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Issue 9, 2017
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Effect of low-purity Fenton reagents on toxicity of textile dyeing effluent to Daphnia magna

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Abstract

This study aimed to identify the source of toxicity in textile dyeing effluent collected from February to July 2016, using Daphnia magna as a test organism. Toxicity identification evaluation (TIE) procedures were used to identify the toxicants in textile dyeing effluent, and Jar testing to simulate the Fenton process was conducted to identify the source of toxicants. Textile dyeing effluent was acutely toxic to D. magna [from 1.5 to 9.7 toxic units (TU)] during the study period. TIE results showed that Zn derived from the Fenton process was a key toxicant in textile dyeing effluent. Additionally, Jar testing revealed that low-purity Fenton reagents (FeCl2 and FeSO4), which contained large amounts of Zn (89 838 and 610 mg L−1, respectively), were the source of toxicity. Although we were unable to conclusively identify the residual toxicity (approx. 1.4 TU of 9.71 TU) attributable to unknown toxicants in textile dyeing effluent, the findings of this study suggest that careful operation of the Fenton treatment process could contribute to eliminating its unintended toxic effects on aquatic organisms.

Graphical abstract: Effect of low-purity Fenton reagents on toxicity of textile dyeing effluent to Daphnia magna

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Publication details

The article was received on 14 Feb 2017, accepted on 05 Jul 2017 and first published on 06 Jul 2017


Article type: Paper
DOI: 10.1039/C7EM00078B
Citation: Environ. Sci.: Processes Impacts, 2017,19, 1169-1175
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    Effect of low-purity Fenton reagents on toxicity of textile dyeing effluent to Daphnia magna

    J. Na, J. Yoo, G. Nam and J. Jung, Environ. Sci.: Processes Impacts, 2017, 19, 1169
    DOI: 10.1039/C7EM00078B

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