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Method for removing arsenic in water through combination of oxidization composite chemical and light

A compound agent and water removal technology, which is applied in the field of water treatment to ensure water quality safety, convenient management, and good removal effect

Inactive Publication Date: 2012-08-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although commercial activated carbon has been proven to have a very low ability to remove As(Ⅲ), it has a certain adsorption capacity for As(Ⅴ), and there are few research reports on the use of activated carbon to directly adsorb arsenic.

Method used

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  • Method for removing arsenic in water through combination of oxidization composite chemical and light
  • Method for removing arsenic in water through combination of oxidization composite chemical and light
  • Method for removing arsenic in water through combination of oxidization composite chemical and light

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specific Embodiment approach 1

[0035] Specific Embodiment 1: In this embodiment, the method for removing arsenic in water by oxidative composite reagent / photocoupler is carried out in the following manner: add oxidative composite reagent to the treatment system and stir, then light irradiation, use activated carbon adsorption after contact oxidation, and complete Removal of arsenic in water; wherein the oxidizing composite agent is composed of at least two composites of potassium persulfate, sodium persulfate, calcium persulfate, ammonium persulfate, potassium monopersulfate, sodium monopersulfate, calcium monopersulfate and ammonium monopersulfate The dosage of the oxidizing compound agent is based on the molar equivalent ratio of the oxidizing compound agent to the arsenic in water of 1~100:1.

[0036] In this embodiment, when the oxidative composite agent is composed of several kinds, they are mixed in any volume ratio.

specific Embodiment approach 2

[0037] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the oxidation compound agent and activated carbon are added to the treatment system at the same time, and then light irradiation is carried out, so that the oxidation and adsorption of arsenic are carried out simultaneously in the same system. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: This embodiment differs from Embodiment 1 in that the treatment system is groundwater. Others are the same as in the first embodiment.

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Abstract

The invention provides a method for removing arsenic in water through combination of an oxidization composite chemical and light. The oxidization composite chemical is added into a treatment system to be stirred, light irradiation is performed, and activated carbon adsorption is performed after contact oxidation. The oxidization composite chemical is formed by compositing at least two of potassium persulfate, sodium persulfate, calcium persulfate, ammonium persulfate, potassium monopersulfate, sodium monopersulfate, calcium monopersulfate and ammonium monopersulfate, and the adding amount of the oxidization composite chemical is according to the mole equivalence ratio of the oxidization composite chemical to the arsenic in the water, namely 1-100:1. The method for removing the arsenic in the water through combination of the oxidization composite chemical and the light has good removing effect on inorganic arsenic and organic arsenide. A reactor can be conveniently designed, the requirements of various different water bodies are met, and the method comes into use as soon as possible. The operation is economic, and the management is convenient.

Description

technical field [0001] The invention relates to a water treatment method. Specifically, a method for removing arsenic from water. Background technique [0002] Arsenic is a toxic element that widely exists in nature. According to epidemiological surveys, arsenic compounds may cause human skin cancer, lung cancer, and bladder cancer, and have been recognized as carcinogens by authoritative organizations such as WHO and the US EPA. The research results also show that arsenic has a great correlation with certain diseases . With the intensification of natural differentiation and the mining and smelting of arsenic-containing ores and the large-scale application of arsenic-containing materials caused by more and more human activities, arsenic pollution in water has become a worldwide problem. Water bodies in some countries in Southeast Asia and many areas in my country, especially groundwater, have been seriously polluted by arsenic, which has caused many local arsenic poisonin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/20
Inventor 刘桂芳李旭春陆洪宇王春丽米海蓉于树芳孙亚全
Owner HARBIN ENG UNIV
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