Thiophene adsorbents and application thereof

A technology of adsorbent and thiophene, which is applied to the purification treatment agent for removing thiophene in aqueous solution and its treatment field, can solve the problems of unsatisfactory treatment effect, complicated process and high treatment cost, and achieves significant practical value, strong adsorption effect, and solution Effects of pollution problems

Active Publication Date: 2010-11-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some scholars have tried many methods in order to deal with sulfur-containing wastewater, such as oxidative decomposition (Environ.Sci.Technol., 2003, 37:452), activated carbon adsorption (Trans.IChemE B, 2007, 85:521), wet method Oxidation method (JP 8

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] Accurately weigh 23.800g of Zn(NO 3 ) 2 .6H 2 O, 15.005g of Al (NO 3 ) 3 .9H 2 O, and 23.070g of sodium dodecyl sulfate (SDS) were placed in a beaker, 400mL of distilled water was added, stirred to dissolve completely, and then transferred to a 1000mL three-necked flask. 2M NaOH solution was added dropwise to maintain the pH at 7, the temperature was controlled at 30°C, and the crystallization time was 12h. Finally, centrifugal filtration and vacuum drying can obtain the desired product, which is denoted as SDS-ZnAl-LDH.

[0018] In a 1000mL reaction vessel, measure 500mL of a solution with a thiophene concentration of 800mg / L, a water bath at a constant temperature of 25°C, PH=6.33, and add 1.2g of SDS-Zn 2 Al 1 -LDH, stirring for 6 hours, extracting a certain amount of reaction solution, filtering to obtain the supernatant, measuring the remaining content of thiophene, and calculating the adsorption rate of 74.74%.

Example Embodiment

[0019] Example 2

[0020] Accurately weigh 23.800g Zn(NO 3 ) 2 .6H 2 O and 15.005g Al (NO 3 ) 3 .9H 2 Put O in a beaker, add 200 mL of deionized water, stir to dissolve it completely, record it as solution A; accurately weigh 8.479 g of Na 2 CO 3 Put 7.680g NaOH in a beaker, add 200mL deionized water, stir to dissolve it completely, and record it as solution B. The A and B solutions were quickly mixed in the rotating liquid film nucleation reactor, vigorously circulated and stirred for 2 min, then the slurry was crystallized at 80 °C for 24 h, and finally centrifuged and dried to obtain the desired product, denoted as ZnAL-CO 3 -LDH.

[0021] In a 1000mL reaction vessel, measure 500mL of a solution with a thiophene concentration of 800mg / L, a water bath at a constant temperature of 25°C, pH=6.33, add 1.2g Zn 2 AL 1 -CO 3 -LDH, stir for 5h, extract a certain amount of reaction solution, filter to obtain the supernatant, measure the remaining content of thiophene, and...

Example Embodiment

[0022] Example 3

[0023] In a 100mL conical flask, measure 100mL of a solution with a thiophene concentration of 800mg / L, control the temperature at 25°C, pH=6.33, add 0.4g of SDS-ZnAl-LDH prepared in Example 1, stir for 5h, and filter to obtain the upper layer In the clear night, the residual content of thiophene was measured, and the adsorption rate was calculated to be 82.84%.

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PUM

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Abstract

The invention provides thiophene adsorbents and a purification method for treating thiophene-containing wastewater by the same, and belongs to the technical field of water treatment. The thiophene adsorbents are a layered double hydroxide (ZnAL-CO3-LDH) and a modified product thereof (SDS-ZnAl-LDH). Experiments show that the two layered adsorbents have the thiophene removing rate of over 74 percent respectively. For example, under the meta-acid condition, the SDS-ZnAl-LDH has the thiophene removing rate of over 90 percent. The layered double hydroxide and the modified product thereof are applied to adsorbing the thiophene-containing wastewater, and can effectively remove the thiophene in the wastewater, so the invention provides feasible high-efficiency adsorbents for treating the thiophene-containing wastewater, which has valuable significance for purifying the thiophene-containing wastewater and protecting the environment.

Description

technical field [0001] The invention belongs to the technical field of water treatment and provides a purification treatment agent for removing thiophene in aqueous solution and a treatment method thereof. Background technique [0002] Thiophene exists in many wastewaters, such as coking wastewater, oil extraction and refining wastewater, dye industry wastewater, pharmaceutical industry wastewater and resin industry wastewater. Thiophene is a biologically toxic organic sulfide, which can synergistically enhance with other organic pollutants to increase its toxicity. If it is directly discharged into water without treatment, it will cause great harm to the environment. [0003] Thiophene is the most stable five-membered heterocyclic compound containing one heteroatom. At present, the removal of thiophene in industrial applications mainly adopts adsorption, extraction and other means. Some scholars have tried many methods in order to deal with sulfur-containing wastewater, su...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/22B01J20/30C02F1/28C02F101/30
Inventor 雷晓东赵强孙晓明张法智段雪
Owner BEIJING UNIV OF CHEM TECH
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