Preparation method of modified activated carbon used for heavy metal wastewater treatment

Abstract

The invention discloses a preparation method of modified activated carbon used for heavy metal wastewater treatment. The preparation method comprises the steps that firstly, activated carbon is washed, dried, ground, sieved and soaked, so that pores of the activated carbon are filled with water; secondly, clean air is blown so that the activated carbon can be in a boiling state, and an oxidizing agent is sprayed for controllable oxidation; thirdly, N-(2,3-glycidyl) iminodiacetic acid disodium allows iminodiacetic acid disodium to be connected to the surface of the activated carbon through epoxy group ring opening. According to the prepared modified activated carbon, hydroxyls, carboxyls and iminodiacetic acid groups having a strong effect on heavy metal ions are introduced only on the surface, the original hole channel structure feature of the activated carbon is maintained, the capacities of strong heavy metal adsorption and organic pollutant removal are both achieved, and the dual purposes of removing heavy metal and organic pollution can be achieved by one step through adsorption via activated carbon. Meanwhile, the adsorbed heavy metal is easy to recycle, the activated carbon is easy to regenerate, the cycle service life of the activated carbon is long, no secondary pollution will occur, and therefore the preparation method has good application and popularization prospects.

Description

technical field

[0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a preparation method of modified activated carbon used for heavy metal wastewater treatment. Background technique

[0002] Heavy metals cannot be degraded by microorganisms, can be enriched in organisms and cause significant toxic effects, and are persistent pollutants. For example, mercury, cadmium, chromium, lead, arsenic, etc. seriously endanger human health, damage aquatic ecosystems, reduce agricultural and fishery production, etc., causing huge economic losses and becoming a major problem restricting my country's economic and social development and improving people's livelihood. Aiming at heavy metal pollution, people have developed a variety of water treatment methods, such as chemical precipitation, ferrite, adsorption, ion exchange, electrolysis, reverse osmosis, electrodialysis, enhanced ultrafiltration, biological methods, etc. There are some shortcomin...

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