Metal finishing industry sedimentation

A study of an operational waste treatment facility that chemically reduces hexavalent chromium has shown mat 99.7% reduction efficiency is easily achieved (Appendix A2). Final concentrations of 0.05 mg/L are readily attained, and concentrations of 0.01 mg/L are considered to be attainable by properly maintained and operated equipment. Condnct a literature search, showing how chemical reduction, sedimentation, and/or filtration togemer can effectively treat the industrial effluents from me mdnstrial operations of metal finishing, aluminum forming, and inorganic chemicals mannfactnring. 

Salts of alkyl phosphates and types of other surfactants used as emulsifiers and dispersing agents in polymer dispersions are discussed with respect to the preparation of polymer dispersions for use in the manufactoring and finishing of textiles. Seven examples are presented to demonstrate the significance of surfactants on the properties, e.g., sedimentation, wetting behavior, hydrophilic characteristics, foaming behavior, metal adhesion, and viscosity, of polymer dispersions used in the textile industry [239]. 

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