Department of Environmental Science, Urmia Lake Research Institute, Urmia University, Urmia, Iran.
Environ Sci Pollut Res Int. 2019 Sep;26(27):27699-27711. doi: 10.1007/s11356-019-05898-1. Epub 2019 Jul 23.
In the present study, the ability of duckweed (Lemna minor L.) in the decolorization of Acid Bordeaux B (ABB), as an aminoazo benzene dye, from polluted waters was evaluated. It was found that the rise of temperature and enhancement of the plant initial weight led to increasing the dye removal efficiency, but raising the initial dye concentration and pH reduced it. However, in the optimum conditions, the plant exhibited a considerable potential for the phytoremediation of ABB by 94%. The comparison of the experimental dye removal efficiency with its predicted amounts from ANN (R = 0.99) showed that ANN supplied the appropriate predictive performance. Inhibition of the plant growth and reduction of the chlorophyll (Chl) a, b, and a+b content (around 26%, 32.4%, and 28.6%, respectively) after plant treatment with 40 mg/L of ABB confirmed its toxic effects on the plant in high concentrations. Antioxidant enzyme activities and contents of malondialdehyde, phenol, and flavonoids were also raised by the augmentation of the ABB concentration. As a result of the ABB biodegradation pathway, seven intermediate compounds were identified using GC-MS analysis.
在本研究中，评估了浮萍（Lemna minor L.）对污染水中酸性媒介红 B（ABB）的脱色能力，ABB 是一种偶氮苯染料。结果发现，温度升高和植物初始重量增加会提高染料去除效率，但提高初始染料浓度和 pH 值会降低去除效率。然而，在最佳条件下，植物对 ABB 的植物修复表现出相当大的潜力，去除率为 94%。实验染料去除效率与 ANN 预测值（R = 0.99）的比较表明，ANN 提供了适当的预测性能。ABB 对植物的抑制作用和叶绿素（Chl）a、b 和 a+b 含量的降低（分别约为 26%、32.4%和 28.6%）证实了其在高浓度下对植物的毒性作用。抗氧化酶活性和丙二醛、酚和类黄酮的含量也随着 ABB 浓度的增加而升高。通过 GC-MS 分析，确定了 ABB 生物降解途径中的七种中间化合物。
