A kind of preparation method of inorganic flocculant based on tuff and aluminum ash

An inorganic flocculant and tuff technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc., can solve the problems of low pollutant removal rate and poor separation effect of flocculant water body, etc., to achieve The effect of low cost of use

Active Publication Date: 2022-03-08
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current existing flocculants have the problems of low pollutant removal rate and poor water separation effect of flocculants when treating landfill leachate.

Method used

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  • A kind of preparation method of inorganic flocculant based on tuff and aluminum ash
  • A kind of preparation method of inorganic flocculant based on tuff and aluminum ash
  • A kind of preparation method of inorganic flocculant based on tuff and aluminum ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Effects of the mass ratio of sodium phosphate and tuff on the removal of COD, total phosphorus, ammonia nitrogen, mercury and arsenic in landfill leachate by the prepared inorganic flocculant

[0023] Preparation of inorganic flocculants based on tuff and aluminum ash: as figure 1 As shown, according to the mass ratio of sodium phosphate and tuff 2.5:100, 3.5:100, 4.5:100, 5:100, 10:100, 15:100, 15.5:100, 16.5:100, 17.5:100 respectively weigh sodium phosphate Mix with tuff, grind at 2000rpm at a high speed for 30min, and pass through a 2000 mesh sieve to obtain phosphorus-activated tuff superfine powder; mix concentrated hydrochloric acid and water to prepare 5mol / L hydrochloric acid solution, according to the solid-liquid ratio of 1:1 (mg:mL ) Add phosphorus-activated tuff superfine powder into hydrochloric acid solution, and apply ultrasonic waves for 6 hours under the condition of 60°C and 400W output power to obtain flocculation slurry; weigh aluminum ash according ...

Embodiment 2

[0037] Effect of concentration of hydrochloric acid solution on the removal of COD, total phosphorus, ammonia nitrogen, mercury and arsenic in landfill leachate by the prepared inorganic flocculant

[0038] Preparation of inorganic flocculant based on tuff aluminum ash: take sodium phosphate and tuff according to the mass ratio of sodium phosphate and tuff 15:100, mix, grind for 45min under the condition of 6000rpm high speed, and pass through a 5000 mesh sieve to obtain phosphorus-activated tuff super Fine powder; mixed with concentrated hydrochloric acid and water to prepare 2.5mol / L, 3.5 mol / L, 4.5 mol / L, 5 mol / L, 10 mol / L, 15mol / L, 15.5 mol / L, 16.5 mol / L, 17.5 mol / L hydrochloric acid solution; according to the solid-to-liquid ratio of 1:1.5 (mg:mL), add phosphorous-activated tuff superfine powder into the hydrochloric acid solution, and apply ultrasonic waves for 9 hours at 80°C and 800W output power to obtain flocculation slurry; Weigh aluminum ash and flocculation slurry...

Embodiment 3

[0044] Effects of the mass ratio of aluminum ash and flocculation slurry on the removal of COD, total phosphorus, ammonia nitrogen, mercury and arsenic in landfill leachate by the prepared inorganic flocculant

[0045] The preparation of the inorganic flocculant based on tuff and aluminum ash: take sodium phosphate and tuff by weighing sodium phosphate and tuff mass ratio 15:100, mix, grind 60min under the condition of 10000rpm high speed, pass 8000 mesh sieves, obtain phosphorus-activated tuff super Fine powder; mix concentrated hydrochloric acid and water to prepare 15mol / L hydrochloric acid solution, add phosphorus-activated tuff ultra-fine powder to the hydrochloric acid solution according to the solid-to-liquid ratio of 1:2 (mg:mL), under the conditions of 100°C temperature and 1200W output power Ultrasound for 12 hours to obtain flocculation slurry; according to the mass ratio of aluminum ash and flocculation slurry 1:100, 1.5:100, 1.75:100, 2:100, 4:100, 6:100, 6.5:100, ...

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Abstract

The invention discloses a preparation method of an inorganic flocculant based on tuff and aluminum ash, which comprises the following steps: (1) mixing, grinding and sieving sodium phosphate and tuff to obtain phosphorus-activated tuff; (2) activating the phosphorus tuff adding into hydrochloric acid solution, ultrasonic treatment to obtain flocculation slurry; (3) mixing aluminum ash and flocculation slurry, stirring, aging, drying and grinding to obtain an inorganic flocculant based on tuff and aluminum ash. Based on the chemical composition characteristics of tuff and aluminum ash itself, the invention couples and strengthens the silicon release of tuff through phosphate catalysis and ultrasonic strengthening, and fuses the silicon-aluminum-phosphorus colloid with the aluminosilicate gel through hydroxyl bridge connection and polycondensation Together, they form a flocculant, which can efficiently remove more than 96% of heavy metals, more than 93% of ammonia nitrogen, more than 93% of COD, and more than 95% of total phosphorus in domestic waste leachate, and the recovery efficiency is as high as more than 96%. Value utilization provides a new direction.

Description

technical field [0001] The invention relates to a preparation method of an inorganic flocculant, in particular to a preparation method of an inorganic flocculant based on tuff and aluminum ash. Background technique [0002] Tuff belongs to a kind of pyroclastic rock, which is currently mainly used to produce aggregate, stone sand, and stone powder. Its commercial use value is low and its application range is limited. Tuff contains more than 50% silica and is dominated by glassy silica with low activity. In order to utilize the silicon in tuff, it is generally necessary to add a large amount of alkali and a higher sintering temperature to stimulate the activity of silica in tuff to promote the formation of cementitious materials. However, this method requires high temperature resistance of equipment. Moreover, the resulting gelled material is prone to caking and anti-alkali problems. Silica is almost insoluble in an acidic environment and the activity of silica is difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F101/16C02F101/20C02F103/06
CPCC02F1/5245C02F1/5236C02F2101/16C02F2101/20C02F2103/06C02F2209/08
Inventor 黄涛宋东平刘万辉金俊勋刘龙飞张树文徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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