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Method for removing organic pollutants by activating persulfate with diatomite composite material loaded with iron and manganese

A technology for activating persulfate and organic pollutants, applied in the field of environmental remediation, can solve the problems of serious energy consumption, difficult to recycle, uneconomical, etc., and achieve the effects of strong activation performance, low cost, enhanced load capacity and stability

Active Publication Date: 2022-04-12
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, the method of this patent requires multiple calcinations, especially at a temperature above 1400°C, and the energy consumption is serious; moreover, although the materials obtained in this patent can be recovered through magnetic methods, they are difficult to recycle and are not economical

Method used

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  • Method for removing organic pollutants by activating persulfate with diatomite composite material loaded with iron and manganese

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037](S1) 100 parts of diatomite were soaked in 10wt% dilute hydrochloric acid for 1 hour under stirring conditions, centrifuged, and dried to complete the pretreatment of diatomite. The pretreated diatomite was impregnated in 200 parts of In the ethanol solution of 2wt% KH-580, soak for 5h, take out, wash with water, dry to obtain the diatomite modified by mercaptosilane coupling agent; the modified diatomite is impregnated in 300 parts of Fe(NO 3 ) 2 and MnCl 2 In the mixed solution of Fe(NO 3 ) 2 The molar concentration is 0.2mol / L, MnCl 2 The molar concentration is 0.04mol / L, add 100 parts of 30wt% ammonia water, stir to form a slurry, after drying, wash twice with deionized water, then wash twice with ethanol, dry, grind and sieve to obtain an average particle size of about 120 μm diatomite composite material loaded with iron and manganese;

[0038] (S2) In a brown reagent bottle with 100 mL of 200 μM chlorobenzene, 1 g of the diatomite composite material loaded wit...

Embodiment 2

[0040] Other conditions and operation are identical with embodiment 1, difference is in step (S1), Fe(NO 3 ) 2 The molar concentration is 0.24mol / L, MnCl 2 The molar concentration is 0.03mol / L.

Embodiment 3

[0042] Other conditions and operation are identical with embodiment 1, difference is in step (S1), Fe(NO 3 ) 2 The molar concentration is 0.24mol / L, MnCl 2 The molar concentration is 0.02mol / L.

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Abstract

The invention relates to a method for removing organic pollutants by activating persulfate with a diatomite composite material loaded with iron and manganese, which comprises the following steps: (S1) modifying pretreated diatomite with a sulfydryl silane coupling agent, impregnating the modified diatomite in a mixed solution of ferrite and manganese salt, adding an alkaline solution, stirring to obtain slurry, drying the slurry, washing, and drying again to obtain a diatomite composite material loaded with iron and manganese; grinding to obtain a diatomite composite material loaded with iron and manganese; and (S2) adding a persulfate aqueous solution and the composite material obtained in the step (S1) into a water body or soil to be repaired, and fully mixing, so that organic pollutants in an object to be repaired are degraded and removed. The composite material prepared by the invention can efficiently activate persulfate and quickly degrade refractory organic matters in a to-be-repaired system. The method disclosed by the invention is green, safe, environment-friendly and low in cost, does not need to additionally implement measures such as heating and light irradiation, and saves energy and related equipment.

Description

technical field [0001] The invention relates to the field of environmental restoration, in particular to a method for removing organic pollutants by activating persulfate with diatomite composite materials loaded with iron and manganese. Background technique [0002] In recent years, the problem of soil and water pollution in my country has gradually become prominent, which has attracted people's attention. It is reported that the shallow groundwater in most cities in my country has suffered varying degrees of organic pollution. There are hundreds of thousands of sites that have been shut down and relocated, most of which have organic pollution in the soil and groundwater. At the same time, some chemical companies discharge wastewater Contains a certain amount of organic pollutants. The economic and rapid removal of organic pollution in these pollutions is the focus and difficulty of restoration work. [0003] In recent years, the oxidation technology based on activated per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B09C1/08C02F101/30
Inventor 张传兵姜凤成王明仕王慧芳徐亚慧邱瑶郭永正陆兆华胡进林
Owner 华夏碧水环保科技股份有限公司
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