Application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions

A low-concentration heavy metal and heavy metal ion technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as environmental pollution, inability to remove heavy metal ions, and affect domestic water safety. The effect of low operation and cost

Inactive Publication Date: 2013-02-13
KEY LAB OF INORGANIC SYNTHESIS & PEPARATIVE CHEM AT JILIN UNIV IN ZHUHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary sewage treatment technology cannot further remove trace amounts of heavy metal ions. If such unqualified primary treated sewage is discharged into rivers, it will inevitably pollute the environment and affect people's domestic water safety.
Considering the cost of sewage treatment, some high-end water treatment technologies, such as drinking water treatment technology, are not suitable for sewage treatment in ordinary industrial production. Any cost in sewage treatment will greatly increase the cost of industrial production products. Conducive to the competition of enterprise products in the market

Method used

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  • Application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions
  • Application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions
  • Application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] ① Prepare Ni with a concentration of 1ppm, 10ppm, and 100ppm 2+ solution.

[0048] ②NaA molecular sieve (prepared by Example 11) to Ni 2+ exchange

[0049]

[0050] ICP test test results show that in the final solution, Ni 2+ The concentrations are all less than 0.02ppm.

Embodiment 2

[0052] ① Prepare Mn with concentrations of 1ppm, 10ppm, and 100ppm 2+ solution.

[0053] ②NaA molecular sieve (prepared by Example 11) to Mn 2+ exchange

[0054]

[0055] ICP test results show that when Mn 2+ When the initial concentration is 1ppm and 10ppm, in the final solution, Mn 2+ The concentration is less than 0.02ppm; when Mn 2+ When the initial concentration is 100ppm, in the final solution, Mn 2+ The concentration is 0.09ppm;

[0056] ③NaX type molecular sieve (prepared by embodiment 12) to Mn 2+ exchange

[0057]

[0058] ICP test results show that when Mn 2+ When the initial concentration of 1ppm, 10ppm and 100ppm, in the final solution, Mn 2+ The concentrations are all less than 0.02ppm.

Embodiment 3

[0060] ①Preparation of Co with concentration of 1ppm, 10ppm, 100ppm 2+ solution.

[0061] ②NaA molecular sieve (prepared by Example 11) to Co 2+ exchange

[0062]

[0063] ICP test results show that when Co 2+ When the initial concentration is 1ppm and 10ppm, in the final solution, Co 2+ The concentration is less than 0.02ppm; when Co 2+ When the initial concentration is 100ppm, in the final solution, Co 2+ The concentration is 0.03ppm;

[0064] ③NaX type molecular sieve (prepared by Example 12) to Co 2+ exchange

[0065] In solution, Co 2+ The concentration is less than 0.02ppm; when Co 2+ When the initial concentration is 100ppm, in the final solution, Co 2+ The concentration is 0.03ppm.

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Abstract

The invention belongs to the technical field of sewage treatment, and in particular relates to application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions. The invention solves the problem that the concentration of the low-concentration heavy metal ions is not up to standard in primary treatment of sewage through selecting proper conditions to carry out exchange separation under the trace concentration; the concentration of the low-concentration heavy metal ions in the sewage, which is subjected to secondary treatment through the technology, is far lower than the industrial standard; and the application has the advantages of easiness in operation of exchange steps and conditions, and low cost, and is very suitable for a sewage treatment process in industry. Through regeneration, after the molecular sieves are exchanged, most of the absorbed heavy metal ions are replaced to sodium ions, and the regenerated molecular sieves are recycled. The NaX and the NaY related by the invention are obtained by hydro-thermal synthesis, and a ratio of silicon to aluminum is 1: 1-1: 3.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to the application of low-silicon microporous NaA type and NaX type molecular sieves in treating low-concentration heavy metal ions. Background technique [0002] With the rapid development of industrial production and the intensification of urbanization, the use of heavy metals is becoming more and more extensive, and the serious problem that follows is that water bodies are polluted by heavy metals. 我国现有的污水处理技术有很多,例如采用电化学方法(CN201437512U,CN101088938A,CN201864610U,CN1459421A,CN2910910Y)、生化方法(CN101352672A,CN101992000A,CN101402491A,CN1900271A,CN101628756A,CN1958465A,CN101063096A)、污泥法(CN1194238A ,CN1548382A,CN1702044A)、有机物去除法(CN101070205A,CN1803659A,CN101905148A,CN1676635A,CN101804330A,CN101947381A,CN101746843A,CN101560002A,CN101992064A,CN101757885A,CN101759270A)、磁性法(CN87210733U,CN87105033A,CN86108101A)和其他方法(CN101492197A,CN101613135A, CN101037287A, CN101186375A, CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/62
Inventor 薛铭张文婷康子曦范黎黎裘式纶
Owner KEY LAB OF INORGANIC SYNTHESIS & PEPARATIVE CHEM AT JILIN UNIV IN ZHUHAI
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