Chemical and toxicological properties of coal fly ash - University of ...

Table 38. The mean concentrations of various chemical constituents measured in adult fathead minnows exposed toextracts from five fly ashes and a control.Fly ashControl kJ2 I3 I8 I7 I2% Extract 0.0in the fathead minnows exposed to the I3 extract was four times greaterthan the level measured in the control fish (Table 38). Green sunfish didnot accumulate A1 frorn 13, but they did accumulate Pb. The concentrationof Pb in the tissues of green sunfish exposed to the I3 extract was twicethat present in the controls. The concentration factor for Pb was greaterthan 25. Neither the concentration of A1 nor of Pb exceeded primary orsecondary drinking water standards in the I3 extract (Table 19). Theresults of the LC-50 determinations gave some indications of a problem withA1 in the I3 extract, because the level of A1 exceeded the recommendedlevel for the protection of aquatic life (Table 23).As occurred with the extract frorn 13, Mo was accumulated frorn the I8extract by both the fathead minnows and the green sunfish. Molybdenuinlevels in the green sunfish tissue exposed to the I8 extract were almost 40times greater than those in the control fish. The level of Mo accumulatedin fathead minnows exposed to I8 extract was more than 20 times that found