| 摘要 |
The water filtration system according to the present invention includes a containment vessel(s) in which a filtration matrix is contained. The filtration matrix comprises a plurality of particles on which a regenerative membrane is formed directly on the surface. Through extensive experimentation, it has been found that the conditions suitable for reducing iron and manganese from water entering the vessel can be performed simply by controlling the amount of Fe3+ and pH in raw water entering the containment vessel. This is true even though the chemical characteristics of the underground water are changing. In one embodiment, the matrix comprises a plurality of polymeric particles selected from particles having specific gravity ranging from about 1.4 to about 2.7. Further, the particles have a nonuniformity coefficient no greater than about 2, and an average particle diameter ranging from about 1.0 mm to about 1.6 mm. The membrane formed on the particles is a product of reaction between oxygen and an impurity selected from Fe2+ and manganese. Preferably, the membrane comprises iron oxyhydroxide (FeO(OH)).
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