Multimedia Environmental Models - Chapter 2 docx

... d(contents)/dt 2 – 2. 78C – 10C = d(10 6 C)/dt or dC/ (2 – 12. 78C) = 10 –6 dt or ln (2 – 12. 78C)/(– 12. 78) = 10 –6 t + IC When t is zero, C is zero, thus, IC = –ln (2) / 12. 78 and ln[ (2 – 12. 78C) /2] = – 12. 78 ... = –10 2 dt Integrating gives lnC = –10 2 t + IC McKay, Donald. "Some Basic Concepts" Multimedia Environmental Models Edited by Donald McKay Boca...

Ngày tải lên: 11/08/2014, 04:20

... matter" Multimedia Environmental Models Edited by Donald McKay Boca Raton: CRC Press LLC ,20 01 20 01 CRC Press LLC Contents Chapter 1 Introduction Chapter 2 Some Basic Concepts 2. 1 Introduction 2. 2 ... "Introduction" Multimedia Environmental Models Edited by Donald McKay Boca Raton: CRC Press LLC ,20 01 Multimedia Environmental Models The...

Ngày tải lên: 11/08/2014, 04:20

... 5500 21 0 2, 4-dimethylphenol 122 .17 13. 02 8795 2. 35 26 17 55 170 550 23 00 p-cresol 108.13 13 20 000 1.96 34.8 5 17 55 170 20 7 dimethylphthalate (DMP) 194 .2 0 .22 4000 2. 12 5 170 170 550 1700 24 00 diethylphthalate ... 20 1 .22 0.000 026 7 120 2. 36 1 42 55 170 550 1700 23 0 carbofuran 22 1.3 0.00008 351 2. 32 151 5 170 550 1700 5 chloropyrifos 350.6 0.0 022 7 0.73 4...

Ngày tải lên: 11/08/2014, 04:20

... on a 1 m 2 Area Basis Mineral matter Organic matter Total Organic carbon cm 3 gcm 3 gcm 3 gg Deposition 500 120 0 500 500 1000 1700 25 0 Resuspension 20 0 480 20 0 20 0 400 680 ... 20 0 480 20 0 20 0 400 680 100 OM conversion – – 23 3 23 3 23 3 23 3 117 Burial (solids) 300 720 67 67 367 787 33 Total burial is 1000 cm 3 /year or 1 420 g/year, corresponding to...

Ngày tải lên: 11/08/2014, 04:20

... D R ) Air 10000 4 ¥ 10 –4 0.4 0. 027 7 0. 021 21 0 22 .55 Water 100 0.1 0.1 0.0 924 5 .27 527 10.14 Soil 10 1.0 0.0 0.1386 52. 7 527 7.31 Total 0.5 0 .25 87 126 4 40 20 01 CRC Press LLC A key concept in this ... 10 –4 1.18 0.79 1.15 ¥ 10 –3 8087 16.8 0 .23 1000 0 .23 0.14 6394 13.3 28 .4 1500 19 0 .28 5968 12. 4 56.8 1500 38 Reaction rate D R f Advection rate D A f Total D T f 0 4...

Ngày tải lên: 11/08/2014, 04:20

... f 3 D 31 = f 1 (D 12 + D 13 + D R1 + D A1 ) = f 1 D T1 Water (subscript 2) E 2 + G A2 C B2 + f 1 D 12 + f 3 D 32 + f 4 D 42 = f 2 (D 21 + D 24 + D R2 + D A2 ) = f 2 D T2 Soil (subscript ... that f 2 = (I 2 + J 1 J 4 /J 3 + I 3 D 32 /D T3 + I 4 D 42 /D T4 )/(D T2 – J 2 J 4 /J 3 – D 24 ·D 42 /D T4 ) f 1 = (J 1 + f 2 J 2 )/J 3 f 3 = (I 3 + f 1...

Ngày tải lên: 11/08/2014, 04:20

... 125 .4 a — 12. 8 a — 1960 125 .8 0.3 19 .2 50 1970 129 .8 3.5 28 .4 122 1980 1 32. 8 5.9 36.4 184 1990 135.0 7.6 41.4 22 3 1995 129 .9 3.5 39.7 21 0 a The rate of 1950 was used as basis of comparison. From ... 1996. 23 . Nriagu, J.O., History of global metal pollution, Science , 27 2, 22 3, 1996. 24 . Waldron, H.A., The blood lead level threshold, Arch. Environ. H...

Ngày tải lên: 18/06/2014, 22:20

... Arsenault, 1996; Levine et al., 1999; Betinelli et al., 20 00; Falciani et al., 20 00; Chen and Ma, 20 01; Ivanova et al., 20 02; Sun et al., 20 01). Microwave-assisted aqua regia digestion using a Teflon bomb ... during digestion (Ryss, 1956; Wu et al., 1996): 6HF þ SiO 2 ! H 2 SIF 6 þ 2H 2 O H 3 BO 3 þ 3HF ! HBF 3 OH þ 2H 2 O HBF 3 OH þ HF ! HBF 4 þ H 2 O Adding boric acid in...

Ngày tải lên: 11/08/2014, 12:21

... quantity, then multiply by 100: (2. 1) For example, 22 percent (or 22 %) means 22 out of 100, or 22 /100. Dividing 22 by 100 results in the decimal 0 .22 : = 0 .22 • When using percentage in calculations ... psi ft 1 28 8 7×=. Pressure (psi) 0.433 5 ft=× = 2. 17 psi Head (ft) 2. 31 12. 2 psi=× 28 .2 ft 528 0 ft/mile 4 21 , 120 ft×= 21 , 120 ft 2. 31 ft/psi 9143 psi= L...

Ngày tải lên: 11/08/2014, 17:20

... CRM) E-Business E-Business Strategies, Inc. Strategies, Inc. www.ebstrategy.com www.ebstrategy.com contact@ebstrategy.com contact@ebstrategy.com 67 8-3 3 9-1 23 6 x201 67 8-3 3 9-1 23 6 x201 Fax - 67 8-3 3 9-9 793 Fax ... Solutions, Not Piecemeal Products Products One-stop life-needs providers – Wal-Mart One-stop lifestyle providers – The Gap One-stop life-path providers...

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