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Novel reclamation method of electroplating sludge

A technology for electroplating sludge and recycling, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex reaction conditions, high energy consumption, secondary pollution, etc. High efficiency, high stability, convenient recovery and separation

Inactive Publication Date: 2012-10-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the recycling of electroplating sludge has been achieved by this method, the operating conditions require a high-pressure reactor with a temperature of 200°C. The reaction conditions are relatively complicated and the energy consumption is high. Can dissolve, easily cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.

[0025] Preparation of porous loaded ferrite magnets:

[0026] (1) chopping the bulk solid of heavy metal sludge with machinery, the sludge of agglomerate is cut into small particles, and the measured average particle diameter is 5mm;

[0027] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:4, add 400 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;

[0028] (3) Add 1.13mol FeSO to the mu...

Embodiment 2

[0033] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.

[0034] Preparation of porous loaded ferrite magnets:

[0035](1) chopping the bulk solid of heavy metal sludge with machinery, the sludge of agglomerate is cut into small particles, and the measured average particle diameter is 5mm;

[0036] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:5, add 500 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;

[0037] (3) Add 1.575mol FeSO to the mu...

Embodiment 3

[0042] Preparation of activated rice husk: agricultural waste rice husk is soaked in sodium hydroxide with a mass concentration of 2.5%, boiled for 15 minutes, filtered out, washed with water until neutral, and dried at 60°C.

[0043] Preparation of porous loaded ferrite magnets:

[0044] (1) chop the bulk solid of heavy metal sludge with machinery, cut the sludge of agglomerate into small particles, and record an average particle diameter of 9 mm;

[0045] (2) Take 100g of electroplating sludge from Wuxi Hazardous Waste Treatment Center. The sludge parameters are: moisture content 70.0%, main metal element composition: Cr 6.62%, Fe 4.35%, Ni 6.54%, Cu 16.88%, Zn 4.56%, Converted into moles, Fe(II) is 0.078mol, Cr(III) is 0.127mol, and other divalent metals are 0.445mol. According to the heavy metal-containing sludge and water mass ratio of 1:6, add 600 g of water to the reactor, stir for 30 minutes, and form a uniform slurry;

[0046] (3) Add 2.02mol FeSO to the mud formed ...

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Abstract

The invention relates to a novel reclamation method of electroplating sludge, belonging to the technical field of chemical and environmental science. The method takes the electroplating sludge as raw material, right amount of iron source is supplemented into the raw material, agricultural waste rice hulls treated by activating are added into the raw material, the reclamation for the electroplating sludge can be realized under the conditions of mild water heat, ventilation and proper alkaline condition, and porous loaded type ferrite new material is obtained. The novel reclamation method is energy-saving and high in efficiency, and can realize regenerating cyclic utilization of solid waste; the obtained porous loaded type ferrite new material is high in stability, difficult in dissolution of heavy metal ions and free from secondary pollution, and can be used for efficiently removing mercury ion in water; furthermore, the porous loaded type ferrite new material has good magnetism, thus being convenient to recover, separate and recycle, and achieving the aim of controlling waste by waste. The process route is high in efficiency, simple, mild and low in energy consumption, and does not easily generate secondary pollution; and the needed device is simple, convenient to operate, easy in control of conditions and low in production cost.

Description

Technical field: [0001] A new recycling method for electroplating sludge. The invention relates to a treatment and utilization method for solid waste of electroplating sludge. Through low-temperature mineralization treatment, the sludge containing heavy metals is turned into a ferrite magnet to prepare a porous loaded composite ferrite magnet. , can be used for the removal of mercury ions in water, to achieve the goal of treating waste with waste and achieving zero waste. The invention relates to the field of chemistry and environmental science and technology, in particular to the field of resource utilization of electroplating sludge containing heavy metals. Background technique: [0002] With the development of modern industry, the amount of heavy metal sludge has increased dramatically. Heavy metal sludge mainly comes from electroplating industry, metal surface treatment industry, printed circuit board industry, etc. These industries produce a large amount of wastewater ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F103/16
Inventor 顾文秀李磊邹路易吴婷婷李博
Owner JIANGNAN UNIV
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