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Preparation method of wastewater remediation agent based on incineration fly ash

A technology for incinerating fly ash and repairing agents, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. It can solve the problems of high disposal cost, low removal rate, secondary pollution, etc., and achieves a simple preparation method, The effect of cheap raw materials and efficient removal

Active Publication Date: 2019-04-09
浙江中陶环保科技集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Industrial wastewater contains a variety of inorganic heavy metal pollutants (such as hexavalent chromium, pentavalent arsenic, and divalent cadmium) and organic pollutants (such as benzo(α)pyrene). Simultaneous removal, even if persulfate that can degrade organic pollutants through alkali-activated oxidation is added to the adsorbent, the effect of simultaneous removal of the two is not ideal, and the removal rate is often low
In addition, the used adsorption materials basically belong to the category of hazardous solid waste, which is prone to secondary pollution in the process of solid-liquid separation, transportation, storage, and disposal, and the disposal cost is very high. The impact of pollutants will also be leached from the adsorbent, which has become a major limitation that traditional adsorbents are difficult to popularize and apply.

Method used

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  • Preparation method of wastewater remediation agent based on incineration fly ash
  • Preparation method of wastewater remediation agent based on incineration fly ash
  • Preparation method of wastewater remediation agent based on incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Effects of incineration fly ash, tuff powder and sodium hydroxide mass ratio on the removal of hexavalent chromium, pentavalent arsenic, divalent cadmium and benzo(α)pyrene in water:

[0020] Such as figure 1 Shown, is the preparation process of waste water remediation agent, specifically: according to incineration fly ash, tuff powder, sodium hydroxide mass ratio is 10:0.5:0.1, 10:1:0.25, 10:1.5:0.5, 10:1.5: 1. 10:2:1, 10:4:1, 10:4:1.5, 10:4:2, 10:6:1, 10:6:1.5, 10:6:2, 10:8:1, 10:8:1.5, 10:8:2, 10:10:2, 10:10:2.5, 10:10:3, 10:11:3, 10:12:3, weigh incineration fly Ash, tuff powder and sodium hydroxide were mixed evenly, and then activated at 300°C for 2 hours to obtain activated fly ash powder; according to the mass ratio of iron tailings and scrap iron slag as 4:1, weigh iron tailings and Scrap iron slag, mix evenly, grind at high speed for 1 hour, cross 100 mesh sieves, obtain iron base powder; Ash powder, iron-based powder, and sodium peroxodisulfate are mixed ev...

Embodiment 2

[0027] Effect of activated fly ash powder activation temperature on the removal of hexavalent chromium, pentavalent arsenic, divalent cadmium and benzo(α)pyrene in water:

[0028] According to the mass ratio of incineration fly ash, tuff powder, and sodium hydroxide as 10:6:2, weigh the corresponding mass of incineration fly ash, tuff powder, and sodium hydroxide, mix them evenly, and then heat them at 100°C, 150°C, and 200°C respectively. ℃, 250°C, 280°C, 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, 900°C, 920°C, 950°C, 1000°C for 5 hours to obtain activated fly ash powder; The mass ratio of iron tailings and waste iron slag is 3:1, take iron tailings and waste iron slag respectively, mix uniformly, grind at high speed for 2.5 hours, cross 200 mesh sieves, obtain iron-based powder; press activated fly ash powder, The mass ratio of iron-based powder and sodium peroxodisulfate is 10:2:2. The activated fly ash powder, iron-based powder and sodium peroxodisulfate are weighed respect...

Embodiment 3

[0034] The effect of the mass ratio of iron tailings and scrap iron slag on the removal of hexavalent chromium, pentavalent arsenic, divalent cadmium and benzo(α)pyrene in water:

[0035] According to the mass ratio of incineration fly ash, tuff powder and sodium hydroxide as 10:6:2, weigh the corresponding mass of incineration fly ash, tuff powder and sodium hydroxide, mix them evenly, and then activate them at 700°C for 8 hours. The activated fly ash powder is obtained; the mass ratio of iron tailings and waste iron slag is 5:1, 4.5:1, 4.2:1, 4:1, 3.5:1, 3:1, 2.5:1, 2:1, 1.5:1, 1:1, 0.8:1, 0.5:1, 0.2:1, respectively weigh iron tailings and scrap iron slag, mix evenly, grind at high speed for 4 hours, and pass through a 300-mesh sieve to obtain iron-based powder; The mass ratio of activated fly ash powder, iron-based powder, and sodium peroxodisulfate is 10:3:3. Weigh the activated fly ash powder, iron-based powder, and sodium peroxodisulfate respectively, mix them evenly, an...

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Abstract

The invention discloses a preparation method of a wastewater remediation agent based on incineration fly ash. The preparation method comprises the following steps: (1) respectively weighing incineration fly ash, tuff powder and sodium hydroxide, uniformly mixing, and heating for activation, so as to obtain activated fly ash powder; (2) respectively weighing iron tailings and scrap iron slag, uniformly mixing, grinding, and sieving, so as to obtain iron-base powder; and (3) respectively weighing the activated fly ash powder, the iron-base powder and sodium persulfate, uniformly mixing, and grinding, so as to obtain the wastewater remediation agent. By virtue of the combination, mutual complementation and mutual cooperation of an incineration fly ash solidification technique and a techniquefor removing pollutants through an oxidation reduction effect, the synchronous and efficient removal of hexavalent chromium, pentavalent arsenic, divalent cadmium and benzo(alpha)pyrene in a water body with a pH value of 3-12 is realized, and the removal rate reaches up to 98%; pollutants are solidified in particles of the remediation agent, so that the leaching of the pollutants is avoided; a novel application direction is provided for the harmless treatment and resource utilization of the incineration fly ash; and the preparation method of the wastewater remediation agent is simple and low in raw material cost.

Description

technical field [0001] The invention relates to a preparation method of an industrial wastewater remediation agent, in particular to a preparation method of a waste water remediation agent based on incineration fly ash. Background technique [0002] Industrial wastewater contains a variety of inorganic heavy metal pollutants (such as hexavalent chromium, pentavalent arsenic, and divalent cadmium) and organic pollutants (such as benzo(α)pyrene). Simultaneous removal, even if persulfate that can degrade organic pollutants through alkali-activated oxidation is added to the adsorbent, the effect of simultaneous removal of the two is not ideal, and the removal rate is often low. In addition, the used adsorption materials basically belong to the category of hazardous solid waste, which is prone to secondary pollution in the process of solid-liquid separation, transportation, storage, and disposal, and the disposal cost is very high. The impact of pollutants will also be leached f...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/28C02F1/52C02F101/20C02F101/22C02F101/32
CPCC02F1/288C02F1/5236C02F1/72C02F2101/103C02F2101/20C02F2101/22C02F2101/327C02F2305/02C02F2305/023
Inventor 黄涛宋东平刘万辉周璐璐陶骏骏
Owner 浙江中陶环保科技集团有限公司
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