Method for analyzing lead pollution source in water body deposit
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A sediment and pollution source technology, applied in the field of environmental geology, to achieve accurate calculation results, reduce the amount of data, and simplify the traceability process
Active Publication Date: 2019-06-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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[0004] The purpose of the present invention is to provide a method for analysis of lead pollution sources in water body sediments, thereby solving the aforementioned problems existing in the prior art
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Embodiment 1
[0028] This embodiment provides a method for analyzing the source of lead pollution in water body sediments, comprising the following steps:
[0029] S0, using geochemical baselines to differentiate natural and anthropogenic sources of lead in sediments;
[0030] S1, using a standardized method to establish a geochemical baseline model of lead in sediments in the area to be studied;
[0031] S2, calculating the lead geochemical baseline value of the research area and the corresponding lead geochemical baseline value of each sample based on the baseline model described in step S1;
[0032] S3, according to the sediment lead geochemical baseline value calculated in step S2 and the corresponding lead geochemical baseline value of each sample, calculate the average value of the anthropogenic contribution concentration and the corresponding anthropogenic contribution rate at each sampling point, and screen out The point corresponding to man-made lead, the lead concentration of the...
Embodiment 2
[0040] In this example, Daheiting Reservoir was taken as the research area, and a 7m-long sediment columnar sample was collected in a deep silted area, and cut into 92 sediment samples. Firstly, pre-treat the sediment, dry it with a freeze dryer, pass it through a 0.25mm nylon sieve, and then digest the mixed acid to measure the concentration of lead (Pb), lithium (Li) and other metals on the machine, and Pb is the target element , Li is an inert element and is used as a calibration element in the standardization method.
[0041] Sediment samples and columnar samples from the pretreated study area were analyzed for lead sources using the following procedure.
[0042] 1. First, according to the contents of Li and Pb in the 92 samples, a binary regression equation was made to determine the 95% confidence interval, and the points falling within the 95% confidence interval were screened out, and the concentration of Li and Pb was further A standardized method is used to establish...
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Abstract
The invention discloses a method for analyzing a lead pollution source in a water body deposit, wherein the method belongs to the field of environmental geology. The method comprises the steps of calculating a geochemistry baseline model, calculating an artificial contributed lead concentration, performing lead isotopc analysis based on ICP-MS, performing ratio analysis and executing a tracing process through combining two methods. The method breaks through a traditional tracing process and returns to tracing essence. The artificial contributed lead concentration which is screened by the geochemistry baseline is used for establishing correlation with a lead isotope ratio. Furthermore through the artificial contribution rate which is acquired through a geochemistry baseline equation and a lead isotope ratio, the contribution rates of lead from different sources in the deposit are calculated. The method overcomes defects such as large data volume, inaccurate traceability and incapabilityof performing accurate quantification in traditional heavy metal source analysis. The method is a combined lead isotope traceability method which has advantages of simple flow, easy operation and high quantification accuracy. Furthermore the method has wide application prospect for source analysis of the deposit sample in a complicated environment.
Description
technical field [0001] The invention relates to the field of environmental geography, in particular to a method for analyzing lead pollution sources in water body sediments. Background technique [0002] Metal elements in the environment have been widely concerned because of their high toxicity, refractory degradation and easy bioaccumulation through the food chain. In the water environment, 90% of the metal elements accumulate in the sediment or exist on its suspended particles. Sediments are sources and sinks of metal pollutants. To reduce the risk of sediments releasing metals into water bodies, research on the sources of metals is an important way to reduce pollutants in the water environment. Lead is considered to be a toxic metal element that affects human health and can biomagnify through food chains and food webs. Source apportionment of lead in the environment has been a hot topic in water environment research in the past few decades. In the past, the source ana...
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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/70G06F17/18
Inventor 高博徐东昱彭文启高丽
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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