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Method for removing organic pollutants in water by virtue of ferrous and ferric ion enhanced hydroxylamine/peroxydisulfate system

A peroxodisulfate and organic pollutant technology, applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of slow free radical generation, slow removal of organic pollutants in water, and degradation efficiency Low-level problems, to achieve the effect of simple operation, improved removal rate of organic pollutants, and high removal efficiency

Inactive Publication Date: 2017-06-20
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems of slow generation of free radicals, slow removal of organic pollutants in water and low degradation efficiency existing in the current hydroxylamine / peroxodisulfate reaction system, thereby providing a method for strengthening hydroxylamine / peroxodisulfate with ferrous and iron ions. Method for removing organic pollutants in water by disulfate system

Method used

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  • Method for removing organic pollutants in water by virtue of ferrous and ferric ion enhanced hydroxylamine/peroxydisulfate system
  • Method for removing organic pollutants in water by virtue of ferrous and ferric ion enhanced hydroxylamine/peroxydisulfate system

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specific Embodiment approach 1

[0013] Specific implementation mode one: the method for utilizing ferrous iron and iron ion of the present embodiment to strengthen the hydroxylamine / peroxodisulfate system to remove organic pollutants in water comprises the following steps:

[0014] Use perchloric acid, sodium hydroxide, etc. to adjust the pH value of the water to be treated to 2-6, then add hydroxylamine, peroxodisulfate, ferrous ions and / or iron ions into the water, and stir at a water temperature of 0-35°C After reacting for 10-60 minutes, the method for removing organic pollutants in water by using ferrous iron and iron ions to strengthen the hydroxylamine / peroxodisulfate system is completed. Wherein, the molar concentration ratio of organic pollutants, hydroxylamine, peroxodisulfate and ferrous or iron ions in the water to be treated is 0.001-0.2:0.2-2:1:0.0001-0.1.

[0015] This embodiment includes the following beneficial effects:

[0016] 1. The present invention does not require additional aeration,...

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the hydroxylamine is one or more of hydroxylamine hydrochloride, hydroxylamine perchlorate, hydroxylamine sulfate and hydroxylamine solution mixed in any proportion. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the peroxodisulfate is potassium peroxodisulfate, ammonium peroxodisulfate, sodium peroxodisulfate, calcium peroxodisulfate and peroxodisulfate One or more kinds of magnesium are mixed in any proportion. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for removing organic pollutants in water by virtue of a ferrous and ferric ion enhanced hydroxylamine / peroxydisulfate system, and relates to a method for removing the organic pollutants in the water by virtue of an advanced oxidation technology. The method comprises the following steps: regulating the pH value of a water body to be treated to 2 to 6 by virtue of perchloric acid, sodium hydroxide and the like, then adding hydroxylamine, peroxydisulfate and ferrous ions and / or ferric ions into the water body, and performing stirring reaction for 10 to 60 minutes at the water temperature of 0 to 35 DEG C to implement the method for removing the organic pollutants in the water by virtue of the ferrous and ferric ion enhanced hydroxylamine / peroxydisulfate system. Compared with a hydroxylamine / peroxydisulfate system into which no ferrous or ferric ions are added, the method has the advantages that the active free radical generation rate and the organic pollutant removal rate are higher, and the removal rate of the pollutants in the water can be correspondingly increased by 5 to 40 times. The method is applied to the fields of industrial organic wastewater treatment and groundwater and soil organic pollution remediation.

Description

technical field [0001] The invention relates to a method for removing organic pollutants in water, which is suitable for the fields of industrial organic waste water treatment, underground water and soil organic pollution restoration. Background technique [0002] In recent years, with the rapid development of economy and society, my country's water environment has been seriously polluted, especially the pollution of surface rivers, lakes, groundwater and soil by persistent refractory organic compounds. At present, common remediation methods for surface water, groundwater and soil organic pollution include physical adsorption, chemical reduction, biodegradation, chemical precipitation and advanced oxidation. Among them, the advanced oxidation method can quickly oxidize and degrade organic pollutants in polluted water due to the ability to generate active free radicals with a high redox potential, thereby improving the biodegradability of organic pollutants or completely mine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30C02F101/36
CPCC02F1/66C02F1/72C02F2101/30C02F2101/36C02F2305/023
Inventor 邹景刘鑫蔡婳婳苑宝玲周真明李飞廖晓斌刘淑坡
Owner HUAQIAO UNIVERSITY
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