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A selenium removal efficiency of 92% was achieved in a bioreactor with initial biomass of 2.2×106 cells/g AIAA after a 70-day operation period. Little improvement was observed by lowering the influent Se(VI) concentration from 50 to 10 mg/L, while the removal efficiency was significantly enhanced by either extending the HRT from 3.2 to 5.0 ...
Semantic Scholar extracted view of "Effect of temperature on selenium removal from wastewater by UASB reactors." by P. Dessì et al. Skip to search form Skip to main ... Anaerobic granular sludge coupled with artificial aeration or Fe-based substrate enhanced nitrogen conversion dynamic based on CW-MFCs. Jun-Feng Wang Cong …
S. Zou, M. Mauter. Published 26 January 2021. Environmental Science, Chemistry. ACS Sustainable Chemistry & Engineering. Direct electrochemical reduction provides a novel strategy for selenium removal from complex wastewaters. While electrochemical Se (IV) reduction is thermodynamically favorable, anion structure reor... View via Publisher.
The enhanced reactivity stems from Fe introduction and the increased selenium vacancy in Fe-CoSe-HT atomic layers that optimizes the adsorption energy of the critical *OOH intermediates. Moreover, Fe-CoSe-HT exhibits good stability and versatile applicability the regeneration of Fe 2+ in the flow-Fenton system. RhB removal …
ABMet* for selenium removal from water & wastewater. 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 ...
Arsenic, Selenium, and Sulfate Removal using an Ethanol-Enhanced Sulfate-Reducing Bioreactor Qian Luo Æ T. K. Tsukamoto Æ K. L. Zamzow Æ G. C. Miller Received: 27 August 2007/Accepted: 31 December 2007/Published online: 15 February 2008 Springer-Verlag 2008 Abstract A laboratory scale sulfate-reducing bioreactor
Iron and manganese bimetallic microparticles were effectively created to remove more than 95% of selenium from water under the ideal conditions of pH- 8.5, 25 mg of adsorbent, 60 min of contact ...
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 ...
Biological Removal of Selenate and Selenite from Wastewater: Options for Selenium Recovery as Nanoparticles. Water Pollution (G Toor and L Nghiem, Section …
A laboratory scale sulfate-reducing bioreactor column study was used to investigate removal of arsenic, selenium, and sulfate in neutral to alkaline simulated mine water. Selenium was effectively removed as insoluble elemental selenium from 200 μg/L to below the maximum contaminant level (50 μg/L). With the addition of ferrous chloride in …
The mechanism study illustrates that the enhanced selenium removal by PAA-MGO is attributed to dual interactions including ligand exchange between surface hydroxyl group of iron oxide and Se ...
In this context, in the last decade, only several studies regarding selenium's removal from aqueous solutions have been conducted. Therefore, in the present study, we aim to use the sol–gel synthesis method to prepare a nanocomposite adsorbent material starting from sodium fluoride, silica, and iron oxide matrices (SiO2/Fe(acac)3/NaF), and ...
The effective removal of inorganic selenium species was noted to occur in the acidic conditions with optimal pH ranging between 4.0 – 5.5. Adsorption of inorganic selenium could be enhanced under neutral pH conditions by the stoichiometric addition of ferrous salts along with ferric chloride.
DOI: 10.1016/j.chemosphere.2016.12.132 Corpus ID: 23291363; Desulfurization: Critical step towards enhanced selenium removal from industrial effluents. @article{Staicu2017DesulfurizationCS, title={Desulfurization: Critical step towards enhanced selenium removal from industrial effluents.}, author={Lucian C. Staicu and …
It has been demonstrated that ZVI can effectively remove selenium from water through a combination of adsorption, surface complexation, and reduction processes [[9], [10], [11]]. Nanoscale zero-valent iron (NZVI) as one of the most effective ways has been used to further enhance the removal of selenium, owing to its elevated specific …
1. Introduction. Selenium (Se: atomic number 34) is an ubiquitous element ranking 69th in abundance in the earth's crust and is considered to be both an essential, and a potentially toxic, element dependent on its concentration in water (Janz, 2011, Pommier et al., 2019).For example, Se is an essential micronutrient for vegetation and …
To develop an improved biological treatment process for selenium-enriched wastewater, Nancharaiah et al. (2018) investigated the simultaneous removal of Se (IV) and ammonium by an aerobic granular sludge reactor operated in a filling and …
The purpose of this review is to summarize the literature available on biological removal of selenium oxyanions and their recovery as elemental selenium nanoparticles. ... Sinharoy A, Pakshirajan K. A novel application of biologically synthesized nanoparticles for enhanced biohydrogen production and carbon monoxide …
Selenium removal methods are classified into three categories: chemical, biological and physical technologies (Fig. 3.1, Koren et al. 1992; ... 3.5.6 Remediation of Solutions Containing Selenium by Chitosan-Enhanced Ultrafiltration.
The use of polymers such as chitosan and polyethyleneimine, which are rich in amine and alcoholic functional groups, provided enhanced removal of anionic selenium species from the water.
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. It utilizes an enhanced adsorptive matrix and process adjustments along with conventional wastewater treatment equipment such as …
Removal of selenium from river water by a microbial community enhanced with Enterobacter taylorae in organic carbon coated sand columns Sci Total Environ. 2005 Jun 15;346 (1-3):280-5 ... Discovering an effective means to remove selenium (Se) from Se-contaminated water is fundamental in minimizing environmental contamination and …
10.1016/j.jenvman.2021.112926. Selenium (Se) is distributed into different environmental compartments by natural and anthropogenic activities, and generally discharged in the …
Selenium was further removed from 499 μg L −1 to 270 μg L −1, leading to an overall 80% removal. A higher Se removal could not potentially be accomplished …
In this study, an alum-impregnated activated alumina packed bioreactor cultured with Shigella fergusonii strain TB42616 was applied in order to remove Se( IV) during Se(VI) reduction, indicating that Se(IV) removal was enhanced by the adsorption of the alum- impregnated activation alumina. Selenium is a primary pollutant that brings a …
SeNPs are more effective than traditional selenium form in synthesizing selenoproteins like glutathione peroxidases. SeNPs can reshape the digestive system to facilitate digestion and absorption of nutrients. SeNPs have shown excellent potential to adjunctively treat cancer patients, enhance immune system, control diabetes, and prevent ...
Selenium is by now a well-known pollutant, present in various coal and hard-rock mines and some thermal power plant effluents through the world. Veolia has developed the Tracer Se process (patent pending), which is a new method for selenium removal based on biological reduction of selenium to selenite, its subsequent removal from …
Selenium (Se) removal from synthetic solutions and from real Flue Gas Desulfurization (FGD) wastewater generated by a coal-fired power plant was studied for the first time using a commercial iron oxide impregnated strong base anion exchange resin, Purolite ® FerrIX A33E. In synthetic solutions, the resin showed high affinity for selenate …
The Se removal efficacy can be enhanced by: (i) reorienting the future research focus towards novel techniques effective specifically towards overcoming the …
Selenium (Se) is a dissolved oxyanion drinking water contaminant requiring appropriate removal technologies. The removal of selenite (Se IV) and selenite (Se VI) with nanofiltration (NF) was investigated with an emphasis on the role of Se speciation and membrane charge screening on the retention mechanisms.The pH (2 to 12) showed …
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