MODERN BIOGEOCHEMISTRY: SECOND EDITION Phần 10 pdf

... 273 N Netherlands, 63, 64, 109 , 370 Neurotoxic effects, 117 Nitrate, 98, 99, 103 , 104 , 107 , 108 , 109 , 110, 111, 138, 140, 141, 146, 161, 188, 247, 285, 333, 335, 336, 342, 345 Nitrogen, N, 6, 35, 40, 107 , 115, ... 232 Methemoglobinemia, 42, 103 , 108 , 109 Methylation, 268 Microelements, 95, 143, 157, 182, 185, 194 Migration, 20, 23, 31, 33, 36, 37, 39, 48, 80, 82, 93, 97,...

Ngày tải lên: 07/08/2014, 04:20

... 578 22 Ti 102 100 170 330 113 130 86 110 Cu 86 86 88 60 107 90 124 51 Pb 64 60 62 130 84 77 11 85 Sr 43 60 73 88 35 85 33 84 Zr 38 36 33 61 20 27 28 48 Cr 28 51 26 41 28 37 34 56 Ni 23 100 17 120 ... indicator of this absorption. These values for Fe and Mn are in a range of n × 10 2 to n × 10 3 . This ratio is aboutn 10 1 for Zn, Cu,andNi. It isnoteworthythat the high concentrations...

Ngày tải lên: 07/08/2014, 04:20

... generalizing the modern ideas of both biogeochemical and environmental risk assessment during recent years. Only a few books are available for xv MODERN BIOGEOCHEMISTRY: SECOND EDITION Environmental ... 0.26–0.50 3 Sub-boreal 0.51–0.80 4 Mediterranean 0.81–0.99 5 Subtropical and tropical 1.00 MODERN BIOGEOCHEMISTRY Second Edition Environmental Risk Assessment CONTENTS xiii 2.6...

Ngày tải lên: 07/08/2014, 04:20

... following condition: K 2 = ⎧ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎩ 0.15, if C:N < 10, 0.25, if 10 ≤ C:N < 14, 0.30, if 14 ≤ C:N < 20, 0.35, if C:N ≥ 20, (10) where C:N is the ratio between carbon and nitrogen content ... 6—disturbedratio of Ca:P.7 10 Dry Steppe, Semi-Desert andDesert region of biosphere. Biogeochemical provinces: 7—Cu deficit; 8—Cu deficit, Mo and sulfate excess; 9—B excess; 10 Co an...

Ngày tải lên: 07/08/2014, 04:20

... about 5 per 100 ,000 individuals. The traditional reasons, highlighted in the news media, are smoking and strong alcohol drinking. However, there are some BIOGEOCHEMICAL APPROACHES 101 Figure 4. ... stomach pH, nitrite is also converted to H 2 NO + 2 , which is capable of nitrosating secondary amines and secondary amides. The resulting N-nitrosoamines may be carcinogenic. For example, N-ni...

Ngày tải lên: 07/08/2014, 04:20

... estimated as 25 × 10 6 tons per year and that in spring is 15 × 10 6 tons per year. The seasonal dust emission amounts in summer, autumn and winter are 1.4 10 6 ,5.7 × 10 6 and 2.9 × 10 6 tons, correspondingly. During ... ecosystems is about 8 kg/ha. The content of chemical species is about 100 100 0 ppm for Ca, Mg, Na and Fe; n × 10 ppm for Mn, Zn, Sr, Cr; 1 10 ppm for Cu, Ni an...

Ngày tải lên: 07/08/2014, 04:20

... 40 25 8 h 10 20 10 10 10 – 24 h – – – – – 12 O 3 30 min – – – 200 – – 1 h 200 200 160 – 235 128 8 h 120 – – – – – SPM 24 h 260 330 230 180 260 200 Annual 90 100 90 – 75 100 Lead 24 h – 10 2 – – ... Japan SO 2 10 min 500 – – – – – 1 h 350 – 900 850 – 285 24 h 105 300 300 370 365 114 Annual – 100 60 – 80 – NO 2 30 min – – – 300 – 1 h 320 320 – – – 205 24 h 102 Annual – – 100 –...

Ngày tải lên: 07/08/2014, 04:20

... 1% 10% 10% 3% 3% 91% Delhi autumn 15% 3% 18% 2% 21% 6% 7% 2% 75% Delhi winter ie% 7% 4% 9% 29% 8% 7% 5% 85% Kolkata spring 24% 11% 28% 4% 19% 15% 2% 3% 107 % Kolkata summer 61% 8% 21% 1% 24% 10% ... STUDIES 287 Table 7. Percent contributions of different sources to ambient PM2.5. Road Secondary Secondary Secondary City and season Diesel Gasoline dust Coal Biomass sulfates nitrates ammoniu...

Ngày tải lên: 07/08/2014, 04:20

... maximum permissible concentration (MPC, for DDT, HCH and PCB, are equal to 100 , 20 and 1 ppb correspondingly for water and 100 , 100 and 100 for bottom sediments); behavior of toxic compounds in the water ... different river basins. HCH isomers Basin DDT DDE HCH αβγ References Middle Volga river 3240 10, 500 800–880 106 –252 Ovanesyants et al., 2001 Middle Volga river 90 Kochneva et al....

Ngày tải lên: 07/08/2014, 04:20

... 1,000–200,000 Including B[a]P 1–130 2.7–50,000 Total PCBs 0.1–1,000 10 10, 000 Total DDT n.d. ∗ –70,000 10 100 Total (α, β, γ )HCH n.d.–1,000 5 100 HCB 0.01 10 1.2 Total PCDD/Fs 0.0001–6 0.004 ∗ n.d.—not detectable TRANS-BOUNDARY ... re-emission. The frac- tion of concentrations caused by this process can reach 10 15% in some countries (Figure 9(b)). Figure 10 presents calculated valu...

Ngày tải lên: 07/08/2014, 04:20