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Method for treating water by using zero-valent iron-nickel bi-metal activated persulfate

A technology for activating persulfate and persulfate, which is applied in the field of water pollution treatment to achieve simple operation, good degradation effect, and the effect of ensuring water quality safety

Inactive Publication Date: 2015-12-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of the above-mentioned existing water body pollution treatment technology, and provide a technology for effectively, economically and feasiblely removing micro-pollutants in water, that is, to use zero-valent iron-nickel double metal to activate persulfuric acid Salt removal technology for micro-pollutants in water. This technology can quickly remove pharmaceuticals and personal care products (PPCPs), algae toxins, pesticides, petroleum organic pollutants and various refractory organic substances in water. It can be applied to drinking water treatment , sewage advanced treatment, regenerated water treatment, industrial water treatment and groundwater treatment, etc., can well solve the problem of various toxic and harmful micro-pollutants that are often detected in drinking water, sewage, industrial wastewater, surface water, and groundwater.

Method used

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  • Method for treating water by using zero-valent iron-nickel bi-metal activated persulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method for removing micro-pollutants in water by using zero-valent iron-nickel double metal activated persulfate, the steps are as follows:

[0034] (1) Preparation of zero-valent iron-nickel bimetal: Add zero-valent iron powder to a solution containing divalent nickel (the nickel salt solution needs to be prepared in advance) to undergo a rapid replacement reaction to form metallic nickel, which is attached to the iron surface, forming an iron-nickel bimetal.

[0035] (2) Add the prepared zero-valent iron-nickel bimetal to water containing micro-pollutants, and then add persulfate to complete the removal of micro-pollutants in water.

[0036] Wherein, the molar ratio of the zero-valent iron to persulfate is 1:1-80:1; the molar ratio of the zero-valent iron to nickel is 2:1-500:1.

Embodiment 2

[0038] The method for removing micro-pollutants in water by using zero-valent iron-nickel double metal activated persulfate, the steps are as follows:

[0039] (1) Preparation of zero-valent iron-nickel bimetal: Add scrap iron scraps to a solution containing divalent nickel (the nickel salt solution needs to be prepared in advance) to undergo a rapid replacement reaction to form metallic nickel, which is attached to the surface of the iron , forming an iron-nickel bimetal.

[0040](2) Add the prepared zero-valent iron-nickel bimetal to water containing micro-pollutants, and then add persulfate to complete the removal of micro-pollutants in water.

[0041] Wherein, the molar ratio of the zero-valent iron to persulfate is 1:1-80:1; the molar ratio of the zero-valent iron to nickel is 2:1-500:1.

Embodiment 3

[0043] The method for removing micro-pollutants in water by using zero-valent iron-nickel double metal activated persulfate, the steps are as follows:

[0044] (1) Preparation of zero-valent iron-nickel bimetallic: add the solution containing divalent nickel into the zero-valent iron filter column to undergo a rapid replacement reaction to generate metal nickel, which is attached to the surface of iron to form an iron-nickel bimetallic filter column .

[0045] (2) Add persulfate to water containing micro-pollutants, and then filter the water through a zero-valent iron-nickel bimetal filter column to complete the removal of micro-pollutants in water.

[0046] Wherein, the molar ratio of the zero-valent iron to persulfate is 1:1-80:1; the molar ratio of the zero-valent iron to nickel is 2:1-500:1.

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Abstract

The invention discloses a method for treating water by using zero-valent iron-nickel bi-metal activated persulfate. According to the method, the zero-valent iron-nickel bi-metal activated persulfate is used, and micropollutants in the water are removed. The zero-valent iron-nickel bi-metal activated persulfate is used for efficiently generating high-oxidizing-property sulphate radical and high-oxidizing-property hydroxyl radical to attack the micropollutants, the micropollutants are degraded, and the purpose of quickly and thoroughly removing various poisonous and harmful micropollutants such as polychlorinated biphenyl, brominated flame retardants, medicines, personal care products (PPCPs) and algal toxin can be achieved. Compared with the existing the method for treating water by using zero-valent iron activated persulfate, the method has the advantages of high activating efficiency, high yield of the sulphate radical, high micropollutants removing efficiency and the like, is convenient and easy to operate, obvious in effect and wide in pH (potential of hydrogen) using range, and can be used for ground water remediation, treatment of industrial water comprising electroplating wastewater, wastewater of hospitals, printing and dyeing wastewater, treatment of drinking water, treatment of sewage and the like.

Description

technical field [0001] The invention belongs to the technical field of water body pollution treatment. More specifically, it relates to a water treatment method of zero-valent iron-nickel bimetallic activated persulfate. Background technique [0002] In recent years, with the rapid development of industry and agriculture and the continuous improvement of people's living standards, a variety of man-made chemicals are playing an increasingly important role in daily life. However, while these chemicals bring convenience to people's lives, they are also continuously discharged into water bodies along with industrial wastewater and domestic sewage, becoming emerging pollutants in the environment. Such pollutants, such as: pharmaceuticals and personal care products (PPCPs), persistent organic pollutants (POPs), pesticides and petroleum organic pollutants, etc., [0003] The above-mentioned toxic and harmful pollutants exist in very low concentrations in water bodies, but they ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 方晶云望婷婷侯少东杨欣
Owner SUN YAT SEN UNIV
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