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Humic acid-modified clay adsorbent and preparation method thereof

A clay adsorption and humic acid technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex process, high price, and few applications, and achieve the effect of simple process, easy recycling, and easy-to-obtain raw materials

Inactive Publication Date: 2018-12-14
湖南慧谷农业生态研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, organic matter can be loaded on the surface of clay through organic modification, so that it can obtain better adsorption effect and adsorption selectivity, but commonly used ones such as chitosan and cetyltrimethylammonium bromide (CTMAB) The price is higher, the process is complicated, and the application is less

Method used

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  • Humic acid-modified clay adsorbent and preparation method thereof
  • Humic acid-modified clay adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Add attapulgite to sulfuric acid with a concentration of 1mol / L at a mass ratio of 1:10, activate at 25°C for 30 minutes, filter after activation, and wash the obtained filter residue with deionized water for several times until The obtained lotion reacts with NaOH without precipitation (that is, it is washed until there is no metal ion), and it is dried and pulverized to obtain acidified clay;

[0033] 2) Add the acidified clay to the NaOH solution with a concentration of 4% at a mass ratio of 1:10, modify it at 25°C for 30 minutes, filter after modification, dry and pulverize to obtain alkali metal ionized clay;

[0034] 3) Add 10% mineral humic acid to the filtrate in the alkali metal ionization process, stir and react at 90°C for 40 minutes, and filter to obtain a solution containing humic acid;

[0035] 4) Add alkali metal ionized clay to the solution containing humic acid at a mass ratio of 1:20, modify it at 25°C for 60 minutes, filter after modification, wash...

Embodiment 2

[0037] 1) Add attapulgite to hydrochloric acid with a concentration of 1mol / L at a mass ratio of 1:5, activate at 25°C for 30 minutes, filter after activation, and wash the obtained filter residue with deionized water for several times until The obtained lotion reacts with NaOH without precipitation (that is, it is washed until there is no metal ion), and it is dried and pulverized to obtain acidified clay;

[0038] 2) Add acidified clay to 1% NaOH solution at a mass ratio of 1:5, modify at 25°C for 30 minutes, filter after modification, dry and pulverize to obtain alkali metal ionized clay;

[0039] 3) Add 10% mineral humic acid to the filtrate in the alkali metal ionization process, stir and react at 90°C for 40 minutes, and filter to obtain a solution containing humic acid;

[0040] 4) Add alkali metal ionized clay to the solution containing humic acid at a mass ratio of 1:10, modify at 25°C for 60 minutes, filter after modification, wash the obtained filter residue with de...

experiment example 3

[0042] The attapulgite is dried and pulverized to obtain an unmodified attapulgite adsorbent.

[0043] Take each 0.1 g of the humic acid modified clay adsorbent prepared in Examples 1 and 2 and the unmodified attapulgite adsorbent prepared in Example 3, and add 50 mL of them at a concentration of 20 mg / L and 40 mg / L , 60 mg / L, 80 mg / L, 100 mg / L, 120 mg / L containing Cd 2+ Wastewater is subjected to adsorption treatment at a temperature of 25°C, a stirring speed of 160r / min and an adsorption time of 24h. The experimental results are shown in figure 1 , figure 2 .

[0044] Under the same conditions, the saturated adsorption capacity of Examples 1-3 were 48.66 mg / g, 36.42 mg / g and 29.16 mg / g respectively. The comparison shows that the saturated adsorption capacity of the humic acid modified clay adsorbent prepared in Example 1 is 1.67 times that of the unmodified attapulgite adsorbent in Example 3. Cd in wastewater 2+ With the increase of cadmium concentration, the removal r...

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Abstract

The invention provides a humic acid-modified clay adsorbent and a preparation method thereof. The preparation method mainly comprises: adding a clay material into an acid liquid, carrying out activation treatment, carrying out filtration to obtain a filtrate A and filter residues B, fully cleaning the filter residues B through water, carrying out drying and crushing to obtain acidified clay, adding the acidified clay into an alkali solution, carrying out alkali metal ionization treatment, carrying out filtration to obtain a filtrate C and filter residues D, drying and crushing the filter residues D to obtain alkali metal ionized clay, adding ore source humic acid into the filtrate C, carrying out stirring treatment and filtration to obtain a humic acid solution, adding the alkali metal ionized clay into the humic acid solution, carrying out modification and filtration and carrying out drying and crushing to obtain the humic acid-modified clay adsorbent. The preparation method has simple processes and realizes a low cost. The humic acid-modified clay adsorbent is easy to settle and recover, is environmentally friendly, has good adsorption performances and is suitable for industrialwastewater treatment and soil remediation.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a humic acid modified clay adsorbent and a preparation method thereof. Background technique [0002] With the rapid development of industrialization and urbanization in our country, improper treatment and large discharge of pollutants, use of unqualified agricultural substances, etc., have led to the increasingly prominent problem of heavy metal pollution in my country's soil, rivers, and amber. The accumulation of heavy metals in water and soil makes heavy metals endanger human health through drinking water and food. Adsorption is one of the most commonly used methods to treat pollutants by using the adsorption of porous solid substances. Activated carbon has long been the most conventional adsorption material. Although activated carbon has a wide range and can adsorb most heavy metals, organic matter and biopolymers, the high price and high operating cost of activated carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/12B01J20/24
Inventor 文亚雄郭帅谭石勇谭武贵刘备李雪玲张冬雪
Owner 湖南慧谷农业生态研究院有限公司
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