Hardness levels are important: A. because the minerals can be toxic to organisms in low quantities B. in agricultural water use for irrigation C. because the minerals can biomagnify D. because they impact domestic water use E. characteristics for aquatic ecosystems
Two major factors involved in the conversion of primary pollutants into secondary pollutants are: A. nitrogen oxides and sulfates B. sulfur dioxide and sunlight C. sunlight and water vapor D. water vapor and volatile organics E. sulfur dioxide and sulfuric acid
2 points Save Ansv The most efficient method for removing soluble organic material from waste water is: A. a flow through rectangular tank with many air jets and a circulating microbial population B. a large circular tank where chemicals are added to make a fluffy floc C. large spray arms which distribute wastewater over rocks or steps covered in microbial slime D. a large shallow pond with a microbe population on the bottom E. a large circular tank with a rotating paddle wheel which is covered in microbes
Hardness levels are important: A. because the minerals can be toxic to organisms in low quantities B. in agricultural wa
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Hardness levels are important: A. because the minerals can be toxic to organisms in low quantities B. in agricultural wa
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