Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1994-01-14
1995-09-26
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210669, 210679, 210683, C02F 142
Patent
active
054532019
ABSTRACT:
A water or wastewater purification process is described for reducing selenium and arsenic concentrations in contaminated water or wastewater streams. Iron loaded cation exchange resins, when contacted with contaminated water or wastewater streams are effective to form immobilized complexes with selenite and arsenate contaminants. The iron loaded resins can be easily regenerated by sequential treatment with acid and a solution of a soluble iron salt.
REFERENCES:
patent: 3984313 (1976-10-01), Higgins
patent: 4915928 (1990-04-01), Marcantonio
"Selenium Oxidation and Removal by Ion Exchange", Boegel, et al, Dept. Civil Engineering, Houston University, Houston, Texas USA, 1986, No. EPA/600/2-86/031.
"Selective Collection Of Selenium (IV) From Environmental Water By Functionalized Ion-Exchange Resin", Tanaka, et al., Stud. Environ. Sci., vol. 23, pp. 365-372.
"In Situ Reduction Of ion Exchange Resins As A Method For Preconcentration Of Selenium And Other Heavy Metals From Aqueous Solutions", Bernier, et al., Trace Subs. Environ. Health, vol. 10, 1976, pp. 323-331.
"Communication: A Water Treatment Process For Selenium Removal", A. P. Murphy, Journal WPCF, vol. 61, No. 3, pp. 361-362.
"Characterization, Development And Use Of New Breed On Anion-Exchange Resins For Selective Removal Of Cr(VI) And Other Toxic Anions", Sengupta, et al, Resin Technology, 42nd PIWC, 1987.
Etzel James E.
Kurek Joseph
Cintins Ivars
Heritage Environmental Servcies, Inc.
LandOfFree
Water treatment process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water treatment process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water treatment process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1550545