A method for separating and removing arsenic by combining iron-manganese composite with superconducting magnetic

A technology of superconducting magnetism and composite oxides, applied in the directions of alkali metal compounds, chemical instruments and methods, water pollutants, etc., to simplify the process, reduce the cost of use, and realize the effect of recycling.

Inactive Publication Date: 2019-06-07
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In summary, there are still many deficiencies in the existing methods for arsenic removal and reuse.

Method used

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  • A method for separating and removing arsenic by combining iron-manganese composite with superconducting magnetic
  • A method for separating and removing arsenic by combining iron-manganese composite with superconducting magnetic
  • A method for separating and removing arsenic by combining iron-manganese composite with superconducting magnetic

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Embodiment 1

[0029] Ferrous salt and potassium permanganate As a raw material, ensure that the total molar concentration of iron and manganese salts is 2.0 mol / L, and prepare iron-manganese composite oxides with a Fe / Mn molar ratio of 3:1. The above-mentioned composite iron-manganese oxide directly passes through a 1000-mesh wet vibrating screen, and the intercepted part is washed and dried to make a powdered iron-manganese composite oxide; the passed part is returned to the material preparation link. Put the powdered iron-manganese composite oxide directly into the arsenic-containing water to be treated, which is mainly trivalent arsenic, which can be stirred with various equipment, such as mixing tanks, pipeline mixers, etc., and can also be mixed using natural water conservancy conditions, such as Dosing in the upstream, using the water flow to mix itself. The iron-manganese composite oxide and arsenic-containing water are fully mixed for 10 minutes to achieve good arsenic removal e...

Embodiment 2

[0032] Rural arsenic pollutes groundwater with an arsenic concentration of 50mg / l, and the main pollutants are trivalent arsenic and pentavalent arsenic. Ferrous salt ferric salt and potassium permanganate As raw material, ensure that the total molar concentration of iron and manganese salts is 3.0mol / L, prepare Fe 2+ / Mn molar ratio is 3:1, Fe 3+An iron-manganese composite oxide with a molar ratio of 4:1 to Mn and a molar ratio of Fe / Mn to 7:1. Separating components with a diameter of more than 10 μm by a cyclone classifier, washing and drying to obtain powder iron-manganese composite oxides. After adding 2g / l of iron-manganese composite oxide with an iron-manganese ratio of 7:1, the arsenic concentration dropped to 0.01mg / l. The magnetic induction intensity of the superconducting magnet is greater than 5T, and the water treatment volume of a single set of superconducting magnetic separator is 600 cubic meters per hour. After the iron-manganese composite oxide adsorbe...

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Abstract

The invention discloses a method for iron-manganese composite oxide combined with superconducting magnetic separation to remove arsenic and reuse, which is characterized in that the iron-manganese composite oxide is obtained by screening or cyclone classification to obtain components with a particle size greater than 10 μm or 20 μm For standby, the components smaller than 10 μm or 20 μm are refluxed to the preparation process for recrystallization; they are directly put into or mixed with natural water conservancy conditions to be treated with arsenic-containing water and stirred, and after fully mixed reaction, the mixed reactant is obtained; the magnetic induction intensity > 3T superconducting magnetic The separator performs rapid solid-liquid separation of the mixed reactants; after the rapid magnetic separation, the non-magnetic liquid phase is directly discharged up to the standard, and the magnetic solid phase enters the alkali activation pool; the mixing of iron-manganese composite oxides and arsenic concentrate in the alkali activation pool The reactant passes through the superconducting magnetic separator again, and the non-magnetic liquid phase is used as arsenic concentrated liquid for recycling, and the magnetic solid phase is the regenerated iron-manganese composite oxide for recycling. It greatly simplifies the process of its industrial application and greatly reduces its use cost.

Description

technical field [0001] The invention belongs to the technical field of arsenic extraction, and relates to a method for removing arsenic and reusing iron-manganese compound combined with superconducting magnetic separation. Background technique [0002] Trivalent arsenic and pentavalent arsenic are the main components of inorganic arsenic, which often exist together in the water environment. Arsenic in water is an important environmental pollutant, especially when drinking water contains arsenic, it can cause a variety of muscle, bone, and nervous system diseases, and it is more carcinogenic, teratogenic, and mutagenic. The control technology of arsenic pollution in water has been widely concerned by academic and engineering circles for a long time. [0003] Iron-manganese composites have been reported in the literature from 2005 to 2010. It is an excellent inorganic arsenic treatment material. The introduction of manganese can significantly improve the treatment effect of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F1/48C22B7/00C22B30/04C02F101/10
CPCB01J20/06B01J20/28009C02F1/281C02F1/288C02F1/482C02F2101/103C22B7/005C22B30/04Y02P10/20
Inventor 孙占学李亦然王学刚李志勇蒋浩
Owner EAST CHINA UNIV OF TECH
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