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Method for high-efficiently and conveniently treating non-point source pollution using ferric oxide nano material

An iron oxide nanometer and nanomaterial technology, applied in the field of environmental pollution control, can solve the problems of no treatment technology and method, blockage of infiltration channels, uneconomical treatment facilities, etc.

Inactive Publication Date: 2009-03-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has high construction costs and is prone to blockage of the infiltration channel
[0004] Due to the uncertainty of time and space distribution, occurrence time and quantity of non-point source pollution, it is obviously uneconomical to use the above technologies to build special treatment facilities for them, and it will take a lot of time and occupy a certain amount of land resources, and these technologies are mainly aimed at Loss of nutrients in surface runoff, however, nutrients that permeate below the surface can end up in lakes, rivers and reservoirs as well as pesolation (runoff in the soil)
For the loss of nutrients in the soil, there is currently no effective treatment technology and method

Method used

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  • Method for high-efficiently and conveniently treating non-point source pollution using ferric oxide nano material
  • Method for high-efficiently and conveniently treating non-point source pollution using ferric oxide nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Preparation of nano-iron material

[0018] Take 100ml, 1g / l FeCl 2 4H 2 Aqueous O solution (calculated as Fe) was added dropwise to 100ml, 0.12% (W / V) dispersant solution, and continued shaking for 30 minutes to make Fe 2+ Completely complexes with dispersants. Then add 0.1 mol / l NaOH solution dropwise to the solution, stop adding when the pH value of the solution reaches 11, and continue shaking for 1 hour to obtain the nanomaterial of the present invention.

Embodiment 2

[0019] Embodiment 2. The permeability comparison of nano-iron material and ordinary iron material in soil

[0020] Take 6g of soil sample and put it into a glass tube, and the height of the soil column is 10cm. Inject 15ml each of ordinary iron suspension and nano-iron suspension into the glass tube, with a concentration of 100mg / l (calculated as Fe). Collect every 1ml overflow that flows through the soil column, and measure the concentration of iron. See figure 1 .

Embodiment 3

[0021] Embodiment 3. Effect comparison of phosphorus fixation before and after soil modification

[0022] Take 0.5mg / L nano-iron suspension and mix it with 6g original soil, then put it into a glass tube, then take 6g of original soil and put it into another glass tube as a control, then put 10ml, 0.5mg / l The phosphorus solution is added to the top of the soil column in the glass tube, and after a period of time, the overflow liquid flowing through the soil column is collected to measure the phosphorus concentration. See figure 2 .

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Abstract

The invention relates to a method utilizing a ferric oxide nano material to efficiently and conveniently treat non-point source pollution, in particular to a method taking a non-toxic and cheap high molecular polymer easy for biodegradation and common ferric salt as raw materials to prepare a nano ferro material with a simple and convenient synthesis technique. The material penetrates and disperses into the subsurface stratum of earth, thus forming an in-earth wall containing the ferric oxide nano material; phosphor in phosphorus water flowing through the in-earth wall is adsorbed so as to treat phosphorin non-point source pollution caused by excessive use of chemical fertilizers and pesticides, discharge of human and animal fecaluria and domestic sewage, and the like, and is characterized by high efficiency, convenience, wide application range, etc. The method pertains to the field of environmental pollution control.

Description

technical field [0001] The invention relates to a method for efficiently and conveniently treating non-point source pollution by using iron oxide nanomaterials. Specifically, it is a method for preparing nano-iron materials by using non-toxic, easily biodegradable and cheap high molecular polymers and common iron salts as raw materials through a simple synthesis technique. This material can be infiltrated and dispersed in the sub-surface layer of the soil to form a soil wall containing iron oxide nanomaterials, which can absorb phosphorus in the phosphorus-containing water flowing through the soil wall, so as to control the excessive use of pesticides and fertilizers. , human and animal excrement and domestic sewage discharge, and other non-point source pollution of phosphorus. It has the characteristics of high efficiency, convenience and wide application range. The invention belongs to the field of environmental pollution control. technical background [0002] In the pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 潘纲李垒
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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