Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil
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Elsevier B.V.
2016
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my.unimap-421942016-06-25T03:53:31Z Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil Lau, Yen Yie Wong, Yee Shian Teng, Tjoon Tow Norhashimah, Morad Mohd Rafatullah Ong, Soon-An yswong@unimap.edu.my Acid Orange 7 Azo dye Coagulation Dye degradation Laterite soil Link to publisher's homepage at http://www.journals.elsevier.com/ A novel degradation pathway of Acid Orange 7 (AO 7) by laterite soil in coagulation process is suggested. AO 7 has a strong azo bond links with benzene and naphthalene rings. The rings in AO 7 can be cleaved during coagulation and flocculation by laterite soil. Laterite soil rich in silica component could treat AO 7 with 98.43% color removal at pH 2. It could degrade azo dye molecule to the simplest hydrocarbon structure and non-toxic products in coagulation process through a linkage of reactions: C. N bond cleavage, desulfonation, silication, diazene reductase and polymerization. Ascertainment of the degradation pathway and products were characterized by UV-Vis and FT-IR techniques. The results show that laterite soil is bi-functional as a coagulant as well as a flocculant. Sludge Volume Index (SVI) with sludge generated as low as 21.703. mL/g provides evidence that, laterite soil has polymerization characteristic by forming n-methylsisiloxane and n-methyldisilathiane. Laterite soil detached sulfate ion in AO 7 to form n-methyldisilathiane, indirectly preventing sulfate ion to be exposed to environment. 2016-06-25T03:53:31Z 2016-06-25T03:53:31Z 2014-06-15 Article Chemical Engineering Journal, vol.246, 2014, pages 383-390 1385-8947 http://dspace.unimap.edu.my:80/xmlui/handle/123456789/42194 http://dx.doi.org/10.1016/j.cej.2014.02.100 en Elsevier B.V. |
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| language |
English |
| topic |
Acid Orange 7 Azo dye Coagulation Dye degradation Laterite soil |
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Acid Orange 7 Azo dye Coagulation Dye degradation Laterite soil Lau, Yen Yie Wong, Yee Shian Teng, Tjoon Tow Norhashimah, Morad Mohd Rafatullah Ong, Soon-An Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| description |
Link to publisher's homepage at http://www.journals.elsevier.com/ |
| author2 |
yswong@unimap.edu.my |
| author_facet |
yswong@unimap.edu.my Lau, Yen Yie Wong, Yee Shian Teng, Tjoon Tow Norhashimah, Morad Mohd Rafatullah Ong, Soon-An |
| format |
Article |
| author |
Lau, Yen Yie Wong, Yee Shian Teng, Tjoon Tow Norhashimah, Morad Mohd Rafatullah Ong, Soon-An |
| author_sort |
Lau, Yen Yie |
| title |
Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| title_short |
Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| title_full |
Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| title_fullStr |
Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| title_full_unstemmed |
Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| title_sort |
coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil |
| publisher |
Elsevier B.V. |
| publishDate |
2016 |
| url |
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/42194 |
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1643799610987118592 |