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Determination method for ecological risks of polycyclic aromatic hydrocarbon in water body

A polycyclic aromatic hydrocarbon and ecological risk technology, which is applied in the direction of testing organic pollutants in water, general water supply conservation, and testing water, can solve problems such as lack of environmental standards, inability to determine ecological risks, and insufficient basis for ecological environment supervision, etc., to achieve expansion range effect

Inactive Publication Date: 2014-03-19
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

[0009] Aiming at the current lack of environmental standards for polycyclic aromatic hydrocarbons in surface water, the insufficient basis for ecological environment supervision, and the inability to determine the existing ecological risks, the present invention establishes an ecological risk of polycyclic aromatic hydrocarbons in water based on toxic equivalent factors and Monte Carlo simulation. The determination method is applicable to the determination of the pollution degree and ecological risk of polycyclic aromatic hydrocarbons in environmental water bodies

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  • Determination method for ecological risks of polycyclic aromatic hydrocarbon in water body

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Embodiment 1

[0024] Ecological risk determination of polycyclic aromatic hydrocarbons in a lake water body:

[0025] (1) Screen representative species of the lake: Based on the investigation of local species and considering the availability of corresponding toxicity data, six representative species were comprehensively selected: Chlorella, Chironomus, Daphnia magna, Mussel, Frog, Barb;

[0026] (2) Obtain the toxicity data of benzo-a-pyrene: in the PAN Pesticide Database and EPA EcoTox database, collect the chronic toxicity data of benzo-a-pyrene of representative species, see Table 1;

[0027] (3) Calculating the benzo-a-pyrene concentration value HC of 95% species in the protected water ecosystem 5 : Logarithmically transform the toxicity data in Table 1 to obtain the arithmetic mean X m 3.77ug / L, standard deviation S m is 4.95ug / L, apply the formula HC 5 =exp(X m -K L S m ) calculation, where the adjustment coefficient K L is 1.81 (from public literature reports: Aldenberg and S...

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Abstract

The invention discloses a determination method for ecological risks of a polycyclic aromatic hydrocarbon in a water body and belongs to the field of determination of ecological risks. The determination method comprises the following steps: (1) representative species of a water ecological system in a region are screened; (2) toxicity data of benzoapyrene is obtained; (3) benzoapyrene concentration values HC5 of 95% of species of the water ecological system are calculated; (4) the varieties of polycyclic aromatic hydrocarbon pollutants and corresponding environmental concentrations are determined by sampling and concentration distribution characteristics of various polycyclic aromatic hydrocarbons are analyzed; (5) ecological risk quotient values RQi of the specific polycyclic aromatic hydrocarbon pollutants are calculated; and (6) a total ecological risk quotient value RQt is calculated and the specific ecological risks are defined. According to the determination method, whether potential risks of the polycyclic aromatic hydrocarbon pollutants can be accepted or not can be analyzed and whether the total level of the ecological risks of the water body needs to be controlled or not can be judged so that scientific evidences and the like is provided for making protection measures for the water ecological system and making control measures for polycyclic aromatic hydrocarbon pollution.

Description

technical field [0001] The invention relates to a method for determining the ecological risk, more specifically a method for determining the ecological risk of polycyclic aromatic hydrocarbons in water. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are an important class of environmental pollutants, which are produced in human activities such as industrial processes, anoxic combustion, waste incineration and landfills, food production, and traffic emissions. Currently, they are widely present in various environmental media such as water bodies. PAH pollutants are carcinogenic, teratogenic, mutagenic and biorefractory, posing a threat to ecosystems and human health. Therefore, more and more attention has been paid to their pollution control and risk prevention. [0003] Studies have shown that my country's main rivers are polluted by polycyclic aromatic hydrocarbons to varying degrees. However, my country's water environment quality standard system do...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/1826G01N33/1833Y02A20/20
Inventor 曲常胜李冰吴海锁王水
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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