Changes in soil of pH and EC Chonbuk national university Department of Mineral Resource and Energy Engineering : Oh min seok Department of Environmental Engineering : Jin chang il

2. The principle of experiment Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 1. Self introduction 2. The principle of experiment 3. The method of experiment 4. The result of experiment 5. Conclusion and review

1. Self introduction Energy Engineering Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 1. Self introduction University : Chon-buk National University Major : Department of Mineral Resource and Energy Engineering Grade : Fourth grade Name : Oh Min-seok University : Chon-buk National University Major : Department of Environmental Engineering Grade : Third grade Name : Jin Chang-il

1. Self introduction Major : Civil and Environmental Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 1. Self introduction Major : Civil and Environmental Engineering Course Lab : Rock Mechanics Professor : Omine Tuter : Ms.Kaku

2. The principle of expriment Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 2. The principle of expriment  

3. The method of expriment Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 3. The method of expriment Soil 20g + water 50g = sample 1,2 Cement 20g + water 50g = alkalinity water Acid solution 10g + water 50g = acid water

3. The method of expriment Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 3. The method of expriment Injection Measure button power button Calibration button

① ③ ⑤ ② ④ ⑥ 3. The method of expriment ①,② : pure water Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 3. The method of expriment ①,② : pure water ③,④ : clean sand ⑤,⑥ : soil from garden ① ② ③ ④ ⑤ ⑥ Mixing alkalinity water Mixing acid solution

4. The result of expriment Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 4. The result of expriment Standard Liquid + Acid (10g) + Alkalinity (10g) pH E.C (mS/cm) Water (50g) 7.1 0.014 4.3 (-2.8) 0.29 (+0.176) 11.6 (+4.5) 1.27 (+1.213) Clean Sand (10g) +water(50g) 7.2 0.03 4.8 (-2.4) 0.33 (+0.3) (+4.4) 1.05 (+1.02) Soil from garden(10g) 6.8 0.003 5.5 (-1.3) 0.39 (+0.387) 9.5 (+2.7) 0.21 (+0.207)

Add alkalinity solution pH Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 5. Conclusion and review ① ② Add aicd solution pH Add alkalinity solution pH 4.875 7.179 4.876 7.279 4.873 6.879

5. Conclusion and review clay Soil surface Soil solution Nagasaki University Lecture on Specific Research in the Civil and Environmental Course 5. Conclusion and review clay Soil surface Soil solution This phenomenon is buffer capacity. The clay’s surface absorbs the positive(+) ion. So, pH is lower change than predicted pH.

Q & A Nagasaki University Lecture on Specific Research in the Civil and Environmental Course Q & A

Nagasaki University Lecture on Specific Research in the Civil and Environmental Course

Nagasaki University Lecture on Specific Research in the Civil and Environmental Course

Nagasaki University Lecture on Specific Research in the Civil and Environmental Course

Thank you Nagasaki University Lecture on Specific Research in the Civil and Environmental Course Thank you