Biomaterial Database

Mitigating uranium in groundwater: prospects and limitations. 2003

C Noubactep, and G Meinrath, and P Dietrich, and B Merkel

Centre of Geosciences-Applied Geology, Goldschmidtstrasse 3, D-37077 Göttingen, Germany. cnoubac@gwdg.de

Removal of uranium(VI) by zerovalent iron has been suggested as a feasible pathway to control uranium contaminations in seepage waters. Available information in the literature however presents discrepant evidence on the process responsible for the mitigation effect. On basis of an EH-pH diagram of uranium and iron, it is outlined that these discrepancies may be explained by the aqueous chemistry of uranium and iron. Additional effects contributing to the complexity of the system are given. Solubilization experiments using scrap iron together with water works sludge, MnO2, and pyrite indicate that U(VI) is immobilized by iron corrosion products after about 50 days.

UI	MeSH Term	Description	Entries
D007501	Iron	A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.	Iron-56,Iron 56
D010087	Oxides	Binary compounds of oxygen containing the anion O(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides.	Oxide
D012995	Solubility	The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Solubilities
D013440	Sulfides	Chemical groups containing the covalent sulfur bonds -S-. The sulfur atom can be bound to inorganic or organic moieties.	Sulfide,Thioether,Thioethers,Sulfur Ethers,Ethers, Sulfur
D014501	Uranium	A radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors.
D014875	Water Pollutants, Radioactive	Pollutants, present in water or bodies of water, which exhibit radioactivity.	Pollutants, Radioactive Water,Radioactive Water Pollutants
D014876	Water Pollution	Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)	Thermal Water Pollution,Water Pollution, Thermal,Pollution, Thermal Water,Pollution, Water,Pollutions, Thermal Water,Pollutions, Water,Thermal Water Pollutions,Water Pollutions,Water Pollutions, Thermal
D017895	Manganese Compounds	Inorganic chemicals that contain manganese as an integral part of the molecule.	Compounds, Manganese