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2, 4, 6-trichlorophenol adsorbing agent and application thereof

A technology of trichlorophenol and adsorbent, which is applied in the application field of 2,4,6-trichlorophenol, can solve the problem that the application of 2,4,6-trichlorophenol has not been reported in literature, etc., and achieves optimized adsorption conditions , high adsorption performance, the effect of high-efficiency adsorption materials

Inactive Publication Date: 2015-01-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the application of dodecylbenzenesulfonate modified hydrotalcite as an adsorbent to remove 2,4,6-trichlorophenol in wastewater has not been reported in the literature.

Method used

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  • 2, 4, 6-trichlorophenol adsorbing agent and application thereof
  • 2, 4, 6-trichlorophenol adsorbing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of Zn 2 Al-SDBS-LDH

[0024] Put 5.2272g of sodium dodecylbenzenesulfonate, 5.9498g of zinc nitrate and 3.7513g of aluminum nitrate into a four-necked bottle and add 2 Make a solution in deionized water. in N 2 Under protection and stirring conditions, 2 mol of sodium hydroxide was added dropwise to keep the pH value of the solution at 10±0.2, crystallized at 80°C for 9 hours, and dried by centrifugation to obtain Zn 2 Al-SDBS-LDH.

[0025] Measure 50mL of 2,4,6-trichlorophenol solution with a concentration of 300mg / L in a conical flask, add 0.03g of Zn prepared above at 25°C 2 Al-SDBS-LDH, magnetically stirred and a small amount of reaction solution was extracted regularly from 10 minutes, filtered to obtain the supernatant, and the remaining content of 2,4,6-trichlorophenol was measured with a UV-visible spectrophotometer at a wavelength of 290nm. see results figure 1 ,Depend on figure 1 It can be seen that the adsorption equilibrium was reached in ...

Embodiment 2

[0027] Preparation of Zn 2 Al-SDS-LDH

[0028] Put 4.3257g of sodium lauryl sulfate, 5.9498g of zinc nitrate and 3.7513g of aluminum nitrate into a four-necked bottle and add 300mL to remove CO 2 Make a solution in deionized water. in N 2 Under protection and stirring conditions, 2 mol of sodium hydroxide was added dropwise to keep the pH value of the solution at 10±0.2, crystallized at 80°C for 9 hours, and dried by centrifugation to obtain Zn 2 Al-SDS-LDH.

[0029] Measure 50mL of 2,4,6-trichlorophenol solution with a concentration of 300mg / L and place it in a conical flask, add 0.03g of Zn prepared above at 25°C 2 Al-SDS-LDH, magnetically stirred and a small amount of reaction solution was extracted regularly from 10 minutes, filtered to obtain the supernatant, and the remaining content of 2,4,6-trichlorophenol was measured with a UV-visible spectrophotometer at a wavelength of 290nm. see results figure 2 ,Depend on figure 2 It can be seen that the adsorption equil...

Embodiment 3

[0031] Measure 50mL of 2,4,6-trichlorophenol solutions with a concentration of 300mg / L and place them in three conical flasks respectively. At 25°C, put 0.03g of the Zn 2 Al-SDBS-LDH, use HCl to adjust the pH value in the bottle respectively, so that the pH of the solution is 3, 4, 5 in turn, stir magnetically, take a sample after 2 hours and filter it with a 0.22 μm filter head to obtain the supernatant, and measure it by UV-visible spectrophotometry Measure the remaining content of 2,4,6-trichlorophenol at a wavelength of 290nm, and the results show that when the solution pH=3,4,5, Zn 2 The adsorption capacities of Al-SDBS-LDH for 2,4,6-trichlorophenol were 160mg / g, 142.16mg / g, and 137.15mg / g, respectively.

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Abstract

The invention provides a purpose of modified hydrotalcite based on dodecyl benzene sulfonate and lauryl sulfate, and particularly relates to an adsorbing agent used for adsorbing 2, 4, 6-trichlorophenol in a wastewater solution. According to modified hydrotalcite, with sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS) as a modifying agent, modified Zn2Al-LDHs is prepared and obtained by a co-precipitation method, the adsorbing agent has larger laminated plate spacing compared with the adsorbing agent before modification, and the hydrophilic surface becomes hydrophobic after modified. The adsorbing agent adsorbs 2, 4, 6-trichlorophenol and reaches adsorbing balance after 2-3 hours under the conditions that the pH value is 3-5 and the temperature is 25-35 DEG C; the adsorbing capacity reaches 100-160mg / g, and the adsorption rate reaches 70-83%. The adsorbing agent is applicable to 30-300mg / L wastewater solution containing 2, 4, 6-trichlorophenol and has the characteristics that the price is low, the adsorbing capacity is large and the adsorbing process is simple and convenient and is easy to operate and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the application of dodecylbenzenesulfonate and dodecylsulfate modified hydrotalcite as an adsorbent to remove 2,4,6-trichlorophenol in wastewater. Background technique [0002] 2,4,6-Trichlorophenol is widely present in papermaking, petrochemical, pesticide and other waste waters. It is one of the most toxic chlorophenol compounds because of the three chlorine atoms attached to the phenolic ring. Persistent organic pollutants have strong carcinogenic, teratogenic and mutagenic effects, so the research on the treatment of wastewater containing 2,4,6-trichlorophenol is very important. [0003] At present, the industrial removal of 2,4,6-trichlorophenol mainly includes adsorption, incineration, extraction and other means. There are many methods for treating wastewater containing 2,4,6-trichlorophenol during the experiment. Adsorption is a commonly used method for removing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/58
CPCB01J20/22B01J20/305B01J2220/42C02F1/288C02F1/58C02F2101/345
Inventor 雷晓东赵培雯李芳刘晓华田维亮
Owner BEIJING UNIV OF CHEM TECH
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