Conversion of metal oxidation states by phytoreduction

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

210602, 405128, 423DIG17, 588256, C21B 318

Patent

active

059284064

ABSTRACT:
The present invention provides a method for remediating soil contaminated with Cr(VI) by reducing the Cr(VI) to Cr(III) in the soil. The method involves contacting the contaminated soil with a plant that accomplishes the reduction. Removal of the plant from the environment is not required; in fact, preferred embodiments of the invention involve plowing the plant back into the soil environment and replanting the soil.

REFERENCES:
patent: 3728254 (1973-04-01), Carothers
patent: 4293333 (1981-10-01), Drobot
patent: 4293334 (1981-10-01), Drobot et al.
patent: 4310990 (1982-01-01), Payne
patent: 4333837 (1982-06-01), Plosz et al.
patent: 4678582 (1987-07-01), LaVigne
patent: 4732681 (1988-03-01), Galun et al.
patent: 4839051 (1989-06-01), Higa
patent: 4872985 (1989-10-01), Dinges
patent: 4904386 (1990-02-01), Kickuth
patent: 4959084 (1990-09-01), Wolverton et al.
patent: 4992207 (1991-02-01), Darnall et al.
patent: 4995969 (1991-02-01), LaVigne
patent: 5000852 (1991-03-01), Tel-Or et al.
patent: 5099049 (1992-03-01), Chamberlain
patent: 5100455 (1992-03-01), Pinckard et al.
patent: 5106504 (1992-04-01), Murray
patent: 5120441 (1992-06-01), Jackson et al.
patent: 5121708 (1992-06-01), Nuttle
patent: 5129936 (1992-07-01), Wilson
patent: 5156741 (1992-10-01), Morrison et al.
patent: 5269094 (1993-12-01), Wolverton et al.
patent: 5292456 (1994-03-01), Francis et al.
patent: 5320663 (1994-06-01), Cunningham
patent: 5337516 (1994-08-01), Hondulas
patent: 5364451 (1994-11-01), Raskin et al.
patent: 5393426 (1995-02-01), Raskin et al.
patent: 5422268 (1995-06-01), Rusin
patent: 5436384 (1995-07-01), Grant et al.
patent: 5458747 (1995-10-01), Marks et al.
patent: 5562588 (1996-10-01), Higgins
Baker et al., "The potential for the use of metal-accumulating plants for the in situ decontamination of metal-polluted soils", Proc. Eurosol Conference, (European Conference on Integrated Research for Soil and Sediment Protection and Remediation, MECC Maastricht, The Netherlands), pp. 6-12, Sep. 1992.
Baker et al., "Terrestrial higher plants which hyperaccumulate metallic elements- a review of their distribution, ecology and phytochemsitry", Biorecovery 1:81, 1989.
Baker et al., "In situ decontaimination of heavy metal polluted soils using crops of metal-accumulating plants- a feasibility study", in in Situ Bioreclamation (Hinchee et al., eds), Butterworth- Heinenmann, Stoneham, MA, pp. 600-605, 1991.
Boon et al., "Lead, Cadmium, and zinc contamination of Aspen garden soils and vegetation", Plant Nutr. 116:773, 1992.
Brooks et al., Chapter 4 in Biological Methods of Prospecting for Minerals, John Wiley, NY, pp. 31-49, 1983.
Chatterjee et al., "Agronomy", Chapter 6 in Oilseed Brassicas in Indian Culture, Vikas Publishing House, New Delhi, pp. 139-159, 1991.
Dushenkov et al., "Phytoremediation potential of crop plants", Supp. Plant Physiol. 105(1):43 (Ab. 185), May 1994 (Abstracts of papers presented at Ann. Mtg. of Am. Soc. Plant Physiologist, Portland, OR, Jul. 30-AUg. 3, 1994).
Keefer et al., "Chemical composition of vegetables grown on an agricultural soil amended with sewage sledges", Biol. Abstr., 82(1):AB-1068, Jul. 1986 (related article published Apr., 1986).
Kumar et al., "Phytoextraction: The use of plants to remove heavy metals from soils", Environ. Sci. Technol. 29:1232-1238, May 1995.
McGrath et al., "The potential for the use of metal-accumulating plants for the in situ decontamination of metal-polluted soils", Integrated Soil and Sediment Research: A Basis for Proper Protection, (Ejackers et al., eds), Kluwer Academic Publishers, Netherlands, pp. 673-676, 1993.
Probsten et al., "Removal of contaminants from soils by electric fields", Science 260:498, Apr. 1993.
Raskin et al., "Bioconcentration of heavy metals by plants", Curr. Op. Biotechnol. 5:285-290, 1994.
Raymer et al., "Agronomy of Canola in the United States", in Canada and Rapeseed: Production, Chemistry, Nutrition and Processing Technology (Shahidi, ed), Van Nostrand Reinhold, NY, pp. 25-35, 1990.
Scientific Program for Ann. Mtg. of Am. Soc. Plant Physiologists, Portland, OR, Jul. 30-Aug. 3, 1994 in Suppl. Plant Physiol 105(1):3-6, May 1994.
