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A kind of adsorbent based on waste coal gangue and its preparation method and application

A coal gangue and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of low removal rate of heavy metal ions, achieve good industrial prospects, significant effect, and easy preparation Effect

Active Publication Date: 2020-07-14
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a novel adsorbent prepared by making full use of discarded coal gangue. The novel adsorbent aims at the problem of low removal rate of heavy metal ions in traditional sewage treatment. The adsorption, exchange and complexation properties of Zn in industrial wastewater 2+ At the same time, other components contained in the wastewater (such as organic matter and inorganic salts) can interact with coal gangue, which improves the removal rate of pollutants in sewage and has a good industrial application prospect

Method used

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  • A kind of adsorbent based on waste coal gangue and its preparation method and application
  • A kind of adsorbent based on waste coal gangue and its preparation method and application
  • A kind of adsorbent based on waste coal gangue and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0026] The chemical composition of coal gangue taken from a coal mining area in Tieling is shown in Table 1. Rinse it with distilled water for 2-3 times to remove impurities, then put it into an oven and bake it at 55°C for 24 hours to make it dry. And pulverize in a grinder, pass through a 200-mesh sieve, and take the under-sieve to obtain coal gangue powder for future use.

[0027] According to the mass ratio of 5:1, take coal gangue powder and potassium carbonate solid, add appropriate amount of water to mix, bake at 55°C for 24 hours, and make it dry; put the dried mixture in a muffle furnace, and calcinate at 600°C 40 minutes, then heated to 850° C., and calcined for 50 minutes to obtain the target product based on an adsorbent based on waste coal gangue.

[0028] Table 1

[0029] Element SiO 2

Embodiment 2

[0031] (1) Sewage source

[0032] The sewage comes from industrial production wastewater containing heavy metal ions in the Huludao Zinc Plant, pH is 6.57, Zn 2+ The concentration is 136.11mg / L.

[0033] (2) The amount of adsorbent has a great influence on the removal of metal ion Zn 2+ Impact

[0034] Method: Take 100ml of sewage, add respectively 0.05g, 0.10g, 0.15g, 0.20g, 0.25g, 0.30g of the adsorbent based on waste coal gangue prepared in Example 1, react for 2 hours, then measure the Zn in the solution 2+ content. The result is as figure 1 .

[0035] Depend on figure 1 It can be seen from the experimental results in that, with the increase of the amount of adsorbent added, its effect on Zn 2+ The adsorption rate increases accordingly. When the amount of sorbent based on waste coal gangue is 0.20g, it has the effect on Zn 2+ Better adsorption effect.

[0036] (3) The pH of wastewater affects the removal of metal ions Zn 2+ Impact

[0037] Method: Take 100ml of...

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Abstract

The invention relates to an adsorbent based on waste coal gangue as well as a preparation method and application thereof, and belongs to the field of resource utilization of solid waste. The preparation method comprises the following steps: drying and pulverizing coal gangue discharged in a coal mining process and a coal washing process, then adding water, mixing the pulverized coal gangue with potassium carbonate in mass ratio of 5:1, performing drying, then performing calcining at 600 DEG C for 40 min, performing heating to 850 DEG C and performing calcining for 50 min, thereby obtaining thenovel adsorbent based on the waste coal gangue for treating waste water containing Zn<2+>. The adsorbent based on waste coal gangue is characterized in that the waste coal gangue is applied to treatment of the waste water containing heavy metal Zn<2+>, the adsorbent is simple and convenient to prepare and low in cost, and the removal efficiency can reach about 92%.

Description

technical field [0001] The invention relates to a waste coal gangue-based method that can efficiently remove Zn in industrial wastewater 2+ The adsorbent belongs to the field of resource utilization of solid waste. Background technique [0002] With the advancement of the modernization level of my country's industrial production, domestic wastewater and industrial wastewater have increased in large quantities, and heavy metal pollution has become increasingly serious. Due to its non-biodegradability, metal ions accumulate continuously and gradually increase in quantity along the food chain. Therefore, their toxic and side effects are more obvious in animals with high nutritional levels, which can cause nervous dysfunction, softening of bones, failure of stomach function, and poisoning of animals and plants. How to efficiently remove heavy metals in wastewater is an urgent task. [0003] Coal gangue is solid waste generated during coal production and processing. The annual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/04B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/103B01J2220/42B01J2220/4887C02F1/281C02F2101/20
Inventor 包红旭张欣张浩杨华苏弘治张馨月吕志忠李良玉黄颖芝刘唯玉杨雨萌陈阳
Owner LIAONING UNIVERSITY
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