Adsorbent for dioxins and heavy metals and preparation method thereof

Abstract

The invention discloses an adsorbent for dioxins and heavy metals and a preparation method thereof, relating to the technical field of pollutant adsorbents. The adsorbent comprises the following components: 70-75 parts of bentonite, 5-10 parts of wood charcoal, 2-5 parts of graphene, 2-5 parts of lignin, 10-15 parts of sodium bicarbonate and 2-5 parts of water. According to the adsorbent for the dioxins and the heavy metals and the preparation method thereof, the adsorbent has high adsorption efficiency, can process other acid gases, is cheaper than a traditional adsorbent, has a wide use temperature range and high adsorption efficiency, co-processes other acid gases in addition to adsorbing harmful substances such as the dioxins and the heavy metals, is lower in cost, and has a high domestic production degree in China, broad application prospects, and the effect of removing part of acid gases, the practicality of the adsorbent is greatly improved, and the adsorbent can be used for large-scale promotion and use and has higher practicability.

Description

technical field [0001] The invention relates to the technical field of pollutant adsorbents, in particular to a dioxin and heavy metal adsorbent and a preparation method thereof. Background technique [0002] With the development of modern industrialization in various countries in the world, more and more industrial wastes and domestic wastes are produced. The incineration of wastes and garbage has become one of the most important and effective technologies for waste disposal in various countries. However, the waste incineration process will inevitably produce a large amount of pollutants, such as particulate matter, acid gas, heavy metals and dioxins. These pollutants are extremely harmful to human health, among which dioxin is the most harmful and the most difficult to remove. Dioxins include more than 210 kinds of compounds. These substances are stable and hardly soluble in water, but soluble in most organic solvents. They are colorless, odorless, fat-soluble substances ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dioxin and heavy metal adsorbent and its preparation method, which solves the problems of expensive catalyst, high investment and high operating cost, which limit the development in our country, and the physical adsorption method does not Dioxins cannot be eradicated, and it is difficult to remove wastewater and waste residues