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Investigating the Toxicity of Acid Dyes From Textile Effluent Under Uv/Zno Process Using Daphnia Magna Publisher



Dehghani MH1, 2 ; Mahdavi P1 ; Tyagi I3 ; Agarwal S4 ; Gupta VK3, 4
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
  4. 4. Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa

Source: Desalination and Water Treatment Published:2016


Abstract

Some of textile wastewater dyes and their raw materials are carcinogenic for humans due to production of toxic aromatic amines. The toxicity measurement of the textile wastewater was analyzed using zinc oxide nanoparticles under ultraviolet irradiation process (UV/ZnO) and Daphnia magna bioassay was performed. D. magna has been evaluated as indicator to test effluent toxicity in dyes effluent. The impact of effective parameters such as zinc oxide nanoparticles load, pH, and exposure time were well investigated and optimized. It was found that increase in toxicity during the process is possibly due to the production of intermediate toxic compounds, presence of excessive hydrogen peroxide in the solution, presence of excessive ZnO in the solution, or ZnO toxicity or presence of excessive hydrogen peroxide in wastewater and consequent death of D. magna. Obtained experimental results revealed that toxicity increases during the nanophotocatalytic process. © 2016 Balaban Desalination Publications. All rights reserved.
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