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Preparation method of mesoporous activated carbon and application of mesoporous activated carbon in relieving filter membrane pollution caused by algae-containing water

A technology of activated carbon and algae water, applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited improvement of low-pressure membrane membrane flux, and the effect of removing organic matter is not very ideal, so as to reduce speculation The effect of reducing microfiltration membrane fouling and relieving membrane fouling

Inactive Publication Date: 2020-06-26
SHANGHAI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Activated carbon pretreatment is a commonly used pretreatment method in low-pressure membrane treatment technology, but the effect of the currently used activated carbon on removing organic matter is not very satisfactory, and its improvement of the membrane flux of low-pressure membranes is very limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 - Preparation of Mesoporous Activated Carbon

[0047] The reagents used in this example are all commercially available reagents, and the template agent is a titanium dioxide-based mesoporous material. The present embodiment is a preferred preparation method of mesoporous activated carbon, which comprises the following steps:

[0048] (1) Add 3g of templating agent to 50ml of an aqueous solution containing 5g of sucrose and 0.8ml of concentrated sulfuric acid (98wt%), place the above solution in a flask, and stir it evenly with magnetic stirring for 20min;

[0049] (2) The flask was heated in an oil bath at 110°C and 170°C for 7 hours respectively, and dried in an oven to obtain a dark brown solid, which was ground into powder with a mortar;

[0050] (3) The powder was evenly dispersed into 50 ml of an aqueous solution containing 5 g of sucrose and 0.6 ml of concentrated sulfuric acid (98 wt %) using magnetic stirring for 10 min, and the above solution was pla...

Embodiment 2

[0055] Embodiment 2-Adopt mesoporous activated carbon to alleviate the filter membrane fouling caused by algae-containing water (organic matter removal rate)

[0056] This embodiment is a better treatment method for using the mesoporous activated carbon prepared in Example 1 to alleviate the microfiltration membrane pollution in the treatment of algae-containing water, which includes:

[0057] The first step: dosing of mesoporous activated carbon. Add a certain dose of activated carbon to the original aqueous solution of algae organic matter with a certain concentration, stir rapidly for 30 minutes, stir slowly for 30 minutes, and let it stand for half an hour.

[0058] Second step: filter the supernatant using a 0.1um mixed cellulose filter (80%-100% nitrocellulose and 0%-20% cellulose acetate), wherein the filter is 400ml from millipore Advanced ultrafiltration membrane, operating pressure 0.1MPa, experimental gas is high-purity nitrogen, filtered water is linked to balance...

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Abstract

The invention relates to mesoporous activated carbon with the pore diameter of 2-4.5 nm, the specific surface area of 800-1000 m<2> / g and the mesoporous volume of 0.8-1.5 cm <3> / g. A preparation method of the mesoporous activated carbon comprises the following steps: adding a template agent into an aqueous solution containing sucrose and concentrated sulfuric acid, and uniformly performing stirring; respectively performing heating for 5 to 10h at temperatures of 100 to 120 DEG C and 160 to 180 DEG C to obtain solid, and grinding the solid into powder; uniformly dispersing the powder into an aqueous solution containing sucrose and concentrated sulfuric acid; respectively performing heating for 5 to 10h at the temperature of 100 to 120 DEG C and the temperature of 160 to 180 DEG C; performing carbonizing for 5-7 hours at a temperature of 700-900 DEG C under the protection of nitrogen, and grinding the obtained solid into powder; and removing the template agent by adopting a hydrofluoricacid solution, and performing washing by adopting ultrapure water to obtain mesoporous activated carbon. The invention further relates to application of the mesoporous activated carbon in relieving filter membrane pollution caused by algae-containing water. After algae-containing water is pretreated by the mesoporous activated carbon, filter membrane pollution caused by organic matters released bythe algal bloom algae can be remarkably relieved, and the removal of the algae organic matters and the membrane flux of the filter membrane can be effectively improved; and the mesoporous activated carbon has very important practical significance in membrane treatment application of the algal bloom algae.

Description

technical field [0001] The invention relates to the technical field of drinking water, in particular to a mesoporous activated carbon and its preparation method and application, more specifically, to a method of using hollow activated carbon to alleviate the pollution of algae-containing water to filter membranes (microfiltration membranes, ultrafiltration membranes, etc.) Methods. Background technique [0002] At present, the eutrophication of lakes and rivers and the frequent outbreak of algae blooms have seriously affected the quality of water supply and brought great harm to people's health and social development. At the same time, algae and their metabolites pose serious challenges to drinking water treatment and water quality safety. The removal of algae by low-pressure membrane technology represented by microfiltration and ultrafiltration is considered to be a more effective removal method than traditional processes. However, membrane fouling by algae and their meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/312B01J20/20B01J20/28B01J20/30C02F1/44C02F1/28C02F101/30
CPCB01J20/20B01J20/28064B01J20/28076B01J20/28083C02F1/281C02F1/444C02F2101/30C01B32/312
Inventor 黄伟伟董秉直褚华强周文宗
Owner SHANGHAI ACAD OF AGRI SCI
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