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Classification extraction method for fulvic acid subfractions in water

A technology for fractional extraction of fulvic acid subcomponents, which is applied in the field of separation and extraction of fulvic acid subcomponents, and can solve problems such as no related reports on fractional extraction

Inactive Publication Date: 2015-11-11
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the fractional extraction of fulvic acid subcomponents in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Fractional extraction of fulvic acid subcomponents in river water bodies in the suburbs of Beijing:

[0043] In September 2014, water samples from rivers in the suburbs of Beijing were taken, and the water contained a large amount of algae and suspended particles;

[0044] XAD-8 resin column; Sigma company;

[0045] Sodium hydroxide: analytically pure; hydrochloric acid: analytically pure; sodium pyrophosphate: analytically pure;

[0046] The specific extraction steps of the present embodiment are as follows:

[0047] Step a: Acidification and filtration of water samples:

[0048] Use 6mol / L hydrochloric acid and 6mol / L sodium hydroxide to adjust the pH of the water solution to 1.0, filter with a filter membrane with a pore size of 0.45μm, and mark the obtained filtrate as a filtered water sample, totaling 1000L;

[0049] Step b: Resin adsorption of fulvic acid in water:

[0050] Pass 2000L of water samples through the XAD-8 resin column at a flow rate of...

Embodiment 2

[0079] Embodiment 2: This embodiment discloses a method for fractional extraction of fulvic acid subcomponents in a water body. The fractional extraction method includes the following steps:

[0080] Step a: Acidification and filtration of water samples: adjust the pH of the water sample to 0.5-1.5 with alkali and acid, filter with a filter membrane, and mark the obtained filtrate as a filtered water sample;

[0081] Step b: Resin adsorption of fulvic acid in water: pass the filtered water sample through the resin column at a flow rate of 10-15 times the column volume / h, and discard the effluent;

[0082] Step c: Fractional elution of fulvic acid subcomponents: at a flow rate of 5-10 times the column volume / h, rinse the resin column with a sodium pyrophosphate buffer solution with pH = 2, collect 2-50ml of the effluent, and use a specific wavelength Measured by ultraviolet / visible light, the ultraviolet / visible absorbance value of the effluent liquid increases first and then d...

Embodiment 3

[0098] Embodiment 3: the difference between this embodiment and embodiment 2 is that step f is also included in this embodiment: take the solid fulvic acid subcomponent 1 to solid fulvic acid subcomponent 12 obtained in step e, respectively at 80 After drying at -100°C for 20-40h, burn at 550°C for 5h, and then measure the ash content of each solid fulvic acid subcomponent;

[0099] If the ash content of one of the solid fulvic acid subcomponents is greater than 1.0% by dry weight, then the solid fulvic acid subcomponents are dissolved with 0.1mol / L hydrochloric acid, and the operations of steps d, e and f are repeated until the ash content is less than 1.0%.

[0100] The fractional extraction method also includes step g: taking the solid fulvic acid subfraction 1 to solid fulvic acid subfraction 12 obtained in step e, drying them at 80-100°C for 20-40h respectively, and spectroscopically using ammonium molybdate The phosphorus content of the solid fulvic acid subcomponent is...

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PUM

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Abstract

The invention discloses a classification extraction method for fulvic acid subfractions in water. The classification extraction method comprises the following steps that a, a water sample is acidized and filtered; b, resin adsorption is carried out on water fulvic acid; c, classification leaching is carried out on the fulvic acid subfractions; d, the fulvic acid subfractions are purified; e, the water fulvic acid subfractions are desalted and cured. In this way, a fulvic acid solution can be extracted from the water, and after the fulvic acid subfractions are classified and cured based on the resin separation technology, finally the classified solid fulvic acid subfractions are obtained.

Description

Technical field [0001] The invention involves the separation and extraction technology of Fuli acid sub -components, which specifically involves a grading method of a richly rich in the water body. Background technique [0002] FulvicAcid is a large molecular organic mixture formed by the residual body of the animals and plants through complex physics, chemistry, and biological processes. It exists in environmental media such as water body, soil, and sediment.Fryic acid sub -components can be dissolved in alkaline and neutral solutions, and insoluble in acid, which is an important part of the organic matter of water bodies. [0003] Fryic acid contains a large amount of activity function such as carboxyl, phenol hydroxyl, cymbal, amino, and cymbal groups, which has high reaction activity and plays an important role in the water environment.For example, picillic acid can interact with toxic heavy metal ions and organic pollutants in water (such as pesticides, PPCPS, and PAHS) to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 白英臣吴丰昌符志友宋凡浩陈曲
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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