Hydrotalcite-like compound used for raw water treatment

A hydrotalcite and raw water technology, applied in the direction of adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc.

Inactive Publication Date: 2010-07-21
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, no other types, such as Zn / Fe hydrotalcites, have been reported

Method used

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  • Hydrotalcite-like compound used for raw water treatment
  • Hydrotalcite-like compound used for raw water treatment
  • Hydrotalcite-like compound used for raw water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment one: see attached figure 1 Shown:

[0034] In the first step, the amount of substance is used as the measurement basis, and FeCl2 4H 2 The amount of O substance is 1 part; at 30°C, 1 part of ZnCl 2 ·6H 2 O with 1 part of FeCl 2 4H 2 O was dissolved in 100ml deionized water to obtain solution A;

[0035] In the second step, take an appropriate amount of 1mol / L NaOH solution and add it to solution A to adjust the pH to about 7, and stir for 2 hours to obtain solution B;

[0036] In the third step, take 1 part of hydrogen peroxide, prepare a hydrogen peroxide solution with a mass fraction of 6% with deionized water, add solution B to dissolve Fe 2+ Oxidized to Fe 3+ , aged at 30°C for 3h, filtered with suction, washed with deionized water until the pH was about 7, and then dried at 70°C for 16h to obtain hydrotalcite-like.

[0037] Figure 2 ~ Figure 4 The spectrum for characterizing hydrotalcite-like.

Embodiment 2

[0038] Embodiment two: see attached figure 1 Shown:

[0039] In the first step, the amount of substance is used as the measurement basis, and FeCl 2 4H 2 The amount of O substance is 1 part; at 10°C, 2 parts of ZnCl 2 ·6H 2 O with 1 part of FeCl 2 4H 2 O was dissolved in deionized water to obtain solution A;

[0040] In the second step, take an appropriate amount of 1mol / L NaOH solution and add it to solution A to adjust the pH to about 8, and stir for 2 hours to obtain solution B;

[0041] In the third step, take 1 part of hydrogen peroxide, prepare a hydrogen peroxide solution with a mass fraction of 6% with deionized water, add solution B to dissolve Fe 2+ Oxidized to Fe 3+ , aged at 10°C for 6h, filtered with suction, washed with deionized water until the pH was about 6.5, and then dried at 80°C for 24h to obtain hydrotalcite-like.

[0042] Figure 5 Elemental analysis diagram for hydrotalcite-like.

Embodiment 3

[0043] Embodiment three: see attached figure 1 Shown:

[0044] In the first step, the amount of substance is used as the measurement basis, and FeCl 2 4H 2 The amount of O substance is 1 part; at 10°C, 4 parts of ZnCl 2 ·6H 2 O with 1 part of FeCl 2 4H 2 O was dissolved in deionized water to obtain solution A;

[0045] In the second step, take an appropriate amount of 1mol / L NaOH solution and add it to solution A to adjust the pH to about 7, and stir for 2 hours to obtain solution B;

[0046] In the third step, take 1 part of hydrogen peroxide, prepare a hydrogen peroxide solution with a mass fraction of 6% with deionized water, add solution B to dissolve Fe 2+ Oxidized to Fe 3+ , aged at 10°C for 6h, filtered with suction, washed with deionized water until the pH was about 8, and then dried at 80°C for 24h to obtain hydrotalcite-like.

[0047] Image 6 Elemental analysis diagram for hydrotalcite-like.

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Abstract

The invention discloses a hydrotalcite-like compound. The chemical formula of the hydrotalcite-like compound is shown as follows: [Zn2+1-xFe3+x(OH)2][Cl-]x.H2O, wherein x=0.5-0.6; the hydrotalcite-like compound can be used as an adsorbent to absorb humic acid in raw water; the hydrotalcite-like compound has good adsorption property on the humic acid in raw water; the maximum adsorption capacity on the humic acid in the raw water can reach higher than 12.2mg / g and is far higher than the maximum adsorption capacity 2.51mg / g of granular active carbon; the rate of adsorption of the hydrotalcite-like compound on the humic acid is shown as follows: the adsorption capacity reaches more than 90 percent of the maximum adsorption capacity in 5 minutes, and adsorption equilibrium is achieved in 45 minutes.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic layered materials and the field of sewage purification, and in particular relates to a hydrotalcite-like substance capable of absorbing humic acid in water. Background technique [0002] Humic acid substances widely exist in soil and water bodies in nature, and are mainly formed by the decomposition of animal and plant debris through microorganisms and various physical and chemical processes. They are the main components of organic matter in natural water bodies, accounting for about 50% to 90% of the total organic matter in water % (mass fraction). Humic acid mainly includes humic acid, fulvic acid and hydrophilic small molecule organic matter. Because humic acid produces unpleasant colors and odors in water bodies, especially in the process of chlorine disinfection, it will produce a variety of by-products such as trihalomethanes that are carcinogenic, teratogenic, and mutagenic to human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02B01J20/06C02F1/28
Inventor 董延茂鲍治宇赵丹程琛杰
Owner SUZHOU UNIV OF SCI & TECH
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