Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika

Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika

The harmful algal bloom (HABs) phenomena affects human health, ecosystems, fishing, and tourism industries. In a single occasion, the loss due to HABs can reach thousands of Ringgit Malaysia. In this study, a chitosan-silica composite (RHA-CHi) was synthesized via sol-gel technique for the mitigat...

Full description

Bibliographic Details
Main Authors: Iqbal, Anwar, Ahmad, Najwa, Mohammad Noor, Normawaty, Wilson, Lee D., Ibrahim, Nur Hanisah
Format: Article
Language:English
English
Published: Malaysian Analytical Society 2019
Subjects:
Q Science (General)
QH301 Biology
Online Access:http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/1/72392%20Mitigation%20of%20toxic.pdf
http://irep.iium.edu.my/72392/2/72392%20Mitigation%20of%20toxic%20SCOPUS.pdf
id iium-72392
recordtype eprints
spelling iium-723922019-07-16T10:31:18Z http://irep.iium.edu.my/72392/ Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika Iqbal, Anwar Ahmad, Najwa Mohammad Noor, Normawaty Wilson, Lee D. Ibrahim, Nur Hanisah Q Science (General) QH301 Biology The harmful algal bloom (HABs) phenomena affects human health, ecosystems, fishing, and tourism industries. In a single occasion, the loss due to HABs can reach thousands of Ringgit Malaysia. In this study, a chitosan-silica composite (RHA-CHi) was synthesized via sol-gel technique for the mitigation of Alexandrium tamiyavanichii, a toxic HAB species isolated from Malaysian waters. Rice husk ash silica was used as the silica precursor in the composite synthesis. The FT-IR spectroscopy suggests that the chitosan was covalently bonded with the surface silanol groups. Light microscope analysis showed that the algal cells were stuck on the surface of the composite and underwent lysis. The incorporation of chitosan decreased the surface negative charge of the silica, hence, increasing the electrostatic attraction between the cells and RHA-Chi. The removal efficiency of A. tamiyavanichii was 75% using 0.1 mg/mL of RHA-Chi in 2 hours, increasing to 85% after 24 hours. Reduced removal efficiency (16%) was observed using silica alone. The findings show that the chitosan-silica composite has high potential to be used in the mitigation of A. tamiyavanichii. ******************************************************************************************************** Fenomena ledakan alga-bahaya mengancam kesihatan manusia, industri perikanan dan pelancongan. Dalam satu kejadian, kerugian boleh mencecah ribuan Ringgit Malaysia. Dalam kajian ini, komposit kitosan-silika (RHA-CHi) telah disintesis melalui kaedah sol-gel untuk mitigasi Alexandrium tamiyavanichii, spesis bertoksik HAB yang dipencilkan dari perairan Malaysia. Abu sekam padi telah digunakan sebagai pelopor silika dalam sintesis komposit. Spektroskopi FT-IR menunjukkan kitosan terikat secara kovalen dengan kumpulan silanol permukaan. Analisis mikroskopi cahaya menunjukkan sel alga melekat pada permukaan komposit dan mengalami lisis. Penggabungan kitosan telah mengurangkan cas negatif permukaan silika lalu meningkatkan tarikan elektrostatik antara sel dan RHA-Chi. Kecekapan penyingkiran A. tamiyavanichii dalam masa 2 jam apabila 0.1 mg/ml RHA-Chi digunakan adalah 75% dan meningkat ke 85% selepas 24 jam manakala pengurangan kecekapan penyingkiran (16%) diperhatikan bagi silika sahaja. Penemuan ini menunjukan komposit kitosan-silika mempunyai potensi yang tinggi untuk digunakan dalam mitigasi ledakan alga-bahaya terutamanya A. tamiyavanichii. Malaysian Analytical Society 2019-02 Article PeerReviewed application/pdf en http://irep.iium.edu.my/72392/1/72392%20Mitigation%20of%20toxic.pdf application/pdf en http://irep.iium.edu.my/72392/2/72392%20Mitigation%20of%20toxic%20SCOPUS.pdf Iqbal, Anwar and Ahmad, Najwa and Mohammad Noor, Normawaty and Wilson, Lee D. and Ibrahim, Nur Hanisah (2019) Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika. Malaysian Journal of Analytical Sciences, 23 (1). pp. 31-39. ISSN 1394-2506 http://www.ukm.my/mjas/v23_n1/pdf/Anwar_23_1_4.pdf 10.17576/mjas-2019-2301-04
