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Modified slag adsorbent for anionic dye wastewater treatment and preparation method thereof

An anionic dye and adsorbent technology, which is applied in textile industry wastewater treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as polluting the environment, affecting crop growth, and endangering human health. The effect of large amount, short adsorption equilibrium time, and low price

Inactive Publication Date: 2017-08-01
GUANGDONG UNIV OF EDUCATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Slag is the industrial waste slag discharged from blast furnace smelting pig iron. However, the continuous development of the iron and steel industry has brought a large amount of slag discharge. If it is not comprehensively utilized, the accumulated waste slag will pollute the environment, affect the growth of crops, and even endanger human health.

Method used

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  • Modified slag adsorbent for anionic dye wastewater treatment and preparation method thereof
  • Modified slag adsorbent for anionic dye wastewater treatment and preparation method thereof
  • Modified slag adsorbent for anionic dye wastewater treatment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:

[0031] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 100°C for 3 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;

[0032] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 4mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 3.5mol / L L, the concentration of sodium chloride is 0.1mol / L;

[0033] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to 30g of the slag in step (1), stir for 2h (the rotating speed of stirring is 500r / min), let stand for 15h, and place at 100 ℃ drying oven for 2 hours, and ground to obtain the modified slag adsorbent.

[0034] The specific surface area of ​​slag before modification is 51.3m 2 / ...

Embodiment 2

[0037] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:

[0038] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 80°C for 5 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;

[0039] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 8mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 6mol / L , the concentration of sodium chloride is 0.1mol / L;

[0040] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to 30g of slag in step (1), stir for 1h (rotation speed: 500r / min), let stand for 12h, and dry at 120°C Dry in the box for 3 hours, and grind to obtain the modified slag adsorbent.

[0041] The specific surface area of ​​slag before modification is 51.3m 2 / g, the porosity of slag be...

Embodiment 3

[0044] A modified slag adsorbent for anionic dye wastewater treatment, prepared by the following method:

[0045] (1) Slag pretreatment: wash the slag with distilled water to remove impurities, dry it at 120°C for 2 hours, pulverize it with a pulverizer, sieve it with a 250-mesh screen, and set aside;

[0046] (2) Preparation of solution: sodium chloride is made into sodium chloride solution, then 6mol / L hydrochloric acid is mixed with 1mol / L sodium chloride solution to obtain a mixed solution, and the concentration of hydrochloric acid in the mixed solution is 2.5mol / L L, the concentration of sodium chloride is 0.1mol / L;

[0047] (3) Modified slag: Slowly add 90mL of the mixed solution in step (2) to the slag in 30g of step (1), stir for 5h (the rotating speed of stirring is 500r / min), let stand for 20h, and place at 80 ℃ in a drying oven for 3 hours, and ground to obtain a modified slag adsorbent.

[0048] The specific surface area of ​​slag before modification is 51.3m 2...

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Abstract

The present invention belongs to the technical field of environmental materials, and discloses a modified slag adsorbent for anion dye wastewater treatment, and a preparation method thereof. The preparation method comprises: washing, drying, crushing and screening slag; preparing a sodium chloride solution, and mixing the sodium chloride solution and hydrochloric acid to obtain a mixed solution; and slowly adding the mixed solution to the slag, carrying out a stirring reaction, standing, drying, and grinding to obtain the modified slag adsorbent. According to the present invention, the preparation method has characteristics of simpleness, rich raw material source, low price, and waste recycling; after the modification, the micro-pores of the slag are increased, the specific surface area is increased, and the adsorption capacity of the adsorbent is further enhanced; and the adsorbent of the present invention has the good anion dye wastewater treatment effect, has the high equilibrium adsorption capacity, and especially has the good Acid Green 27 adsorption effect.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and in particular relates to a modified slag adsorbent for anionic dye wastewater treatment and a preparation method thereof. Background technique [0002] With the rapid development of industry, especially the development of textile printing and dyeing industry, there are more and more industrial wastewater, and the difficulty of wastewater treatment is also increasing. In the textile printing and dyeing industry, dye wastewater contains a variety of refractory organic substances, most of which are aromatic compounds with chromogenic groups, which are highly polluting. The dye wastewater is mostly acidic and directly affects the pH value of the water body, and the pollutant components of dye wastewater are complex, the content is high, the chromaticity, chemical oxygen demand and biological oxygen demand are high, and the treatment of dye wastewater is difficult. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/30C02F103/30
Inventor 赵丹华邱钦标柳晓俊王燕妮黄梦茹何伟发刘嘉敏
Owner GUANGDONG UNIV OF EDUCATION
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