Method for preparing absorbent with phosphor concentration and phosphor reclaim function

A phosphorus recovery and adsorbent technology, which is applied in the fields of adsorbed water/sewage treatment, inorganic chemistry, non-metallic elements, etc., can solve the problems of inability to meet the phosphate fertilizer standard, disadvantage of production cost, harmful to human body, etc., and achieve obvious price advantage and low cost. , a significant effect

Inactive Publication Date: 2006-05-03
SHANGHAI JIAO TONG UNIV
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated alumina is currently the most reported phosphorus adsorption material. The adsorption capacity of this material for phosphorus is only 10 grams of phosphorus per kilogram of adsorbent, that is, the phosphorus content in the product is about 1%, which cannot meet the standard of phosphate fertilizer.
Other phosphorus adsorption materials such as the hydrated lanthanum oxide reported in the document "Experimental Research on Hydrated Lanthanum Oxide Adsorption and Phosphorus Removal" (Enviro

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In parts by weight, the raw materials are 100 parts of slaked lime and 80 parts of silicon dioxide. After the two are evenly mixed, 100 parts of water and 1 part by weight of a 1% sodium hydroxide solution are added. After standing for activation for 1 hour, the The mixture was put into a hydrothermal reactor and heated to 120° C., and synthesized under a pressure of 10 MPa for 3 hours. The material after hydrothermal synthesis is taken out and cooled and dried. Finally, the material is ground into a powdered adsorbent.

[0022] Phosphorus recovery experiments were carried out using the phosphorus adsorbent prepared by the above process. The sewage is taken from the sludge thickening tank of Shanghai Xinzhuang Water Purification Plant, the raw water phosphate concentration is 25mg / L, and the pH is 7.1. Take 3 grams of phosphorus adsorbent and put it into 10L of the domestic sewage, stir constantly, let it stand for precipitation for 10 minutes after adsorption for 8 h...

Embodiment 2

[0024] In parts by weight, the raw materials are 100 parts of quicklime and 120 parts of sodium silicate. After mixing the two evenly, add 200 parts of water and 2 parts by weight of a 1% calcium hydroxide solution, and leave it to activate for 2 hours. The mixture was put into a hydrothermal reactor and the temperature was raised to 140° C., and synthesized under the condition of a pressure of 12 MPa, and the synthesis time was 5 hours. The material after hydrothermal synthesis is taken out and cooled and dried. Finally, the material is ground into a powdered adsorbent.

[0025] Phosphorus recovery experiments were carried out using the phosphorus adsorbent prepared by the above process. The sewage is taken from the sludge thickening tank of Shanghai Xinzhuang Water Purification Plant, the raw water phosphate concentration is 25mg / L, and the pH is 7.1. Take 2 grams of phosphorus adsorbent and put it into 10L of the domestic sewage, stir constantly, let it stand for 10 minut...

Embodiment 3

[0027] In parts by weight, the raw materials are 100 parts of oyster shells and 150 parts of silica. After mixing the two evenly, add 300 parts of water and 4 parts of 1% sodium hydroxide solution by weight, and leave the mixture for 3 hours to activate. Put it into a hydrothermal reaction kettle and raise the temperature to 160°C, and synthesize under the condition of a pressure of 17Mpa, and the synthesis time is 6 hours. The material after hydrothermal synthesis is taken out and cooled and dried. Finally, the material is ground into a powdered adsorbent.

[0028] Phosphorus recovery experiments were carried out using the phosphorus adsorbent prepared by the above process. The sewage is taken from the sludge thickening tank of Shanghai Xinzhuang Water Purification Plant, the raw water phosphate concentration is 25mg / L, and the pH is 7.1. Take 2 grams of phosphorus adsorbent and put it into 10L of the domestic sewage, stir constantly, let it stand for 10 minutes to settle a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Disclosed a method for preparing the adsorbent with the phosphor collection and recycle functions, utilizes the natural mineral as raw material to mix the calcium material in 100 weight and the silicon material in 80-200 weight uniformly, then adds the water and synthetic adjuvant as natrium hydrate or calcium hydrate solution to be laid for activation, puts it into water heat reaction kettle to for heated and pressurized synthesis while the synthesis temperature is 120-280 Deg. C and the synthesis pressure is 10-40mpa and the synthesis time is 3-24 times; then cools and dries the material after aforementioned process to be milled or processed into grains which is said high effective absorbent with the phosphor collection and recycle functions. Wherein, said calcium material can be selected from lime hydrate, burnt lime and conch; said silicon material can be selected from silica dioxide, sodium silicate, ganister, bermehl and rice husk ash, which have wide resource and lower cost. The prepared absorbent has the characters that large process handling capacity of unit weight phosphor, lower producing cost, and realization of absorbing and recycling phosphor.

Description

technical field [0001] The present invention relates to a preparation method of an adsorbent with functions of phosphorus enrichment and phosphorus recovery, in particular to a kind of adsorbent with functions of phosphorus enrichment and phosphorus recovery synthesized by hydrothermal reaction using quicklime, silica and other inorganic substances as raw materials. The invention discloses a preparation method of a high-efficiency adsorbent, which belongs to the technical field of water treatment. Background technique [0002] In recent years, the eutrophication of lakes and rivers caused by excessive nutrients such as nitrogen and phosphorus in water bodies has become a major environmental problem facing our country. Scientific research shows that when the total phosphorus content in slow-flowing water bodies such as lakes and reservoirs exceeds 0.02 mg / L, blue-green algae blooms may break out, resulting in a decrease in dissolved oxygen in the water body, black and odorous...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/10C02F1/28
Inventor 陈雪初孔海南吴德意王欣泽
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap