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UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

e study, which was conducted in 2003-2005. The California State Water Resources Control Board and the Salton Sea Authority provided financial support.

Details of the study:
Phosphorus is contributed to the Salton Sea in both colloidal and dissolved forms. Alum and polyacrylamide are commonly used in municipal wastewater treatment to remove phosphorus and solids, and then the sludge is collected and disposed.

Alum, or aluminum sulfate, is the most widely used coagulant in water treatment. It forms solid amorphous aluminum hydroxide in water, which incorporates soluble phosphorus into its structure. The amorphous aluminum hydroxide, or "floc," combines with the other coagulated suspended solids and settles out.

Polyacrylamide is a synthetic polymer used in soil applications to reduce erosion, promote flocculation (the process by which clays, polymers, or other small charged particles become attached and form a fragile structure, called a floc) and enhance salt removal. Used in wastewater treatment, it enhances coagulation and settling. The polymer acts as a coagulant aid by chemically bridging reactive groups and increasing floc size.


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Source:University of California - Riverside


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