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Detection of low-level humic acid in water using room temperature-synthesized copper (I) oxide colloids

Published online by Cambridge University Press:  20 September 2019

Olayemi J. Fakayode Open the ORCID record for Olayemi J. Fakayode [Opens in a new window] ,
Abolanle S. Adekunle Open the ORCID record for Abolanle S. Adekunle [Opens in a new window]  and
Thabo T.I. Nkambule Open the ORCID record for Thabo T.I. Nkambule [Opens in a new window]
Olayemi J. Fakayode*
Affiliation:
Nanotechnology and Water Sustainability Research Unit (NanoWS), College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), 60 Christian De Wet Street, P.O. Box 2820, Roodepoort, Florida, South Africa
Abolanle S. Adekunle
Affiliation:
Nanotechnology and Water Sustainability Research Unit (NanoWS), College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), 60 Christian De Wet Street, P.O. Box 2820, Roodepoort, Florida, South Africa Department of Chemistry, Faculty of Science, Obafemi Awolowo University, Ibadan RoadIle-Ife, Osun220005, Nigeria
Thabo T.I. Nkambule
Affiliation:
Nanotechnology and Water Sustainability Research Unit (NanoWS), College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), 60 Christian De Wet Street, P.O. Box 2820, Roodepoort, Florida, South Africa
*
Address all correspondence to Olayemi J. Fakayode at olayemifakayode@gmail.com
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Abstract

A glucose-reduced, room temperature-synthesized colloidal Cu2O solution (CCS) was used for the first time to detect humic acid (HA), a carcinogen-promoting substance in aqueous solution. The CCS sensor was characterized using standard spectroscopy and microscopy techniques. The sensor evolved as a carboxylic acid-capped peach-pink solution after synthesis. The result of the interaction of the sensor with HA in phosphate buffer solution (pH 7) showed a detection limit of 1.5891 × 10−2 mg/L over a concentration range of 0.00–0.41 mg/L. This finding suggests that the sensor may be useful for monitoring low levels of HA in aqueous environments.

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Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 4 , December 2019 , pp. 1317 - 1322
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Copyright
Copyright © Materials Research Society 2019

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