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Material for remediation of groundwater petroleum contamination and preparation method thereof

A technology for petroleum hydrocarbons and groundwater, applied in the direction of water pollutants, contaminated groundwater/leachate treatment, chemical instruments and methods, etc., to achieve the effects of cost reduction, long service life and low cost

Active Publication Date: 2016-10-19
ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to not only absorb petroleum hydrocarbon pollutants, but also strengthen the restoration of microorganisms, and provide a material for repairing petroleum hydrocarbon pollution in groundwater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix cement, fine sand and sodium alginate according to the mass ratio of 1:0.2:1 to prepare a stable and solidified adhesive, which is reserved for later use. Take 400g of stable curing adhesive, 400g of sepiolite, 500g of medical stone and 200g of zero-valent iron and mix fully and evenly, spray quantitative water to make the mixture wet, put the mixture into extrusion tumbling granulator for granulation, and Set the extrusion speed to 50r / min, place it to dry under natural ventilation conditions, and the particles with a particle size of 0.8cm account for 85%. Put 200g of iron dissimilation reducing bacteria agent into sterile water and dilute it into a suspended bacterial liquid, and then the obtained The microsphere particles are immersed in the bacterial solution for 24 hours, and dried in the air at low temperature to obtain the desired material. This material is the PRB filling material used to remediate petroleum hydrocarbon pollution in groundwater.

[0034] T...

Embodiment 2

[0036]Mix cement, fine sand and bentonite according to the mass ratio of 1:0.24:0.5 to prepare a stable and solidified adhesive, which is reserved for later use. Take 260kg of stable curing adhesive, 230kg of sepiolite, 280kg of medical stone and 150kg of zero-valent iron and mix them fully and evenly, spray quantitative water to make the mixture wet, put the mixture into an extrusion tumbling granulator for granulation, and The extrusion speed was set at 40r / min, placed to dry under natural ventilation, and the particles with a particle size of 1 cm accounted for 90%. Dilute 130kg of iron dissimilation reducing bacteria agent with sterile water to make suspension bacteria liquid, soak the granulated microspheres for 20 hours, take them out and dry them in the air. This material is the PRB filling material for repairing petroleum hydrocarbon pollution in groundwater.

[0037] The porosity of the material is determined to be 30%-35%, and the particle strength is about 30N. The...

Embodiment 3

[0039] Compared with Example 1, the only difference is that in this example, cement, fine sand and bentonite are mixed according to the mass ratio of 1:0.22:0.8 to prepare a stable and solidified adhesive for later use. Take 240g of stable curing adhesive, 300g of sepiolite, 120g of iron dissimilation reducing bacteria, 300g of medical stone and 120g of zero-valent iron and mix them fully and evenly.

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PUM

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Abstract

The invention discloses a material for remediation of groundwater petroleum contamination. The material is prepared from the following components by weight: 10-30 parts of a stable curable adhesive, 20-35 parts of an adsorbent and microbial carrier material, 10-20 parts of iron dissimilation reducing bacteria, 25-35 parts of a nutrient and 10-20 parts of biological enhanced substance. The invention also discloses a preparation method of the material. The material of the invention can adsorb petroleum hydrocarbon pollutants, also strengthen the microbes for degradation of petroleum hydrocarbons, so as to achieve a dynamic ''adsorption- degradation-adsorption'' equilibrium state, improve the service life of the material. The material has the capability of long-term remediation of groundwater and also reduce the cost of remediation.

Description

technical field [0001] The invention relates to the technical field of groundwater pollution restoration, and more specifically relates to a material for repairing petroleum hydrocarbon pollution in groundwater and a preparation method thereof. Background technique [0002] At present, the problem of groundwater pollution in my country is very prominent. A large number of man-made pollutants enter the groundwater environment through various channels, especially the continuous increase of petroleum hydrocarbon pollutants in groundwater, which aggravates the deterioration of groundwater quality. The main components of petroleum hydrocarbons are aromatic hydrocarbons and saturated hydrocarbons. Among them, BTEX is a kind of single-ring aromatic hydrocarbon compounds that are easily soluble in water and volatile, including benzene, toluene ), ethylbenzene and xylenes. Due to the leakage of oil storage tanks and the discharge of waste from the petroleum industry, especially the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/32C02F103/06
Inventor 魏文侠宋云程言君王海见李培中杨苏才
Owner ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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