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, R1 and R2, that are independently a hydrido or a C1-C4 alkyl group, and correspond in structure to the formula A 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.

Abstract: A process for removing fluoride ions from a fluoride ion-contaminated aqueous solution and an apparatus useful for carrying out that process, both of which utilize modified alumina particles are disclosed. The modified alumina particles contain alumina complexed with iron or manganese, or both.

Abstract: A water treatment system for use in situations where power means, such as electricity, are either non-existent, too expensive or temporarily unavailable, for example due to catastrophic circumstances, is provided. The system includes means to create pressure that drives raw water through preselected treatment media so as to purify and filter water, particularly brackish water, so that it is made potable. The system includes the use of physical and chemical treatment means, including carbon, reverse osmosis and anti-microbial media.

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, R1 and R2, that are independently a hydrido or a C1-C4 alkyl group, and correspond in structure to the formula A 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.