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Filler capable of enhancing dechrormization effect of rapid infiltration system and preparation method thereof

A percolation and rapid technology, applied in chemical instruments and methods, sustainable biological treatment, water pollutants, etc., to achieve the effect of prolonging service life, conducive to regeneration and low cost

Inactive Publication Date: 2016-09-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of water environment treatment, the combination of layered bimetallic composite hydroxide and rapid percolation system filler, and its application to the treatment of chromium-containing wastewater has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a filler for improving the chromium removal effect of a rapid percolation system, comprising the steps of:

[0030] 1) Select the washed filler (biological ceramsite commonly used in rapid percolation systems), add 500ml of water (distilled water) per 100g of filler, put the filler and water in a glass container, and add 0.1mol / L at the same time Na 2 CO 3 Solution 10mL;

[0031] The filler is biological ceramsite, the particle size is 5-20mm, and the sphericity is more than 80%.

[0032] 2) According to the ratio of the mass of filler to the number of moles of divalent metal ions and the number of moles of trivalent metal ions is 2Kg: 2mol: 1mol, weigh a divalent metal compound and a kind of trivalent metal compound solids to prepare 0.2mol / L of divalent metal ion solution and 0.1mol / L trivalent metal ion solution, the two solutions are added to the glass container described in step 1) simultaneously, and NaOH solution is continuously added t...

Embodiment 2

[0038] A method for preparing a filler for improving the chromium removal effect of a rapid percolation system, comprising the steps of:

[0039] 1) Select the washed filler (biological ceramsite commonly used in rapid percolation systems), add 500ml of water (distilled water) per 100g of filler, put the filler and water in a glass container, and add 0.1mol / L at the same time Na 2 CO 3 Solution 10mL;

[0040] The filler is biological ceramsite, the particle size is 5-20mm, and the sphericity is more than 80%.

[0041] 2) According to the ratio of the mass of filler to the number of moles of divalent metal ions and the number of moles of trivalent metal ions is 4Kg: 4mol: 2mol, take a divalent metal compound and a kind of trivalent metal compound solids to prepare 0.2mol / L of divalent metal ion solution and 0.1mol / L trivalent metal ion solution, the two solutions are added to the glass container described in step 1) simultaneously, and NaOH solution is continuously added to...

Embodiment 3

[0047] A method for preparing a filler for improving the chromium removal effect of a rapid percolation system, comprising the steps of:

[0048] 1) Select the washed filler (biological ceramsite commonly used in the rapid percolation system), add 500ml of water (distilled water) per 200g of filler, put the filler and water in a glass container, and add 0.1mol / L at the same time Na 2 CO 3 Solution 10mL;

[0049] The filler is biological ceramsite, the particle size is 5-20mm, and the sphericity is more than 80%.

[0050] 2) According to the ratio of the mass of filler to the number of moles of divalent metal ions and the number of moles of trivalent metal ions is 3Kg: 3mol: 1.5mol, weigh a divalent metal compound and a trivalent metal compound solid to prepare 0.4mol respectively / L divalent metal ion solution and 0.2mol / L trivalent metal ion solution, two kinds of solutions are added in the glass container described in step 1) simultaneously, and constantly add NaOH soluti...

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Abstract

The invention belongs to the technical field of heavy metal pollutant purification in water pollution control engineering, and relates to a filler capable of enhancing dechrormization effect of a rapid infiltration system. The invention is characterized in that the filler is prepared from a filler, water, a Na2CO3 solution, a divalent metal ion solution and a trivalent metal ion solution, wherein the ratio of the filler, water and Na2CO3 solution is (100-200)g:500ml:10ml, and the ratio of the mass of the filler, the mole number of divalent metal ions in the divalent metal ion solution and the mole number of trivalent metal ions in the trivalent metal ion solution is (2-4)kg:(2-4)mol:(1-2)mol. The preparation method comprises the following steps: in a hot bath, carrying out coprecipitation reaction on divalent metal compounds and trivalent metal compounds under alkaline conditions to generate a bimetal hydroxide precipitate which is attached to the filler surface in the solution and also generate a laminar bimetal hydroxide film; and carrying out centrifugal separation, drying in a drying oven until the laminar bimetal hydroxide film is fixed to the filler surface, thereby changing the filler surface micropore structure, enhancing the hexavalent chrome adsorption capacity of the filler and having excellent effects on removing hexavalent chrome.

Description

technical field [0001] The invention belongs to the technical field of purification of heavy metal pollutants in water pollution control engineering, and relates to a filler for improving the chromium removal effect of a rapid percolation system and a preparation method thereof. Background technique [0002] Chromium pollution in my country mainly comes from chromium salt factories, chromium slag storage sites, electroplating enterprises and leather tanning enterprises. According to statistics, the country discharges about 600,000 tons of chromium slag every year, but less than 50,000 tons have been properly treated or comprehensively utilized. Due to historical reasons and the imperfection of the existing technology, a lot of chromium-containing wastewater and chromium slag landfill wastewater are directly discharged into rivers, rivers, and lakes without treatment, posing a serious threat to the water environment. At present, chromium has been distributed throughout the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/00C02F101/22
CPCC02F3/00C02F3/105C02F2101/22Y02W10/10
Inventor 张翔凌冷玉洁阮聪颖黄华玲郭露陈巧珍
Owner WUHAN UNIV OF TECH
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