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

controls were essentially the same length and weight as those exposed tothe extracts (Table 35). Furthermore, when the differences between i niti a1and final mean lengths and weights for fathead minnows (Table 36) and greensunfish (Table 37) were compared, the growth of the control andexperimental animals was approximately the same. Only the fathead minnowsexposed to I3 and I2 extracts grew appreciably less than the controls, butthe differences were not significant.Table 35. Comparison of the mean final lengths and weights between the control test organisms and the organismsexposed to fly ash extracts.Green sunfishaFathead minnowa1 ength weight length weightControl vs ~ 2 b 0.31 3 0.457 1.503 1 .I41Control vs I3 0.368 0.773 0.585 0.446Control vs I8 0.091 0. 508 0.369 0.195Control vs 17 1.467 1.447 0.291 0-516Control vs I2 2.676 0.470 0.968 0.753aThe values listed are F(1 18) values generated by one-way analysisof variance. If the F value is greater then 3.01, the means aresignificantly different.b~ = 10 for each test and control group, except for I3 fathead minnows,N = 7, and for I7 fathead minnows, N = 6.Table 36. Differences between initial and final mean lengths and weights of adult fathead minnows exposed to extractsfrom five fly ashes and a control.Control +2.0W2 +2.3I3 +0.6I8 +1.9I7 4-2.3I2 4-0. 1Di fference i nDifference inmean length Percent increase mean weight Percent increase(mm) in mean length (9) in mean weightTable 37. Differences between initial and final mean lengths and weights of juvenile green sunfish exposed to extractsfrom five fly ashes and a control.Di fferences inDi ff erences i nmean length Percent increase mean weight Percent increase(mm) in mean length (9) in mean weightControl +7.8 16.2W2 +6.2 12.9I3 +5.5 11.2I8 +6.3 12.9I7 +8.8 17.2I2 +7.6 14.9