ABSTRACT
An Acute and chronic toxicity tests have been performed in the laboratory with linear primary, linear secondary and branched AE using fish, daphnids, oysters, shrimp, crabs, freshwater algae, and aquatic macrophytes. Both the acute toxicity and chronic no-effect values, based on single chemical testing, are greater than detected concentrations of the same or related chemicals in environmental media, but are lower than environmental concentrations for total nonionics measured by chemical non-specific methods. Chronic toxicity tests for invertebrates and fish typically last 21 days and several months, respectively. Several investigators monitored the acute toxicity of effluents from laboratory-scale biodegradation units to fish. The effluents from laboratory-scale biotreater units were tested for acute toxicity to aquatic organisms. Although the concept of toxicity is difficult to apply to algal cultures because of the rapid, often logarithmic, growth following removal to fresh media, several effect parameters is commonly used.
