Method for removing dye in water by using sludge of water supply plant

A technology for sludge and water removal in water supply plants, which is applied in the field of environmental pollution and treatment, and achieves the effects of high adsorption efficiency, low cost, and increased specific surface area.

Inactive Publication Date: 2016-11-09
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for removing dye in water by using sludge of water supply plant
  • Method for removing dye in water by using sludge of water supply plant

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Embodiment 1

[0019] Such as figure 1 As shown, the dehydrated aluminum sludge from the water supply plant was selected, air-dried under natural conditions, and ground to obtain particles of 1-200 μm. Add 5g / L of aluminum sludge or activated aluminum sludge to 20ml of dye-containing water to be treated (congo red concentration 50mg / L), adjust the pH to 6.0, control the reaction time on a magnetic stirrer to 60min, and filter , The absorbance of the filtrate was measured with a spectrophotometer, and then the dye removal rate of the wastewater was calculated.

[0020] After testing, the dye concentration in the water before the treatment in this embodiment was 50 mg / L, and the dye concentration in the water after the treatment in this embodiment dropped to 0.5 mg / L and 0.1 mg / L respectively, and the removal rate of the dye reached 99% and 99.8 %. It can be seen that this embodiment uses aluminum sludge or activated aluminum sludge as an adsorbent to remove anionic dyes, with high removal e...

Embodiment 2

[0022] Such as figure 2 As shown, the dehydrated aluminum sludge from the water supply plant was selected, air-dried under natural conditions, and ground to obtain particles of 1-200 μm. Calcined in a muffle furnace at 300°C for 2h to obtain activated aluminum sludge. Add 5g / L of aluminum sludge or activated aluminum sludge to 20ml of dye-containing water to be treated (methylene blue concentration 50mg / L), adjust the pH to 8.0, control the reaction time on a magnetic stirrer to 60min, and filter the filtrate with The absorbance is measured by the spectrophotometer, and then the dye removal rate of the wastewater is calculated.

[0023] After testing, the dye concentration in the water before the treatment of this embodiment was 50 mg / L, and the dye concentration in the water after the treatment of this embodiment dropped to 1.0 mg / L and 0.5 mg / L respectively, and the removal rate of the dye reached 98% and 99%. %. It can be seen that this embodiment uses aluminum sludge o...

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Abstract

The invention discloses a method for removing dyes in water by using sludge of a water supply plant. The method comprises the following steps: drying aluminum sludge, iron sludge or aluminum/iron sludge in air, grinding to 1-200mu m, and calcining the sludge for 1-4 hours at 300-400 DEG C so as to obtain activated sludge; feeding the activated sludge and original sludge into dye wastewater respectively according to properties and characteristics of different dyes, retaining for 20-60 minutes, and filtering off the wastewater, thereby obtaining water of which the dyes are removed. The method is free of secondary pollution, simple to operate and feasible and efficient, and due to the idea that waste is treated by using waste, the cost of industrial dye wastewater treatment is lowered.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution and treatment, relates to water treatment technology, in particular to a method for removing dyes in water. Background technique [0002] my country's water supply plants produce a large amount of muddy water every year, and its water volume accounts for about 4-7% of the total clean water of the water supply plant. Most of these muddy water are directly discharged into nearby rivers, lakes and other water bodies. Since the mud discharge water contains a large amount of suspended solids, it will have a certain impact on the water body, such as reducing the volume of the water body and reducing the incidence of sunlight. In addition, the sludge discharge water is rich in aluminum or iron salts, and a large amount of metal salts are discharged into natural water bodies, which can also lead to natural water body pollution and salinization of surrounding soil. [0003] In recent years...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/30C02F1/28
CPCY02W10/37B01J20/0225B01J20/0248B01J2220/4887C02F1/281C02F2101/38C02F2103/30
Inventor 秦庆东许妍
Owner SOUTHEAST UNIV
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