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
English
topic Q Science (General)
QH301 Biology
spellingShingle Q Science (General)
QH301 Biology
Iqbal, Anwar
Ahmad, Najwa
Mohammad Noor, Normawaty
Wilson, Lee D.
Ibrahim, Nur Hanisah
Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
description The harmful algal bloom (HABs) phenomena affects human health, ecosystems, fishing, and tourism industries. In a single occasion, the loss due to HABs can reach thousands of Ringgit Malaysia. In this study, a chitosan-silica composite (RHA-CHi) was synthesized via sol-gel technique for the mitigation of Alexandrium tamiyavanichii, a toxic HAB species isolated from Malaysian waters. Rice husk ash silica was used as the silica precursor in the composite synthesis. The FT-IR spectroscopy suggests that the chitosan was covalently bonded with the surface silanol groups. Light microscope analysis showed that the algal cells were stuck on the surface of the composite and underwent lysis. The incorporation of chitosan decreased the surface negative charge of the silica, hence, increasing the electrostatic attraction between the cells and RHA-Chi. The removal efficiency of A. tamiyavanichii was 75% using 0.1 mg/mL of RHA-Chi in 2 hours, increasing to 85% after 24 hours. Reduced removal efficiency (16%) was observed using silica alone. The findings show that the chitosan-silica composite has high potential to be used in the mitigation of A. tamiyavanichii. ******************************************************************************************************** Fenomena ledakan alga-bahaya mengancam kesihatan manusia, industri perikanan dan pelancongan. Dalam satu kejadian, kerugian boleh mencecah ribuan Ringgit Malaysia. Dalam kajian ini, komposit kitosan-silika (RHA-CHi) telah disintesis melalui kaedah sol-gel untuk mitigasi Alexandrium tamiyavanichii, spesis bertoksik HAB yang dipencilkan dari perairan Malaysia. Abu sekam padi telah digunakan sebagai pelopor silika dalam sintesis komposit. Spektroskopi FT-IR menunjukkan kitosan terikat secara kovalen dengan kumpulan silanol permukaan. Analisis mikroskopi cahaya menunjukkan sel alga melekat pada permukaan komposit dan mengalami lisis. Penggabungan kitosan telah mengurangkan cas negatif permukaan silika lalu meningkatkan tarikan elektrostatik antara sel dan RHA-Chi. Kecekapan penyingkiran A. tamiyavanichii dalam masa 2 jam apabila 0.1 mg/ml RHA-Chi digunakan adalah 75% dan meningkat ke 85% selepas 24 jam manakala pengurangan kecekapan penyingkiran (16%) diperhatikan bagi silika sahaja. Penemuan ini menunjukan komposit kitosan-silika mempunyai potensi yang tinggi untuk digunakan dalam mitigasi ledakan alga-bahaya terutamanya A. tamiyavanichii.
format Article
author Iqbal, Anwar
Ahmad, Najwa
Mohammad Noor, Normawaty
Wilson, Lee D.
Ibrahim, Nur Hanisah
author_facet Iqbal, Anwar
Ahmad, Najwa
Mohammad Noor, Normawaty
Wilson, Lee D.
Ibrahim, Nur Hanisah
author_sort Iqbal, Anwar
title Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
title_short Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
title_full Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
title_fullStr Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
title_full_unstemmed Mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = Mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
title_sort mitigation of toxic alexandrium tamiyavanichii using chitosan-silica composite = mitigasi alexandrium tamiyavanichii bertoksik menggunakan komposit kitosan-silika
publisher Malaysian Analytical Society
publishDate 2019
url http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/
http://irep.iium.edu.my/72392/1/72392%20Mitigation%20of%20toxic.pdf
http://irep.iium.edu.my/72392/2/72392%20Mitigation%20of%20toxic%20SCOPUS.pdf
first_indexed 2023-09-18T21:42:34Z
last_indexed 2023-09-18T21:42:34Z
_version_ 1777413238184476672

Similar Items