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Method for determining water-soluble Fe content of eutrophic lake

A technology for eutrophication and lake water, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of low measurement results, prolonging the filtration time, clogging the filter membrane, etc., and achieve the effect of accurate measurement results

Inactive Publication Date: 2014-07-09
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

However, for the determination of water-soluble Fe concentration in eutrophic lake water containing certain algae, if this method is used, there will be the following problems, that is: the algae contained in the water body will block the filter membrane, prolong the filtration time, and cause some water-soluble Fe concentration in the water sample Oxidation precipitation makes the measurement result low

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  • Method for determining water-soluble Fe content of eutrophic lake
  • Method for determining water-soluble Fe content of eutrophic lake
  • Method for determining water-soluble Fe content of eutrophic lake

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Embodiment

[0045] 1. Spatiotemporal selection of sample points: Select a typical area covered with algae in the Meiliang Bay Basin of Taihu Lake, set up 7 sampling areas, and conduct sampling once a month from June to September 2009.

[0046] 2. Spectral data collection: select 3 sampling points for each sampling area, and measure the spectral reflectance of the lake water body with a spectroradiometric spectrometer. Measured 10 times in a row.

[0047] 3. Determination of water-soluble Fe content and chlorophyll a content in lake water: collect water samples of 0-20cm water layer at each sampling point, use algae screening-suction filtration extraction device to conduct algae screening-suction filtration method to treat the water samples to be tested, and use adjacent The phenanthroline colorimetric method was used to determine the content of water-soluble Fe in water samples. After the water samples were filtered through Whatman GF / F filter paper, the filtered phytoplankton was used...

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Abstract

The invention provides a method for determining the water-soluble Fe content of a eutrophic lake. The method includes: selecting a eutrophic lake typical region with the water surface covered with alga, determining the reflection spectrum information of the water body in the selected region by a spectral radiation spectrometer, collecting a 0-20cm water layer water sample at each sampling point, and determining the content of water-soluble Fe and chlorophyll a in the water samples; then converting the determined reflection spectrum information into spectral characteristic parameters, subjecting the spectral characteristic parameters and the content of water-soluble Fe and chlorophyll a to correlation analysis by SPSS software, selecting parameters in significant correlation with the content of water-soluble Fe and chlorophyll a of the water body to serve as spectral characteristic factors representing dynamic change of the water body's water-soluble Fe content, establishing a correlation model of the spectral characteristic factors and the water body's water-soluble Fe content, and determining the spectral characteristic factors of the to-be-tested samples, thus obtaining the dynamic content of the water body's water-soluble Fe. The method provided by the invention provides a theoretical basis for remote sensing monitoring of the water-soluble Fe content of a lake water body.

Description

technical field [0001] The invention relates to a method for measuring the content of water-soluble Fe, in particular to a method for measuring the content of water-soluble Fe in eutrophic lakes. Background technique [0002] The eutrophication of lakes has attracted more and more attention, and the management of eutrophic lakes has become a hot and difficult issue in current research. Based on the principle of limiting factors, the current domestic control of the input of exogenous nitrogen, phosphorus and other nutrient salts is carried out. However, the eutrophication of lake water is still becoming more and more serious. Fe is an essential micronutrient element for the growth of aquatic plants and phytoplankton algae. During the growth of phytoplankton, Fe is required for electron transfer, nitrogen absorption and utilization, photosynthesis of chlorophyll, respiration, etc., and Fe can also promote planktonic growth. Absorption of other nutrients by plants. In 1990, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 迟光宇郑太辉史奕陈欣
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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