Environmental remediation method for removing chlorohydrocarbon by catalyzing Fe(OH)2 through in-situ constructed bone black

An environmental repair and in-situ repair technology, applied in the field of environmental treatment, can solve the problems of vinyl chloride failing to degrade and have low chemical reduction activity, and achieve the effect of significant treatment effect, improved repair effect and easy realization.

Active Publication Date: 2021-03-02
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Fe(OH)2 alone has low chemical red...

Method used

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  • Environmental remediation method for removing chlorohydrocarbon by catalyzing Fe(OH)2 through in-situ constructed bone black
  • Environmental remediation method for removing chlorohydrocarbon by catalyzing Fe(OH)2 through in-situ constructed bone black
  • Environmental remediation method for removing chlorohydrocarbon by catalyzing Fe(OH)2 through in-situ constructed bone black

Examples

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Embodiment 1

[0050] combine figure 1 As shown, the in situ construction bone char provided by the invention catalyzes Fe(OH) 2 An environmental restoration method for removing chlorinated hydrocarbons, comprising the steps of:

[0051] (1) After crushing animal bone waste, in N 2 Anaerobic pyrolysis at 800°C for 2 hours in the atmosphere to obtain bone char particles; then add 1 g of bone char particles to 100 mL of deoxygenated deionized water, and mix evenly by ultrasonic to obtain a bone char suspension with a concentration of 10 g / L;

[0052] (2) Simulated application environment: inject 50 μL of the organic pollutant trichlorethylene stock solution with a concentration of 4 mmol / L into the sample bottle pre-added with 3 mL of deionized water, that is, this example uses the trichlorethylene stock solution as an example to simulate organic pollutants polluting groundwater situation;

[0053](3) In the sample bottle of step (2), add 1 mL of bone charcoal suspension with a concentratio...

Embodiment 2

[0060] combine figure 2 As shown, the present invention provides another in situ construction of bone char catalyzed Fe(OH) 2 An environmental remediation method for removing chlorinated hydrocarbons, that is, bone char and Fe(OH) 2 Mixed Preparation of Bone Charcoal Catalyzed Fe(OH) 2 Composite repair materials, and then bone char catalyzed Fe(OH) 2 Composite restoration materials are poured into polluted soil and groundwater, which specifically includes the following steps:

[0061] (1) After crushing animal bone waste, in N 2 Anaerobic pyrolysis at 800°C for 2 hours in the atmosphere to obtain bone char particles; then add 1 g of bone char particles to 100 mL of anaerobic deionized water, and mix evenly by ultrasonic to obtain a bone char suspension with a concentration of 10 g / L;

[0062] (2) Simulated application environment: Inject 50 μL of the organic pollutant trichlorethylene stock solution with a concentration of 4 mmol / L into a sample bottle pre-added with 9 mL...

Embodiment 3

[0068] The in situ construction bone char provided by the invention catalyzes Fe(OH) 2 An environmental restoration method for removing chlorinated hydrocarbons, comprising the steps of:

[0069] (1) After crushing animal bone waste, in N 2 Anaerobic pyrolysis at 800°C for 2 hours in the atmosphere to obtain bone char particles; then the bone char particles were added to 1mol / L HCl solution for extraction and pickling, and solid-liquid separation; the acid-washed bone char particles were washed with deionized water until neutral, and Dry at 60°C for 11 hours to obtain acid-treated bone char particles; add 1 g of acid-treated bone char particles to 100 mL of oxygen-free deionized water, and mix evenly by ultrasonic to obtain an acid-treated bone char suspension with a concentration of 10 g / L;

[0070] (2) Simulated application environment: inject 50 μL of organic pollutant trichlorethylene stock solution with a concentration of 4 mmol / L into a sample bottle pre-added with 3 mL...

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Abstract

The invention relates to the technical field of environmental governance, in particular to an environmental remediation method for removing chlorohydrocarbon by catalyzing Fe(OH)2 through in-situ constructed bone black. The method comprises the following steps of pouring a bone black suspension, a bivalent ferric salt solution and an alkaline solution into a target contaminated site, or mixing thebone black suspension, the bivalent ferric salt solution and the alkaline solution to obtain a bone black catalyzed Fe(OH)2 composite remediation material, pouring the bone black catalyzed Fe(OH)2 composite remediation material into the target contaminated site, constructing a bone black catalyzed Fe(OH)2 reaction system in situ, and carrying out in-situ remediation. According to the method, chlorohydrocarbon in soil and underground water is subjected to reductive dechlorination degradation by using a bone black catalyzed Fe(OH)2 reaction system, the remediation system is simple and effective, the chlorohydrocarbon can be quickly dechlorinated and degraded, and the removal efficiency is high; the method is used for in-situ remediation, has a good mass transfer effect, has no special limitation on an application method, is easy to implement, is slightly influenced by temperature and pH in the reaction process, and has a wide application range, so that the method has higher popularization value.

Description

technical field [0001] The invention relates to the technical field of environmental governance, in particular to an in-situ construction of bone char to catalyze Fe(OH) 2 Environmental remediation methods for the removal of chlorinated hydrocarbons. Background technique [0002] With the acceleration of urbanization, many chemical companies originally located in urban areas were forced to move out of the city center, leaving behind a large number of polluted sites, and the problem of organic pollution in soil and groundwater pollution is more prominent. Among them, chlorinated hydrocarbons such as trichlorethylene (TCE) and tetrachlorethylene (PCE) are frequently detected in groundwater and soil of polluted sites in various places. Most of these pollutants have potential "three causes" (carcinogenic, teratogenic, mutagenic) hazards. Chlorinated solvents have low water solubility and long migration distances, which aggravate the pollution of groundwater and soil, making tr...

Claims

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Application Information

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IPC IPC(8): C02F1/70B09C1/00B09C1/08C02F103/06C02F101/36
CPCC02F1/70B09C1/002B09C1/08C02F2103/06C02F2101/36
Inventor 殷炜昭熊淑婷赵锦欣
Owner JINAN UNIVERSITY
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