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<br />TABLE 8. - Elemental and anion variation in U.S. cement kiln dust, ug/g
<br />
<br />Element or anion
<br />Range 1
<br />Mean
<br />Median
<br />Ag ............... C3 - 17 5.4 4.8
<br />A1 ................ 9,900 - 50,200 23,200 23,100
<br />As ................ 1.3 - 518 24 9.3
<br />Ba ................ <55 <55 <55
<br />Be ................ <2 <2 <2
<br />Bi ............... <50 <50 <50
<br />Ca ................ 106,000 -367,000 295,000 305,000
<br />Cd ............... C1.5 - 352 21 7.3
<br />Co ................ <10 <10 <10
<br />Cr ................ 11 - 172 41 34
<br />Cu ................ 7 - 206 30 24
<br />Fe ................ 1,000 - 44,400 14,700 14,100
<br />Hg2 ............... <0.13- 1.0 <.13 <.13
<br />K ................. 3,400 -232,000 36,600 26,800
<br />Li ................ <4 - 76 18 16
<br />Mg ................ 1,980 - 19,100 7,820 6,820
<br />Mn ................ 63 - 2,410 383 280
<br />Mo ............... <50 <50 <50
<br />Na ................ 495 - 27,700 4,700 3,190
<br />Ni ................ <12 - 91 22 29
<br />Pb ................ 17 - 1,750 253 148
<br />Sb ................ C1.6 - 70 3.2 <1.6
<br />Si ................ 26,900 -111,000 63,500 65,100
<br />Sn ................ <100 <100 <100
<br />Sr ................ 62 - 8,750 670 430
<br />Ti ................ 500 - 2,900 3,530 1,100
<br />T1 ................ <60 - I85 <60 <60
<br />V ............... <100 <100 <100
<br />Zn ................ 32 - 8,660 462 167
<br />Br- ............... <200 <200 <200
<br />C1- ............... <100 -123,000 6,900 4,900
<br />F- ................ 100 - 3,600 1,300 1,000
<br />N02- .............. <200 <200 C200
<br />N03- .............. 200 - 16,700 <200 <200
<br />P043- ............. 200 - 1,600 <200 <200
<br />SO 2- ............. 4,100 -316,000 77,800 68,600
<br />lA value of l/2 the detection limit was arbitrarily used to calculate
<br />the mean for those elements having concentrations both above aid below the
<br />detection limit.
<br />2Mercury value based on only 16 samples.
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