Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract

Curcuma xanthorrhiza also known as temulawak is a medicinal herb which can be found widely in Southeast Asia. C. xanthorrhiza is well-known because of its distinct bioactive and phytochemical compound. In this research, the bioactive compound of C. xanthorrhiza was used to capture and reduce silver...

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Main Author: Teh, Yoong Sin
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2022
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Online Access:http://eprints.usm.my/55651/1/Colorimetric%20Detection%20Of%20Heavy%20Metal%20Ions%20Using%20Green%20Synthesised%20Silver%20Nanoparticles%20From%20Curcuma%20Xanthorrhiza%20Extract.pdf
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spelling my.usm.eprints.55651 http://eprints.usm.my/55651/ Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract Teh, Yoong Sin T Technology TP155-156 Chemical engineering Curcuma xanthorrhiza also known as temulawak is a medicinal herb which can be found widely in Southeast Asia. C. xanthorrhiza is well-known because of its distinct bioactive and phytochemical compound. In this research, the bioactive compound of C. xanthorrhiza was used to capture and reduce silver ions into silver nanoparticles (AgNPs). Effect of pH on green synthesis of AgNPs was studied under optimal condition of 8 wt% rhizome extract concentration, 1:5 rhizome extract to silver nitrate (AgNO3) solution ratio and 72 hours incubation time as conducted by previous work. The effect of pH from 5 to 11 was studied and the highest absorbance intensity peak recorded was at pH 11. The morphology of the synthesised AgNPs is spherical in overall, and the average particle size synthesised at this pH is 218.245±0.123 nm. The recorded silver content using EDX analysis was 76 %. This further confirmed silver ions were reduced to AgNPs. The AgNPs biosynthesised using the optimum parameters were used for colorimetric detection of 1 mM of heavy metal ions (Mn2+, Ni2+, Zn2+, Co2+, Fe2+, Fe3+, Al3+, Cr2+, Cd2+, Pb2+, Hg2+, and Cu2+). The AgNPs able to detect Hg2+ ion with a significant decolorization from brown to colorless observed using the naked eye. The absorbance peak at wavelength 410 nm had disappeared, indicating reduction of AgNPs. Sensitivity analysis was performed to determine the limit of detection (LOD) of the detected heavy metal ions. The LOD for Hg2+ ion is 0.342 mM. Conversely, AgNPs would also be able to detect Fe2+, Fe3+, Al3+ ions, but with an increase of absorbance peak. The color changed from brown to dark brown and yellow, respectively. The LOD for Fe2+, Fe3+, Al3+ ions are 0.431 mM, 0.688 mM, and 0.847 mM, respectively. Universiti Sains Malaysia 2022-07-01 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/55651/1/Colorimetric%20Detection%20Of%20Heavy%20Metal%20Ions%20Using%20Green%20Synthesised%20Silver%20Nanoparticles%20From%20Curcuma%20Xanthorrhiza%20Extract.pdf Teh, Yoong Sin (2022) Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Kimia. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TP155-156 Chemical engineering
spellingShingle T Technology
TP155-156 Chemical engineering
Teh, Yoong Sin
Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
description Curcuma xanthorrhiza also known as temulawak is a medicinal herb which can be found widely in Southeast Asia. C. xanthorrhiza is well-known because of its distinct bioactive and phytochemical compound. In this research, the bioactive compound of C. xanthorrhiza was used to capture and reduce silver ions into silver nanoparticles (AgNPs). Effect of pH on green synthesis of AgNPs was studied under optimal condition of 8 wt% rhizome extract concentration, 1:5 rhizome extract to silver nitrate (AgNO3) solution ratio and 72 hours incubation time as conducted by previous work. The effect of pH from 5 to 11 was studied and the highest absorbance intensity peak recorded was at pH 11. The morphology of the synthesised AgNPs is spherical in overall, and the average particle size synthesised at this pH is 218.245±0.123 nm. The recorded silver content using EDX analysis was 76 %. This further confirmed silver ions were reduced to AgNPs. The AgNPs biosynthesised using the optimum parameters were used for colorimetric detection of 1 mM of heavy metal ions (Mn2+, Ni2+, Zn2+, Co2+, Fe2+, Fe3+, Al3+, Cr2+, Cd2+, Pb2+, Hg2+, and Cu2+). The AgNPs able to detect Hg2+ ion with a significant decolorization from brown to colorless observed using the naked eye. The absorbance peak at wavelength 410 nm had disappeared, indicating reduction of AgNPs. Sensitivity analysis was performed to determine the limit of detection (LOD) of the detected heavy metal ions. The LOD for Hg2+ ion is 0.342 mM. Conversely, AgNPs would also be able to detect Fe2+, Fe3+, Al3+ ions, but with an increase of absorbance peak. The color changed from brown to dark brown and yellow, respectively. The LOD for Fe2+, Fe3+, Al3+ ions are 0.431 mM, 0.688 mM, and 0.847 mM, respectively.
format Monograph
author Teh, Yoong Sin
author_facet Teh, Yoong Sin
author_sort Teh, Yoong Sin
title Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
title_short Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
title_full Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
title_fullStr Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
title_full_unstemmed Colorimetric Detection Of Heavy Metal Ions Using Green Synthesised Silver Nanoparticles From Curcuma Xanthorrhiza Extract
title_sort colorimetric detection of heavy metal ions using green synthesised silver nanoparticles from curcuma xanthorrhiza extract
publisher Universiti Sains Malaysia
publishDate 2022
url http://eprints.usm.my/55651/1/Colorimetric%20Detection%20Of%20Heavy%20Metal%20Ions%20Using%20Green%20Synthesised%20Silver%20Nanoparticles%20From%20Curcuma%20Xanthorrhiza%20Extract.pdf
http://eprints.usm.my/55651/
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score 13.222552