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Nickel slag adsorbing material for recovering heavy metal ions in wastewater and preparation method thereof

A technology of heavy metal ions and adsorption materials, applied in the direction of adsorption of water/sewage treatment, water pollutants, other chemical processes, etc., can solve the problem of low recycling rate of nickel slag, achieve significant economic and social benefits, and simple operation process , The effect of strong market competitiveness

Active Publication Date: 2014-06-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a nickel slag adsorption material for the adsorption of heavy metal ions in waste water and a preparation method thereof for the low recycling rate of nickel slag at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, nickel slag is used to develop a renewable adsorption material for the recovery of heavy metal ions. Among the raw materials: Al / Fe molar ratio is 0.5, Al / Fe mass ratio is 0.24, converted into nickel slag and Al(OH) 3 The mass ratio is 18.92g Al(OH) per 100g nickel slag 3 .

[0031]This example utilizes nickel slag to develop the method for regenerating the adsorption material of heavy metal ion, and it comprises the following steps:

[0032] (1) Pretreatment

[0033] The nickel slag is wet-milled in a ball mill for 20 hours. After the ground slurry is taken out, it is placed in an electric blast constant temperature drying oven at 100°C to dry the water, and then passed through a 100-mesh sieve to obtain aggregated materials for later use.

[0034] (2) Sample preparation

[0035] Nickel slag and Al(OH) 3 After weighing according to the formula (Al / Fe molar ratio 0.5, Al / Fe mass ratio 0.24), add to the mixer and mix evenly; then add organic water fo...

Embodiment 2

[0040] In this example, nickel slag is used to develop a renewable adsorption material for the recovery of heavy metal ions. Among the raw materials: Al / Fe molar ratio is 0.67, Al / Fe mass ratio is 0.32, converted into nickel slag and Al(OH) 3 The mass ratio is 26.33g Al(OH) per 100g nickel slag 3 .

[0041] This example utilizes nickel slag to develop the method for regenerating the adsorption material of heavy metal ion, and it comprises the following steps:

[0042] (1) Pretreatment

[0043] Put the nickel slag in a ball mill for wet ball milling for 25 hours. After taking out the ground slurry, put it in an electric blast constant temperature drying box to dry the water at 80°C, and then pass it through a 100-mesh sieve to obtain the aggregated material for later use.

[0044] (2) Sample preparation

[0045] Nickel slag and Al(OH) 3 After weighing according to the formula (Al / Fe molar ratio 0.67, Al / Fe mass ratio 0.32), add it to the mixer and mix evenly; then add organ...

Embodiment 3

[0050] In this example, nickel slag is used to develop a renewable adsorption material for the recovery of heavy metal ions. Among the raw materials: Al / Fe molar ratio is 1, Al / Fe mass ratio is 0.48, converted into nickel slag and Al(OH) 3 The mass ratio is 41.23g Al(OH) per 100g nickel slag 3 .

[0051] This example utilizes nickel slag to develop the method for regenerating the adsorption material of heavy metal ion, and it comprises the following steps:

[0052] Step (1) is the same as in Example 1.

[0053] (2) Sample preparation

[0054] Nickel slag and Al(OH) 3 After weighing according to the formula (Al / Fe molar ratio 1, Al / Fe mass ratio 0.48), add it to the mixer and mix evenly; then add organic water for granulation, the ratio is to add 8mL organic water per 100g of raw materials, and the granulation is completed Finally, pass through a 50-mesh sieve and stale for 24 hours. The mixture is molded by pressing.

[0055] (3) Sample firing and hydrothermal treatment ...

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Abstract

The invention discloses a nickel slag adsorbing material for recovering heavy metal ions in wastewater and a preparation method thereof. The method comprises the following steps: performing pretreatment on industrial waste nickel slag and low-cost analysis pure reagent aluminum hydroxide taken as main raw materials, pressing, molding, sintering and performing hydro-thermal treatment so as to prepare the nickel slag adsorbing material for recovering heavy metal ions in the wastewater. The adsorbing material prepared by the method has a series of excellent performances, such as high porosity, large specific surface area and high adsorptive property on heavy metal ions such as Pb2+ and Cu2+. In addition, by adoption of a molding method, the prepared adsorbent is diversified in shapes and sizes, can be made into columns, sheets and blocks and has high strength, and regeneration cycle recycling of the adsorbent can be realized. The resource utilization of industrial waste nickel slag is realized, a novel thought is provided for developing low-cost adsorbents, the wastes are used for treating the pollution, and the application prospects are wide.

Description

technical field [0001] The invention belongs to the field of adsorption material preparation, relates to comprehensive utilization of solid waste and waste water treatment technology, in particular to a nickel slag adsorption material used for recovering heavy metal ions in waste water and a preparation method thereof. Background technique [0002] Nickel slag is a solid waste slag produced during the smelting process of metallic nickel and nickel alloys, that is, a granulated slag formed after the high-temperature melt is quenched in water. difference, where SiO 2 The content is 30~50wt%, Fe 2 o 3 content of 30~60 wt %, CaO content of 1.5 ~5 wt %, MgO content of 1 ~15 wt %, Al 2 o 3 The content is 2.5~6 wt%. Compared with granulated blast furnace slag, CaO, MgO and Al 2 o 3 content is much lower, but SiO 2 and Fe 2 o 3 The content is much higher. Nickel slag is an amorphous, non-crystalline substance whose molten phase is FeO-SiO 2 Mainly, it is different from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F101/20
Inventor 于岩李杰张庭士庄国鑫郭思怡吴琼符成
Owner FUZHOU UNIV
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