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A preparation method of polymeric cationic heat-activated microporous bimetallic filler

A technology of polymerizing cations and thermal activation, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of low reaction utilization rate, high cost, easy agglomeration, etc., to increase the oxide layer Depth, improve utilization, overcome the effect of easy reunion

Active Publication Date: 2016-05-18
中节能大地环境修复有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the defects of low utilization rate, easy agglomeration, passivation, and high cost of the reaction between zero-valent iron and Cr(VI), and provide a polymeric cationic heat-activated microbe that is novel, efficient, economically feasible, and easy to use. Preparation method of porous bimetallic filler for removing Cr(Ⅵ)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A method for preparing a polymeric cationic heat-activated microporous bimetallic filler, the method comprising the following steps:

[0023] (1) Mix attapulgite into water at a concentration of 0.2~0.6g / mL, after stirring and settling, take the upper suspension for suction filtration and freeze-drying, and take the freeze-dried attapulgite for later use;

[0024] (2) Pretreatment of scrap iron powder: take the scrap iron scrap from the lathe factory, grind it with a ball mill, wash it with hydrochloric acid with a concentration of 0.1~0.5mol / L for 2~5min, then wash it with water until it is neutral, and then put the cleaned scrap iron Put the powder into a freeze dryer to dry, and after the dried iron powder passes through a 200-mesh standard sieve, take the scrap iron powder under the sieve for subsequent use;

[0025](3) Put the activated carbon particles into the crusher for crushing, pass through a 200-mesh standard sieve after crushing, and use the activated carbo...

Embodiment 1

[0034] (1) Mix the attapulgite into water at a concentration of 0.6g / mL, after stirring and settling, take the upper suspension for suction filtration and freeze-drying, and take the freeze-dried attapulgite for later use;

[0035] (2) Take the scrap iron scrap from the lathe factory, grind it with a ball mill, wash it with 0.5mol / L hydrochloric acid for 5 minutes, then wash it with water until neutral, then put the scrap iron powder after cleaning into a freeze dryer to dry for 24 hours, and dry After the iron powder after passing through 200 mesh standard sieves, get the iron powder under the sieve for subsequent use;

[0036] (3) Put the activated carbon particles into the crusher for crushing, pass through a 200-mesh standard sieve after crushing, and use the activated carbon under the sieve for standby;

[0037] (4) Weigh 7.2g of starch and 4.8g of PVA, add to 108ml of water, heat and stir at 100°C for 3 hours, then cool to room temperature (25°C) to obtain 120g of mixed ...

Embodiment 2

[0047] The difference from Example 1 lies in step 8:

[0048] (8) Dissolve 0.59g of copper sulfate pentahydrate in 150g of deionized water to obtain a copper sulfate solution, then take 11g of the heat-activated microporous material from step (7) and dissolve it in the copper sulfate solution, mix and stir for 10 minutes, take out Flaky granules, heat-activated microporous bimetals obtained after freeze-drying for 24 hours;

[0049] The proportioning and manufacturing process of other required materials are the same as in Example 1.

[0050] The polymeric cationic thermally activated microporous bimetallic filler prepared in this example and the filler used for experimental comparison (bimetallic copper plating 0.8%, bimetallic copper plating 15%, polymeric cationic thermally activated microporous bimetallic copper plating 0.8% %) were added to the Cr(Ⅵ)-containing wastewater with an initial concentration of 50mg / L and a volume of 1L. The iron powder content in all the above ...

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Abstract

The invention discloses a method for preparing a polycation thermal activation microporous bimetal filler. According to the method, a polycation thermal activation microporous bimetal filter capable of removing Cr (VI) is prepared by using an inorganic microporous sintered body prepared by attapulgite as the carrier, waste iron powder and copper as the main material and polymeric cation [AlO4Al12(OH)24(OH2)12]7<+> as the modifying agent. The product prepared according to the method has high strength and high permeability, and can be used for solving the problems of low utilization rate, easy agglomeration and passivation during reaction between iron powder and Cr (VI) by fully utilizing the specific surface area of waste iron powder; the filler prepared according to the method has higher property of Cr (VI) removal by about 30 folds compared with the common iron powder, provides technical support for large-scale in-situ remediation of underground water containing Cr (VI), and has good environmental, economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of groundwater Cr(VI) pollution restoration, in particular to a preparation method of polymeric cationic heat-activated microporous bimetallic filler. Background technique [0002] The Cr(VI) pollution of groundwater in my country mainly comes from the chromium salt industry and the electroplating industry. The chromium anhydride used in the electroplating industry comes from the chromium salt industry. About 15% of the products in my country's national economy are related to chromium salt series products. This structural composition leads to the fact that most of the groundwater Cr(VI) pollution in my country comes from the chromium salt industry. The production technology of my country's chromium salt industry is backward and the environment is seriously polluted. By the end of 2013, 62 chromium salt production enterprises had been closed. Only a few of the 13 chromium salt production enterprises in product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/58
CPCB01J20/12B01J20/3064B01J2220/4806C02F1/281C02F1/58
Inventor 张鹤清胡清唐一朱文会高菁阳万德山林斯杰谢丹
Owner 中节能大地环境修复有限公司
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