Method for evaluating complexing degree of soluble organic carbon with different molecular weights and heavy metals in water

A technique of dissolved organic carbon and evaluation method, which is applied in the direction of analyzing materials, measuring devices, material excitation analysis, etc., and can solve problems such as single detection direction, complicated detection method operation, and slow speed

Pending Publication Date: 2021-01-05
CAPITAL NORMAL UNIVERSITY
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The practical problem to be solved by the present invention is to provide an evaluation method for the degree of complexation between different molecular weight dissolved organic carbon and heavy metals in the water body, through the equilibrium dialysis simulation experiment. To observe the changes in the concentration of bound metals after the complexation of different molecular weight dissolved organic carbon and heavy metals in water bodies, and to evaluate the changes in water quality and the impact on human health through the sources and sinks of pollutants in water bodies where organic matter and heavy metals coexist

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for evaluating complexing degree of soluble organic carbon with different molecular weights and heavy metals in water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031]The actual water samples were taken and filtered through a 0.45 μm filter membrane to obtain a DOC solution for later use. All experiments were performed with deionized water as the external solution for control experiments, and each experiment was set up with three replicates; biofilm permeable bags (Spectra / Por CE, Fisher Scientific ) in a 500mL beaker, soaked in deionized water for 30min to remove sodium azide in the protective solution on the original permeation bag; add 400mL of CuSO4 (Cu2+concentration: 2 mg / L) to the beaker as the external solution; set up a control group, replace the heavy metal ion sulfate solution with deionized water as the external solution of the experiment; put an osmotic bag in each container, and add 10 mL of extracted The DOC solution is used as the internal solution, and then it is sealed with its own clip, and finally the beaker is sealed to prevent the external solution from evaporating; the beaker containing the external solution and...

example 2

[0033] The actual water samples were taken and filtered through a 0.45 μm filter membrane to obtain a DOC solution for later use. All experiments were performed with deionized water as the external solution for control experiments, and each experiment was set up with three replicates; biofilm permeable bags (Spectra / Por CE, Fisher Scientific ) in a 500mL beaker, soaked in deionized water for 30min to remove sodium azide in the protective solution on the original permeation bag; solution; set up a control group, replace the heavy metal ion sulfate solution with deionized water as the external solution of the experiment; put an osmotic bag in each container, and add 10 mL of extracted The DOC solution is used as the internal solution, and then it is sealed with its own clip, and finally the beaker is sealed to prevent the external solution from evaporating; the beaker containing the external solution and the internal solution is placed in a thermostat for reaction, and the exter...

example 3

[0035] The actual water samples were taken and filtered through a 0.45 μm filter membrane to obtain a DOC solution for later use. All experiments were performed with deionized water as the external solution for control experiments, and each experiment was set up with three replicates; biofilm permeable bags (Spectra / Por CE, Fisher Scientific ) in a 500mL beaker, soak in deionized water for 30min to remove sodium azide in the protective solution on the original osmosis bag; add 400 mL of MgSO4 (Mg 2+ concentration is 2 mg / L) to the beaker As an external solution; as a control group, use deionized water instead of heavy metal ion sulfate solution as the external solution of the experiment; put an osmotic bag in each container, and add 10 mL to the bag before the osmotic bag is completely immersed in the external solution. The extracted DOC solution is used as the internal solution, and then it is sealed with its own clip, and finally the beaker is sealed to prevent the external ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to an analysis method in the field of environmental monitoring, and particularly relates to a method for evaluating the complexing degree of soluble organic matters and metal ions in a water body. According to the invention, the concentration change of bound metal after complexing of soluble organic carbon with different molecular weights and heavy metals in the water body isobserved through an equilibrium dialysis simulation experiment, the concentration of total metal ions in an equilibrium solution is determined through atomic absorption spectrometry, and the concentration of free metal ions is determined through an ion electrode, so that the complexing degree of the DOC and the heavy metals in the water body can be quickly obtained, the fluorescence peak intensity change of the components in the water body is determined through the fluorescence spectrometry, the change information of fluorescence quenching caused by complexing of the specific components of the DOC in the water body under different molecular weights and the heavy metals can be rapidly analyzed. The method has better accuracy for a large amount of detection.

Description

technical field [0001] The invention belongs to an analysis method in the field of environmental monitoring, and in particular relates to an evaluation method for the degree of complexation between dissolved organic matter and metal ions in a water body. Background technique [0002] Heavy metals are stable, biotoxic, and bioaccumulative. Heavy metals in water systems not only exist in water bodies, but most of the heavy metals that enter water bodies are enriched in sediments under the action of factors such as adsorption, flocculation, and precipitation. In water bodies, dissolved organic carbon (DOC) is considered to be one of the main factors controlling the migration, transformation and fate of heavy metals. Since heavy metal pollution is closely related to its form, the degree of complexation between heavy metals and DOC can not only reflect the ability of heavy metals to combine with DOC, but also can be used to simply evaluate the binding state of heavy metals existi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/64G01N27/00
CPCG01N21/3103G01N21/643G01N27/00G01N2021/6432
Inventor 蒲晓高静张王虎董雪王新瑶王子康刘训良张瑞宁
Owner CAPITAL NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap