Mineralogy and Surface Charge Properties of two Acid Sulfate Soils from Peninsular Malaysia
Two acid sulfate soils sampled from an oil palm estate in Perak, Peninsular Malaysia, were studied. The soils were characterized by a low pH and the presence of yellowish mottles, which were identified as jarosite and/or natrojarosite. Other minerals present were kaolinite, mica, mica-smectite an...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
1986
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2423/1/Mineralogy_and_Surface_Charge_Properties_of.pdf http://psasir.upm.edu.my/id/eprint/2423/ |
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| Summary: | Two acid sulfate soils sampled from an oil palm estate in Perak, Peninsular Malaysia, were
studied. The soils were characterized by a low pH and the presence of yellowish mottles, which were
identified as jarosite and/or natrojarosite. Other minerals present were kaolinite, mica, mica-smectite
and smectite. The negative charges on the soil surface were found to increase significantly with an
increase in pH. This increase was not related to the presence of oxides and/or hydroxides as these
materials were present in very small amounts in the soils. On account of the increase in the negative
charges with an increase in pH, it is suggested that CEC of acid sulfate soils be determined at soil pH
to give a better reflection of the soil properties. Further, it was found that the soils were highly
buffered at pH 3 - 5. The strong buffering at this pH range was related to the presence of high
amounts ofaluminium in the soil. |
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