Document Type

Report

Publication Date

January 1979

Abstract

The effects of oil shale leachate and salinity additions on the productivity of freshwater algae were studied in the laboratory using batch bioassays. These batch bioassays were used to screen variations of ten salts in single and multiple additions of all possible combinations of the ten salts; water extractions of different processed and unprocessed oil shales; and the concentration effects of both the salts from 0.3 N to 0.05 N as NaCl and the oil shale extractions on the growth of standard test algae and indigenous algae from Lake Powell. The batch bottle bioassays were conducted following the standard algal assay procedure as closely as possible. Variations in the standard algal assay procedure included media variation with the use of indigenous algal species isolated from Lake Powell and the use of three different algal species isolated from Lake Powell and the use of three different algal species for test innoculum in the bioassay procedure. The biomass was monitored using optical density, chlorophyll a fluorescence, and/or cell counts. The indegenous algal species were found to be negatively affected but more tolerant to all salinity additions than the standard test alga. The growth of the indigenous algal species (