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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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Main Authors: Ishak, Che Fauziah, S., Zauyah, Talib, Jamal
Format: Article
Language:English
English
Published: Elsevier 1996
Online Access: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
http://psasir.upm.edu.my/id/eprint/39691/
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
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.
format Article
author Ishak, Che Fauziah
S., Zauyah
Talib, Jamal
spellingShingle Ishak, Che Fauziah
S., Zauyah
Talib, Jamal
Characterization and land application of red gypsum: a waste product from the titanium dioxide industry
author_facet Ishak, Che Fauziah
S., Zauyah
Talib, Jamal
author_sort Ishak, Che Fauziah
title 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_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_sort characterization and land application of red gypsum: a waste product from the titanium dioxide industry
publisher Elsevier
publishDate 1996
url 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
http://psasir.upm.edu.my/id/eprint/39691/
_version_ 1805889925688590336
score 13.211869

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