Heavy metal scavenger for synthesizing antimony in printing and dyeing wastewater by resource utilization of high-aluminum sludge in petrochemical industry

A heavy metal scavenger, printing and dyeing wastewater technology, applied in the field of water treatment, can solve the problems of oxidation, unsatisfactory flocculation effect, secondary pollution and so on

Inactive Publication Date: 2019-04-09
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the addition of iron salt will oxidize the membrane of the recycling system, causing secondary pollution
[0005] The patent is [CN201510316237.5] a special flocculant for reverse osmosis membrane reuse of printing and dyeing wastewater synthesized from high-aluminum sludge in the petrochemical industry. By using attapulgite, carbon five can be stabilized, and the stabilized sludge can It is used for flocculation of printing and dyeing wastewater to treat pollutants in printing and dyeing wastewater. Through further tests, it is found that although it can remove organic matter in printing and dyeing wastewater, it has an unsatisfactory flocculation effect on another pollutant in printing and dyeing wastewater: heavy metal antimony

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The specific manufacturing method of the adsorption type macromolecule heavy metal scavenger that present embodiment 1 makes is as follows:

[0039] Step 1. Fully mix the high-aluminum sludge (20-30% of aluminum oxide; 10-50ppm of carbon five; 70-80% of sodium chloride) with powdered activated carbon whose iodine value is greater than or equal to 1200, and the aluminum-containing sludge and activated carbon The mass ratio is 20:1, and the carbon five in the aluminum-containing sludge is fully absorbed by mixing for 30 minutes;

[0040] Step 2, fully mixing polyethyleneimine with a mass concentration of 15% and a sodium hydroxide aqueous solution with a mass concentration of 10% for 30 minutes;

[0041] Step 3. Slowly add carbon disulfide into the solution in step 2 dropwise, control the temperature at 25-30° C., add carbon disulfide in an amount 1.5 times that of polydiethyleneimine, and react for 2 hours after completion. Drying, dehydration, and crystallization to ob...

Embodiment 2

[0045] The specific manufacturing method of the adsorption type macromolecule heavy metal scavenger that present embodiment 2 makes is as follows:

[0046] Step 1. Fully mix the high aluminum-containing sludge with powdered activated carbon whose iodine value is greater than or equal to 1200, the mass ratio of the aluminum-containing sludge to the activated carbon is 15:1, and mix for 30 minutes to fully absorb the carbon five in the aluminum-containing sludge;

[0047] Step 2, fully mixing polyethyleneimine with a mass concentration of 20% and a sodium hydroxide aqueous solution with a mass concentration of 5% for 30 minutes;

[0048] Step 3. Slowly add carbon disulfide into the solution in step 2 dropwise, control the temperature to 30° C., and add carbon disulfide in an amount 1.5 times that of polyethyleneimine, and react for 1.5 hours after completion. Drying, dehydration, and crystallization to obtain a white solid polymer organic sulfur heavy metal scavenger;

[0049] ...

Embodiment 3

[0052] The specific manufacturing method of the adsorption type macromolecule heavy metal scavenger that present embodiment 3 makes is as follows:

[0053]Step 1. Fully mix the high aluminum-containing sludge with powdered activated carbon whose iodine value is greater than or equal to 1200, the mass ratio of the aluminum-containing sludge to the activated carbon is 10:1, and mix for 40 minutes to fully absorb the carbon five in the aluminum-containing sludge;

[0054] Step 2, fully mixing polyethyleneimine with a mass concentration of 18% and alkali with a mass concentration of 8% for 30 minutes;

[0055] Step 3. Slowly add carbon disulfide into the solution in step 2 dropwise, control the temperature at 25-30° C., add carbon disulfide in an amount 1.8 times that of polydiethyleneimine, and react for 1.5 hours after completion. Drying, dehydration, and crystallization to obtain a white solid polymer organic sulfur heavy metal scavenger;

[0056] Step 4. Finally, mix and stir...

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Abstract

The invention provides heavy metal scavenger for synthesizing antimony in printing and dyeing wastewater by resource utilization of high-aluminum sludge in the petrochemical industry. The heavy metalscavenger is characterized by being prepared from a component A, a component B and a component C, wherein the component A comprises high-aluminum sludge and activated carbon, and dosage of the activated carbon is not higher than 20 percent of total weight of the component A; the component B is prepared from the following components in parts by mass: 5-30 parts of polypyrrole and 1-15 parts of an alkaline agent; the component C is organic sulfide; the mass ratio of the component A to the component B is 1:(0.1-10); and the mass ratio of the component C to the polypyrrole is 1.5-2.1. When the pHvalue of the printing and dyeing wastewater is 8-8.5, the heavy metal scavenger can be directly dosed without adjusting the pH value, and the pH value is little changed after treatment, the wastewatercan be drained without callback. The heavy metal scavenger does not contain iron salt, and cannot cause secondary pollution on the membrane system of recycled water.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a heavy metal scavenger for synthesizing and treating antimony in printing and dyeing wastewater by resource utilization of high-aluminum sludge in the petrochemical industry. Background technique [0002] During the production of synthetic resin in the petrochemical industry, a sludge containing a large amount of aluminum oxide (that is, high-aluminum sludge in the petrochemical industry) will be produced. Its main components are 20-30% alumina and 10-50ppm carbon Five, the remaining components are 70%-80% sodium chloride, [0003] Although the concentration of alumina is high, it can be used as a flocculant in theory, but because carbon five has a negative impact on the flocculation of aluminum oxide, at present, petrochemical enterprises in China mainly entrust this type of sludge to qualified This treatment method has caused a lot of waste of resources and environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
CPCC02F1/283C02F2101/10C02F2101/20
Inventor 张金山夏志先
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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