Patent ID: 6716366
Filing Date: 2004-04-06
Classification: C02F,Y10S

Abstract:
An improved composition for nitrate removal and for the treatment of waste water streams, without pH adjustment, comprising: (1) a first component selected from the group consisting of clay absorbents, absorbent-adsorbent products, and organic modified clays and (2) a second component selected from the group consisting of:a. highly insoluble crosslinked carbohydrate polymers with a branched-chain structure containing a moiety selected from the group consisting of sulfides, disulfides, sulfonates, and sulfates; b. crosslinked starch xanthates; c. xanthates; d. starch xanthate-xanthides; e. a sulfur containing compound selected from the group consisting of 3-mercaptopropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, starch xanthate Sulfamic acid adduct, dithiocarbonic acid, dithiocarbonic acid combined with 3-mercaptopropyltrimethoxysilane, dithiocarbonic acid combined with 3-mercaptopropylmethyldimethoxysilane, xanthate combined with 3-mercaptopropyltrimethoxysilane, xanthate combined with 3-mercaptopropylmethyldimethoxysilane, and trisodium salt of 1,3,5-Triazine-2,4,6-(1H,3H,5H)-trithione; and f. regenerated cellulose (Ground viscose); wherein said composition is in a solid form selected from the group consisting of granules and pellets; and wherein said composition is used to treat waters without any need to adjust pH.