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Published online 16 October 2007
Published in J Environ Qual 36:1591-1598 (2007)
DOI: 10.2134/jeq2006.0433
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
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Investigation of the Toxicity of the Products of Decoloration of Amaranth by Trametes versicolor

Mihaela Gavrila,* and Peter V. Hodsonb

a Dep. of Chemical Engineering, Queen's Univ., Kingston, Ontario, Canada K7L 3N6
b School of Environmental Studies, Queen's Univ., Kingston, Ontario, Canada K7L 3N6


Figure 1
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  		Fig. 1. Variation of toxicity with Amaranth concentration. Toxicity calculated for the 50% effect and 15-min exposure time (TU50, 15 min) as 100/EC50. Three measurements/mean and 95% confidence level.

 

Figure 2
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  		Fig. 2. Variation of Amaranth concentration, pH, and dissolved oxygen in treatment, control and boiled treatment during the decoloration of 2000 mg L–1 Amaranth by Trametes versicolor. BDA, before dye addition; ADA, after dye addition. Three measurements/mean and 95% confidence level.

 

Figure 3
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  		Fig. 3. Variation of toxicity in time for the decoloration of 2000 mg L–1 Amaranth by Trametes versicolor. Toxicity assays performed on samples with their original pH (a) and on pH adjusted to be between 6 and 8 (b). Toxicity calculated for the 50% effect and 15-min exposure time (TU50, 15 min) as 100/EC50. CC = chemical components. Three measurements/mean and 95% confidence level.

 

Figure 4
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  		Fig. 4. Variation of toxicity (ph adjusted samples), ph and absorbance in time during the decoloration of 2000 mg L–1 amaranth by trametes versicolor. Bda = before dye addition. Ada = after dye addition. Toxicity calculated for the 50% effect and 15 minutes exposure time (tu50, 15 min) as 100/ec50. Three measurements/mean and 95% confidence level.

 




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