Method for removing arsenic by using Fe (II) and Mn (II) in underground water

A groundwater and determination method technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve the problems of not considering the full utilization of composite oxidizing flocculants, high cost of chemicals, and difficulty in application , to achieve the effect of long-term stability of arsenic removal, easy operation and low operating cost.
CN102583810AInactive Publication Date: 2012-07-18RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for treating underground arsenic water by using Fe (II) and Mn (II) coexisting with arsenic in underground water. The arsenic removing method comprises the steps of oxidation, micro-flocculation, contact filtration, backwashing water concentration, ferrimanganic particle FeMnOyHy and the like. In addition, an arsenic removing activity filter membrane with arsenic removing activity can be formed on the filter medium surface load of a contact filtration pond and can be used as another barrier for removing arsenic. The method is used for removing arsenic in a drinking water source, treatment water can reach the limit requirements (smaller than 10 mug / L) for arsenic in latest national Standards for Drinking Water Quality (GB5749-2006), and the indexes of ferrum, manganese, turbidity and the like can also reach the national standards. In addition, the method can be also used for removing heavy metals such as copper, chromium, cadmium, lead, antimony and the like and contaminants such as ferrum, manganese and the like in the drinking water source.
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Description

technical field

[0001] The invention relates to a method for treating groundwater containing arsenic, in particular to a method for treating groundwater containing arsenic by utilizing Fe(II) and Mn(II) coexisting with arsenic in the groundwater. Background technique

[0002] Arsenic in natural water mainly exists in two forms: arsenate (As(V)) and arsenite (As(III)). For reducing groundwater, arsenic (III) is the main form. Compared with arsenic (V), arsenic (III) is more toxic, has poorer affinity to soil, sediment and metal oxides, and is more difficult to remove. At present, the relatively mature arsenic removal methods mainly include: sedimentation and co-sedimentation, coagulation, adsorption, ultrafiltration, ion exchange, etc. Among them, the oxidation of As(III) to As(V) is a necessary pretreatment process in most arsenic removal processes. The method for removing arsenic by using a composite oxidation flocculant composed of ferric chloride and potassium permangan...

Claims

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