Removal of selenium from water and wastewater ...

3.3. Removal of selenium (Se) from smelter effluents Selenium is often present in effluents from zinc hydrometallurgy circuits. Various microorganisms have been found to be effective in the reduction of selenium oxyanions to elemental selenium. McCready et al. (1990) studied the removal of selenium …

Treatment of Selenium in Simulated Refinery Effluent Using ...

Figure 1 shows removal of selenium with commercial alumina. Figures 2 and 3 illustrate the effect of pH on the removal of selenium (1.16 ppm and 9.75 ppm) with commercial alumina at pH 2, 6 and 10. Figure 4 shows removal of selenium with lanthanum oxide at 1.3 ppm and 9.9 ppm over a period of 250 minutes at a pH of 6.0.

Chapter 8. Treatment of drainage effluent - fao.org

Request PDF on ResearchGate | On Jul 1, 2018, Patricia Córdoba and others published Flue gas desulfurization effluents: An unexploited selenium resource

WO1996037438A1 - Process for removal of selenium and ...

Effective and reliable treatment is needed to treat selenium (Se) in petroleum refinery effluents to meet water discharge limits established under the Clean Water Act through the National Pollutant Discharge Elimination System. As a byproduct of

Selenium Removal Using a Moving Bed Biofilm Reactor - NC ...

Oct 16, 2007· Effluents of sour water strippers are difficult to treat for selenium removal because of the unpredictable nature and unpredictable quantities of contaminants that are present in the effluents. These contaminants often hinder irreversibly selenium removal processes that use membrane, ion exchange resins or inorganic adsorbents.

New Smopex® Ion Exchange Materials for the Removal of ...

Application of selenium adsorption by alumina may be a problem in gold heap leach effluents because of the presence of dissolved silica and, in some cases, the presence of cyanide. Ferric Oxyhydroxide/ Peat/Resins x x x HW-FIX is a USBM development that shows good promise for selenium (IV) removal. The adsorption is not as effective for ...

Selenium Removal Using a Moving Bed Biofilm Reactor - wef.org

3.3. Removal of selenium (Se) from smelter effluents Selenium is often present in effluents from zinc hydrometallurgy circuits. Various microorganisms have been found to be effective in the reduction of selenium oxyanions to elemental selenium. McCready et al. (1990) studied the removal of selenium …

Selenite reduction and ammoniacal nitrogen removal in an ...

A New Process For Sulfate Removal From Industrial Waters Many industrial wastewaters, particularly those associated with mining and mineral processing, contain high concentrations of sulfate. These concentrations typically exceed the secondary drinking water standard of 250 mg/L and may be subject to discharge limits between 250 and 2000 mg/L.

US20050079114A1 - Selenium removal method - Google Patents

Selenium-laden effluents from oil refineries are polluting San Francisco Bay, California. One environmentally friendly way of cleaning up selenium (Se) from effluents is by plant and microbial Se volatilization using constructed wetlands. Using mesocosms, we investigated the role of biological Se volatilization in a 36-ha constructed wetland located adjacent to San Francisco Bay.

Selenium Removal from Refinery Effluent - JSE Consulting

Jan 17, 2014· Selenium Removal Using a Moving Bed Biofilm Reactor By: Caroline Dale and Barry Liner Caroline Dale is a principal engineer of biological processes at the Cary, N.C., office of Veolia Water Technolo-gies (Paris). Barry Liner is the director of the Water Science and Engineering Center at the Water Environment Federa-tion (Alexandria, Va.).

Treatment of Selenium in Simulated Refinery Effluent Using ...

Apr 10, 1990· Accordingly, it is a general object of the invention to provide a novel ion exchange process for removing selenium from wastewater effluent. It is another object of the invention to provide a novel process for regenerating a fouled ion exchange resin used to remove selenium …

Removal of Selenium from Wastewater using ZVI and …

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 …

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

Treated effluents from flue-gas-desulfurisation (from coal combustion power plants) can contain ppm levels of selenium, ... Since sulfate recovery is generally undesired, this lower selectivity is a beneficial property of Smopex ® materials, as selenium removal will be favoured in feeds containing both selenium and sulfate ions.

Selenium Oxidation and Removal By Ion Exchange - EPA

Industrial Selenium Pollution: ... however, the competition with other anions present in real industrial effluents severely limits the Se removal performance. Chemical treatment has been tested for selenium removal, being mainly founded on the redox change of this element. Various reducing agents (e.g., zero-valent iron and sodium dithionite ...

removal selenium effluents - newpowerbeveren.be

United States Environmental Protection Agency Water Engineering Research Laboratory Cincinnati, OH 45268 Research and Development EPA/600/S2-86/031 May 1986 Project Summary Selenium Oxidation and Removal by Ion Exchange Joan V. Boegel and Dennis A. Clifford Strong-base anion exchange was evaluated as a process for the removal of trace quantities of selenium from ground- water.

APPENDIX 4-V LABORATORY INVESTIGATION OF …

Removal of Selenium from Industrial Effluent Streams. Treated effluents from fluegasdesulfurisation (from coal combustion power plants) can contain ppm levels of selenium, most commonly as selenate, but as much as 1 g l–1 of sulfur in the form of sulfate (5). special attention is paid to the removal of selenium …

Industrial Selenium Pollution: Wastewaters and Physical ...

As a byproduct of petroleum refining processes, effluent containing Se may be produced due to geochemistry of the formations from which petroleum is derived. Pilot-scale constructed wetland treatment systems (CWTSs) were designed and built at Clemson University to evaluate removal of Se from simulated refinery effluent (SRE).

Selenium Removal by Constructed Wetlands: Role of ...

Effective and reliable treatment is needed to treat selenium (Se) in petroleum refinery effluents to meet water discharge limits established under the Clean Water Act through the National Pollutant Discharge Elimination System. As a byproduct of

Treatment of Selenium in Simulated Refinery Effluent Using ...

Apr 04, 2016· The results show that MBBR can be a viable solution for biological selenium removal as well as nitrate removal from FGD and mine effluents. By combining the MBBR with traditional chemical treatment, very low effluent selenium concentrations can be reached.

Start-Up of a Passive Remediation Bioreactor for Sulfate ...

However, biological treatment also includes algal-bacterial treatment processes and wetland systems. Much research has focused on the removal of selenium from drainage effluent. Box 12 describes an example of the basics of an algal-bacterial system for the removal of selenium (SJVDIP, 1999b).