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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 matter, and cannot be extracted and separated according to the required molecular weight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 20L Taihu Lake water sample, filter it with medical gauze, ordinary filter paper, and cellulose acetate filter membrane with a pore size of 2.0 μm and 0.3 μm, and finally adjust the pH of the water sample 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 cm, fill it with XAD-4 macroporous resin, the resin height is 30 cm (height-diameter ratio is 5), the adsorption temperature is room temperature, the adsorption flow rate is 1BV / h, and the filtrate treatment capacity reaches 4239 Milliliter (filtrate processing capacity is 5 times of resin volume) stops adsorption after. After the adsorption of the filtrate is completed, wash the column with ultrapure water until there is no residual chloride ion in the column, and use AgNO 3 Check the solution until the column water has no precipitation.

[0019] The sodium hydroxide solution with a concentration of 0.05mol / L is ...

Embodiment 2

[0024] Take 20L Taihu Lake water sample, filter it with medical gauze, ordinary filter paper, and cellulose acetate filter membrane 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 macroporous resin, the resin height is 90mm (the aspect ratio is 15), the adsorption temperature is room temperature, the adsorption flow rate is 3BV / h, and the filtrate treatment capacity reaches 25434 Milliliter (filtrate processing capacity is 10 times of resin volume) stops adsorption after. After the adsorption of the filtrate is completed, wash the column with ultrapure water until there is no residual chloride ion in the column, and use AgNO 3 Check the solution until the column water has no precipitation.

[0026] The sodium hydroxide solution with a concentration of 0.2mol / L is used...

Embodiment 3

[0031] Take 20L Taihu Lake water sample, filter it with medical gauze, ordinary filter paper, cellulose acetate filter membrane with a pore size of 2.5 μm and 0.5 μm, 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 macroporous resin, the height of the resin is 60mm (the aspect ratio is 10), the adsorption temperature is room temperature, the adsorption flow rate is 5BV / h, and the filtrate treatment capacity reaches 25434 After milliliter (filtrate treatment capacity is 15 times of resin volume), stop adsorption. After the adsorption of the filtrate is completed, wash the column with ultrapure water until there is no residual chloride ion in the column, and use AgNO 3 Check the solution until the column water has no precipitation.

[0033] The sodium hydroxide solution with a concentration of 0.1mol / L is use...

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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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