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Method for preparing nano aluminum-based adsorbing material by utilizing aluminum slag

An adsorption material, nano-aluminum technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex preparation process, residual aluminum ions, poor adsorption performance, etc. Simple preparation process and the effect of improving mass transfer efficiency

Active Publication Date: 2021-03-19
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of polyaluminum chloride by using aluminum slag usually needs to go through steps such as acid dissolution, alkali addition polymerization, sedimentation, concentrated acid drying, and separation. The preparation process is relatively complicated, and a variety of chemical reagents are required in the preparation process
At the same time, compared with commercial polyaluminum chloride, the polyaluminum chloride material prepared by using aluminum slag has poor coagulation and adsorption performance, and aluminum ions are easy to remain in the waste liquid, resulting in secondary pollution.

Method used

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  • Method for preparing nano aluminum-based adsorbing material by utilizing aluminum slag
  • Method for preparing nano aluminum-based adsorbing material by utilizing aluminum slag
  • Method for preparing nano aluminum-based adsorbing material by utilizing aluminum slag

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Influence of nozzle flow rate on the prepared nano-aluminum-based adsorption materials

[0017] Preparation of nano-aluminum-based adsorbent materials: such as figure 1 As shown, hydrochloric acid is mixed with water to prepare an aqueous hydrochloric acid solution with a concentration of 1mol / L, and the aluminum slag is ground for 1 hour to obtain an aluminum slag powder. Mix the two, stir at 60rpm for 2 hours to obtain an aluminum acid slurry, then centrifuge it at 2000rpm for 5 minutes, take the supernatant after standing still, and obtain the acid solution containing aluminum chloride; turn on the high-voltage power supply for low-temperature plasma Body irradiation, during the irradiation process, the chloroaluminum acid solution is sprayed into the reaction tank through the low-temperature plasma high-pressure needle electrode and the fine water mist nozzle, and oxygen is exposed into the reaction tank through the aeration plate, and the aeration plate is connecte...

Embodiment 2

[0028] Effect of oxygen flow rate on the prepared nano-aluminum-based adsorbent materials

[0029]Preparation of nano-aluminum-based adsorption material: Mix hydrochloric acid and water to prepare a hydrochloric acid aqueous solution with a concentration of 5.5mol / L, grind the aluminum slag for 3.5 hours to obtain aluminum slag powder, and follow the liquid-solid ratio of hydrochloric acid aqueous solution to aluminum slag powder 2.5:1 (mL: mg), the two were mixed, stirred for 7 hours at a rotating speed of 240rpm to obtain an aluminum acid slurry, which was then centrifuged for 15 minutes at a rotating speed of 6000rpm, and the supernatant was taken after standing to obtain a chloroaluminic acid solution; Turn on the high-voltage power supply for low-temperature plasma irradiation. During the irradiation process, the chloro-aluminum acid solution is sprayed into the reaction tank through the low-temperature plasma high-voltage needle electrode and the fine water mist nozzle, a...

Embodiment 3

[0036] Effect of low temperature plasma action voltage on the prepared nano-aluminum-based adsorbent materials

[0037] Preparation of nano-aluminum-based adsorbent material: mix hydrochloric acid with water, prepare a hydrochloric acid aqueous solution with a concentration of 10mol / L, grind the aluminum slag for 6 hours to obtain aluminum slag powder, according to the liquid-solid ratio of hydrochloric acid aqueous solution and aluminum slag powder 4:1 ( mL:mg) mix the two, stir at 420rpm for 12 hours to obtain an aluminum acid slurry, then centrifuge it at 10,000rpm for 25 minutes, take the supernatant after standing, and obtain the chloroaluminum acid solution, turn on the high voltage power supply Low-temperature plasma irradiation is carried out. During the irradiation process, the chloro-aluminum acid solution is sprayed into the reaction tank through the low-temperature plasma high-pressure needle electrode and the fine water mist nozzle, and oxygen is exposed into the r...

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Abstract

The invention discloses a method for preparing a nano aluminum-based adsorption material by utilizing aluminum slag, which comprises the steps of (1) uniformly mixing a hydrochloric acid water solution with aluminum slag powder to obtain an aluminum acid slurry, centrifuging to obtain a supernatant, and obtaining a chlorine-containing aluminum acid solution; and (2) carrying out low-temperature plasma irradiation treatment on the chlorine-containing aluminum acid solution, spraying the chlorine-containing aluminum acid solution into a reaction tank through a low-temperature plasma high-pressure needle electrode and a water mist nozzle in the irradiation process, aerating oxygen into the reaction tank at the same time, recovering the liquid in the reaction tank after the irradiation is finished to obtain polymorphic aluminum chloride slurry, and drying to obtain the nano-based adsorbing material. The preparation process is simple, and raw materials required in the preparation process are few and are only aluminum slag, hydrochloric acid and oxygen; the low-temperature plasma and the water mist spraying device are combined, so that the mass transfer efficiency of the low-temperatureplasma can be effectively improved; and the prepared nano aluminum-based adsorbing material can realize synchronous and efficient adsorption of ammonia nitrogen, COD, mercury, lead, cadmium and arsenic.

Description

technical field [0001] The invention relates to the preparation of adsorption materials, in particular to a method for preparing nanometer aluminum-based adsorption materials by using aluminum slag. Background technique [0002] The aluminum electrolytic smelting process tends to produce a large amount of aluminum slag, which, as a solid waste, contains alumina, aluminum nitride, elemental aluminum, silicate and other metal salts. Because it contains certain toxic and harmful heavy metal salts, if the aluminum slag is randomly piled up or disposed of, it is easy to cause damage to the surrounding ecological environment and pose a threat to the health of residents. The demand for pollution prevention and resource utilization of aluminum slag has become an important prerequisite for the healthy and sustainable development of the aluminum electrolytic smelting industry. Exploiting the effective resource utilization of aluminum slag can not only solve the problem of a large amo...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F101/10C02F101/16C02F101/20C02F101/30
CPCB01J20/0288C02F1/281C02F2101/16C02F2101/30C02F2101/20C02F2101/103Y02P10/20
Inventor 黄涛宋东平曹振兴金俊勋杜晶
Owner CHANGSHU INSTITUTE OF TECHNOLOGY