Citation
Muhrizal S., . and Shamshuddin Jusop, . (1998) Release of iron aluminium and sulfate from different land use systems in acid sulfate soils. [Proceedings Paper]
Abstract
Large reclamation projects by constructing irrigation and drainage canals during the 1980s in Southern Kalimantan Indonesia have made large tracks of acid sulfate and peat soils available for agricultural use. However the reclamation has resulted in environmental degradation due to release of toxic substances such as iron alluminium and sulfate arising from pyrite oxidation. We assessed the degree of pollution by monitoring the quality of water drained out of different kinds of land use systems namely: raised bed system shallow drainage system flooded rice system rain-fed rice system and secondary forest system. The soil is a Sulfic Fluvaquents extremely acid with dark humic topsoil 0-25 cm and uniformly brown layer 25-95 cm without jarosite. The sulphidic materials pyrite is below 95-cm depth. The lowest pH value of the drain water from several land uses was 2.8 occurring during the highest rainfall January. The value increased to 3.2 in March when the rainfall decreased. The pH of the drain water was higher under raised bed compared to the other systems. Pollution from acid sulfate soils leaching was probably the greatest during the onset of the high rainfall. Sulfate was released the highest followed by Al and Fe. These ions were found in great amount under secondary forest system.
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Abstract
Large reclamation projects by constructing irrigation and drainage canals during the 1980s in Southern Kalimantan Indonesia have made large tracks of acid sulfate and peat soils available for agricultural use. However the reclamation has resulted in environmental degradation due to release of toxic substances such as iron alluminium and sulfate arising from pyrite oxidation. We assessed the degree of pollution by monitoring the quality of water drained out of different kinds of land use systems namely: raised bed system shallow drainage system flooded rice system rain-fed rice system and secondary forest system. The soil is a Sulfic Fluvaquents extremely acid with dark humic topsoil 0-25 cm and uniformly brown layer 25-95 cm without jarosite. The sulphidic materials pyrite is below 95-cm depth. The lowest pH value of the drain water from several land uses was 2.8 occurring during the highest rainfall January. The value increased to 3.2 in March when the rainfall decreased. The pH of the drain water was higher under raised bed compared to the other systems. Pollution from acid sulfate soils leaching was probably the greatest during the onset of the high rainfall. Sulfate was released the highest followed by Al and Fe. These ions were found in great amount under secondary forest system.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| AGROVOC Term: | IRON |
| AGROVOC Term: | ALUMINIUM |
| AGROVOC Term: | SULPHATES |
| AGROVOC Term: | LAND USE |
| AGROVOC Term: | ACID SULPHATE SOILS |
| AGROVOC Term: | PYRITES |
| AGROVOC Term: | TOP SOIL |
| AGROVOC Term: | SAMPLING |
| AGROVOC Term: | DRAINAGE WATER |
| AGROVOC Term: | FIELDS |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/16336 |
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