Composite adsorbent based on water purification sludge and powdered activated carbon and its preparation method and application

A powder activated carbon, composite adsorption technology, applied in water/sludge/sewage treatment, water pollutants, water/sewage treatment and other directions, can solve the problems of complex preparation process, poor adsorption effect, etc., to improve ammonia nitrogen removal efficiency, The effect of increasing the average adsorption pore size

Active Publication Date: 2022-06-21
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing various adsorbents have complex preparation processes, such as the need for multiple modifiers, multiple preparation steps, and poor adsorption effects.

Method used

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  • Composite adsorbent based on water purification sludge and powdered activated carbon and its preparation method and application
  • Composite adsorbent based on water purification sludge and powdered activated carbon and its preparation method and application
  • Composite adsorbent based on water purification sludge and powdered activated carbon and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0020] Based on the composite adsorbent of water purification sludge and powdered activated carbon, the specific production steps are as follows:

[0021] The purified water sludge retrieved from the water plant in Suzhou High-tech Zone was put into a blast drying oven and dried at a temperature of 100°C for 24 hours, and then pulverized to 100-140 mesh in a pulverizer to obtain pulverized purified water sludge. Take pulverized water purification sludge and powdered activated carbon with a mass ratio of 9:1 (purchased from Sinopharm Chemical Reagent Co., Ltd., the specific surface is about 900 m 2 / g, the particle size is 110 mesh to 120 mesh) for mixing, add 50 ml of distilled water, stir evenly, and use a granulator to extrude a cylinder with a diameter of 3 mm (the diameter and height of the cross-sectional circle of the cylinder are not limited), which is a shaped body . The extruded molded body was air-dried under natural conditions, then placed in a blast drying oven fo...

Embodiment 2

[0028] The composite adsorbent based on water purification sludge and powdered activated carbon has a good removal effect of ammonia nitrogen in water. Ammonia nitrogen wastewater was simulated with ammonium chloride aqueous solution, and ammonium chloride was of analytical grade. Add adsorbents of different masses (0.5g, 1g, 1.5g, 2g, 3g, 5g) into the conical flask, add 50mL of 50mg / L ammonia nitrogen wastewater, shake for 2 hours, the shaking temperature is 25 ℃, and the shaking rate is 120r / min. After the adsorption was completed, samples were taken from the conical flask for centrifugation, and the ammonia nitrogen concentration was measured. The effect of the dosage of raw mud adsorbent and composite adsorbent on the removal of ammonia nitrogen is as follows: image 3 shown.

[0029] from image 3 It can be seen that the adsorption capacity of the composite adsorbent is higher than that of the original mud under the same dosage. With the increase of adsorbent dosage,...

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Abstract

The invention discloses a composite adsorbent based on water purification sludge and powdered activated carbon as well as its preparation method and application. The water purification sludge and powdered activated carbon are mixed in a certain proportion and calcined at high temperature to prepare the adsorbent. The specific method is as follows: The water purification sludge is dried and crushed, and then mixed with powdered activated carbon at a mass ratio of 9:1. The uniformly mixed water purification sludge and powdered activated carbon are extruded with a granulator, dried at 100°C, and then Calcined at 500°C for 3 hours in a muffle furnace to make an adsorbent. The addition of powdered activated carbon can increase the average adsorption pore size of the water purification sludge, which is conducive to the full use of the internal active sites of the composite adsorbent for ammonia nitrogen, thereby improving the adsorption capacity of the water purification sludge to pollutants, and using the prepared adsorbent to remove the pollutants in the water body. Ammonia nitrogen has a good removal effect.

Description

technical field [0001] The invention relates to a preparation method and application of a water purification sludge and powder activated carbon composite adsorbent, in particular to the preparation method of the composite adsorbent and the research on using the composite adsorbent to remove ammonia nitrogen in water, which can realize the resource utilization of water purification sludge . Background technique [0002] With the increase of population and the development of industry, the demand for water is increasing, and more and more water purification sludge is produced in the process of water treatment by water plants. Improper treatment of water purification sludge can cause secondary environmental problems such as greenhouse gas emissions, groundwater and land pollution, so it needs to be properly disposed of. How to turn waste into treasure has become the focus of people's attention, so they began to seek the resource utilization of water purification sludge. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/16
CPCB01J20/20B01J20/28059B01J20/28083B01J20/3007B01J20/3078C02F1/288B01J2220/42B01J2220/4887C02F2101/16
Inventor 王东田李荣魏杰张钱丽
Owner SUZHOU UNIV OF SCI & TECH
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