Nature Environment and Pollution Technology

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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Yawen Wu ¹, Shengnan Zhu ¹, Weirong Bai ¹, Guangjun Wen ¹, Wei Xu ¹, Huyin Huai ¹

Affiliations
1 College of Bioscience and Biotechnology, Yangzhou University, Yangzhou-225 009, CN

Abstract

There is growing concern about the impact of cooking oil fume condensates (COFCs) on the environment, including on the growth of plants. COFCs contain a wide range of chemical constituents which are closely related to the temperature of cooking oil. Among these components, hydrocarbons are believed to be among the most toxic. Dodecane is one of the principal hydrocarbons implicated. The paper deals with the experiments carried out in laboratory to clarify the toxic effects of COFCs, adding various amounts of dodecane to aquatic solutions in dishes containing the floating aquatic plant Salvinia natans. Inhibitory effects on the vegetative growth of S. natans, i.e. on the development of leaves and buds are reported in the experiments. The production of new leaves is significantly inhibited. The percent inhibition of growth rate (%) in the number of leaves produced is significantly correlated with the concentration of dodecane. LC₅₀ values on day 4 and day 16 after treatment are 190 mg/L and 181 mg/L respectively. Dodecane has no effect on the pH values of test solutions. It is concluded that dodecane has significant effects on the vegetative growth of aquatic plants. S. natans is sensitive to dodecane and might be useful as an indicator of dodecane and thus COFCs pollution.

Keywords

COFCs, Dodecane, Salvinia natans, Aquatic ecosystem, Pollution.

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