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Preparing multistage adsorbent for difficult degradative organic wastewater in high concentration, and method of use

An organic wastewater, high-concentration technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as difficult to remove persistent organic pollutants in wastewater, and achieve convenient regeneration, large adsorption capacity, The effect of good adsorption effect

Inactive Publication Date: 2007-12-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process is difficult to remove persistent organic pollutants in wastewater

Method used

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  • Preparing multistage adsorbent for difficult degradative organic wastewater in high concentration, and method of use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Carbonize pine needles at 100°C for 2 hours under anaerobic conditions to make a partially carbonized primary adsorbent;

[0021] 2) Put part of the carbonized primary adsorbent into the high-concentration organic wastewater, the mass volume ratio of the adsorbent to the high-concentration organic wastewater is 1:500, and after stirring, remove the high-concentration organic pollutants in the wastewater; after precipitation, recover and adsorb organic pollution The partially carbonized primary adsorbent was dried and further carbonized at 400°C for 2 hours to obtain a completely carbonized secondary adsorbent.

Embodiment 2

[0023] 1) Carbonize orange peel for 6 hours at 200°C under hypoxic conditions to make a partially carbonized primary adsorbent;

[0024] 2) Put part of the carbonized primary adsorbent into the high-concentration organic wastewater, the mass-volume ratio of the adsorbent to the high-concentration organic wastewater is 1:10000, and after stirring, remove the high-concentration organic pollutants in the wastewater; after precipitation, recover and adsorb organic pollution The partially carbonized primary adsorbent was dried and further carbonized at 700°C for 6 hours to obtain a completely carbonized secondary adsorbent.

Embodiment 3

[0026] 1) Carbonize the fruit shell for 4 hours at 150°C under anoxic conditions to make a partially carbonized primary adsorbent;

[0027] 2) Put part of the carbonized primary adsorbent into the high-concentration organic wastewater, the mass volume ratio of the adsorbent to the high-concentration organic wastewater is 1:800, and after stirring, remove the high-concentration organic pollutants in the wastewater; after precipitation, recover and adsorb organic pollution The partially carbonized primary adsorbent was dried and further carbonized at 600°C for 4 hours to obtain a completely carbonized secondary adsorbent.

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Abstract

The invention publishes a multistage absorbent preparation of the organic wastewater which is high potency and difficult to degrade, and its application method. The preparation method is as follows: 1) at 100 to 200deg.c., under the oxygen deficit condition, the nature biomass is carbonized for 2 to 6 hours, forming the primary absorbent with the part carbonizes; 2) inputting the primary absorbent of the part carbonized in the high potency organic wastewater, the quality volume ratio of the absorbent and the highly concentrated organic wastewater is 1:500 to 1:10000, after the agitation, removeing the organic pollutant which is at the high potency and difficult to degrade in the waste water; after the precipitation, recycling the primary absorbent of the part carbonize which adsorbs the organic pollutant, after drying, under 400 to 700deg.c. carrying on the further carbonize for 2 to 6 hours, preparing the secondary absorbent. The assignment action mechanism pretreats the organic wastewater which has the high potency and difficult to degrade;and simultaneously uses the strong surface adsorption mechanism of the secondary absorbent which is carbonized completely, the multistage absorbent is suitable to the adsorption treatment in polar and non-polar organic wastewater, and especially suitable to the adsorption treatment of high density organic wastewater in agricultural chemicals waste water, coked waste water and printing waste water and so on.

Description

technical field [0001] The invention relates to water treatment technology and application, in particular to a method for preparing and using a multi-stage adsorbent for high-concentration refractory organic wastewater. Background technique [0002] Since the 1950s, with the rapid development of the chemical industry, the types and quantities of artificially synthesized organic substances have increased day by day. Human beings have synthesized and produced 10 million chemicals, and more than 100,000 have entered the environment. Among them, persistent organic pollutants (POPs) widely exist in air, water, sediment, soil and other environments. Different from conventional pollutants, persistent organic pollutants are more harmful to human health and the natural environment. : It stays in the natural environment for a long time, is extremely difficult to degrade, and has strong toxicity, which can lead to global spread. After being ingested by organisms, it is not easy to de...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 陈宝梁周丹丹
Owner ZHEJIANG UNIV
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