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Modified iron tailing sand, preparation and application of sand

A technology of iron tailings sand and modification, applied in other chemical processes, water/sludge/sewage treatment, water pollutants, etc., can solve the problem that the adsorption performance needs to be optimized, so as to solve the problem of reuse and environmental pollution, adsorption performance Stable, easy-to-use effects

Pending Publication Date: 2019-04-23
BIOLOGY INST OF HEBEI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After a lot of experiments, it was found that iron tailings sand has adsorption capacity for heavy metal ions such as copper, lead, chromium, cadmium, lead, etc., but the adsorption performance needs to be optimized

Method used

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  • Modified iron tailing sand, preparation and application of sand
  • Modified iron tailing sand, preparation and application of sand
  • Modified iron tailing sand, preparation and application of sand

Examples

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preparation example Construction

[0049] A kind of preparation of modified iron tailing sand, comprises the following steps:

[0050] Step 1, pass the dried antibiotic bacteria residue or biogas residue and iron tailings through a 40-80 mesh sieve respectively, and set aside;

[0051] Step 2, in parts by weight, uniformly mix 2-5 parts of antibiotic bacteria residue or biogas residue after sieving with 3-8 parts of iron tailings sand to prepare mixture I;

[0052] Step 3. Pyrolysis and carbonization of the mixture I under anaerobic conditions. During the pyrolysis and carbonization process, the temperature is raised to 300-700°C at a rate of 8-10°C / min, and then heat-preserved and pyrolyzed for 1-4h to obtain a modified iron tailings; and

[0053] Step 4, repeatedly washing the modified iron tailings with water until the pH value is neutral, then drying, crushing, and passing through a 40-80 mesh sieve to obtain neutral modified iron tailings;

[0054] Wherein, the drying temperature in the step 1 and the st...

Embodiment 1

[0063] A modified iron tailing sand, which is obtained by mixing and modifying the following raw materials in parts by weight: 2 parts of antibiotic slag or biogas residue and 3 parts of iron tailings, wherein the biogas residue is antibiotic slag The solid part obtained after solid-liquid separation of oxygen fermentation residue.

Embodiment 2

[0065] A modified iron tailing sand, which is obtained by mixing and modifying the following raw materials in parts by weight: 3 parts of antibiotic slag or biogas residue and 5 parts of iron tailing sand, wherein the biogas residue is antibiotic slag The solid part obtained after solid-liquid separation of oxygen fermentation residue.

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Abstract

The invention discloses modified iron tailing sand which is prepared by mixing and then modifying raw materials including, by weight, 2-5 parts of antibiotic mushroom dregs or biogas residues and 3-8parts of iron tailing sand. The modified iron tailing sand is stable in adsorption performance and less affected by pH (potential of hydrogen) values and temperature. Compared with unmodified iron tailing sand, the modified iron tailing sand has the advantages that heavy metal ion and phosphorus adsorption performance is greatly improved, and waste can be turned into wealth while antibiotic residues in the antibiotic mushroom dregs are removed. The invention further provides preparation of the modified iron tailing sand and an application of the modified iron tailing sand. In order to acquirethe modified iron tailing sand with excellent performance and high porosity and without antibiotic residues, a proper preparation process is provided. By the aid of procedures such as granulation, themodified iron tailing sand is further applicable to river sediment pollution control, and the decontamination effect of the modified iron tailing sand is further improved.

Description

technical field [0001] The invention relates to the technical field of resources and environmental protection, in particular to a modified iron tailings sand, its preparation and its application. Background technique [0002] At present, with the rapid development of industry and agriculture, people pay more and more attention to the problem of heavy metal pollution. The "Water Pollution Prevention and Control Action Plan" issued by the state, namely the "Water Ten Measures", emphasizes the heavy metal pollution in the water environment and its prevention and control. Heavy metal wastewater treatment methods mainly include chemical precipitation, electrolysis, ion exchange, adsorption, biological treatment and membrane separation. Adsorption is widely used in wastewater treatment because of its simplicity and high efficiency. However, traditional adsorbents such as activated carbon and ion exchange resins are expensive and difficult to regenerate. The research on cheap and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/06B01J20/08B01J20/103B01J20/12C02F1/281C02F2101/20B01J2220/4887
Inventor 程辉彩方楠何强张丽萍吴健刘华娇刘媛媛崔冠慧刘洪伟张飞燕王雅娜习彦花
Owner BIOLOGY INST OF HEBEI ACAD OF SCI
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