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Magnetic nano adsorbent for metallurgical wastewater and preparation method of magnetic nano adsorbent

A magnetic nano and adsorbent technology, applied in metallurgical wastewater treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc. The effect of increasing electronegativity

Inactive Publication Date: 2019-10-08
淮北市菲美得环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ferric oxide and nickel oxide composite magnetic nano-adsorbent is used to remove heavy metal ions in metallurgical wastewater and to separate and recover iron filings, iron ore, copper ore and rare metal ores in wastewater. There are no relevant literature and patent records. , so that the application of magnetic nanomaterials is subject to certain restrictions

Method used

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  • Magnetic nano adsorbent for metallurgical wastewater and preparation method of magnetic nano adsorbent
  • Magnetic nano adsorbent for metallurgical wastewater and preparation method of magnetic nano adsorbent

Examples

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preparation example Construction

[0025] The preparation method of the magnetic ferroferric oxide / nickel oxide modified sepiolite specifically comprises the following steps:

[0026] (1) Acid-activated sepiolite: add sepiolite to 5-10% nitric acid at a solid-to-liquid ratio of 0.06-0.1g / ml, and soak for 6-12 hours at 40-80°C. During this acid pickling process, H + Replace Mg in the sepiolite fiber layer 2+ and Al 3+ , to generate cation defect lattice, form a large amount of Si-OH, increase active sites, and at the same time incorporate nitrogen element, further increase electronegativity, improve the adsorption and chelation performance of magnetic nano adsorbents on metal cations and other soluble pollutants, After filtering, washing, drying, and crushing into 100-300μm particles, activated sepiolite is obtained;

[0027] (2) Preparation of magnetic iron ferric oxide / nickel oxide precursor: Dissolve ferric salt and divalent nickel salt in ethylene glycol according to the solid-to-liquid ratio of 0.1-0.3mg / ...

Embodiment 1

[0031] Example 1: Preparation of magnetic ferric oxide / nickel oxide modified sepiolite

[0032] (1) Acid-activated sepiolite: add sepiolite to 7.5% nitric acid at a solid-to-liquid ratio of 0.08g / ml, soak at 60°C for 10 hours, filter, wash, dry, and crush into 200μm particles to obtain activated seafoam stone;

[0033](2) Preparation of magnetic iron ferric oxide / nickel oxide precursor: dissolving ferric nitrate and nickel nitrate in ethylene glycol according to the solid-liquid ratio of 0.2mg / ml and 0.07mg / ml respectively, and then adding anhydrous sodium acetate to make The mass ratio of it to ethylene glycol is 0.1, after uniform dispersion, the precursor solution is obtained;

[0034] (3) Hydrothermal preparation of magnetic ferroferric oxide / nickel oxide modified sepiolite: disperse the activated sepiolite in the precursor solution at a solid-to-liquid ratio of 0.02g / ml, and transfer it to polytetrafluoroethylene after magnetic stirring In an ethylene-lined reactor, con...

Embodiment 2

[0035] Embodiment 2: Preparation of magnetic nanoadsorbent

[0036] With 100 parts of magnetic iron ferric oxide / nickel oxide modified sepiolite obtained in Example 1 and 30 parts of p-tert-butylbenzohydroxamic acid, 18 parts of edetate calcium sodium, 10 parts of ethylenediamine tetramethylene Phosphonic acid, 8 parts of cation exchange resin, and 25 parts of polysilicate ferric sulfate are uniformly mixed, and the obtained composite is the magnetic nano-adsorbent.

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Abstract

The invention discloses a magnetic nano adsorbent for metallurgical wastewater and a preparation method of the magnetic nano adsorbent. The magnetic nano adsorbent is composed of magnetic ferroferricoxide / nickel oxide modified sepiolite, p-tert-butylphenylhydroxamic acid, sodium calcium edetate, ethylene diamine tetramethylene phosphonic aci, cation exchange resin and polymeric ferric silicate sulfate; the magnetic ferroferric oxide / nickel oxide modified sepiolite is prepared by ferric ion, divalent nickel salt, and activated sepiolite which are taken as raw materials in a hydrothermal method; and the preparation method includes the steps of activating sepiolite with nitric acid, preparing magnetic ferroferric oxide / nickel oxide precursor, preparing magnetic ferroferric oxide / nickel oxide modified sepiolite in a hydrothermal method, and preparing the magnetic nano adsorbent. According to the magnetic nano adsorbent, surface activity is high, the specific surface area is large, and non-ionic magnetic conducting components such as iron filings, oxidized ores and rare earth ores in wastewater can be selectively adsorbed while heavy metal ions are removed to avoid resource waste andsecondary pollution.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and also relates to the field of water treatment adsorbents, in particular to a magnetic nano-adsorbent for metallurgical wastewater and a preparation method thereof. Background technique [0002] Metallurgical industrial wastewater refers to the wastewater discharged from the production process of the metallurgical industry. The water quality is complex and changeable, including iron filings, iron ore, copper ore, inorganic salts, and heavy metals such as zinc, chromium, copper, nickel, and lead. Direct discharge not only causes The waste of recyclable resources also causes the accumulation of heavy metals and salts, which has a huge impact on the environment and human survival. At present, the purification methods for metallurgical wastewater mainly include: lime precipitation method, vulcanization method, ion exchange method, reverse osmosis method, and diaphragm electrolysis method. ...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F1/52C02F1/54C02F1/42C02F101/20C02F103/16
CPCB01J20/04B01J20/12B01J20/28009C02F1/281C02F1/285C02F1/5236C02F1/54C02F1/542C02F2001/425C02F2101/20C02F2103/16
Inventor 刘永飞王玉婷戚晓楠
Owner 淮北市菲美得环保科技有限公司
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