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Method for remediating nickel and chlorinated organic compound combined polluted environmental water

A technology for chlorinated organic compounds and complex pollution, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc., to achieve the effects of promoting dispersion, increasing reaction sites, and improving reduction efficiency

Inactive Publication Date: 2017-12-19
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the method of using bentonite to load zero-valent iron to efficiently and synergistically remediate Ni(II) and chlorinated organic compound-contaminated water has not been reported in the literature or published in patents.

Method used

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  • Method for remediating nickel and chlorinated organic compound combined polluted environmental water
  • Method for remediating nickel and chlorinated organic compound combined polluted environmental water
  • Method for remediating nickel and chlorinated organic compound combined polluted environmental water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Bentonite-loaded nanometer zero-valent iron and zero-valent iron respectively repair Ni(II) (200mg / L) and chloronitrobenzene (30mg / L) composite polluted water (pH 6) comparison, according to the following steps:

[0026] (1) in N 2 Under protection, 0.5g / L sodium bentonite, 0.05mol / L FeSO 4 ·7H 2 O and 0.1mol / L NaBH 4 Mix and stir for 4 hours, wash with deoxygenated water and ethanol, and vacuum freeze-dry to prepare bentonite-supported nano-iron.

[0027] (2) Weigh the bentonite-loaded zero-valent iron (30mg iron content) prepared in step (1) and the zero-valent iron containing the same amount of Fe and add them to the solution containing 200mg / L Ni(II) and 30mg / L chlorinated In the complex pollution wastewater of nitrobenzene (pH adjusted to 6), in N 2 Under protection, shake the reaction for 2 hours (150 rpm, 25°C). After the reaction, the concentration of residual Ni(II) and other products and concentrations in the wastewater were determined by atomic absorptio...

Embodiment 2

[0029] Bentonite-loaded nano-zero-valent iron repairs Ni(II) (100mg / L) and dichlorophenol (20mg / L) composite polluted water (pH 6), according to the following steps:

[0030] (1) in N 2 Under protection, 0.5g / L sodium bentonite, 0.05mol / L FeSO 4 ·7H 2 O and 0.1mol / L NaBH 4 Mix and stir for 2 hours, wash with deoxygenated water and ethanol, and vacuum freeze-dry to prepare bentonite-loaded nano-iron.

[0031] (2) Weigh the bentonite-loaded zero-valent iron (60 mg iron content) prepared in step (1) and add it to the composite polluted wastewater containing 100 mg / L Ni(II) and 20 mg / L dichlorophenol (pH adjusted to 6 ), at N 2 Under protection, shake the reaction for 4 hours (150 rpm, 25°C). After the reaction, the concentration of residual Ni(II) and other products and concentrations in the wastewater were determined by atomic absorption spectroscopy and high performance liquid chromatography, respectively. The results show that after 60 minutes of reaction, dichlorophenol...

Embodiment 3

[0033] The comparison of bentonite-loaded nano-zero-valent iron repairing Ni(II) (80mg / L) and dichloroethane (30mg / L) composite polluted water (pH 6) was carried out according to the following steps:

[0034] (1) in N 2 Under protection, 0.5g / L sodium bentonite, 0.05mol / L FeSO 4 ·7H 2 O and 0.1mol / L NaBH 4 Mix and stir for 2 hours, wash with deoxygenated water and ethanol, and vacuum freeze-dry to prepare bentonite-loaded nano-iron.

[0035](2) Weigh the bentonite-loaded zero-valent iron (40mg iron content) prepared in step (1) and zero-valent iron containing the same amount of Fe, and add them to the solution containing 80mg / L Ni(II) and 30mg / L dichloro In the complex pollution wastewater of methane (pH adjusted to 6), the N 2 Under protection, shake the reaction for 4 hours (150 rpm, 25°C). After the reaction, the concentration of residual Ni(II) and other products and concentrations in the wastewater were determined by atomic absorption spectroscopy and gas chromatogra...

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Abstract

The invention relates to a method for remediating nickel and chlorinated organic compound combined polluted environmental water. The method comprises the following steps: (1) preparing bentonite-loaded zero-valent iron, namely, mixing bentonite, FeSO4.7H2O and NaBH4; stirring and reacting; washing with deoxidized water and ethyl alcohol; then freezing and drying in vacuum to obtain the bentonite-loaded zero-valent iron; (2) adjusting pH of Ni(II) and chlorinated organic compound combined polluted water to be 3-7; (3) adding the bentonite-loaded zero-valent iron prepared in step (1) to the combined polluted water in step (2) under inert gas protection. The method is simple in processes, low in cost, and free from secondary pollution to the environment, and is a simple, effective and low-cost method for remediating Ni(II) and chlorinated organic compound combined polluted water.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for efficiently repairing complex pollution of heavy metal Ni(II) and chlorinated organic matter in polluted water by using bentonite loaded with zero-valent iron. Background technique [0002] Chlorinated organic substances are widely used in chemical, pesticide, dye and electronics industries. These substances have teratogenic, carcinogenic and mutagenic effects, and their toxicity is mainly closely related to the chlorine atom in the molecular structure. If the chlorine atoms on the chlorinated organic matter can be effectively removed, the harm of such pollutants to the ecological environment and people's health can be greatly reduced. At the same time, nickel-containing alloy parts widely used in industry, residual Ni(II) ions in chemical raw materials, and metallic nickel in electronic waste, etc., release Ni(II) ions to the environment through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F9/04C02F101/20C02F101/36
CPCB01J20/12B01J20/0229C02F1/281C02F1/66C02F1/705C02F2101/20C02F2101/36
Inventor 李益民董华平栗占峰黄琎
Owner SHAOXING UNIVERSITY
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