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Acid-Assisted Rapid Degradation of DDT by Zero-Valent Iron with Flake Micro/Nano Structures

A rapid degradation and nanostructure technology, applied in the field of chemical applications, can solve long-term problems ranging from a few days or even a few months, and achieve the effect of low cost and shortened treatment time

Active Publication Date: 2016-10-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of nano-zero-valent iron to treat chlorine-containing organic pollutants DDT has received widespread attention. However, due to the lack of suitable methods, the treatment period is relatively long, ranging from days to months.

Method used

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  • Acid-Assisted Rapid Degradation of DDT by Zero-Valent Iron with Flake Micro/Nano Structures
  • Acid-Assisted Rapid Degradation of DDT by Zero-Valent Iron with Flake Micro/Nano Structures
  • Acid-Assisted Rapid Degradation of DDT by Zero-Valent Iron with Flake Micro/Nano Structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 A method for rapid degradation of DDT by acid-assisted flaky micro / nano-structured zero-valent iron, comprising the following steps:

[0032] (1) Take 12 20ml sample bottles, the bottle cap gasket is made of polytetrafluoroethylene, and add 40mg of flaky micro / nano-structured zero-valent iron to each sample bottle;

[0033] (2) Add 10ml of 5ppm DDT aqueous solution to each sample;

[0034] (3) Shake and vortex for 1 min to fully mix the sheet-like micro / nano-structured zero-valent iron with the solution;

[0035] (4) Add 100uL 1M HCl to each vial;

[0036] (5) Fill the vial to 25 o C on a constant temperature shaker, shake at 300 Hz for 5 min and take it out;

[0037] (6) Repeat (4) and (5), and end the whole reaction after 60 min;

[0038] (7) Add 5 ml of chromatographic grade n-hexane to the reacted sample, and vortex for 2 min;

[0039] (8) After standing for stratification, take the supernatant for testing. The concentration change of DDT was analyze...

Embodiment 2

[0040] Example 2 A method for rapidly degrading DDT by acid-assisted flaky micro / nano-structured zero-valent iron, comprising the following steps:

[0041] (1) Take 12 20ml sample bottles and PTFE bottle pads, and add 40mg of flaky micro / nano-structured zero-valent iron to each sample bottle;

[0042] (2) Add 10ml of 5ppm DDT aqueous solution to each sample;

[0043] (3) Vortex and vortex for 1 min to fully mix the micro / nano-structured zero-valent iron with the solution;

[0044] (4) Add 50uL 1M HCl to each vial;

[0045] (5) Fill the vial to 25 o C on a constant temperature shaker, shake at 300 Hz for 5 min and take it out;

[0046] (6) Repeat (4) and (5), and end the whole reaction after 120 min;

[0047] (7) Add 5 ml of chromatographic grade n-hexane to the reacted sample, and vortex for 2 min;

[0048] (8) After standing for stratification, take the supernatant for testing. The concentration change of DDT was analyzed by GC-MS as Figure 5 shown.

Embodiment 3

[0050] A method for rapid degradation of DDT by acid-assisted flaky micro / nano-structured zero-valent iron, comprising the following steps:

[0051] (1) Take 12 20ml sample bottles and PTFE bottle pads, and add 40mg of flaky micro / nano-structured zero-valent iron to each sample bottle;

[0052] (2) Add 10ml of 5ppm DDT aqueous solution to each sample;

[0053] (3) Vortex and vortex for 1 min to fully mix the micro / nano-structured zero-valent iron with the solution;

[0054] (4) Add 0 uL of 1M HCl to each vial;

[0055] (5) Fill the vial to 25 o C on a constant temperature shaker, shake at 300 Hz for 5 min and take it out;

[0056] (6) Repeat (4) and (5), and end the whole reaction after 60 min;

[0057] (7) Add 5 ml of chromatographic grade n-hexane to the reacted sample, and vortex for 2 min;

[0058](8) After standing for stratification, take the supernatant for testing. The concentration change of DDT was analyzed by GC-MS as Figure 6 shown.

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Abstract

The invention discloses a method for rapidly degrading DDT through acid-assisted flaky micro / nanostructure zero-valent iron, and application of the DDT in sewage treatment. The method comprises the following steps: adding a certain amount of flaky micro / nanostructure zero-valent iron into DDT-containing polluted water, then adding hydrochloric acid with certain concentration, and fully reacting so as to rapidly degrade DDT into DDD, DDMS, DDNS and other substances, so that the purpose of fast treating DDT can be realized. According to the method, the cost of raw materials is low, tonnage production can be performed, the DDT degradation speed is fast, the treatment time is shortened, the degradation process of the DDT by adopting the method is environment-friendly, any toxic and harmful substances are not used, the reaction temperature is low, the time is short, and the technology is simple and low-cost.

Description

technical field [0001] The invention mainly relates to a method for rapidly degrading DDT by acid-assisted flaky micro / nano-structured zero-valent iron, which belongs to the field of chemical applications. Background technique [0002] DDT is one of the first 12 persistent organic pollutants in the Stockholm Convention on Persistent Organic Pollutants, and it is also an organochlorine pesticide (Pesticide). It is stable in nature and difficult to decompose in nature. When the human body ingests a lot, chronic poisoning symptoms will appear, such as: loss of appetite, pain in the upper abdomen and right rib, headache, dizziness, muscle weakness, fatigue, insomnia , vision and language impairment, tremor, anemia, weakened deep reflexes of the limbs, etc., and lead to endocrine disorders at the same time. [0003] Experiments have shown that DDT has estrogen-like effects and belongs to environmental estrogens. It can interfere with the function of the hypothalamus-pituitary-g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F101/36
Inventor 康升红蔡伟平汪国忠赵惠军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI