Laboratory Studies on the Release of Cations and Anions in Acid Sulfate Soils from Pulau Lumut,Selangor
Acid sulfate soils in Peninsular Malaysia are characterized l7y low pH and high amounts of At. Alleviation of toxic ions in the soils l7y controlled drainage is recommended. However, potential acidity remains in the soils due to slow release of toxic ions during mineral weathering. A study was con...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
1991
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2869/1/Laboratory_Studies_on_the_Release_of_Cations_and_Anions_in_Acid_Sulfate_Soils.pdf http://psasir.upm.edu.my/id/eprint/2869/ |
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| Summary: | Acid sulfate soils in Peninsular Malaysia are characterized l7y low pH and high amounts of At. Alleviation of toxic
ions in the soils l7y controlled drainage is recommended. However, potential acidity remains in the soils due to slow
release of toxic ions during mineral weathering. A study was conducted to determine the release of Al and other ions
l7y repetitive extraction of samples from the field and l7y aerobic incubation of samples in the laboratory. The results
showed that Al was released continuously from the soils even after the sixth extraction. When the soils were allowed
to undergo free oxidation under aerobic conditions Al, Mn, Fe, Ca, Mg, K, Na and S were released into the soil
solutions due to breakdown of clay minerals. Activities of these ions increased significantly, resulting in an increase
of electrical conductivity of the soil solution. Additionally, pH of the soil solution dropped. These commonly observed properties of acid sulfate soils have great implications on their management practices. |
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