Page 410 - Soil and water contamination, 2nd edition

Answers to exercises 397

14. Sample 1: pe = 10.1; sample 2: pe = 7.9.

CHAPTER 3

3. sandy loam

CHAPTER 4

3.
Material Surface charge
pH = 5.4 pH = 6.8
positive positive
Al 2 O 3
negative negative
Al(OH) 3
positive negative
Fe 2 O 3
positive positive
Fe(OH) 3
Quartz (SiO 2 ), feldspars negative positive
Clay minerals: kaolinite negative negative
Montmorillonite negative negative

CHAPTER 5

1.
No. Brand Location I.B. Hardness Hardness
% mg l -1 German degrees
1 Contrex Contrexeville, France -1.0 618 34.7
2 Gerolsteiner Gerolstein, Germany 0.0 2621 147
3 Kaiserbrunnen Aachen, Germany -0.1 383 21.6
4 Lete Pratella, Italy -0.2 1717 96.5
5 Monchique Monchique, Portugal 14.8 6.8 0.4
6 Parot St-Romain-le-Puy, France -4.5 1084 60.9
7 Ramlösa Helsingborg, Sweden -0.1 15.1 0.8
8 Rogaska Slatina, Slovenia -0.2 9060 509
9 Sourcy Bunnik, Netherlands 2.6 221 12.4
10 Spa Barisart Spa, Belgium -0.2 29.5 1.7

6. a. 549 mm y -1
b. No additional Cl inputs are assumed.

2+
8. a. CaCO + H O + CO ↔ Ca + 2 HCO -
3 2 2 3
2+
-
b. CaCO + HNO ↔ Ca + HCO + NO -
3 3 3 3
c. No;
2+
-
d. Average Ca : HCO molar ratio = 0.62;
3
e. Approximately 24 percent of the dissolution of CaCO is attributable to acidification
3

10/1/2013 6:47:53 PM
Soil and Water.indd 409
Soil and Water.indd 409 10/1/2013 6:47:53 PM