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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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23.1 Natural attenuation <strong>of</strong> chlorinated solvents 1595<br />

Reductive dechlorination<br />

Field & laboratory<br />

Field/in situ studies a<br />

Laboratory<br />

Anaerobic oxidation<br />

Field & laboratory<br />

Field/in situ studies a<br />

Laboratory<br />

Number <strong>of</strong><br />

rates<br />

Number <strong>of</strong><br />

reported<br />

rates<br />

Number <strong>of</strong><br />

calculated<br />

rates b<br />

31<br />

10<br />

21<br />

19<br />

3<br />

16<br />

12<br />

7<br />

5<br />

mean<br />

0.355<br />

0.029<br />

0.511<br />

standard<br />

deviation<br />

0.562<br />

0.039<br />

0.629<br />

90 th<br />

percentile<br />

1.110<br />

0.058<br />

1.280<br />

geometric<br />

mean c<br />

0.003<br />

0.000<br />

0.007<br />

range<br />

reported<br />

rates<br />

0-2.330<br />

0-0.125<br />

0-2.330<br />

TCE<br />

All studies<br />

Aerobic oxidation<br />

86 52 34 0.173 0.475 0.636 0.001 0-3.130<br />

In situ & laboratory<br />

In situ studies a<br />

12 6 6 0.005 0.010 0.025 0.000 0-0.028<br />

2 2 0<br />

Laboratory<br />

Aerobic cometabolism<br />

10 0 10 0.006 0.011 0.026 0.000 0-0.028<br />

Field & laboratory<br />

In situ studies a<br />

17 7 10 0.586 0.566 1.418 0.309 0.024-1.650<br />

3 2 1 0.948<br />

0.582 0.105-1.410<br />

Laboratory<br />

14 5 9 0.509 0.524 1.265 0.269 0.024-1.650<br />

Overall aerobic 29 13 16 0.346 0.517 1.354 0.001 0-1.650<br />

Aerobic/anaerobic (field<br />

studies)<br />

Reductive dechlorination<br />

1 1 0<br />

Field & laboratory<br />

Field/in situ studies a<br />

56 38 18 0.086 0.434 0.022 0.001 0-3.130<br />

32 26 6 0.003 0.005 0.006 0.000 0-0.023<br />

Laboratory<br />

Anaerobic oxidation<br />

Field & laboratory<br />

Field/in situ studies<br />

24 12 12 0.196 0.654 0.337 0.012 0-3.130<br />

a<br />

Laboratory<br />

Vinyl chloride<br />

All studies<br />

Aerobic oxidation<br />

26 8 18 0.229 0.476 0.946 0.023 0-1.960<br />

In situ & laboratory<br />

In situ studies a<br />

4 0 4 0.087<br />

0.080 0.043-0.125<br />

Laboratory<br />

Aerobic cometabolism<br />

4 0 4 0.087<br />

0.080 0.043-0.125<br />

Field & laboratory<br />

In situ studies a<br />

4 0 4 1.023<br />

0.552 0.055-1.960<br />

2 0 2 1.730<br />

1.715 1.500-1.960<br />

Laboratory<br />

2 0 2 0.316<br />

0.178 0.055-0.576

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