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Infiltration reaction wall composite material for underwater polyaromatic hydrocarbon pollution remediation as well as preparation method and application method of Infiltration reaction wall composite material

A technology for polycyclic aromatic hydrocarbons and pollution remediation, applied in water pollutants, contaminated groundwater/leachate treatment, chemical instruments and methods, etc., can solve problems such as insufficient oxygen supply and difficult control of carbon source release, and achieve long-term maintenance Carbon source, significant removal effect, and long-term effective removal effect

Active Publication Date: 2016-02-03
NANJING UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The present invention provides a permeable reaction wall for the restoration of polycyclic aromatic hydrocarbon pollution in groundwater, aiming at the problems that the existing repair methods for organic pollutants such as polycyclic aromatic hydrocarbons in groundwater easily cause the release of carbon sources to be difficult to control, and the oxygen supply in groundwater is insufficient. Composite material and its preparation method and application method. The PRB (permeable reactive wall) composite material adopts biochar that can release carbon source for a long time and stably, calcium peroxide that can keep the groundwater environment in a certain aerobic environment, and various inorganic Bonding, high permeability raw material compound formula, uniform spherical granulation, easy operation, good repeatability, environmental protection and pollution-free, small water resistance coefficient, good biocompatibility, no bypass flow, can efficiently and quickly remove polycyclic aromatic hydrocarbons other target pollutants

Method used

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  • Infiltration reaction wall composite material for underwater polyaromatic hydrocarbon pollution remediation as well as preparation method and application method of Infiltration reaction wall composite material
  • Infiltration reaction wall composite material for underwater polyaromatic hydrocarbon pollution remediation as well as preparation method and application method of Infiltration reaction wall composite material
  • Infiltration reaction wall composite material for underwater polyaromatic hydrocarbon pollution remediation as well as preparation method and application method of Infiltration reaction wall composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] It is a composite material for chemical and biological remediation of organically polluted groundwater. Its core is coconut shell biochar spherical particles, and its filling layer is composed of the following components by mass percentage: oxygen release agent calcium peroxide 15.85%, which mainly provides oxygen for microbial degradation of pollutants 31.7% of carbon-releasing raw material coconut shell biochar, mainly to maintain the carbon source required for microbial growth; 15.85% of plastic bonding raw material attapulgite, mainly to bond all raw materials and maintain a certain hardness; high permeability raw material silicon Alginate 6.6%, mainly to keep the composite material porous, which can release oxygen source and carbon source slowly; binder sodium alginate 29.98%. The shell has the function of covering and protecting, and is composed of the following components by mass percentage: 13.84% of ordinary portland cement for plastic bonding, 41.53% of attapul...

Embodiment 2

[0058] This embodiment is used for organically polluted groundwater chemical bioremediation composite material, basically the same as embodiment 1, the difference is: its inner core is peach kernel biochar spherical particles, the particle size is 0.5cm, and its material filling layer is composed of the following mass percentage Component composition: oxygen release agent calcium peroxide 15.09%; carbon release raw material peach pit biochar 30.19%; plastic bonding raw material attapulgite 15.09%; high permeability raw material diatomite 6.29%; binder sodium alginate 33.33%. The shell is composed of the following components in mass percentage: 13.39% of ordinary Portland cement as a plastic bonding material, 40.18% of attapulgite, 6.43% of diatomite as a high-permeability material, and 40% of sodium alginate as a binder. The particle diameters of the oxygen-releasing agent, carbon-releasing raw material, plastic bonding raw material, high-permeability raw material and sodium a...

Embodiment 3

[0071] The present embodiment is the same as Example 1, and its inner core is coconut shell biochar spherical particles, and its filling layer is made up of the following components by mass percentage: 15.50% of oxygen-releasing agent calcium peroxide; 31% of carbon-releasing raw material coconut shell biochar; plasticity The bonding raw material attapulgite is 15.50%; the high permeability raw material diatomite is 6.45%; the binder sodium alginate is 31.52%. The shell has the function of covering and protecting, and is composed of the following components by mass percentage: 13.6% of ordinary Portland cement as a plastic bonding material, 40.8% of attapulgite, 6.53% of diatomite as a high-permeability raw material, seaweed as an adhesive Sodium acid 38.07%. The particle diameters of the oxygen-releasing agent, carbon-releasing raw material, plastic bonding raw material, high-permeability raw material and sodium alginate used in the composite functional material of this embod...

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Abstract

The invention discloses an infiltration reaction wall composite material for underwater polyaromatic hydrocarbon pollution remediation as well as a preparation method and an application method of the infiltration reaction wall composite material, and belongs to the technical field of underwater remediation. The infiltration reaction wall composite material comprises a kernel, a packing layer and a shell, wherein the kernel is made of charcoal spherical granules; the packing layer comprises 15.09-15.85% of an oxygen release agent, 30.19-31.7% of a carbon release raw material, 15.09-15.85% of a plastic bonding raw material, 6.29-6.6% of a high infiltration raw material and the balance of an adhesive; the shell comprises 53.57-55.37% of a plastic bonding raw material, 6.43-6.64% of a high infiltration raw material and the balance of an adhesive. The infiltration reaction wall composite material is simple and convenient to operate, low in cost and good in repeatability, has effects of slowly releasing oxygen and carbon, is environment-friendly, free of pollution and small in round streaming, and has important significance in removing organic pollutants in underwater.

Description

technical field [0001] The invention relates to a technology for remediating polluted groundwater, and more specifically, relates to a permeable reactive wall composite material used for remediating groundwater polycyclic aromatic hydrocarbon pollution, as well as a preparation method and an application method thereof. Background technique [0002] Groundwater is the source of drinking water for human survival, but in the process of human industrialization and urbanization, the discharge of various organic wastewater, the infiltration of domestic sewage, the rupture of underground oil pipelines, and the release of pesticides and fertilizers in the process of agricultural production Extensive use has led to serious organic pollution of groundwater. The Ministry of Land and Resources launched a nationwide investigation and evaluation of groundwater pollution. The results show that the organic pollution of groundwater in the Pearl River Delta, the Yangtze River Delta, the Huaih...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F103/06C02F101/32
CPCY02W10/10
Inventor 郭红岩刘翠翠张庆泉季荣杜文超尹颖裴大平
Owner NANJING UNIV
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