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Process for modifying and regenerating natural zeolite by utilizing seawater

A natural zeolite and seawater technology, applied in filter regeneration, petroleum industry, adsorption water/sewage treatment, etc., can solve the problems of high consumption of chemicals and high cost of modification, and achieve the effect of low cost, easy operation and excellent adsorption performance

Inactive Publication Date: 2010-04-14
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, among numerous modification technologies, the most effective method is to modify natural zeolite into sodium-type zeolite in sodium chloride solution. The zeolite is modified by the solution, which requires a lot of reagents, and the regeneration solution of the zeolite often uses a high-concentration alkaline sodium chloride solution, resulting in high costs for the modification of the zeolite by the sodium chloride solution and the regeneration technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] 1) Seawater pretreatment:

[0021] To obtain seawater from offshore waters, first filter the seawater with precision filter paper to remove impurities, then irradiate the seawater with ultraviolet light for 30 minutes to kill microorganisms in the seawater, and finally heat and boil the seawater for 1 hour to remove ammonia nitrogen in the seawater. The pH value of seawater after pretreatment is 8.85, which is slightly alkaline.

[0022] 2) Pretreatment of zeolite:

[0023] First, sieve the natural zeolite, collect the zeolite with a particle size of 20-40 mesh, and then wash the zeolite with deionized water several times to clean the zeolite powder produced during the sieving, and finally place the zeolite in an electric drying box , dried at 80°C for later use.

[0024] 3) Modification of zeolite:

[0025] Firstly weigh 100g of zeolite treated in step "2)", then measure 3500ml of seawater treated in step "1)", place the zeolite in seawater for modification, and soa...

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Abstract

The invention provides a process for modifying and regenerating natural zeolite by utilizing seawater. The process comprises the following step: chemically soaking pretreated natural zeolite in pretreated seawater at constant temperature for 24h to modify, thereby improving the adsorption capacity of ammonia nitrogen by twice. Saturated zeolite is regenerated by seawater at normal temperature or heated temperature, the ammonia nitrogen is easy to desorb, and the regeneration performance is fine. The zeolite modified by the process can lower the content of the ammonia nitrogen in waste water, and the process for modifying and regenerating is simple to operate and low in price, has certain environmental and economic benefits and will offer preference for the engineering application of the zeolite for water pollution control.

Description

technical field [0001] The invention relates to a modification and regeneration technology of natural zeolite which uses seawater to remove ammonia nitrogen in waste water. The invention uses seawater to modify and regenerate the zeolite, which improves the adsorption capacity of the natural zeolite to ammonia nitrogen in waste water, and uses seawater to regenerate the saturated zeolite, which has excellent regeneration performance. Using seawater for the modification and regeneration of natural zeolite without adding any chemicals has the advantages of simplicity and low cost. It effectively realizes the removal of ammonia nitrogen in wastewater and the regeneration of zeolite, and expands the use of zeolite in wastewater treatment projects. in the application. Background technique [0002] Ammonia nitrogen in wastewater not only endangers the ecology of water bodies, but also endangers human health. Therefore, the removal of ammonia nitrogen in wastewater has become an i...

Claims

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Application Information

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IPC IPC(8): B01J20/34C02F1/28
Inventor 贺君刘树娟李建英林立君郑海武
Owner YANSHAN UNIV