Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2006-05-13
2009-02-17
Barry, Chester T (Department: 1797)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S661000, C210S663000, C210S669000, C210S688000
Reexamination Certificate
active
07491335
ABSTRACT:
The current invention is concerned with methods and compositions for the removal of arsenic contamination from water. A method for binding As to oxidized metal coated pumice and method for making the same are disclosed. Water filters comprising oxidized metal coated pumice, such as oxidized iron coated pumice, are also provided.
REFERENCES:
patent: 3567772 (1971-03-01), Yanagita
patent: 3933624 (1976-01-01), Myers
patent: 3966822 (1976-06-01), Fukui et al.
patent: 4219682 (1980-08-01), Stapp
patent: 4233180 (1980-11-01), Hausberger et al.
patent: 4719006 (1988-01-01), Goyal
patent: 5037560 (1991-08-01), Gayman
patent: D451602 (2001-12-01), Juhlin et al.
patent: 6328777 (2001-12-01), Benthaus et al.
patent: 6383395 (2002-05-01), Clarke et al.
patent: 6779411 (2004-08-01), Spurgeon
patent: 6841066 (2005-01-01), Nurse et al.
patent: 6843912 (2005-01-01), Chaney et al.
patent: D501912 (2005-02-01), Tanner et al.
patent: 6852224 (2005-02-01), Jagtoyen et al.
patent: 6863825 (2005-03-01), Witham et al.
patent: 6872303 (2005-03-01), Knapp et al.
patent: 7291578 (2007-11-01), SenGupta et al.
patent: 2004/0262225 (2004-12-01), C. et al.
patent: 2005/0288181 (2005-12-01), Tranter et al.
patent: 2006/0151395 (2006-07-01), Gavaskar et al.
patent: 2007/0160566 (2007-07-01), Smith et al.
patent: 58114728 (1983-07-01), None
patent: 63182398 (1988-07-01), None
patent: 2001025753 (2001-01-01), None
Abernathy et al., “Arsenic: Health Effects, Mechanisms of Actions, and Research Issues,”Environ. Health Perspect., 107(7):593-597, 1999.
Adeel and Ali, In:A Comparative Evaluation and Field Implementation of Treatment Technologies for Arsenic Removal from Groundwater, Proc. Intl. Workshop Arsenic Mitigation in Bangladesh, Rural Dev. Coop., Bangladesh, 1-11, 2002.
Ali et al., “Development of low-cost technologies for removal of arsenic from groundwater,” BUET-UNU International Workshop on Technologies for Arsenic Removal From Drinking Water, 99-120, 2001.
Driehaus et al., “Granular ferric hydroxideN a new absorbent for the removal of arsenic from natural water,”J. of Water Services Res. Tech., 47(1):30-35, 1998.
Emett and Khoe, “Photochemical oxidation of arsenic by oxygen and iron in acidic solutions,”Water Res., 35(3):649-656, 2001.
Ford, “Laboratory study of the attenuation of arsenic by iron (hydr)oxides in soils/sediments,” 2003.
Johnston and Heijnen, “Safe water technology for arsenic removal,” BUET-UNU International Workshop on Technologies for Arsenic Removal From Drinking Water, 1-22, 2001.
Joshi and Chaudhuri, “Removal of Arsenic from Ground Water by Iron Oxide-Coated Sand,”J. Environ. Eng., 769-771, 1996.
Kam et al., “Removal of heavy metals in wastewater by zeolites synthesized from cheju scoria of Korea,”Nippon Mizu Kankyo Gakki Nenkai Koenshu, 34:470, 2000.
Minja and Ebina, “Arsenic adsorption capabilities of soil-bentonite mixtures as buffer materials for landfills,”Clay Science, 12:41-47, 2002.
Pang et al., “Adsorption and transport of cadmium and rhodamine WT in pumice sand columns,”New Zealand Journal of Marine and Freshwater Research, 38:367-378, 2004.
Ramaswami et al., “Batch-Mixed Iron Treatment of High Arsenic Waters,”Water Research, 35(18):4474-4479, 2001.
Thirunavukkarasu et al., “Arsenic removal from drinking water using granular ferric hydroxide,”Water research Commisin Rep. of South Africa. 29:161-170, 2003.
Reddy Pratap G.
Turner Charles D.
Barry Chester T
Fulbright & Jaworski LLP
The Board of Regents of the University of Texas System
LandOfFree
Removal of arsenic from water with oxidized metal coated pumice does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removal of arsenic from water with oxidized metal coated pumice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removal of arsenic from water with oxidized metal coated pumice will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4133427