Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia
Pyrite in hydromorphic soils is oxidized when it is exposed to the atmosphere. The sulfide oxidation releases hydrogen (H+) ions and other ions into the aqueous solution, and subsequently hydroxy-sulfates are formed. A laboratory aging experiment was conducted using coastal sulfate-rich soils in Mal...
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| Format: | Article |
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Taylor & Francis Group
1995
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| Online Access: | http://psasir.upm.edu.my/id/eprint/115820/ |
| _version_ | 1848866869908340736 |
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| author | Shamshuddin, J. Jamilah, I. Ogunwale, J.A. |
| author_facet | Shamshuddin, J. Jamilah, I. Ogunwale, J.A. |
| author_sort | Shamshuddin, J. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Pyrite in hydromorphic soils is oxidized when it is exposed to the atmosphere. The sulfide oxidation releases hydrogen (H+) ions and other ions into the aqueous solution, and subsequently hydroxy-sulfates are formed. A laboratory aging experiment was conducted using coastal sulfate-rich soils in Malaysia to identify and determine the nature and composition of the hydroxy-sulfates and to explain the mechanism of their formation. Powder X-ray diffraction (XRD) analysis showed that incubating the pyrite-bearing soils in the presence of added electrolyte (KC1 and NaCl) resulted in the formation of jarosite, natrojarosite, and/or alunite. Subsequent transmission electron microscopy-energy dispersive X-ray (TEM-EDAX) analysis showed that a hydroxy-sulfate crystal was composed mainly of hydrogen (H), oxygen (O), sodium (Na), aluminum (Al), sulfur (S), potassium (K), and iron (Fe) which was accounted for as jarosite, natrojarosite, and/or alunite by powder XRD. The small amount of fluorine (F), nickel (Ni), titanium (Ti), and manganese (Mn) occurring within the same hydroxy-sulfate crystal was presumably originated from pyrite. This result points to the formation of hydroxy-sulfates in acid sulfate soils via psuedomorphic replacement of pyrite; under an oxidizing environment. |
| first_indexed | 2025-11-15T14:27:28Z |
| format | Article |
| id | upm-115820 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:27:28Z |
| publishDate | 1995 |
| publisher | Taylor & Francis Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1158202025-03-13T03:38:40Z http://psasir.upm.edu.my/id/eprint/115820/ Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia Shamshuddin, J. Jamilah, I. Ogunwale, J.A. Pyrite in hydromorphic soils is oxidized when it is exposed to the atmosphere. The sulfide oxidation releases hydrogen (H+) ions and other ions into the aqueous solution, and subsequently hydroxy-sulfates are formed. A laboratory aging experiment was conducted using coastal sulfate-rich soils in Malaysia to identify and determine the nature and composition of the hydroxy-sulfates and to explain the mechanism of their formation. Powder X-ray diffraction (XRD) analysis showed that incubating the pyrite-bearing soils in the presence of added electrolyte (KC1 and NaCl) resulted in the formation of jarosite, natrojarosite, and/or alunite. Subsequent transmission electron microscopy-energy dispersive X-ray (TEM-EDAX) analysis showed that a hydroxy-sulfate crystal was composed mainly of hydrogen (H), oxygen (O), sodium (Na), aluminum (Al), sulfur (S), potassium (K), and iron (Fe) which was accounted for as jarosite, natrojarosite, and/or alunite by powder XRD. The small amount of fluorine (F), nickel (Ni), titanium (Ti), and manganese (Mn) occurring within the same hydroxy-sulfate crystal was presumably originated from pyrite. This result points to the formation of hydroxy-sulfates in acid sulfate soils via psuedomorphic replacement of pyrite; under an oxidizing environment. Taylor & Francis Group 1995 Article PeerReviewed Shamshuddin, J. and Jamilah, I. and Ogunwale, J.A. (1995) Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia. Communications in Soil Science and Plant Analysis, 26 (17-18). pp. 2769-2782. ISSN 0010-3624; eISSN: 1532-2416 https://www.tandfonline.com/doi/full/10.1080/00103629509369486 10.1080/00103629509369486 |
| spellingShingle | Shamshuddin, J. Jamilah, I. Ogunwale, J.A. Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title | Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title_full | Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title_fullStr | Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title_full_unstemmed | Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title_short | Formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in Malaysia |
| title_sort | formation of hydroxy-sulfates from pyrite in coastal acid sulfate soil environments in malaysia |
| url | http://psasir.upm.edu.my/id/eprint/115820/ http://psasir.upm.edu.my/id/eprint/115820/ http://psasir.upm.edu.my/id/eprint/115820/ |