Preparation method of modified montmorillonite adsorbent for treating zinc-bearing wastewater

A technology of montmorillonite and adsorbent, which is applied in the field of preparation of modified montmorillonite adsorbent, which can solve the problems of inability to achieve good treatment effect, lack of too much research, increase of zinc ion adsorption performance, etc., and achieve high industrial utilization value , a wide range of raw materials, and the effect of reducing industrial costs

Inactive Publication Date: 2017-02-22
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zinc ion adsorption performance of montmorillonite itself is not high, but after specific modification, its zinc ion adsorption performance can be greatly increased
At present, the research on the inorganic and organic modification of montmorillonite to increase its adsorption performance for spe

Method used

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Experimental program
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Example Embodiment

[0020] The invention provides a preparation method of modified montmorillonite adsorbent for treating zinc-containing wastewater, including the following operation steps:

[0021] (1) Preparation of montmorillonite suspension: through pretreatment measures such as washing, drying, crushing, sieving, etc., montmorillonite is purified into a fine powder material of 100-150 mesh, and the ratio of solid to liquid mass with distilled water is 0.1~0.2 formulated into montmorillonite suspension;

[0022] (2) Preparation of FN intercalating agent: mix 1mol / L ferric nitrate solution and 1mol / L sodium hydroxide solution in the following proportions: 1mol / L ferric nitrate solution 10-12mL, 1mol / L sodium hydroxide solution 20~ 25mL;

[0023] (3) Inorganic modification of FN intercalation agent: Under the condition of constant temperature of 60~80℃, the montmorillonite suspension prepared in step (1) and the FN intercalation agent prepared in step (2), press 5 :1~3:1 ratio is mixed evenly, full...

Example Embodiment

[0033] Example 1:

[0034] The montmorillonite is washed, dried, crushed, and sieved, and the montmorillonite powder material with a particle size of 140-150 mesh is selected, and the montmorillonite is made into a suspension with a solid-liquid mass ratio of 0.1-0.2 with distilled water FN intercalation agent was prepared with ferric nitrate solution and sodium hydroxide solution, and added to the montmorillonite suspension for inorganic modification at a constant temperature of 60°C; the FN intercalation modified montmorillonite suspension was subjected to After purification by centrifugation, precipitation, and washing, it is made into FN intercalation montmorillonite suspension with distilled water at a solid-liquid mass ratio of 0.1~0.2; SDS intercalation agent is prepared with sodium lauryl sulfate, nitric acid and absolute ethanol , Added to the FN intercalated montmorillonite suspension for secondary organic modification; prepared PAM flocculant with polyacrylamide, nitri...

Example Embodiment

[0037] Example 2:

[0038] The montmorillonite is washed, dried, crushed, and sieved. The montmorillonite powder material with a particle size of 100-115 mesh is selected, and the montmorillonite is made into a suspension with a solid-liquid mass ratio of 0.1-0.2 with distilled water FN intercalation agent was prepared with ferric nitrate solution and sodium hydroxide solution, and added to the montmorillonite suspension for inorganic modification at a constant temperature of 60°C; the FN intercalation modified montmorillonite suspension was subjected to After purification by centrifugation, precipitation, and washing, it is made into FN intercalation montmorillonite suspension with distilled water at a solid-liquid mass ratio of 0.1~0.2; SDS intercalation agent is prepared with sodium lauryl sulfate, nitric acid and absolute ethanol , Added to the FN intercalated montmorillonite suspension for secondary organic modification; prepared PAM flocculant with polyacrylamide, nitric ac...

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Abstract

A preparation method of a modified montmorillonite adsorbent for treating zinc-bearing wastewater includes the steps of (1), preparing montmorillonite turbid liquid, namely purifying montmorillonite into a fine powder material through pretreatment measurements and preparing the montmorillonite turbid liquid from the fine powder material and distilled water; (2), preparing an FN intercalator; (3), subjecting the FN intercalator to inorganic modification; (4), purifying FN intercalated montmorillonite; (5), preparing an SDS intercalator; (6), subjecting the SDS intercalator to organic modification; (7) preparing a PAM flocculant; (8), purifying SDS intercalated montmorillonite, dropwise adding the PAM flocculant into secondarily-modified montmorillonite turbid liquid obtained in the step (6), stirring evenly rapidly prior to high-speed centrifugation and filtration, washing filter residues with deionized water to be neutral, and drying at a low temperature so as to obtain purified SDS intercalated montmorillonite powder; (9), subjecting the SDS intercalated montmorillonite powder obtained in the step (8) to high-temperature roasting so as to obtain the modified montmorillonite adsorbent.

Description

technical field [0001] The invention relates to the field of industrial sewage treatment, in particular to the preparation technology of a modified montmorillonite adsorbent for treating zinc-containing wastewater. Background technique [0002] In recent years, with the development of the industrial field, people's demand for water resources has gradually increased, and at the same time, the global water pollution problem has become more prominent. Human industrial activities have caused a large amount of sewage discharge, resulting in a gradual increase in the concentration of heavy metal pollutants in the water on the earth's surface, which seriously threatens the survival and living environment of human beings. In particular, the treatment of some highly active heavy metal ion wastewater, such as zinc-containing wastewater, has attracted great attention from the public and many experts due to its difficulty in treatment, poor effect, and high cost, and has become a must i...

Claims

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Application Information

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IPC IPC(8): B01J20/12C02F1/28B01J20/30
CPCB01J20/12C02F1/281
Inventor 周智芳孙寒雪赵霞张婷张庆芳贾小宁
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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