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Ferro-manganese composite pillared clay mineral material and preparation method for treating thallium in wastewater

An iron-manganese composite and pillared clay technology is applied in the fields of iron-manganese composite pillared clay mineral materials and clay adsorption materials, which can solve the problems of difficult separation and large pressure drop, and achieve fast adsorption speed, low energy consumption, high yield effect

Active Publication Date: 2019-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal oxides usually exist mainly in the form of ultrafine powders, and when they are directly applied to conventional column adsorption systems, there are engineering technical bottlenecks such as large pressure drop or difficult separation.

Method used

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  • Ferro-manganese composite pillared clay mineral material and preparation method for treating thallium in wastewater
  • Ferro-manganese composite pillared clay mineral material and preparation method for treating thallium in wastewater
  • Ferro-manganese composite pillared clay mineral material and preparation method for treating thallium in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing an iron-manganese composite pillared clay mineral material for treating thallium in wastewater, comprising the following steps:

[0045](1) Accurately weigh 0.845g of ferric chloride, 0.166g of sodium carbonate, 0.395g of potassium permanganate and 0.742g of manganese chloride, dissolve them in 50mL of deionized water respectively, then transfer them to a 100ml volumetric flask and constant volume Obtain ferric chloride solution, sodium carbonate solution, potassium permanganate solution and manganese sulfate solution respectively;

[0046] (2) The sodium carbonate solution is slowly dropped into the ferric chloride solution (the speed of dropping is 0.5mL / min), after the dropwise addition, it is aged at 60°C for 24 hours to obtain the aged product (colloidal reddish-brown Hydroxyl Iron Pillar Liquid) (i.e. iron-manganese complex, infrared spectrum as figure 2 shown);

[0047] (3) After washing the sodium montmorillonite with water, after dryin...

Embodiment 2

[0051] A method for preparing an iron-manganese composite pillared clay mineral material for treating thallium in wastewater, comprising the following steps:

[0052] (1) According to the molar ratio of ferromanganese (Mn / Fe) is 4, 3, 2, 1, 1 / 2, 1 / 3 and 1 / 4, respectively, weigh the following 7 parts of raw materials: ① Accurately weigh 0.845g respectively Ferric chloride, 0.166g sodium carbonate, 0.792g potassium permanganate, 1.280g manganese sulfate and 3.125g sodium montmorillonite; ② Accurately weigh 0.845g ferric chloride, 0.166g sodium carbonate, 0.594g permanganate Potassium, 0.960g manganese sulfate and 3.125g sodium montmorillonite; ③accurately weigh 0.845g ferric chloride, 0.166g sodium carbonate, 0.396g potassium permanganate, 0.640g manganese sulfate and 3.125g sodium montmorillonite ; ④ accurately weigh 0.845g ferric chloride, 0.166g sodium carbonate, 0.198g potassium permanganate, 0.320g manganese sulfate and 3.125g sodium montmorillonite; ⑤ accurately weigh 1.69...

Embodiment 3

[0060] The iron-manganese composite pillared clay mineral material used to treat thallium in wastewater in this example is the iron-manganese composite pillared clay mineral material prepared in Example 2 with a manganese-iron molar ratio of 1.

[0061] Put different contents of iron-manganese composite pillared clay mineral materials (dosage: 0.1, 0.2, 0.4, 0.6, 0.8, 1, 2 and 4g / L) into 50ml centrifuge tubes respectively, and pipette them into the centrifuge tubes respectively. Take 25mL prepared 1mg L -1 Tl(I) solution, mixed well, placed on a water bath shaker at 30±1°C for 24 hours, centrifuged, and the supernatant was passed through a 0.45 μm filter membrane, and the concentration of Tl(I) in the solution was measured by an atomic absorption spectrophotometer. concentration. The results test as Figure 4 shown. Figure 4 In Example 3, it is a graph showing the influence of the dosage on iron-manganese composite pillared clay mineral material except for Tl(I).

[0062]...

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Abstract

The invention belongs to the technical field of adsorption materials, and discloses an iron-manganese composite pillared clay mineral material for treating thallium in wastewater and a preparation method of the iron-manganese composite pillared clay mineral material. The preparation method comprises the following steps: (1) adding soluble iron salt, carbonate, potassium permanganate and manganese salt into deionized water, and dissolving so as to obtain an iron salt solution, a carbonate solution, a potassium permanganate solution and a manganese salt solution; (2) slowly dropping the carbonate solution into the iron salt solution, and aging so as to obtain an aged product; (3) mixing the aged product and clay minerals, aging, dropping the potassium permanganate solution, and performing ultrasonic treatment so as to obtain a mixture; (4) slowly dropping the manganese salt solution into the mixture, aging, centrifuging, washing, and drying, thereby obtaining the iron-manganese composite pillared clay mineral material. The iron-manganese composite pillared clay mineral material is relatively good in oxidation, adsorption and stability, and is good in effect and high in removal rate when used for treating thallium in industrial wastewater. The preparation method disclosed by the invention is simple, gentle in reaction condition and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and relates to a clay adsorption material, in particular to an iron-manganese composite pillared clay mineral material used for treating thallium in waste water, as well as its preparation method and application. Background technique [0002] my country is rich in thallium resources, and its reserves rank first in the world. As a functional material in the high-tech field, thallium has been widely used in medicine, aviation, electronics and other fields, and its demand is increasing day by day. But at the same time, more industrial waste containing thallium is produced, which further aggravates the environmental pollution of thallium. The toxic effect of thallium on mammals far exceeds that of conventional heavy metals such as Hg, As, Cd, Pb, and Sb. Thallium pollution in water seriously threatens human health and ecological environment. In recent years, thallium pollution inciden...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/72C02F1/28C02F101/20
CPCB01J20/0222B01J20/0229B01J20/12C02F1/281C02F1/72C02F2101/20
Inventor 吴平霄陈梅青朱能武
Owner SOUTH CHINA UNIV OF TECH
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