Red clay phosphorus adsorbent as well as preparation method and application thereof

A technology of red clay and phosphorus adsorbent, applied in the field of phosphorus adsorption materials, can solve the problems of unsuitable crop growth, low crop yield, poor productivity, etc., and achieve the effects of low production cost, wide distribution range and low cost

Pending Publication Date: 2019-12-31
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a land resource, red clay is widely distributed in the tropics and subtropics, but its fertility is poor, the productivity is poor, it is not suitable for crop growth, and the crop yield is low
However, red clay has a relatively high clay content, is rich in oxides such as iron and aluminum, and has a strong ability to adsorb and fix phosphorus. However, there are still few reports on the use of red clay as an adsorbent material and as an adsorbent for phosphorus in polluted water

Method used

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  • Red clay phosphorus adsorbent as well as preparation method and application thereof
  • Red clay phosphorus adsorbent as well as preparation method and application thereof
  • Red clay phosphorus adsorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A preparation method of red clay phosphorus adsorbent, comprising the following process:

[0046] Step 1. Preparation of red clay particles:

[0047] (1) With the southern natural red clay as raw material, the natural red clay is roughly selected, and the red clay with sticky powder particles and iron-aluminum oxide content of 35-45% is selected;

[0048] (2) The red clay obtained by rough selection in step (1) is pulverized with a pulverizer and purified with a magnetic stirrer to separate clay particles with a particle size of 0.5-2 μm; the specific process of purification is to mix the red clay with water according to volume Mix at a ratio of 1:3, stir with a magnetic stirrer, and screen the clay particles with a particle size of 0.5-2 μm in the upper layer;

[0049] (3) The clay obtained in step (2) is dried and crushed until the fineness of the clay is 70 mesh, and the crushed clay is passed through a 100-mesh sieve, and then the sieved clay is put into a thermal re...

Embodiment 2

[0054] A preparation method of red clay phosphorus adsorbent, comprising the following process:

[0055] Step 1. Preparation of red clay particles:

[0056] (1) With the southern natural red clay as raw material, rough selection is carried out to the natural red clay, and the red clay with sticky powder particles and iron-aluminum oxide content of 46%-50% is selected;

[0057] (2) The red clay obtained by rough selection in step (1) is pulverized with a pulverizer and purified with a magnetic stirrer to separate clay particles with a particle size of 0.1-0.5 μm; the specific process of purification is to mix the red clay with water according to Mix with a volume ratio of 1:4, stir with a magnetic stirrer, and screen the clay particles with a particle size of 0.1-0.5 μm in the upper layer;

[0058] (3) The clay obtained in step (2) is dried and crushed until the fineness of the clay is 80 mesh, and the crushed clay is passed through a 100-mesh sieve, and then the sieved clay i...

Embodiment 3

[0063] A preparation method of red clay phosphorus adsorbent, comprising the following process:

[0064] Step 1. Preparation of red clay particles:

[0065] (1) With the southern natural red clay as raw material, the natural red clay is roughly selected, and the red clay with a sticky powder grain and an iron-aluminum oxide content of 51-52% is selected;

[0066] (2) The red clay obtained by rough selection in step (1) is pulverized with a pulverizer and purified with a magnetic stirrer to separate clay particles with a particle size of 0.5-1 μm; the specific process of purification is to mix the red clay with water according to volume Mix at a ratio of 1:5, stir with a magnetic stirrer, and screen the clay particles with a particle size of 0.5-1 μm in the upper layer;

[0067] (3) The clay obtained in step (2) is dried and crushed until the fineness of the clay is 75 mesh, and the crushed clay is passed through a 100-mesh sieve, and then the sieved clay is put into a thermal...

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Abstract

The invention discloses a red clay phosphorus adsorbent which comprises, in parts by weight, 115-145 parts of red clay particles, 20-30 parts of diatomite, 10-15 parts of glass powder and 3-10 parts of marble powder. The preparation process comprises the steps: preparing the red clay particles, weighing the raw materials, crushing, calcining, mixing and the like. The red clay has good phosphorus adsorption performance, and has the advantages of rich resources, wide distribution range and low cost; meanwhile, the red clay is a natural environment-friendly material, and does not cause secondarypollution and other problems after being put into sewage bodies, so that the red clay has great development potential in the aspect of phosphorus adsorption.

Description

technical field [0001] The invention relates to the technical field of phosphorus adsorbing materials, in particular to a red clay phosphorus adsorbent and its preparation method and application. Background technique [0002] In recent years, the eutrophication of water bodies has intensified, which has become a difficult problem in water environment management. Phosphorus is the main factor leading to water eutrophication, therefore, reducing phosphorus discharge is the key to control water eutrophication. Currently, wastewater phosphorus removal methods can be divided into three categories: physical methods, chemical methods and biological methods. Due to the disadvantages of poor treatment effect of physical method and difficult operation of biological method, the practical application is limited. At present, the most widely used method at home and abroad is the chemical phosphorus removal method. Adsorption is a commonly used method for chemical phosphorus removal. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/14B01J20/10B01J20/04C02F1/281C02F2101/20
Inventor 杭小帅王伟张镭尤晓慧朱冬冬丁程成崔益斌陈玉东何斐庄巍晁建颖
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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