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Phosphorus removal adsorbent as well as preparation method and application thereof

A phosphorus adsorbent and adsorbent technology, applied in the field of phosphorus removal adsorbent and its preparation, can solve the problems of restricting the wide application of modified materials, complicated material operation, high cost, etc., and achieve resource utilization, high phosphorus removal efficiency, and method simple effect

Active Publication Date: 2021-06-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While currently using chemical reagents (La 3+ 、Al 3+ , Fe 3+ , Mg 2+ , Ca 2+ ) Modified and synthesized materials are complex in operation and high in cost, which limits the wide application of modified materials in practice

Method used

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  • Phosphorus removal adsorbent as well as preparation method and application thereof
  • Phosphorus removal adsorbent as well as preparation method and application thereof
  • Phosphorus removal adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ① Dry the remaining sludge from the sewage treatment plant at 105°C for 24 hours. The dried sludge is crushed through a 0.1mm sieve with a pulverizer; the limestone is washed three times with deionized water, and after drying, it is pulverized through a 0.1mm sieve with a pulverizer.

[0036] ② Mix the screened waste limestone and sludge according to the ratio of limestone to sludge dry weight of 3:1, put them into a quartz boat, and heat from room temperature at a rate of 10°C / min in a programmable tube furnace OTF-1200X to 800°C, and at 800°C N 2 Keep it under the atmosphere for 2 hours, and then wait for the powder to cool to room temperature, wash the obtained powder with deionized water to remove the residue on the surface, then place the powder in an oven at 95°C to dry, and after drying, grind it through a 0.1mm sieve. Save for later.

Embodiment 2

[0038] Compared with Example 1, the heating temperature in the tube furnace was 700°C.

Embodiment 3

[0040] Compared with Example 1, the heating temperature in the tube furnace was 600°C.

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Abstract

The invention relates to a phosphorus removal adsorbent as well as a preparation method and application thereof. The raw materials of the phosphorus removal adsorbent are waste limestone and sludge, the waste limestone is building stone, the waste stone generated in the mining production process is used, and the sludge is a material generated in the sewage treatment process. The preparation method comprises the following steps: mixing the waste limestone with the sludge, and carrying out heating treatment in a tubular furnace. The purpose of effectively removing phosphate in water is achieved by using the waste limestone modified biochar. The phosphate-adsorbed material can be used as a soil conditioner, can be used as a slow-release phosphate fertilizer to promote plant growth, and can also be used as a passivator to repair soil polluted by heavy metals such as Cd and the like.

Description

technical field [0001] The invention belongs to the technical field of phosphorus removal from sewage, and in particular relates to an adsorbent for phosphorus removal and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Biological, chemical, and adsorption methods have been widely used in water body phosphorus removal. However, chemical precipitation and other methods require high input costs and expensive maintenance costs. Biological treatment is greatly affected by external factors such as carbon sources and water quality, and is not easy to control. Adsorption has attracted the attention of many researchers due to its advantages...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/043C02F1/281C02F2101/105
Inventor 王海霞张明亮薛俊冰杨洁吕琦
Owner UNIV OF JINAN
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