Application of nano-iron synthesized by tea leaves in p,p'-DDT removal

A tea leaf and nano-iron technology, applied in nanotechnology, restoration of polluted soil, water/sludge/sewage treatment, etc., can solve the problems of high toxicity accumulation, restricting the feasibility of animal restoration, and long restoration period, etc. Achieve the effect of low technical requirements, good application prospects and improved degradation efficiency

Inactive Publication Date: 2016-09-21
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the problems of long repair period and the treatment of plants in the later stage, and because of the high toxicity and accumulation of organochlorine pesticides to organisms, the feasibility of animal restoration is restricted.

Method used

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  • Application of nano-iron synthesized by tea leaves in p,p'-DDT removal
  • Application of nano-iron synthesized by tea leaves in p,p'-DDT removal
  • Application of nano-iron synthesized by tea leaves in p,p'-DDT removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Collection and processing of tea leaves

[0054] The tea tree leaves used in the present invention are all collected from Qianchuan Town, Lin'an City, Zhejiang Province. The tea tree leaves collected are not young leaves for drinking, but non-drinkable leaves located near the roots and with a long growth cycle. After the tea tree leaves that have been washed off the surface impurities are naturally dried, they are ground and passed through a 140-mesh standard sieve, and sealed in bags for later use.

[0055] (2) Preparation of plant extract

[0056] Select 10g of plant powder and 200ml of ultrapure water and add them to a conical flask at a mass-to-volume ratio of 1:20 for mixing. Seal the conical flask and heat and stir in a water bath at 80°C for 2 hours on a magnetic stirrer. Then the plant mixture was centrifuged at 3000 rpm for 5 minutes, and passed through a 0.45 μm organic phase needle filter to obtain tea tree leaf extract.

[0057] (3) Synthesis of green ...

Embodiment 2

[0064] (1) Collection and processing of tea leaves

[0065] The tea tree leaves used in the present invention are all collected from Qianchuan Town, Lin'an City, Zhejiang Province. The tea tree leaves collected are not young leaves for drinking, but non-drinkable leaves located near the roots and with a long growth cycle. After the tea tree leaves that have been washed off the surface impurities are naturally dried, they are ground and passed through a 140-mesh standard sieve, and sealed in bags for later use.

[0066] (2) Preparation of plant extract

[0067] Plant powder and ultrapure water were selected and added to a conical flask at a mass-to-volume ratio of 1:20 for mixing. The conical flask was sealed and heated and stirred in a water bath at 80°C for 2 hours on a magnetic stirrer. Then the plant mixture was centrifuged at 3000 rpm for 5 minutes, and passed through a 0.45 μm organic phase needle filter to obtain tea tree leaf extract.

[0068] (3) Synthesis of green n...

Embodiment 3

[0074] (1) Collection and processing of tea leaves

[0075] The tea tree leaves used in the present invention are all collected from Qianchuan Town, Lin'an City, Zhejiang Province. The tea tree leaves collected are not young leaves for drinking, but non-drinkable leaves located near the roots and with a long growth cycle. After the tea tree leaves that have been washed off the surface impurities are naturally dried, they are ground and passed through a 140-mesh standard sieve, and sealed in bags for later use.

[0076] (2) Preparation of plant extract

[0077] Select 10g of plant powder and 20ml of ultrapure water and add them into a conical flask at a mass-to-volume ratio of 1:20 for mixing. Seal the conical flask and heat and stir in a water bath at 80°C for 2 hours on a magnetic stirrer. Then the plant mixture was centrifuged at 3000 rpm for 5 minutes, and passed through a 0.45 μm organic phase needle filter to obtain tea tree leaf extract.

[0078] (3) Synthesis of green...

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Abstract

The invention discloses the application of nano-iron synthesized by tea leaves in p,p'-DDT removal. According to the application, tea powder which is located near the root and has long growth cycle is mixed with ultrapure water according to the proportion of 1g:10-40 mL, and centrifugation and filtration are conducted, so that a tea leaf extracting solution is obtained; and the tea leaf extracting solution and an FeSO4 solution with the concentration being 0.1 mol/L are mixed according to the volume ratio of 2:1, and oscillation is conducted for 30 min under the conditions that the temperature is 25 DEG C and the rotating speed is 250 rpm, so that green nano-iron turbid liquid is obtained. The application of the nano-iron synthesized by tea leaves in p,p'-DDT removal has the advantages that equipment is simple, the application can be conducted at the normal temperature and pressure, the cost is low, and environmental friendliness is achieved; and in addition, the application belongs to waste utilization, the requirements for the technical conditions are low, the time efficiency is high, and industrial production can be achieved hopefully. The p,p'-DDT degradation efficiency of the obtained nano-iron is remarkably improved, and the nano-iron has good application prospects in the field of organic pollutant degradation.

Description

technical field [0001] The invention relates to a preparation method of a green nano-iron suspension, in particular to an application of nano-iron synthesized by tea tree leaves in removing p,p'-DDT. Background technique [0002] DDT is a typical organochlorine pesticide and belongs to persistent organic pollutants. As a major agricultural producer, my country is the world's largest pesticide consumer and the second largest producer. Among them, organochlorine pesticides are the main pesticides in my country, and their output has exceeded 50% of the total amount of pesticides in my country. In 1970, the amount of organochlorine pesticides such as DDT, BCH, and toxaphene reached 191,700 tons, accounting for about 80% of the total pesticide use. Later, with the publication of the classic environmental protection book "Silent Spring" by Rachel Carson, people began to gradually pay attention to the safety of DDT, a highly effective insecticide. The United States, Canada, and S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B09C1/08B82Y40/00C02F1/70C02F101/36
CPCB22F9/24B09C1/08B82Y40/00C02F1/705C02F2101/36
Inventor 周溶冰章结焱王雅玉吴卫红唐俊红赵红挺
Owner HANGZHOU DIANZI UNIV
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