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Development of novel fluorescent sensors for the screening of emerging chemical pollutants in water
Expanded Title:Emerging chemical pollutants (ECPs) may be defined as chemicals which do not have a regulatory status, but which may have an adverse effect on human health and the environment. Data relating to the occurrence of ECPs in South African waters is currently very limited, which can be ascribed in part to the high cost of performing the complex analyses involved. This project aimed to address this shortcoming by developing novel quantum dot (QD) based fluorescence sensors for target ECPs of relevance to South Africa. ECPs covering a range of compound classes were selected as target analytes after prioritising over 150 compounds. Specifically, compounds which were known to have environmental and human health concerns and/or are known to be used or produced in large quantities and are ubiquitous in the environment were selected, namely polycyclic aromatic hydrocarbons (as a compound class); atrazine (a pesticide); acetaminophen (a pharmaceutical) and triclosan (a personal care product). Two types of QDs, namely semi-conductor CdSe/ZnS QDs and graphene QDs, were synthesised, characterised and then evaluated as fluorescence sensors of target ECPs in water. Environmentally appropriate limits of detection were achieved and these novel fluorescence sensors were shown to have the potential to provide complimentary information to standard analytical approaches and may thus enable wider monitoring of target ECP contamination in South African water in a cost effective manner. The sensors may also find application in determining the effectiveness of wastewater treatment processes in the removal of ECPs. It is thus envisaged that after further optimisation, these sensors will assist in enhancing the sound management of our water resources
Date Published:01/11/2017
Document Type:Research Report
Document Subjects:Ecosystem - Biomonitoring, R & D - Research capacity
Document Keywords:Water Quality
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:2438/1/17
ISBN No:978-1-4312-0936-1
Authors:Adegoke O; Dabrowski JM; Montaseri H; Nsibande SA; Petersen F; Forbes PBC
Project No:K5/2438
Document Size:7 177 KB
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