Oxidation of heavy metal ions

Details Oxidation of heavy metal ions Oxidation of heavy metal ions

2007-11-27

2007-11-27

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S688000

Reexamination Certificate

active

11713878

ABSTRACT:
A water-insoluble polymeric oxidizing medium is contemplated that has a plurality of polymerized N-pyridinium vinylbenzyl triiodide or tribromide moieties whose pyridinium rings bear two substituents, R1and R2, that are independently a hydrido or a C1-C4alkyl group, and correspond in structure to the formulaA process for preparing aseptic water and an apparatus useful for carrying out that process, both of which utilize a contemplated polymeric oxidizing medium are disclosed, as are processes for oxidizing trivalent arsenic or antimony to pentavalent arsenic or antimony and for removing arsenic from water. Alumina particles containing meta-periodate, iron or manganese are also disclosed that can be used to sorb pentavalent arsenic and antimony, as well as cobalt and mercury.

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