Nature Environment and Pollution Technology

Guangjun Wen ¹, Weirong Bai ¹, Zhongshi Hao ¹, Wei Xu ¹, Huyin Huai ¹

Affiliations
1 College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, 225009, CN

Abstract

The ecotoxicological effects of aniline on Lemna minor have been evaluated based on both morphological and physiological responses in this paper. The results showed a significant inhibition to frond number and area, growth index, and biomass of L. minor. The contents of both chlorophyll a and b went down significantly after exposure to aniline. Aniline shows an acute toxic effect on the vegetative growth of L. minor and the effect is correlated with its concentration. Aniline might impact the growth of L. minor through destroying its photosynthesis. The activities of CAT, POD and SOD shown different responses to aniline at different times, but higher concentration of aniline and persistence would be more harmful to L. minor according to the changes of the activities of antioxidant enzymes. L. minor could be used as an indicator to monitor the existence of aniline in water bodies.

Keywords

Lemna minor, Aniline, Cotoxicological Effects, Physiological Response.

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Shengnan Zhu ¹, Yawen Wu ¹, Guangjun Wen ¹, Weirong Bai ¹, Zhongshi Hao ¹, Huyin Huai ¹

Affiliations
1 College of Bioscience and Biotechnology, Yangzhou University, Yangzhou-225009, CN

Abstract

Hexadecane is one of the main chemical compounds in Cooking Oil Fume Condensates (COFCs), which has been proved to influence the vegetative growth of Salvinia natans (L.) All. significantly. Its effects on the growth of S. natans were studied by using static toxicity testing method in this paper. The results showed that relative growth rate (RGR), leaves, buds and stems of S. natans were inhibited significantly when exposed to higher concentrations. Hexadecane could accelerate the leaves of S. natans becoming yellow or decomposed. Biomass went down with the increase of hexadecane concentrations. The LC₅₀ on day 4 and day 12 after treatment were 275 mg/L and 244 mg/L, respectively. Hexadecane had no effect on the pH value and conductivity of the cultivation medium. It can be concluded that hexadecane would significantly affect the vegetative growth of S. natans., and S. natans is sensitive to hexadecane that might be useful as an indicator of hexadecane pollution in freshwater.

Keywords

COFCs, Hexadecane, Pollution, Salvinia natans, Vegetative Growth.

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Shengnan Zhu ¹, Yawen Wu ¹, Guangjun Wen ¹, Weirong Bai ¹, Zhongshi Hao ¹, Huyin Huai ¹

Affiliations
1 College of Bioscience and Biotechnology, Yangzhou University, Yangzhou-225009, CN

Abstract

Hexadecane is one of the main chemical compounds in Cooking Oil Fume Condensates (COFCs), which has been proved to influence the vegetative growth of Salvinia natans (L.) All. significantly. Its effects on the growth of S. natans were studied by using static toxicity testing method in this paper. The results showed that relative growth rate (RGR), leaves, buds and stems of S. natans were inhibited significantly when exposed to higher concentrations. Hexadecane could accelerate the leaves of S. natans becoming yellow or decomposed. Biomass went down with the increase of hexadecane concentrations. The LC₅₀ on day 4 and day 12 after treatment were 275 mg/L and 244 mg/L, respectively. Hexadecane had no effect on the pH value and conductivity of the cultivation medium. It can be concluded that hexadecane would significantly affect the vegetative growth of S. natans., and S. natans is sensitive to hexadecane that might be useful as an indicator of hexadecane pollution in freshwater.

Keywords

COFCs, Hexadecane, Pollution, Salvinia natans, Vegetative Growth.

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