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Preparation method of poly-silicon iron manganese graphene flocculant

A graphene and ferrosilicon technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc., can solve the problems of high treatment difficulty, poor effect, easy hydrolysis of flocculants, etc. Low requirements for preparation conditions, simple preparation process and wide range of raw material sources

Active Publication Date: 2020-02-21
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the variety of harmful substances in domestic waste leachate, the treatment is very difficult, and it is difficult to meet the discharge standard for leachate treatment with traditional polysilicon-based flocculants.
Specifically, the current application of polysilicon-based flocculants to treat domestic waste leachate mainly has problems such as the poor effect of the flocculant on capturing multiple pollutants at the same time, the low recovery efficiency of the flocculant due to the easy hydrolysis of the flocculant, and the narrow pH range of the flocculant.

Method used

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  • Preparation method of poly-silicon iron manganese graphene flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Influence of the mass ratio of graphite powder and polysilicic acid on the effect of preparing flocculant to treat landfill leachate

[0023] Preparation of polysilicon ferromanganese graphene flocculant: as figure 1 As shown, weigh silica fume and concentrated sulfuric acid according to the solid-to-liquid ratio of 1:1 (mg:mL), mix, stir evenly, and age for 3 hours to obtain polysilicic acid, wherein the mass fraction of concentrated sulfuric acid is 70%; according to graphite Powder and polysilicic acid mass ratio 2.5:100, 3.5:100, 4.5:100, 5:100, 15:100, 25:100, 26:100, 28:100, 30:100 Weigh graphite powder and polysilicon respectively acid, mixed, stirred evenly, and aged for 3 hours to obtain graphite polysilicate; weigh sodium peroxodisulfate and potassium permanganate according to the mass ratio of sodium peroxodisulfate and potassium permanganate 10:100, mix, stir evenly, Obtain a mixed oxidant; weigh the mixed oxidant and graphite polysilicate according to the ...

Embodiment 2

[0040] Effect of the mass ratio of sodium persulfate and potassium permanganate on the effect of preparing flocculant to treat landfill leachate

[0041] Preparation of polysilicon ferromanganese graphene flocculant: Weigh silica fume and concentrated sulfuric acid according to the solid-to-liquid ratio of 1:1.5 (mg:mL), mix, stir evenly, and age for 4.5 hours to obtain polysilicic acid, of which concentrated sulfuric acid The mass fraction is 80%; take graphite powder and polysilicic acid according to the mass ratio of graphite powder and polysilicic acid 25:100, mix, stir evenly, and age for 4.5 hours to obtain graphite polysilicic acid; according to sodium peroxodisulfate and high Potassium manganate mass ratio 5:100, 7:100, 9:100, 10:100, 15:100, 20:100, 21:100, 23:100, 25:100 Weigh sodium persulfate and permanganese respectively Potassium acid potassium, mix, stir evenly, get mixed oxidant; Take mixed oxidant and graphite polysilicic acid according to the mass ratio of mi...

Embodiment 3

[0048] Effect of mass ratio of humic acid, iron powder and graphene oxide polysilicate manganese on the effect of preparing flocculant to treat landfill leachate

[0049] Preparation of polysilicon ferromanganese graphene flocculant: Weigh silica fume and concentrated sulfuric acid according to the solid-to-liquid ratio of 1:2 (mg:mL), mix, stir evenly, and age for 6 hours to obtain polysilicic acid, of which concentrated sulfuric acid The mass fraction is 90%; take graphite powder and polysilicic acid according to the mass ratio of graphite powder and polysilicic acid 25:100, mix, stir evenly, and age for 6 hours to obtain graphite polysilicic acid; according to sodium peroxodisulfate and high Potassium manganate mass ratio 20:100 Weigh sodium peroxodisulfate and potassium permanganate, mix and stir evenly to obtain mixed oxidant; weigh mixed oxidant and graphite polysilicate according to the mass ratio of mixed oxidant and graphite polysilicate 30:100 Acid, mixed, stirred ev...

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Abstract

The invention discloses a preparation method of a poly-silicon iron manganese graphene flocculant. The preparation method comprises the following steps: (1) uniformly mixing silica fume with concentrated sulfuric acid, and aging to obtain polysilicic acid; (2) adding graphite powder into polysilicic acid, uniformly mixing, and aging to obtain graphite polysilicic acid; (3) uniformly mixing sodiumpersulfate and potassium permanganate to obtain a mixed oxidant, adding the mixed oxidant into graphite polysilicic acid, uniformly mixing, carrying out ultrasonic treatment, and aging to obtain graphene oxide polysilicic acid manganese; and (4) uniformly mixing humic acid, iron powder and graphene oxide polysilicic acid manganese, aging, adjusting the pH value to be lower than 7, continuing aging, drying, and grinding to obtain the poly-silicon iron manganese graphene flocculant. The poly-silicon iron manganese graphene flocculant can capture various pollutants at the same time, the flocculant recovery efficiency is high, and the applicable pH range of the flocculant is wide; the preparation process is simple, the preparation condition requirement is low, the preparation process is easy to realize, and the required raw material source is wide.

Description

technical field [0001] The invention relates to a preparation method of an inorganic flocculant, in particular to a preparation method of a polysilicon-iron-manganese graphene flocculant used for treating landfill leachate. Background technique [0002] Due to the action of natural precipitation and microbial anaerobic decomposition, during the landfill process of domestic waste, it is easy to form a kind of domestic waste leachate with complex components of pollutants, high concentration of pollutants and toxicity in the covering soil layer. Domestic waste leachate has the characteristics of complex water quality components, many types of heavy metals, high ammonia nitrogen content, and large fluctuations in water volume and water quality. Domestic waste leachate contains a large amount of toxic and harmful substances. If it is not disposed of properly, it will cause serious damage to the ecological environment and seriously affect the health of local residents. [0003] T...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/28C02F103/06C02F101/20C02F101/16
CPCC02F1/5236C02F1/283C02F2209/06C02F2103/06C02F2209/08C02F2209/14C02F2101/20C02F2101/16
Inventor 黄涛宋东平刘万辉张树文周璐璐徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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