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Glauconite-based composite heavy metal wastewater treatment porous material as well as preparation method and application thereof

A wastewater treatment and porous material technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult recycling, high difficulty of filtration and separation, and achieve good removal effect, significant market value, and effect on social value

Pending Publication Date: 2021-12-17
长沙工研院环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, heavy metal adsorption materials prepared with glauconite as the basic material are generally in the form of powder, and heavy metal wastewater still needs to be filtered and collected after treatment, and the difficulty of filtration and separation makes it difficult to recycle and reuse.

Method used

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  • Glauconite-based composite heavy metal wastewater treatment porous material as well as preparation method and application thereof
  • Glauconite-based composite heavy metal wastewater treatment porous material as well as preparation method and application thereof
  • Glauconite-based composite heavy metal wastewater treatment porous material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A composite heavy metal wastewater treatment porous material based on glauconite, prepared from the following raw materials in parts by weight: 24 parts of glauconite, 17 parts of deacetylated chitin, 14 parts of sodium bentonite, 8 parts of pore-forming agent, 5 parts of graphene oxide, 5 parts of sodium hydroxide;

[0031] Its preparation method, the steps are as follows:

[0032] 1) Sodium hydroxide is mixed with 8.4 times of its weight in distilled water to obtain a sodium hydroxide solution;

[0033] 2) putting glauconite, chitosan, and sodium bentonite into a crusher respectively for crushing, and then passing through a 400-mesh sieve to obtain powder;

[0034] 3) Weigh the glauconite powder, chitosan powder and sodium bentonite powder respectively, add sodium hydroxide solution, stir with a magnetic stirrer at a speed of 800r / min for 25min, and then let stand for 12h;

[0035] 4) remove the supernatant, and wash the lower sediment with water for several times; ...

Embodiment 2

[0041] A composite heavy metal wastewater treatment porous material based on glauconite, prepared from the following raw materials in parts by weight: 26 parts of glauconite, 18 parts of chitin, 15 parts of sodium bentonite, 10 parts of pore-forming agent, 5.5 parts of graphene oxide, 5 parts of sodium hydroxide;

[0042] Its preparation method is with embodiment 1.

Embodiment 3

[0044] A composite heavy metal wastewater treatment porous material based on glauconite, prepared from the following raw materials in parts by weight: 28 parts of glauconite, 19 parts of chitin, 16 parts of sodium bentonite, 12 parts of pore-forming agent, 6 parts of graphene oxide, 5 parts of sodium hydroxide;

[0045] Its preparation method is with embodiment 1.

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Abstract

The invention discloses a glauconite-based composite heavy metal wastewater treatment porous material as well as a preparation method and an application thereof. The porous material is prepared from the following raw materials in parts by weight: 23-32 parts of glauconite, 15-21 parts of deacetylated chitin, 13-18 parts of sodium bentonite, 8-15 parts of a pore-forming agent, 4-10 parts of graphene oxide and 2-9 parts of sodium hydroxide. The composite powder is firstly obtained and then pressed into the pressed blank through CIP, the pressed blank is subjected to a solid-phase sintering process under the action of the pore-forming agent, and the sintering process is controlled to be finished in the sintering middle stage, so that the porous material generates a large number of pores and meets the porosity requirement while the matrix strength is guaranteed, a self-bearing structure is obtained, and the requirement for renewable utilization is met; the product is used for adsorbing and removing lead and copper in heavy metal wastewater, and has an excellent adsorption and removal effect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a glauconite-based composite porous material for heavy metal wastewater treatment and its preparation method and application. Background technique [0002] In water pollution, wastewater containing heavy metals poses a huge threat to the living environment. At present, there are three main types of heavy metal wastewater treatment: chemical method, physical method and biological method, among which the adsorption method in the physical method is one of the most commonly used methods. Commonly used adsorbents include natural materials and artificial materials. Natural materials include activated carbon, minerals, etc., and artificial materials include modified mineral-based materials and modified nano-powder materials. Generally speaking, natural materials are easier to obtain and lower in cost, but the adsorption effect is poor and it is di...

Claims

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Application Information

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IPC IPC(8): B01J20/16C02F1/28B01J20/30C02F101/20
CPCB01J20/16B01J20/12C02F1/281C02F2101/20
Inventor 杨霆何曦
Owner 长沙工研院环保有限公司
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