concentration of 0.2 …
Recent advances in technologies for removal and recovery of selenium
Selenium (Se) is distributed into different environmental compartments by natural and anthropogenic activities, and generally discharged in the form of selenate [S e O 4 2 −] and selenite [S e O 3 2 −], which are both toxic.Physical-chemical and biological treatment processes have been reported to exhibit good treatment efficiencies for Se …
Methods for selenium removal from contaminated waters: a …
Methods for selenium removal from contaminated waters: a review. Review. Published: 28 March 2022. Volume 20, pages 2019–2041, ( 2022 ) Cite this article. Download PDF. …
Selenium Removal Using a Moving Bed Biofilm Reactor
An MBBR is a biological method to remove selenium that can operate with the same support material for over 20 years, while granulated activated carbon in other biological methods may need to be replaced regularly. The MBBR does not require back-washing; it can tolerate high suspended solids concentrations in the feed and is not …
Selenium Removal from Industrial Wastewater
View Image Gallery. A critical issue at coal-fired power plants — those remaining and many of those that have shut down — is …
Novel CTAB functionalized graphene oxide for selenium removal
This study explored the potential of cetyltrimethylammonium bromide functionalized graphene oxide (CTAB@GO composite) to remove selenite and selenate from wastewater, given the health hazards related to selenium. It demonstrated outstanding adsorption capacities of 140 and 468 mg/g for selenite and selenate …
Chemical Methods for Removal and Treatment of Selenium …
Hence removal of selenium from water is a matter of emergent concern. Selenium can be removed from drinking water by using different techniques such as …
Selenium Removal from Water and Wastewater by Different …
This study provides a review of the recent literature covering the period between 2011 and 2021. After screening the full text of the articles, 27 papers were enrolled. This study reviews the reported techniques for Se removal from water and wastewater, including adsorption, biological treatment, microbial reduction, bioreactors, fungal ...
Technologies to Remove Selenium from Water and Wastewater
To remove selenium, recent data from constructed wetlands showed that phytoremediation appears attractive due to its field scale application advantage (Gebreeyessus and Zewge 2019). Flow-through or subsurface wetlands provide an inexpensive and efficient technology for the treatment of selenium in large volume of …
Selenium removal from mining and process wastewater: a …
The removal of selenium from water is complex, determined by its speciation and often expensive due to the characteristics of the wastewater and the stringent discharge limits for selenium and its oxyanions. In this review, selenium chemistry and its toxic effects on human health and the environment have been …
Selenium Removal from Water and Wastewater by Different …
This study reviews the reported techniques for Se removal from water and wastewater, including adsorption, biological treatment, microbial reduction, bioreactors, …
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