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Special efficient coagulant for strongly-acidic antimony-containing wastewater

A strong acid and coagulant technology, applied in water pollutants, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of complicated operation and high treatment cost, and achieve simple storage conditions, The effect of long storage time and fast precipitation

Inactive Publication Date: 2020-04-10
湖南中车环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems in the prior art that the coagulation method needs to pre-adjust the pH value to between 4 and 10, resulting in high treatment cost and complicated operation, the present invention provides a kind of special-purpose strong acid antimony solution to solve the above problems. High-efficiency coagulant for antimony-containing wastewater

Method used

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  • Special efficient coagulant for strongly-acidic antimony-containing wastewater
  • Special efficient coagulant for strongly-acidic antimony-containing wastewater
  • Special efficient coagulant for strongly-acidic antimony-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the high-efficiency coagulant specially used for strongly acidic antimony-containing wastewater is as follows:

[0024] Step 1: Take a 250mL three-necked flask, add 100mL of absolute ethanol, 20mL of ultrapure water, and 1.5mL of ammonia water in sequence, then place the three-necked flask in a constant temperature water bath at 30°C, connect it to a mechanical stirrer, and keep Stir the mixed solution in the three-neck flask for 10 min at a low speed (100 r / min), so that absolute ethanol, ultrapure water, and ammonia water are mixed evenly.

[0025] Step 2: After stirring, adjust to high speed (1000r / min), pipette 4mL orthoethyl silicate (TEOS) dropwise into the three-necked flask, and feed nitrogen (N 2 ) for 30min, and then adjusted to medium speed (600r / min) to stir the mixed solution in the three-necked flask for 20h.

[0026] Step 3: After the stirring, the mixture in the three-necked flask was subjected to low-temperature centrifugation...

Embodiment 2

[0032] In the high-efficiency coagulant specially used in strongly acidic antimony-containing wastewater provided by the invention, sodium bicarbonate (NaHCO 3 ), hydrogen peroxide (H 2 o 2 ), the addition of glutaraldehyde will affect the performance of removing antimony ions. The experiment to determine the addition amount employed in Example 1 is as follows.

[0033] Prepare a strongly acidic (pH=1-3) water sample containing antimony with a concentration of 10mg / L. Measure 200mL each time and add it to a 250mL beaker. Six beakers form a group, and three groups of beakers are used as a single factor experiment. 20, 40, and 60 mg of the high-efficiency coagulant (TGSSG) specially used for strongly acidic antimony-containing wastewater were added to three groups of beakers in each single factor experiment.

[0034] The coagulation is divided into three stages: stirring at a stirring speed of 300r / min for 5min; stirring at a stirring speed of 100r / min for 10min; separation a...

Embodiment 3

[0043] In order to prove the advantages of the high-efficiency coagulant (TGSSG) specially used for strongly acidic antimony-containing wastewater in the treatment of strongly acidic antimony-containing wastewater, it was compared with existing conventional coagulants (ferric chloride, polyferric sulfate, polyaluminum sulfate), magnetic coagulant (magnetic chitosan), and in strongly acidic (pH=1-3 range) antimony-containing water samples, the removal ability of antimony ions was compared. The initial concentration of antimony ions is 10mg / L. The results are shown in Table 4.

[0044]

[0045] Table 4

[0046] Obviously, compared with existing conventional coagulant (ferric chloride, polyferric sulfate, polyaluminum sulfate), magnetic coagulant (magnetic chitosan), the high-efficiency coagulation that is specially used in strongly acidic antimony-containing wastewater TGSSG has greatly improved the removal effect of antimony ions in strongly acidic (pH=1-3) antimony-contai...

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Abstract

The invention provides a special efficient coagulant for strongly-acidic antimony-containing wastewater. The special efficient coagulant for the strongly-acidic antimony-containing wastewater is prepared by taking tetraethyl orthosilicate (TEOS) and reduced glutathione (GSH) as raw materials, sodium bicarbonate (NaHCO3) and hydrogen peroxide (H2O2) as activating agents and glutaraldehyde as a cross-linking agent. The special efficient coagulant provided by the invention solves the technical problems of high treatment cost and complex operation due to the fact that a pH value needs to be adjusted to 4-10 in advance when the antimony-containing wastewater is treated by using a coagulation method in the prior art.

Description

technical field [0001] The invention relates to the field of heavy metal coagulants, in particular to a high-efficiency coagulant specially used for strongly acidic antimony-containing wastewater. Background technique [0002] my country is a big country with antimony reserves, output and export volume in the world. Antimony ore mining, mineral processing and smelting have brought about the problem of antimony pollution to the environment. In addition, with the rapid development of industries such as alloys and semiconductor materials, flame retardants, ceramics, and printing and dyeing in China, the demand for antimony and its compounds is increasing, which also causes a large amount of antimony-containing pollutants to be discharged, further aggravating antimony pollution. risks and hazards to the environment. Antimony and its compounds are highly toxic to the human body and environmental organisms, and may even have potential carcinogenic risks to the human body. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F101/20
CPCC02F1/54C02F2101/20
Inventor 王雨露陈小奇张玉红陈来福杨振兴
Owner 湖南中车环境工程有限公司
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