Method for removing butyl p-hydroxybenzoate by activating persulfate with layered MoS2 and application thereof

A technology of butyl hydroxybenzoate and activated persulfate, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effect of easy storage and transportation, and great application prospects

Inactive Publication Date: 2019-09-10
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The literature search results show that: under the condition of no external energy, the use of layered MoS 2 The method of directly activating persulfate to remove BHB and its application have not been reported

Method used

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  • Method for removing butyl p-hydroxybenzoate by activating persulfate with layered MoS2 and application thereof
  • Method for removing butyl p-hydroxybenzoate by activating persulfate with layered MoS2 and application thereof
  • Method for removing butyl p-hydroxybenzoate by activating persulfate with layered MoS2 and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Layered MoS 2 Activation of PMS and PDS to remove BHB in water: prepare a BHB aqueous solution with a concentration of 5 mg / L, and adjust its pH to ~ 7.00. Measure 80 mL of BHB aqueous solution in a clean reaction bottle, add MoS after numbering 2 (1 g / L), PMS (5 mM) or PDS (5 mM), placed at room temperature (25±2°C) and stirred (300 rpm) for 180 min, and 2 mL water samples were taken at regular intervals for analysis.

Embodiment 2

[0024] (1) Investigation of the effect of different quenchers on layered MoS 2 Effect of activated PMS and PDS on removing BHB from water and analysis of active species: Prepare a BHB aqueous solution with a concentration of 5 mg / L and adjust its pH to ~ 7.00. Measure 80 mL of BHB aqueous solution in a clean reaction bottle, add MoS after numbering 2 (1 g / L), PMS (5 mM) or PDS (5 mM); no quencher was added to the control sample, and 0.5 M ethanol, 0.5 M tert-butanol, 1 mM histidine or 1 mM para Benzoquinone, then put it at room temperature (25±2°C) and stir (300rpm) for 180 minutes, and take 2mL water samples at regular intervals for analysis.

[0025] (2) Draw the obtained data into a graph, such as figure 2 Shown: 0.5 M ethanol and 0.5 M tert-butanol for MoS 2 The / PMS system showed an inhibitory effect on the removal of BHB, and the inhibitory effect of 0.5 M ethanol was stronger than that of 0.5 M tert-butanol, indicating that MoS 2 / PMS system exists SO 4 •‒ and •...

Embodiment 3

[0027] (1) To investigate the effect of different initial pH, PMS / PDS dosage and temperature on layered MoS 2 The effect of activating PMS and PDS on the removal of BHB from water: Prepare a BHB aqueous solution with a concentration of 5 mg / L and adjust its pH to 3-10. Measure 80 mL of BHB aqueous solution in a clean reaction bottle, add MoS after numbering 2 (1 g / L), PMS (2.5 ~ 7.5 mM) or PDS (2.5 ~ 7.5mM), then put it at room temperature (15 ~ 40 ℃) and stir (300 rpm) for 180 min, and take 2mL water samples at regular intervals. analyze. The analysis data shows that in the range of pH 3 ~ 10, after 180 min of reaction, more than 80% of BHB can be absorbed by MoS 2 / PMS and MoS 2 / PDS system oxidation removal; pH ≈ 7, when the dosage of PMS and PDS changes from 2.5 to 7.5 mM, the oxidation removal rate of BHB can reach more than 98% after 180 min; increasing the solution temperature is beneficial to MoS 2 / PMS and MoS 2 / PDS system quickly removes BHB in water.

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Abstract

The invention relates to a method for removing butyl p-hydroxybenzoate (BHB) by directly activating potassium peroxymonosulfate (PMS) and sodium persulfate (PDS) with layered MoS2. The method includespreparing a BHB target solution having a pH of 3-10 and a concentration of 5 mg / L; changing experiment conditions, adding a certain amount of commercial MoS2 and PMS / PDS to the BHB target solution respectively, and reacting the mixture under stirring. It is found for the first time that: the layered MoS2 can directly activate persulfate under a condition of no external energy and generate activefree radicals (SO<4><->., .OH and O<2><->.) and non-free radicals (1O2) to achieve synergistic oxidation to remove the BHB. The method is simple in process, easy to operate and low in equipment requirement, and the layered MoS2 is cheap and easily available, and has a wide market application potential in the field of treating newly-developing pollutants in water environment.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional layered chalcogenide materials and water pollution control, and relates to a method using layered MoS 2 Method and application of activating persulfate to remove butyl p-hydroxybenzoate. Background technique [0002] At present, as an emerging environmental pollutant, parabens (PBs) have attracted extensive attention from researchers at home and abroad. The world consumes about 8,000 tons of PBs every year, and most of the PBs are introduced into the environment during production, use and treatment; reports point out that PBs are widely detected in wastewater treatment plant effluent, surface water and sediments, so It is necessary to study the technology of PBs removal. Jing Zhang et al. (Environ. Sci. Technol. 47, 2013:13011) adopted Ru / CeO 2 Catalytic KMnO 4 Degradation of butylparaben (BHB) in water, experimentally confirmed Ru / CeO 2 Catalyzed KMnO 4 It has the ability to efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34
CPCC02F1/72C02F2101/34
Inventor 杨佳诚付明来祝敏平苑宝玲
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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