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Percolate and method for judging bioavailability of heavy metals in water polluted thereby

A heavy metal and leachate technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems that are not suitable for large-scale measurement, expensive, complicated operation, etc., and achieve the effect of short time, simple and safe operation, and low analysis cost

Inactive Publication Date: 2013-04-03
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

Using DGT technology to measure the bioavailability of heavy metals in water has high accuracy, but the operation is complicated and expensive, and it is not suitable for large-scale determination

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  • Percolate and method for judging bioavailability of heavy metals in water polluted thereby
  • Percolate and method for judging bioavailability of heavy metals in water polluted thereby
  • Percolate and method for judging bioavailability of heavy metals in water polluted thereby

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0025] see figure 1 .

[0026] Sample Collection. Seven leachate samples were collected in different areas of a landfill in Beijing, diluted 50 times, and named as L1, L2, L3, L4, L5, L6, and L7; in addition, seven groundwater samples were collected in the landfill Samples, respectively named S1, S2, S3, S4, S5, S6, S7; S4 located in the landfill, S5, S6, S7 located upstream of the landfill, S1, S2, S3 located downstream of the landfill .

[0027] Sample pretreatment and dissolved organic carbon (DOC) determination. After the collected samples were centrifuged at 10000rpm at 4°C for 10min, the supernatant was collected and passed through a filter membrane with a pore size of 0.45μm, and the DOC concentration was measured with a total organic carbon analyzer. Adjust the double distilled water to 0<DOC<10mg / L, and the DOC of the other samples are all...

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Abstract

The invention discloses a percolate and a method for evaluating bioavailability of heavy metals in water polluted thereby. The method comprises the following main steps: collecting the percolate and / or water polluted by the percolate; extracting and purifying a sample; assaying and regulating the concentration of dissolved organic carbon (DOC) in the sample; assaying the heavy metal content of the regulated sample; performing three-dimensional fluorescence spectrum scanning on the regulated sample; performing parallel factor analysis on the scanning data; performing correlation analysis on the concentration of the heavy metals in the sample and a relative component concentration value obtained in the parallel factor analysis; and according to a result of the correlation analysis, evaluating the bioavailability of the heavy metals. The method is easy and safe to operate, short in required analysis time and low in analysis cost.

Description

technical field [0001] The invention belongs to the application field of solid waste treatment and recycling, and specifically relates to a method for indirectly evaluating the bioavailability of heavy metals by analyzing the structural characteristics of organic matter combined with heavy metals in leachate and its polluted water. Background technique [0002] In my country, due to the mixed collection of domestic waste, the addition of heavy metals to livestock and poultry feed, and the discharge of some industrial wastewater into municipal sewage treatment centers, organic waste, domestic waste, livestock and poultry manure, and municipal sludge all contain a certain amount of heavy metals. Landfill and composting are commonly used treatment methods for organic waste. During the landfill process, the heavy metals in domestic waste dissolve into the leachate. When the landfill leaks, the leachate containing heavy metals will pass through the soil in the vadose zone. Into g...

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Application Information

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IPC IPC(8): G01N21/64
Inventor 何小松席北斗李翔许其功潘红卫白顺果
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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