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Coagulation-flocculation of azo dye acid orange 7 with green refined laterite soil

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Main Authors: Lau, Yen Yie, Wong, Yee Shian, Teng, Tjoon Tow, Norhashimah, Morad, Mohd Rafatullah, Ong, Soon-An
Other Authors: yswong@unimap.edu.my
Format: Article
Language:English
Published: Elsevier B.V. 2016
Subjects:
Acid Orange 7
Azo dye
Coagulation
Dye degradation
Laterite soil
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/42194
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spelling 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.
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Acid Orange 7
Azo dye
Coagulation
Dye degradation
Laterite soil
spellingShingle 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
_version_ 1643799610987118592
score 13.222552

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