Method for identifying ecological risks of pesticides in water body

A technology of ecological risk and identification method, which is applied in the direction of testing water, special data processing applications, instruments, etc., and can solve the problems of unretrieved literature on ecological risk identification

Active Publication Date: 2010-05-26
NANJING UNIV
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Problems solved by technology

At present, no mature literature on eco...

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  • Method for identifying ecological risks of pesticides in water body
  • Method for identifying ecological risks of pesticides in water body
  • Method for identifying ecological risks of pesticides in water body

Examples

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Embodiment 1

[0033] Ecological Risk Identification of Pesticides in Taihu Lake Water:

[0034] 1. Determine the types of pesticides present in the water body of Taihu Lake

[0035] Water samples were collected for analysis, and 8 pesticides including atrazine, DDT, dichlorvos, dimethoate, lindane, malathion, parathion, and methyl parathion were detected in the water body of Meiliang Bay in the northeast of Taihu Lake.

[0036] 2. Screen representative species in Taihu Lake water ecosystem

[0037] Aiming at the characteristics of the Taihu Lake ecosystem and considering the availability of corresponding toxicity data, nine representative species were comprehensively selected. Including algae representing phytoplankton, magna magna, fleas, and long arm shrimp representing zooplankton, culex and chironomid representing insects, carp, catfish, medaka representing fish.

[0038] 3. Collect concentration data and toxicity data

[0039] Collect the concentration data of 8 kinds of pesticides ...

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Abstract

The invention discloses a method for identifying ecological risks of pesticides in water body, and belongs to the field of ecological risk identification. The method comprises the following steps: determining the types of the pesticides in the water body; screening representative biological species in an aquatic ecosystem; acquiring toxicity data of the pesticides in an area to be identified; andcalculating a concentration value HC5 for protecting 95 percent of the species in the aquatic ecosystem by a probability risk assessment method; calculating risk quotients of various pesticides and performing risk prioritizing; applying the toxicity data to the probability risk assessment method to calculate the total level of the ecological risks of the pesticides in the area to be identified; and identifying according to a result. The method combines the conventional risk quotient method and probability risk assessment method, and realizes the quantification of the total level of the ecological risks of the pesticides in the water body by screening the representative biological species in the aquatic ecosystem and utilizing less toxicity data so as to provide decisive basis for protecting the aquatic ecosystem.

Description

technical field [0001] The invention relates to a method for identifying ecological risks, more specifically, a method for identifying risks caused by pesticide residues in water bodies to ecological systems. Background technique [0002] With the rapid development of economy and society and the continuous improvement of the level of agricultural modernization, pesticides such as herbicides and insecticides are widely used in agricultural production. Through agricultural non-point source pollution, industrial production wastewater discharge, and natural volatilization residues, a large amount of pesticides enter natural water bodies. These pesticide pollutants inevitably have harmful effects on aquatic organisms and amplify this effect through the cumulative effect of the food chain. Therefore, the ecological risk identification of aquatic ecosystems for pesticides, the quantification of ecological risk levels, and the identification of dangerous pesticide types can provide...

Claims

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Application Information

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IPC IPC(8): G01N33/18G06Q10/00G06F19/00
Inventor 毕军曲常胜黄蕾李凤英
Owner NANJING UNIV
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