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Sulphydryl lignocellulose/montmorillonite composite heavy metal ion adsorbent and preparation and application thereof

A technology of lignocellulose and montmorillonite, which is applied in the direction of adsorption of water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of weakening suspension capacity, promoting solubility, and improving interface wetting

Active Publication Date: 2015-12-02
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, a lot of research work has been done on the preparation of lignocellulose and montmorillonite (LNC / MMT) and its nanocomposite with calcium-based montmorillonite and the adsorption and desorption of heavy metal ions and dyes in wastewater. Research on the preparation of lignocellulose / montmorillonite nanocomposite adsorbent modified with active functional groups and its adsorption and desorption of heavy metal ions in industrial wastewater has not been reported

Method used

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  • Sulphydryl lignocellulose/montmorillonite composite heavy metal ion adsorbent and preparation and application thereof
  • Sulphydryl lignocellulose/montmorillonite composite heavy metal ion adsorbent and preparation and application thereof
  • Sulphydryl lignocellulose/montmorillonite composite heavy metal ion adsorbent and preparation and application thereof

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Embodiment 1

[0057] This embodiment provides a method for preparing a mercapto lignocellulose / montmorillonite composite heavy metal adsorbent, wherein the method comprises the following steps:

[0058] (1) Preparation of mercapto lignocellulose

[0059] Add 53.2000g of mercaptoacetic acid and 25.9200g of acetic anhydride into a three-neck round bottom flask, mix well, place, add 10.0000g of lignocellulose after cooling to room temperature, stir in a water bath at 40°C for 45h, take it out, wash with distilled water until neutral , filtered by suction, dried in an oven at 40°C, ground to obtain yellow-green powdered mercapto lignocellulose, and stored for intercalation reaction with montmorillonite;

[0060] (2) Preparation of mercapto lignocellulose / montmorillonite composite heavy metal adsorbent

[0061] a. Add the mercapto lignocellulose in batches to the NaOH aqueous solution with a concentration of 0.1mol / L (the mass of the mercapto lignocellulose: the volume of the NaOH aqueous solut...

Embodiment 2

[0065] This embodiment provides a method for preparing a mercapto lignocellulose / montmorillonite composite heavy metal adsorbent, wherein the method comprises the following steps:

[0066] (1) Preparation of mercapto lignocellulose

[0067] Add 57.4300g of thioglycolic acid and 29.1400g of acetic anhydride into a three-necked round-bottomed flask, mix well, place, add 10.0200g of lignocellulose after cooling to room temperature, stir in a water bath at 43°C for 47h, take it out, and wash with distilled water to neutral, suction filtered, dried in an oven at 46°C, and ground to obtain yellow-green powdered mercapto lignocellulose, which is stored for intercalation reaction with montmorillonite;

[0068] (2) Preparation of mercapto lignocellulose / montmorillonite composite heavy metal adsorbent

[0069] a. Add mercapto lignocellulose in batches to NaOH aqueous solution with a concentration of 0.18mol / L (mercapto lignocellulose mass: volume of NaOH aqueous solution = 1:37, units ...

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Abstract

The invention provides sulphydryl lignocellulose / montmorillonite composite heavy metal ion adsorbent and preparation and application thereof. The adsorbent is formed by sulphydryl lignocellulose and montmorillonite in a composite mode, wherein the mass ratio of sulphydryl lignocellulose to montmorillonite is 1:1-1.5:1, and insertion layers of sulphydryl lignocellulose enter between lamination layers of montomorillonite. The sulphydryl lignocellulose / montmorillonite composite heavy metal ion adsorbent is applied to removing heavy metal in waste water. The preparation method of the sulphydryl lignocellulose / montmorillonite composite heavy metal ion adsorbent has the advantages that preparation is easy, raw materials are easy to obtain, environmental friendliness is achieved, and no secondary pollution occurs; the obtained sulphydryl lignocellulose / montmorillonite composite heavy metal ion adsorbent is free of toxin, capable of being biologically degraded and low in cost and achieves simple and convenient adsorbing operation and a high adsorbing quantity when applied to removing heavy metal ions in waste water.

Description

technical field [0001] The invention relates to a mercapto lignocellulose / montmorillonite composite heavy metal adsorbent and its preparation and application, belonging to the technical field of composite materials. Background technique [0002] my country's water resources are scarce, and the quality of water resources is also declining. Due to the massive discharge of various types of industrial wastewater from industries such as ore processing, tanning, electroplating, and pigments, many heavy metal ions enter the water, atmosphere, and soil, and remain, accumulate, and migrate in various chemical forms, which is harmful to the human environment. It has caused great harm, and the resulting ecological damage and economic loss are immeasurable. Therefore, the treatment of industrial wastewater has attracted the attention of countries all over the world. [0003] In recent years, industries such as mining, electroplating, metallurgy, and pharmaceuticals in Inner Mongolia, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F101/20
Inventor 张晓涛王喜明刘建霞李蜀眉姬宇飞
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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