Compositions and method for removing impurities from a fluid stream

A product for dosing into a contaminated water flow for the removal of organic and/or inorganic contamination, comprising an anhydrous liquid into which is dispersed and not dissolved:

• a. a powdered, water soluble anionic polysaccharide or a mixture of anionic polysaccharides of one or more of Agar, Guar gum, Dextran, Carboxy Methyl cellulose, Alginates, Gum Arabic, Gellan gum, Methyl Hydroxypropyl cellulose, Carrageenan Gum Tragacanth, Rhamsan gum, Hydroxypropylcellulose, Furcellaran, Karaya gum, Whelan gum, Hydroxyethyl cellulose, Locust bean gum, Xanthan gum, Propylene Glycol Alginate, Pectin, Curdlan, Hydroxypropyl Guar, Tamarind seed gum and/or Pulluan, where the polysaccharide or polysaccharides are of the type that when dissolved in water are capable of crosslinking with multivalent cations, and
• b. one or more powdered, water soluble multivalent cations, said multivalent cations capable of cross linking with the polysaccharide when the polysaccharide is dissolved in water,
• c. wherein the polysaccharide and the multivalent cations are dispersed together into, but not dissolved in, the anhydrous liquid, and,
• d. further where the anhydrous liquid is in the form of a non-polar organic oil or mineral oil or synthetic oil immiscible with water, or where the anhydrous liquid is an alcohol.