Characterization and land application of red gypsum: a waste product from the titanium dioxide industry
A waste product from the titanium dioxide industry was analysed for its composition because of its potential use as a soil amendment in Malaysia. Under scanning electron microscopy (SEM), the gypsum crystals are present as tabular crystals of radiating elongated crystals in a matrix of calcite and i...
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| Format: | Article |
| Language: | English English |
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Elsevier
1996
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39691/ http://psasir.upm.edu.my/id/eprint/39691/1/5.%20Characterization%20and%20land%20application%20of%20red%20gypsum.pdf http://psasir.upm.edu.my/id/eprint/39691/7/1-s2.0-0048969796051790-main.pdf |
| _version_ | 1848849213350215680 |
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| author | Ishak, Che Fauziah S., Zauyah Talib, Jamal |
| author_facet | Ishak, Che Fauziah S., Zauyah Talib, Jamal |
| author_sort | Ishak, Che Fauziah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | A waste product from the titanium dioxide industry was analysed for its composition because of its potential use as a soil amendment in Malaysia. Under scanning electron microscopy (SEM), the gypsum crystals are present as tabular crystals of radiating elongated crystals in a matrix of calcite and iron oxides. The X-ray diffractogram (XRD) pattern of the iron concentrates shows the presence of goethite and hematite. The calcium content of red gypsum is 18.9% and the trace elements determined in this study (As, B, Cd, Cr, Cu, Ni and Pb) are present in low concentrations. A dissolution kinetics study indicates that the rate of red gypsum dissolution increases with decreasing particle size. On the other hand, Fe which is the other dominant element, exists in the non-soluble form. For the flocculation series test, only soils with a high percentage of water-dispersible clay (WDC) gave a positive effect of red gypsum on flocculation. Using the normal t-test, application of 10 Mg/ha of red gypsum on a Bungor soil series (16% WDC of bulk soil, a highly dispersive soil) was statistically significant (P = 0.1) in reducing runoffs, and total soil loss was reduced by > 30% compared with the control plot. |
| first_indexed | 2025-11-15T09:46:49Z |
| format | Article |
| id | upm-39691 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T09:46:49Z |
| publishDate | 1996 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-396912024-07-26T09:20:06Z http://psasir.upm.edu.my/id/eprint/39691/ Characterization and land application of red gypsum: a waste product from the titanium dioxide industry Ishak, Che Fauziah S., Zauyah Talib, Jamal A waste product from the titanium dioxide industry was analysed for its composition because of its potential use as a soil amendment in Malaysia. Under scanning electron microscopy (SEM), the gypsum crystals are present as tabular crystals of radiating elongated crystals in a matrix of calcite and iron oxides. The X-ray diffractogram (XRD) pattern of the iron concentrates shows the presence of goethite and hematite. The calcium content of red gypsum is 18.9% and the trace elements determined in this study (As, B, Cd, Cr, Cu, Ni and Pb) are present in low concentrations. A dissolution kinetics study indicates that the rate of red gypsum dissolution increases with decreasing particle size. On the other hand, Fe which is the other dominant element, exists in the non-soluble form. For the flocculation series test, only soils with a high percentage of water-dispersible clay (WDC) gave a positive effect of red gypsum on flocculation. Using the normal t-test, application of 10 Mg/ha of red gypsum on a Bungor soil series (16% WDC of bulk soil, a highly dispersive soil) was statistically significant (P = 0.1) in reducing runoffs, and total soil loss was reduced by > 30% compared with the control plot. Elsevier 1996-10-11 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/39691/1/5.%20Characterization%20and%20land%20application%20of%20red%20gypsum.pdf text en http://psasir.upm.edu.my/id/eprint/39691/7/1-s2.0-0048969796051790-main.pdf Ishak, Che Fauziah and S., Zauyah and Talib, Jamal (1996) Characterization and land application of red gypsum: a waste product from the titanium dioxide industry. Science of The Total Environment, 188 (2-3). pp. 243-251. ISSN 0048-9697; ESSN: 1879-1026 10.1016/0048-9697(96)05179-0 |
| spellingShingle | Ishak, Che Fauziah S., Zauyah Talib, Jamal Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title | Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title_full | Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title_fullStr | Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title_full_unstemmed | Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title_short | Characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| title_sort | characterization and land application of red gypsum: a waste product from the titanium dioxide industry |
| url | http://psasir.upm.edu.my/id/eprint/39691/ http://psasir.upm.edu.my/id/eprint/39691/ http://psasir.upm.edu.my/id/eprint/39691/1/5.%20Characterization%20and%20land%20application%20of%20red%20gypsum.pdf http://psasir.upm.edu.my/id/eprint/39691/7/1-s2.0-0048969796051790-main.pdf |