Method for preparing adsorbent by using bottom mud of Dian Lake and application thereof

A technology of adsorbent and bottom mud, which is applied in the field of preparation of new heavy metal adsorbents, and achieves the effects of simple operating conditions, high yield of finished products, and increased adsorption capacity

Inactive Publication Date: 2015-03-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Lake sediment contains a large amount of carbon-containing organic matter, which provides certain prerequisites for the preparation of adsorbents by carbonization. At present, there are few reports on the preparation of adsorbents from lake sediments at home and abroad.

Method used

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  • Method for preparing adsorbent by using bottom mud of Dian Lake and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of method of preparing adsorbent with the bottom mud of Dianchi Lake described in this embodiment (such as figure 1 shown), specifically include the following steps:

[0023] (1) Dehydrate the bottom mud of Dianchi Lake until the water content is 33%, enter the granulation device to make bottom mud granules with a diameter of 2 mm, soak in distilled water for 3 hours and wash, wash repeatedly 3 times, and then put it in an oven for drying ;

[0024] (2) According to the ratio of 5g / 100ml, add the bottom mud of Dianchi Lake into the glutaraldehyde solution with a mass fraction of 1% and soak for 10h, stir with a magnetic stirrer for 15min every 1.5h, and filter;

[0025] (3) Add 10ml of polydimethyldiallylammonium chloride solution to the sludge obtained in step (2) per 1g of sludge, soak After 6 hours, place it in a water bath at 60°C and heat it to reflux for 100 minutes. After pouring off the supernatant, acidify it with 0.1mol / L hydrochloric acid for 1.5 hou...

Embodiment 2

[0031] A method for preparing an adsorbent from the bottom mud of Dianchi Lake described in this embodiment specifically includes the following steps:

[0032] (1) Dehydrate the bottom mud of Dianchi Lake until the water content is 35%, enter the granulation device to make bottom mud particles with a diameter of 2.5m, soak in distilled water for 2.5h and wash, wash repeatedly 4 times, and then put it into the oven drying;

[0033] (2) According to the ratio of 10g / 100ml, add the bottom mud of Dianchi Lake to the glutaraldehyde solution with a mass fraction of 2%, soak for 11 hours, stir with a magnetic stirrer for 12 minutes every 1.8 hours, and filter;

[0034] (3) According to the ratio of adding 15ml polydimethyldiallylammonium chloride solution to the sludge obtained in step (2) per 1g, add polydimethyldiallylammonium chloride solution to the sludge, soak After 7 hours, place it in a water bath at 50°C and heat it under reflux for 110 minutes. After pouring off the supernat...

Embodiment 3

[0040] A method for preparing an adsorbent from the bottom mud of Dianchi Lake described in this embodiment specifically includes the following steps:

[0041] (1) Dehydrate the bottom mud of Dianchi Lake until the water content is 37%, enter the granulation device to make bottom mud granules with a diameter of 3 mm, soak in distilled water for 2 hours and wash, wash repeatedly 5 times, and then put it in an oven for drying ;

[0042] (2) According to the ratio of 15g / 100ml, add the bottom mud of Dianchi Lake to the glutaraldehyde solution with a mass fraction of 3%, soak for 12 hours, stir with a magnetic stirrer for 10 minutes every 2 hours, and filter;

[0043] (3) Add 20ml of polydimethyldiallyl ammonium chloride solution to the sludge at the ratio of 20ml of polydimethyldiallylammonium chloride solution per 1g of the sludge obtained in step (2), soak After 8 hours, place it in a water bath at 70°C and heat it to reflux for 120 minutes. After pouring off the supernatant, ...

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Abstract

The invention discloses a method for preparing adsorbent by using bottom mud of Dian Lake and application thereof, and belongs to the technical field of preparation of heavy metal adsorbents. The method comprises the following steps: soaking the bottom mud by distilled water, repeatedly washing and drying the bottom mud, adding a glutaraldehyde solution into the bottom mud to serve as an activator, adding the bottom mud into a polydimethyl diallylammonium chloride solution, putting in a water bath to carry out heating reflux, pouring the supernate and carrying out acidizing by hydrochloric acid, filtering and washing to neutral and drying to obtain initial samples, putting the samples in an electric furnace and carrying out high-temperature carbonization by taking vapor as protection gas, obtaining carbonized samples after cooling, repeatedly washing the samples to remove the impurities in the carbonized products until washing to neutral (pH>6.5), carrying out drying, grinding after cooling, and screening to obtain the samples according with adsorption. The method is simple in operation conditions, extremely high in adsorbent productivity; through combining the physical activation method and the chemical activation method, the activation effect is relatively good, the performance of the adsorbent is improved and the adsorption value of manganese is greater than 19mg / g.

Description

technical field [0001] The invention relates to a method and application for preparing an adsorbent from bottom mud of Dianchi Lake, and belongs to the technical field of preparation of novel heavy metal adsorbents. Background technique [0002] The modern sediments of Dianchi Lake can be divided into three layers: from top to bottom, they are the polluted layer, the transition layer, and the unpolluted lake sediment layer. The bottom mud of Dianchi Lake in this paper refers to the polluted layer. The high content of heavy metals in the bottom mud presents potential ecological risks; the characteristics of nutrient salt pollution in the bottom mud are obvious; the content of organic matter is high, generally in the range of 40-90g / kg, and the content of organic matter in grassy bottom mud is greater than that in the open sea, and the organic matter is easy to rot and smell pollutes the environment. Emitting greenhouse gases to the atmosphere; the sediment in the sediment con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/64
CPCB01J20/20C02F1/281C02F1/56C02F2101/206
Inventor 宁平杨月红程杨石磊张怀予于珊珊
Owner KUNMING UNIV OF SCI & TECH
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