Method of removing pollutant in water with mechanical ball-milling activated zero-valent aluminum

A technology of mechanical ball milling and zero-valent aluminum, which is applied in the direction of water pollutants, chemical instruments and methods, water/sewage treatment, etc., can solve the problem of low removal rate of pollutants in water, and achieve simple operation, high-efficiency removal, and cheap medicines Easy to get effect

Inactive Publication Date: 2019-09-27
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It uses grinding aids to assist mechanical ball milling to activate the reactivity of micron zero-valent aluminum powder, which effectively solves the problem of low removal rate of existing micron zero-valent aluminum powder for water pollutants, and then realizes the removal of various organic and inorganic pollution in water. Efficient removal of pollutants, broadening the application of zero-valent aluminum powder in the field of pollutant removal

Method used

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  • Method of removing pollutant in water with mechanical ball-milling activated zero-valent aluminum
  • Method of removing pollutant in water with mechanical ball-milling activated zero-valent aluminum
  • Method of removing pollutant in water with mechanical ball-milling activated zero-valent aluminum

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Add a total of 300g of zirconia grinding balls to a stainless steel ball milling tank with a volume of 500mL, and add grinding balls with diameters of 10mm, 8mm and 5mm at a mass ratio of 1:3:6, that is, the masses are 30g, 90g and 180g respectively ; Weigh 5.0g of zero-valent aluminum powder (75 ~ 150μm, specific surface area 0.35m 2 / g) is transferred to a ball mill jar, that is, the mass ratio of zero-valent aluminum powder to grinding balls is 1:60, then add 0.5mL of absolute ethanol (the mass ratio of zero-valent aluminum powder is 7.8:100), and vacuumize Finally, nitrogen is filled to ensure that the tank is an inert atmosphere, and the ball mill tank is symmetrically placed in a planetary ball mill, and the set speed is 300rpm. Every 30min in the ball mill, stop running for 10min, and the ball milling time is 0.5h;

Embodiment 2

[0029] Repeat embodiment 1 by the same steps as described, and adjust the ball milling time to 1.0h;

Embodiment 3

[0031] Repeat embodiment 1 by the same steps as described, and adjust the ball milling time to 2.0h;

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Abstract

The invention provides a method of removing pollutants in water with mechanical ball-milling activated zero-valent aluminum. Reaction activity of micron zero-valent aluminum powder is activated through mechanic ball milling assisted by a grinding aid, so that the problem that existing micron zero-valent aluminum powder has low rate in removing pollutants in water is effectively solved, and efficient removal of organic and inorganic pollutants in water is realized, and application of zero-valent aluminum powder in the field of pollutant removal is expanded. Compared with removal of pollutants in water with existing micron zero-valent aluminum powder disclosed by the invention, mechanic ball-milling activated zero-valent aluminum greatly improves removal rate of pollutants, can be used to efficient reduction and removal of various organic and inorganic pollutants, and is extensive in pH application scope. Compared with existing zero-valent aluminum powder surface oxidation film removal method of the pollutant-removal field, the method provided by the invention is efficient, easy to operate, and low in chemical price and easily available in chemicals.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for removing pollutants in water by mechanical ball milling to activate zero-valent aluminum. Background technique [0002] Aluminum is the most abundant metal element in the earth's crust, and its redox potential is extremely low (E 0 =-1.662V), light weight (ρ=2.70g / cm 3 ), has amphoteric properties, and is an excellent electron donor (1 atom generates 3 electrons). In recent years, zero-valent aluminum has gradually attracted attention due to its strong reducing properties, and has been used in the removal of pollutants in water. Studies have shown that zero-valent aluminum can effectively remove organic pollutants such as phenols, azo dyes, organic halides, endocrine disruptor atrazine, inorganic pollutants such as heavy metals, bromate and nitrate, and uranium ( U(VI)) and other radioactive elements. However, under natural conditions, zero-v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70B02C17/20B02C17/10C02F101/20C02F101/22C02F101/30
CPCB02C17/10B02C17/20C02F1/705C02F2101/20C02F2101/22C02F2101/30
Inventor 杨世迎张艺萱肖薇薇刘俊琴
Owner OCEAN UNIV OF CHINA
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