Method for extraction separation of dissoluble organic matters in fresh water

A technology of dissolved organic matter and separation method, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. It can solve the problems of low extraction rate of dissolved organic matter, inability to extract and separate, etc., and achieve fast sample loading , high elution rate and large adsorption capacity

Inactive Publication Date: 2016-02-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods generally have a low extraction rate of dissolved organic ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] The technical solutions of the present invention are described below with specific embodiments, but the protection scope of the present invention is not limited thereto: Embodiment 1

[0017] A 20L water sample from Taihu Lake was taken and filtered with medical gauze, ordinary filter paper, and cellulose acetate filter membranes with a pore size of 2.0 μm and 0.3 μm. Finally, the pH of the water sample was adjusted to 1.5 with analytically pure dilute hydrochloric acid to obtain a pretreatment solution.

[0018] Take a chromatographic column with a diameter of 6.0 centimeters, fill with XAD-4 type macroporous resin, the resin height is 30 centimeters (height-diameter ratio is 5), the adsorption temperature is room temperature, the adsorption flow rate is 1BV / h, and the filtrate processing capacity reaches 4239 The adsorption was stopped after milliliters (the amount of filtrate treated was 5 times the volume of the resin). After the adsorption of the filtrate was compl...

Example Embodiment

[0023] Example 2

[0024] Take a 20L water sample from Taihu Lake, filter it with medical gauze, ordinary filter paper, and cellulose acetate filter membranes with a pore size of 2.5 μm and 0.5 μm, and finally adjust the pH of the water sample to 2.5 with analytically pure dilute hydrochloric acid to obtain a pretreatment solution.

[0025] Take a chromatographic column with a diameter of 6.0 cm, fill it with XAD-4 type macroporous resin, the resin height is 90 inside (the height-diameter ratio is 15), the adsorption temperature is room temperature, the adsorption flow rate is 3BV / h, and the filtrate processing capacity reaches 25434 The adsorption was stopped after milliliters (the amount of filtrate treated was 10 times the volume of the resin). After the adsorption of the filtrate was completed, the column was washed with ultrapure water until no chloride ions remained in the column. 3 The solution is checked until the column water has no precipitation.

[0026] Desorptio...

Example Embodiment

[0030] Example 3

[0031] Take a 20L water sample from Taihu Lake, filter it with medical gauze, ordinary filter paper, and cellulose acetate filter membranes with pore sizes of 2.5 μm and 0.5 μm, respectively, and finally adjust the pH of the water sample to 2.0 with analytically pure dilute hydrochloric acid to obtain a pretreatment solution.

[0032]Take a chromatographic column with a diameter of 6.0 cm, fill it with XAD-4 type macroporous resin, the resin height is 60 inside (height-diameter ratio is 10), the adsorption temperature is room temperature, the adsorption flow rate is 5BV / h, and the filtrate processing capacity reaches 25434 The adsorption was stopped after the amount of filtrate was 15 times the volume of the resin. After the adsorption of the filtrate was completed, the column was washed with ultrapure water until no chloride ions remained in the column. 3 The solution is checked until the column water has no precipitation.

[0033] Desorption was carried ...

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PUM

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Abstract

The invention relates to a method for extraction separation of dissoluble organic matters in fresh water. The conventional method for extraction of organic matters in fresh water has a low extraction rate and does not realize extraction and separation according to required molecular weight. The method is characterized by comprising filtration impurity removal, adsorption separation, rotary evaporation condensation, dialysis grading and freeze drying. The method has large adsorption quantity, a fast sample loading rate and a high elution rate, realizes separation according to molecular weight and produces dissoluble organic matters in different molecular weight scopes.

Description

technical field [0001] The invention relates to a method for extracting and separating dissolved organic matter in fresh water. Background technique [0002] Dissolved organic matter (DOM, dissolved organic matter) is widely distributed in water, soil and sediment, and evolved from the remains of plants and animals through complex physical, chemical and biological processes. DOM has an impact on many environmental problems such as the availability, toxicity and migration characteristics of heavy metals and organic pollutants in natural water bodies, and is also the main precursor of disinfection by-products generated during the chlorination of drinking water. It has the ability to absorb ultraviolet rays, affects the penetration of light, and can protect aquatic organisms in water bodies. DOM can also be used as a source of nutrition for some microorganisms, especially in water bodies. Some microorganisms cannot use macromolecular organic matter. It may be that some simple ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/30
CPCC02F9/00C02F1/001C02F1/04C02F1/22C02F1/285C02F1/288C02F1/44C02F1/68C02F2101/30
Inventor 李非里金赞芳贾建洪方小满
Owner ZHEJIANG UNIV OF TECH
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