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Method for preparing adsorbent from high-alumina fly ash, and application of adsorbent

A high-alumina fly ash and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of adsorption effect, adsorption performance, high cost, easy to control the preparation process, The effect of low cost and simple process operation method

Inactive Publication Date: 2020-04-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The adsorption method has the advantages of high efficiency, simple operation and reusable adsorbent, but the adsorption effect is affected by the adsorption performance of the adsorbent, and the cost is high. The preparation of low-cost and high-performance adsorbent becomes the key to the use of adsorption method to treat cadmium-containing wastewater. where the

Method used

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  • Method for preparing adsorbent from high-alumina fly ash, and application of adsorbent
  • Method for preparing adsorbent from high-alumina fly ash, and application of adsorbent
  • Method for preparing adsorbent from high-alumina fly ash, and application of adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: This utilizes the method for preparing adsorbent with high aluminum fly ash, concrete steps are as follows:

[0027] Put 50g of fly ash (Mongolian high-alumina fly ash) and 50g of anhydrous sodium carbonate into a crucible and mix evenly. After mixing, put the crucible into a box-type resistance furnace and raise the temperature to 900°C at a constant speed and react at a constant temperature for 120 minutes to obtain a sintered product. Sinter Cool the material to room temperature and grind it into powder; take 10g of powdery sintered material and put it into a conical flask, add a hydrochloric acid solution with a mass concentration of 18.5%, stir for 1 hour in a water bath at 90°C, filter with suction, and wash with distilled water until the filter residue is white , collect and combine the filtrate and washing liquid to prepare aluminum-containing solution, add distilled water and surfactant solution (polyether P123, the concentration of surfactant solu...

Embodiment 2

[0031] Embodiment 2: this utilizes the method for preparing adsorbent with high aluminum fly ash, concrete steps are as follows:

[0032] Put 50g of fly ash (Mongolian high-alumina fly ash) and 30g of anhydrous sodium carbonate into the crucible and mix evenly. After mixing, put the crucible into a box-type resistance furnace and raise the temperature to 1000°C at a constant speed and react at a constant temperature for 80 minutes to obtain a sintered product. Sinter The mixture was cooled to room temperature and ground into powder; 10 g of powdery sintered material was put into a conical flask, and a hydrochloric acid solution with a mass concentration of 15% was added, sealed with a plastic wrap, stirred for 1.5 h in a water bath at 70°C, and suction filtered. Wash with distilled water until the filter residue is white, collect and combine the filtrate and washing liquid to obtain an aluminum-containing solution, add distilled water and a surfactant solution (polyether P123, ...

Embodiment 3

[0034] Embodiment 3: this utilizes the method for preparing adsorbent with high aluminum fly ash, concrete steps are as follows:

[0035]Put 50g of fly ash (Mongolian high-alumina fly ash) and 60g of anhydrous sodium carbonate into the crucible and mix evenly. After mixing, put the crucible into a box-type resistance furnace and raise the temperature to 1200°C at a constant speed and react at a constant temperature for 60 minutes to obtain a sintered product. Sinter Cool the material to room temperature and grind it into powder; take 10g of powdered sintered material and put it into a conical flask, add a hydrochloric acid solution with a mass concentration of 25%, seal it with a plastic wrap, stir it in a water bath at 60°C for 2 hours, suction filter, distilled water Wash until the filter residue is white, collect and combine the filtrate and washing liquid to prepare an aluminum-containing solution, add distilled water and a surfactant solution (polyether P123, the concentra...

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Abstract

The invention discloses a method for preparing an adsorbent from high-alumina fly ash. The method comprises the following steps: carrying out activating acid leaching on industrial solid waste high-alumina fly ash used as a raw material to obtain an aluminum solution, mixing and reacting the aluminum solution with a surfactant, regulating the pH value of the obtained solution to 6.5-7.5, carryingout flocculation standing, filtering to obtain a solid, drying the solid, and calcining the dried solid to obtain the adsorbent. The adsorbent is applied to adsorption of heavy metal ions cadmium Cd (II), and has the characteristics of high adsorption speed, high adsorption rate, and realization of deep removal of cadmium in low-cadmium-concentration water; and a method is provided for high value-added utilization of the fly ash, and a new way is also provided for treatment of water containing heavy metal ions, namely cadmium ions.

Description

technical field [0001] The invention relates to a method for preparing a cadmium adsorbent by using high-alumina fly ash and its application, and belongs to the fields of secondary utilization of solid waste resources and treatment of water bodies containing heavy metals. Background technique [0002] Fly ash is one of the by-products of coal-fired power generation. The stockpile of fly ash in the country exceeds 3 billion tons, and it is one of the main industrial wastes. Fly ash is also the main pollution source of PM2.5 smog pollution in my country. A large amount of fly ash not only occupies land but also the fine particles of fly ash are easy to raise dust, leading to air pollution. The chemical composition of fly ash is mainly SiO 2 (40-60%), Al 2 o 3 (17-35%), FeO (2-15%), CaO (1-10%), and the rest are a small amount of compounds such as K, P, S, Mg and traces of As, Cu, Zn, etc.; The alumina content in fly ash in Shanxi and other areas often exceeds 30%. After ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/043C02F1/281C02F1/283C02F2101/20
Inventor 何素芳泮子恒刘能生刘成伟何鑫涛
Owner KUNMING UNIV OF SCI & TECH
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