Preparation detection method of adsorbent based on leaked PX in soil

A detection method and adsorbent technology, applied in the preparation of test samples, chemical instruments and methods, measuring devices, etc., can solve the problems of complex adsorbent preparation methods, poor adsorption effect, high synthesis cost, etc., and achieve good industrial production Value and application value, good accuracy, and the effect of less sample consumption

Inactive Publication Date: 2016-01-20
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The adsorbents developed above have defects such as complex preparation methods, high synthesis costs, poor adsorption effects, low toxicity, poor stability, and high prices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation detection method based on the adsorbent of leaking PX in soil, comprises analyzing with thermogravimetric analysis, and it has the following steps:

[0023] 1) Use a certain concentration of potassium chloride solution to exchange with 13X molecular sieve at a suitable temperature, continuously stir and exchange for 2 hours, repeat the exchange several times, after each exchange, wash with deionized water several times until there is no potassium ion in the washing solution , put the product in an oven at 50°C and dry for 5-12 hours to obtain a high-potassium KX molecular sieve sample;

[0024] 2) Exchange the high-potassium KX molecular sieve sample obtained in step 1) with the barium chloride solution at a suitable temperature, continuously stir and exchange for 1 hour, and repeat the exchange several times. After each exchange, wash it with deionized hot steam for several times to wash Dry and wash the molecular sieve until there is no b...

Embodiment 2

[0029] 1) Use a certain 3.5mol / L potassium chloride solution to exchange with 13X molecular sieve at 45°C, continuously stir and exchange for 2 hours, repeat the exchange several times, and wash with deionized water several times after each exchange until there is no The product was dried in an oven at 50° C. for 12 hours to obtain a high-potassium KX molecular sieve sample. 2) Exchange the KX molecular sieve sample obtained in step 1) with 4.5mol / L barium chloride solution at 50°C, continuously stir and exchange for 1 hour, repeat the exchange several times, and wash with deionized water several times after each exchange Dry the washed molecular sieve until there is no barium ion in the washing solution, and activate the molecular sieve at a certain temperature to obtain a barium-exchanged molecular sieve sample. 3) Take about 5g of soil containing leaked PX, add aqua regia, and use a microwave digestion apparatus to digest. Pass the digested digestion solution into a mixed ...

Embodiment 3

[0031] 1) Exchange a certain 4mol / L potassium chloride solution with 13X molecular sieve at 50°C, continuously stir and exchange for 2 hours, repeat the exchange several times, and wash with deionized water several times after each exchange until there is no potassium in the washing solution The product was dried in an oven at 50° C. for 12 hours to obtain a high-potassium KX molecular sieve sample. 2) Exchange the KX molecular sieve sample obtained in step 1) with a 5mol / L barium chloride solution at 55°C, continuously stir and exchange for 1 hour, repeat the exchange several times, and wash with deionized water several times to Dry the washed molecular sieve until there is no barium ion in the washing solution, and activate the molecular sieve at a certain temperature to obtain a barium-exchanged molecular sieve sample. 3) Take about 5g of soil containing leaked PX, add aqua regia, and use a microwave digestion apparatus to digest. Pass the digested digestion solution into ...

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Abstract

The invention discloses a preparation detection method of an adsorbent based on leaked PX in soil. The preparation detection method utilizes a thermogravimetric analysis method to analyze and comprises the following steps: (1) exchanging a potassium chloride solution with a certain concentration and a 13X molecular sieve at a suitable temperature to obtain a high-potassium KX molecular sieve sample; (2) exchanging the high-potassium KX molecular sieve sample obtained by the step (1) and a barium chloride solution at a proper temperature to obtain a barium exchanged molecular sieve; (3) digesting the soil containing the leaked PX and sieving the soil by the barium exchanged molecular sieve, and determining the leaked PX amount of the molecular sieve in the soil by using the thermogravimetric analysis method. An exchanging environment is regulated and controlled by combining a magnetic environment with weak current and the adsorbent has a better continuing performance. The preparation detection method has the advantages of good adsorption effect, simplicity in operation, low cost, environmental friendliness, energy saving and emission reduction, low detection limit, good accuracy and the like, and has very good industrial production value and popularization and application value in the field of environment purification and detection.

Description

technical field [0001] The invention relates to the field of soil purification detection, in particular to a method for preparing and detecting an adsorbent based on PX leakage in soil. Background technique [0002] With the rapid development of my country's polyester industry, the consumption of terephthalic acid (PTA) has increased, which has led to the rapid growth of consumption of paraxylene (PX). The output of PX is also an important indicator of a country's chemical level. PX is the raw material for clothing and textiles, and China is a big textile country. Textiles need raw materials, so there is a great demand for them. PX has a chronic effect on the human body, that is, long-term exposure can cause kidney and liver damage, and is carcinogenic, so research on its elimination in the soil is very necessary. [0003] Although the commonly used adsorbents currently on the market have a certain adsorption effect, most of them are complex in operation, poor in adsorptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28B01J20/30G01N5/00G01N5/04
Inventor 宋文东陈嘉琳宋付权王亚宁纪丽丽李世杰蔡璐姜维胡世伟郭健
Owner ZHEJIANG OCEAN UNIV
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