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      Actual priority of DEET and triclosan: Letter to the editor on “Emerging Organic Contaminants in Chinese Surface Water: Identification of Priority Pollutants”

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            Abstract

            We have read an article by (Zhong et al. 2021) published in Engineering, and critical errors were observed in the calculation of human health risk quotient (RQ hum) and the prioritization scheme. Zhong and co-authors adopted acceptable daily intake (ADI) values of 0.082 μg/kg/day for DEET and 0.19 μg/kg/day for triclosan, as shown in Table S4 of the original article.These values were cited from a review by Murray et al. (2010). However, as we have addressed previously (Yoshida et al. 2021; Fujitani et al. 2022), the ADIs of DEET and triclosan were not correct. Original study byBlanset et al. (2007) derived the correct values, 100 μg/kg/day and 50 μg/kg/day for DEET and triclosan, respectively. Zhong et al. calculated predicted no effect concentrations (PNECs) and RQ values from the incorrect ADIs. Therefore, an overestimation of more than 200- to 1000-fold for RQ hum values occurred as shown in Table 1. As a result, DEET and triclosan would be no longer priotized in this assessment.

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            Author and article information

            Journal
            ScienceOpen Preprints
            ScienceOpen
            8 July 2022
            Affiliations
            [1 ] Kyoto University
            Author notes
            Article
            10.14293/S2199-1006.1.SOR-.PPAYCO6.v1
            26acfb31-9939-4d70-9380-a7e261678410

            This work has been published open access under Creative Commons Attribution License CC BY 4.0 , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Conditions, terms of use and publishing policy can be found at www.scienceopen.com .

            Funding
            Japan Society for the Promotion of Science 20H03930

            General environmental science
            N,N-Diethyl-3-methylbenzamide,triclosan,acceptable daily intake,risk assessment,priotization

            References

            1. Zhong Mengmeng, Wang Tielong, Zhao Wenxing, Huang Jun, Wang Bin, Blaney Lee, Bu Qingwei, Yu Gang. Emerging Organic Contaminants in Chinese Surface Water: Identification of Priority Pollutants. Engineering. Vol. 11:111–125. 2022. Elsevier BV. [Cross Ref]

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