Polymorphic zeolite/C-S-H composite adsorption material as well as preparation method and application thereof

A composite adsorption material, C-S-H technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as unsatisfactory removal performance, high cost, heavy metal adsorption, etc.

Active Publication Date: 2021-08-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high cost, unsatisfactory heavy metal adsorption and removal performance in the existing heavy metal adsorption means, the first purpose of the present invention is to provide a method for preparing a multi-type zeolite / C-S-H composite adsorption material, aiming at improving the obtained Heavy metal adsorption performance of the adsorbent

Method used

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  • Polymorphic zeolite/C-S-H composite adsorption material as well as preparation method and application thereof
  • Polymorphic zeolite/C-S-H composite adsorption material as well as preparation method and application thereof
  • Polymorphic zeolite/C-S-H composite adsorption material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Calcium oxide and aluminum-silicon raw materials (mass ratios of calcium / silicon are 0.38, 0.45, 0.75, 0.80 respectively; Si / Al mass ratio is 1.7) are placed in a sodium hydroxide solution with a concentration of 0.5mol / L to obtain a slurry, wherein, The liquid-solid ratio is 15ml / g, and it is heated to 170°C in a closed container for hydrothermal reaction for 3 hours; followed by solid-liquid separation and drying to obtain the composite material.

[0055] The separated composite material was subjected to the heavy metal adsorption experiment, and the realization process was as follows: prepare a heavy metal ion solution with a concentration of 100mg / L with the nitrate of the corresponding metal to be tested, adjust the pH of the heavy metal ion solution to 4.5, and then mix the composite adsorbent according to 0.1 The dosage of g / L is added to the heavy metal ion solution, shaken in a constant temperature oscillator for 4 hours, and then taken out. The conditions of t...

Embodiment 2

[0060] Compared with Case No. 3 of Example 1, the only difference is that the water heating temperatures are 130°C, 150°C, 190°C, and 210°C respectively

[0061] The adsorption effect is shown in Table 2:

[0062]

[0063] 3* is the No. 3 case of embodiment 1;

Embodiment 3

[0065] Compared with Case No. 3 of Example 1, the only difference is that the hydrothermal reaction time is respectively 0.5h, 1h, 5h, and 7h;

[0066] table 3:

[0067]

[0068]

[0069] 3* is the No. 3 case of embodiment 1;

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Abstract

The invention belongs to the technical field of waste utilization and treatment, and particularly discloses a preparation method of a multi-type zeolite / C-S-H composite adsorption material, which comprises the following steps: slurrying a calcium-silicon-aluminum raw material and alkali with water, and carrying out hydrothermal treatment, wherein the mass ratio of CaO to SiO2 is 0.45-0.75, and the mass ratio of SiO2 to Al2O3 is 1.2-2.0; and after the reaction, separating to obtain a composite adsorption material containing crystalline polymorphic zeolite and amorphous hydrated calcium silicate, wherein in the pulpified slurry, the liquid-solid ratio is 5-18 mL / g, the temperature of the hydrothermal reaction is 160-190 DEG C, and the time of the hydrothermal reaction is 1-5 hours. Through cooperative control of the conditions, the multi-type zeolite / C-S-H composite adsorption material can be obtained, and the material obtained under the cooperative process has better metal adsorption performance.

Description

technical field [0001] The invention discloses a polytype zeolite / C-S-H composite adsorption material and its preparation method and application, belonging to the field of preparation of inorganic adsorption materials. Background technique [0002] Water resources are an irreplaceable natural resource. With the continuous acceleration of the industrialization process, the pollution of heavy metal ions in the water environment is becoming more and more serious. How to effectively treat heavy metal wastewater has become the focus of attention. At present, the main sources of heavy metal wastewater are industrial wastewater such as mining, metal smelting, electroplating, paint, and pesticides. The heavy metals generally contain cadmium, copper, lead, zinc, chromium, nickel, etc. [0003] Heavy metal wastewater treatment methods include chemical precipitation, ion exchange, electrolysis, membrane separation, adsorption, etc. The chemical precipitation method is to add quicklim...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/186B01J20/28059B01J20/28061B01J20/28083C02F1/281C02F2101/20
Inventor 李光辉罗骏姜涛曹鹏旭饶明军张鑫彭志伟
Owner CENT SOUTH UNIV
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