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Method for preparing magnetic adsorbent for methylene blue wastewater treatment

A magnetic adsorbent, wastewater treatment technology, applied in textile industry wastewater treatment, water/sewage treatment, adsorbed water/sewage treatment, etc., to achieve the effect of good adsorption effect and simple preparation method

Inactive Publication Date: 2016-10-26
LANZHOU CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrogen protection is required for the preparation of traditional magnetic nanomaterials

Method used

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  • Method for preparing magnetic adsorbent for methylene blue wastewater treatment
  • Method for preparing magnetic adsorbent for methylene blue wastewater treatment
  • Method for preparing magnetic adsorbent for methylene blue wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A kind of preparation method for the magnetic adsorbent in methylene blue wastewater treatment comprises the following steps:

[0028] ⑴ FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O was mixed at a mass ratio of 1:1.2 (g / g), dissolved in deionized water that was 8 times the mass of the mixture, and heated to 85°C, and then sequentially added ammonia water with a mass concentration of 25% and a mass concentration of 1% Sodium humate solution, stirred mechanically at 85°C for 30min, cooled to room temperature, and obtained humic acid-modified nano-Fe 3 o 4 Dispersions.

[0029] Among them: the volume ratio (mL / mL) of ammonia water to deionized water is 1:4; the volume ratio (mL / mL) of sodium humate solution to deionized water is 1:1.5.

[0030] (2) Nano-Fe modified by humic acid 3 o 4 The dispersion is magnetically separated with a permanent magnet, and the supernatant is removed to obtain humic acid-modified nano-Fe 3 o 4 .

[0031] (3) Nano-Fe modified by hu...

Embodiment 2

[0032] Embodiment 2 A kind of preparation method for the magnetic adsorbent in methylene blue wastewater treatment comprises the following steps:

[0033] ⑴ FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O was mixed at a mass ratio of 1:1.8 (g / g), dissolved in deionized water 15 times the mass of the mixture, and heated to 95°C, and then sequentially added ammonia water with a mass concentration of 25% and a mass concentration of 1% Sodium humate solution, mechanically stirred at 95°C for 50min, and cooled to room temperature to obtain humic acid-modified nano-Fe 3 o 4 Dispersions.

[0034] Among them: the volume ratio (mL / mL) of ammonia water to deionized water is 1:8; the volume ratio (mL / mL) of sodium humate solution to deionized water is 1:3.

[0035] (2) Nano-Fe modified by humic acid 3 o 4 The dispersion is magnetically separated with a permanent magnet, and the supernatant is removed to obtain humic acid-modified nano-Fe 3 o 4 .

[0036] (3) Nano-Fe modified by humic acid ...

Embodiment 3

[0037] Embodiment 3 A kind of preparation method for the magnetic adsorbent in methylene blue wastewater treatment comprises the following steps:

[0038] ⑴ FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O was mixed at a mass ratio of 1:1.5 (g / g), dissolved in deionized water 12 times the mass of the mixture, and heated to 90°C, then sequentially added ammonia water with a mass concentration of 25% and a mass concentration of 1% Sodium humate solution, mechanically stirred at 90°C for 40min, and cooled to room temperature to obtain humic acid-modified nano-Fe 3 o 4 Dispersions.

[0039] Among them: the volume ratio (mL / mL) of ammonia water to deionized water is 1:6; the volume ratio (mL / mL) of sodium humate solution to deionized water is 1:2.5.

[0040] (2) Nano-Fe modified by humic acid 3 o 4 The dispersion is magnetically separated with a permanent magnet, and the supernatant is removed to obtain humic acid-modified nano-Fe 3 o 4 .

[0041] (3) Nano-Fe modified by humic acid 3 ...

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Abstract

The invention relates to a method for preparing a magnetic adsorbent for methylene blue wastewater treatment. The method comprises the steps of 1, mixing FeSO4.7H2O with FeCl3.6H2O, dissolving the mixture in deionized water, conducting heating, adding ammonium hydroxide and sodium humate solution in sequence, conducting mechanical stirring, and reducing temperature to room temperature, so that humic acid modified nanometer Fe3O4 dispersion liquid is obtained; 2, conducting magnetic separation on the humic acid modified nanometer Fe3O4 dispersion liquid to obtain humic acid modified nanometer Fe3O4; 3, washing the humic acid modified nanometer Fe3O4 with absolute ethyl alcohol and deionized water in sequence till neutral, and conducting vacuum drying to obtain Fe3O4 / HA. The method is simple and easy to implement, and the obtained product is easy to separate and good in adsorption effect.

Description

technical field [0001] The invention relates to the technical field of decolorization treatment of printing and dyeing wastewater, in particular to a preparation method of a magnetic adsorbent used in the treatment of methylene blue wastewater. Background technique [0002] my country is a major producer of dyes, and the output of dyes accounts for about 60% of the world. However, in the dye production process, every 1 ton of dye produced will have 2% of the product lost with water, and the loss in the printing and dyeing process is even greater, about 10% of the dye used [Xu Weichang. Status and Prospects of Wastewater Treatment in Dyestuff Industry[ J]. Dye Industry, 2002, 39(6): 35-39.]. This not only caused great economic losses, but also brought serious pollution to the environment. Among the many wastewater treatment methods, adsorption is one of the most commonly used decolorization techniques. Adsorption method can effectively remove highly toxic and refractory po...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28C02F1/28C02F103/30C02F101/30
CPCB01J20/06B01J20/24B01J20/28009C02F1/286C02F1/288C02F2101/308C02F2103/30
Inventor 魏云霞马明广李生英赵国虎孙看军
Owner LANZHOU CITY UNIV
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