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Preparation method of aluminum carried pulverized fuel ash applied to recycling of phosphorus resources in waste water

A technology for fly ash and phosphorus resources, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effects of simple preparation method, realization of regeneration, and low energy consumption

Inactive Publication Date: 2015-11-25
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the research, few researchers have studied wet ash as an adsorbent.

Method used

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  • Preparation method of aluminum carried pulverized fuel ash applied to recycling of phosphorus resources in waste water
  • Preparation method of aluminum carried pulverized fuel ash applied to recycling of phosphorus resources in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of aluminum-loaded fly ash: first, put the fly ash in a container containing 0.05mol·L -1 Soak in the container of aluminum sulfate solution for 1 day and night; then, pour out the aluminum sulfate solution in the container, and wash the fly ash with water, after cleaning, pour off the water, then add water to the container where the fly ash Higher than fly ash; Afterwards, drip sodium hydroxide solution in water under stirring action, the pH value of water is slowly raised to 7.5-8.0, and the time of controlling whole sodium hydroxide solution dripping process is 0.5 hour; Finally, Separate the fly ash from the water and let it dry.

Embodiment 2

[0028] The preparation method of aluminum-loaded fly ash: first, put the fly ash in a container containing 0.6mol·L -1 Then, pour out the aluminum nitrate solution in the container, and wash the fly ash with water. After cleaning, pour off the water, then add water to the container where the fly ash is located, and make the water surface Higher than fly ash; Afterwards, drip potassium hydroxide solution in water under stirring action, make the pH value of water slowly rise to 7.5-8.0, control the time of whole potassium hydroxide solution dripping process to be 1.5 hours; Finally, Separate the fly ash from the water and put it into a muffle furnace for high temperature treatment at 300°C for 16 hours.

Embodiment 3

[0030] The preparation method of aluminum-loaded fly ash: first, the fly ash was mixed in 0.1mol·L -1 Soak in dilute sulfuric acid for 3 days and nights; then, put the fly ash in a container containing 0.3mol·L -1 Then, pour out the aluminum chloride solution in the container, and wash the fly ash with water. After cleaning, pour off the water, add water to the container where the fly ash is located, and Make the water surface higher than the fly ash; after that, add potassium hydroxide solution dropwise to the water under the action of stirring, so that the pH value of the water is slowly raised to 7.5-8.0, and the time for controlling the whole process of adding potassium hydroxide solution is 1 hour; Finally, the fly ash is separated from the water and allowed to dry.

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Abstract

The invention discloses a preparation method of aluminum carried pulverized fuel ash applied to recycling of phosphorus resources in waste water, and relates to the technical field of preparation methods of phosphorus adsorbents. The preparation method comprises the following steps: soaking pulverized fuel ash in a container accommodating a water soluble aluminum salt solution, thereby adsorbing a surface layer containing aluminum ions onto the surface of the pulverized fuel ash; then, pouring the water soluble aluminum salt solution out of the container, washing the pulverized fuel ash with water, and adding water into the container with the pulverized fuel ash, wherein the water surface is higher than the pulverized fuel ash; subsequently, dropwise adding alkali liquor into the water while stirring to ensure that the pH value of the water slowly increases to 7.5-8.0, wherein the whole process of dropwise adding the alkali liquor lasts for 0.5-1.5 hours; and finally, separating the pulverized fuel ash from the water, and airing. The aluminum carried pulverized fuel ash can be used for effectively adsorbing phosphate radicals in waste water, has large adsorption capacity when the content of phosphorus in a water solution is high, and is easy to recover.

Description

technical field [0001] The invention relates to the technical field of the preparation method of an adsorbent used in the recovery of phosphorus resources in phosphorus-containing wastewater, in particular to a method for preparing aluminum-loaded fly ash used in the recovery of phosphorus resources in wastewater. Background technique [0002] Phosphorus is a non-renewable resource. How to realize the sustainable utilization of phosphorus resources is one of the key problems facing the sustainable development of agriculture in various countries. In traditional agriculture, phosphorus is recycled along the lines of "farmland soil-crops-food-manure-manure returning to the field"; the development of the modern fertilizer industry provides agriculture with fertilizers that are easy to apply and have high nutrient concentrations, replacing Without traditional agricultural fertilizer sources, manure is often discharged with municipal wastewater, and the phosphorus resources in man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 徐晓峰王发园孙丽蓉
Owner HENAN UNIV OF SCI & TECH