Record Display for the EPA National Library Catalog


Main Title Removal of Color from the Water of Waikoloa Stream South Kohala District, Island of Hawaii.
Author Burbank, Jr, Nathan C. ; Cha, Po Lau ; Youn, Reginald H. F. ;
CORP Author Hawaii Univ., Honolulu. Water Resources Research Center.
Year Published 1970
Report Number TR-38; OWRR-A-999-HI; 02884,; A-999-HI(5)
Stock Number PB-196 359
Additional Subjects ( Water pollution ; Organic compounds) ; ( Coagulation ; Water pollution) ; ( Water treatment ; Stream pollution) ; Surface waters ; Zeta potential ; Color ; Water quality ; Coagulation ; Iron sulfate ; Polymers ; Polyelectrolytes ; Silicon dioxide ; Aluminum sulfate ; Hawaii ; Waikola Stream
Library Call Number Additional Info Location Last
NTIS  PB-196 359 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 25p
The waters of the streams in the South Kohala District on the island of Hawaii have long been noted for their extreme high color and at times a distinct peaty taste. The colored bodies have been found to be predominantly organic in origin with the color colloid having a negative charge. It was possible to remove color for interstate carriers by coagulating the color bodies with either alum or ferric sulfate. Coagulant aids can significantly reduced the quantity of the coagulant required to effect color removal. Coagulant aids decrease the required retention time in the flocculation basin and effects a faster rate of sedimentation. The most satisfactory coagulant aid is a cationic polymer, which not only acts as an aid but also as a true coagulant in color removal. Reductions by as much as 20 percent in the amount of primary coagulant required is possible while obtaining the same results. (Author)