Stomp et al., "Genetic Strategies for Enhancing Phytoremediation", in Annals of the NY Acad. Sci, vol. 721 (Bajpai et al., eds), 1994, pp. 481-491, as presented at Recombinant DNA Technology 11 Conference, Palm Coast, Florida, Jna. 31 -Feb. 3, 1993.
Thomas et al., Canola Growers Manual, Canola Counsel of Canada, 1984.
Yusuf et al., "Effect of several production factors on two varieties of rapeseed in the central United States", J. Plant. Nut. 16(7), pp. 1279-1288, 1993.
Bender et al., "Lead removal from contaminated water by a mixed microbial ecosystem", Wat. Sci. Tech. 21:1661-1664, 1989.
Berti et al., "Remediating soil Pb with green plants", presented at the Intl. Conf. of the Soc. for Env. Geochem. and Health, New Orleans, LA, Jul. 25-27, 1993 (pub'd Sep. 1993).
Cataldo et al., "Cadmium distribution and chemical fate in soybean plants", Plant Physiol. 68:835-839, 1981, Apr.
Checkai et al., "Effects of ionic and complexed metal concentrations on plant uptake of cadmium and micronutrient metals from solution", Plant and Soil, 99:335-345, 1987.
Chigbo et al., "Uptake of arsenic, cadmuim, lead and mercury from polluted waters by the water hyacinth eichhornia crassipes", Environ. Poll. A:31-36, 1982.
Conley et al., "An assessment of the root zone method of wastewater treatment", J. Water. Poll. Control. Fed. 63:239-247, 1991, May.
Crowley, "Mechanisms of iron acquisition from siderophoers by microorganisms and plants", Plant and Soil, 130:179-198, 1991.
Dierberg et al., "Removal of copper and lead using a thin-film technique", Aquatic Plants for Water Treatnebt and Resource Recovery, Magnolia Publishing (eds. Reddy and Smith), pp. 407-504, 1987.
Elad et al., "Possible role of competition for nutrients in biocontrol of phythium damping-off by bacteria", Ecol. Epidermoil., 1987. Phytopathology 77 pp. 190-195.
Haider et al., "Pollutin control . . . ", Un Environ. Prog., 1984, pp. 627-634.
Halvorson et al., "The critical ZN.sup.2+ concentration for corn and nonabsroption of chelated zinc", Soil Soc. A.M. J., 41:531-534, 1977.
Heaton et al., "Lead uptake by the water hyacinth", Aquatic plants for water treatment and resource recovery, Magnolia Publishing, Inc., pp. 471-485, 1986.
Heaton et al., "Lead uptake by eichhornia crassipes", Toxicol. Env. Chem. 11:125-135, 1986.
Heubert et al., "The effect of EDTA on cadmium and zinc uptake and toxicity in Lemna trisulco L", Arch. Environ. Contam. Toxicol., 22:313-318, 1992.
Jamil et al., "Biotransfer of metals to the insect neochetina eichhornae via aquatic plants", Arch. Envir. Contam. Toxicol. 22:459-63, 1992.
Jewell, "Resource-recovery wastewater treatment", Am. Scientist. 82:366, 1994.
Jorgensen, "Removal of heavy metals from compost and soil by ecotechnological methods", Ecological Engineering, 2:89-100. 1993. Feb.
Kay et al., "Effects of heavy metals on water hyacinths (eichhornia crasspies (Mart.) Solms)", Aquatic Toxicol., 5:117-128, 1984.
Kumar et al., "Phytoextraction: the use of plants to remove heavy metals from soils", Environ. Sci. Technol., 29:1232, 1995.
Lee et al., "Copper uptake by the water hyacinth", J. Environ. Sci. Health, A22:141-160, 1987.
Muramoto et al., "Removal of some heavy metals from polluted water by the water hyacinth (eichhornia crasspies)", Bull Envir. Contam. Toxicol. 30:170-177, 1983.
Okieimen et al., "Removal of heavy ions from aqueous solution with melon (citrullus vulgaris) seed husks", Biological Wastes, :0269-7483, 1989.
Ordentich et al., "Rhizosphere Colonization by serratia morcescers for the control of sclerotium rolfsii", Soil, Biol. Biochem., 19:747-751, 1987.
Salt et al., "Phytoremediation: a new technology for the environmental cleanup of toxic metals", presented at the 33rd Ann. Conf. of Metalluirgists: Advances in Material Production, Performance, and Stewardship, Toronto, Ont., Aug. 20-24, 1994.
Sunda et al., "Feedback interactions between zinc and phytoplankton in seawater", Limmol. Oceanog., 37:25-40, 19

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Conversion of metal oxidation states by phytoreduction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Conversion of metal oxidation states by phytoreduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conversion of metal oxidation states by phytoreduction will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-874423

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.