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Groundwater pollution remediation technology for multiple-row column form PRBs (Permeable Reactive Barrier) in annular structures

A groundwater pollution, annular structure technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited operating life, lack of typical structural forms, etc. Long, reduce filler dosage, strengthen the effect of repair effect

Inactive Publication Date: 2010-11-10
王鹤立
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the traditional PRB technology in the restoration of polluted groundwater around the water source area, such as the lack of typical structural forms and its limited operating life, the present invention provides a groundwater pollution supplemented by phytoremediation with a new model, cost-effective, and no secondary pollution. In-situ remediation technology—multi-row columnar annular structure PRB groundwater pollution remediation technology

Method used

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  • Groundwater pollution remediation technology for multiple-row column form PRBs (Permeable Reactive Barrier) in annular structures
  • Groundwater pollution remediation technology for multiple-row column form PRBs (Permeable Reactive Barrier) in annular structures
  • Groundwater pollution remediation technology for multiple-row column form PRBs (Permeable Reactive Barrier) in annular structures

Examples

Experimental program
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Effect test

Embodiment 1

[0028] see Figure 4 to Figure 6 : The thickness of the aquifer layer in this area is 9.5m, mainly composed of sand and gravel, and the particle size is less than 0.25mm, which is a homogeneous aquifer. With the catchment area (1) of the water source as the center, a PRB system with a three-ring structure is constructed, and activated carbon particles with a particle size of 0.5-1mm, zero-valent iron particles with a particle size of 0.5-1mm, and zero-valent iron particles with a particle size of 0.5 mm are filled from the inside to the outside. -1mm zero valent iron particles.

[0029] The groundwater flow rate is 0.7m / d, and the raw water quality: pH is 7.4, ORP is 81mV, Cr(IV) concentration is 0.853mg / L, PCBs (polychlorinated biphenyls) concentration is 1.956mg / L.

[0030] After the system is running stably, the treatment effect on Cr(IV) and PCBs is good, the average removal rate is 97% and 96% respectively, and the effluent water quality meets the standard of Class III w...

Embodiment 2

[0032] see Figure 7 to Figure 9 : The thickness of the aquifer in this area is 9m, mainly composed of sand and gravel, with a particle size of <0.25mm; in some sections, there is a large range of impermeable areas, mainly clay granular layers, with a thickness of up to 5m; layer is a heterogeneous aquifer. With the catchment area (1) of the water source as the center, a PRB system with a three-ring structure is constructed. The packing column is filled with zero-valent iron particles with a particle size of 0.5-1mm, and the packing column located in the impermeable area (10) is defaulted.

[0033] The groundwater flow rate is 1m / d, and the raw water quality: the total Mn concentration is 0.8mg / L, and the Fe(II) concentration is 0.9mg / L.

[0034] After the system runs stably, the treatment effect on the total Mn and Fe(II) is good, the average removal rate is 89% and 70% respectively, and the effluent water quality meets the standard of Class III water body in the "Groundwate...

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Abstract

The invention provides a groundwater pollution remediation technology for multiple-row column form PRBs (Permeable Reactive Barrier) in annular structures. A system constructed by the technology is made of filled columns which pass through aquifers and are distributed discontinuously, and clear water plants with developed root systems can be grown in soil layers above the filled columns. The system is distributed in an annular space, can be in multi-ring arrangement and is further provided with a spare reaction zone in addition to a main reaction zone. The technology solves the problems that the traditional PRB technology medium is difficultly updated and has potential hazard after becoming invalid, and the like, prolongs service life of the system under the premise of saving construction and maintaining cost, and synchronously and fully utilizes advantages of a phytoremediation technology so as to enhance the operational efficiency of the PRB system. The technology is suitable for eliminating single or compound pollutants in homogeneous aquifers or inhomogeneous aquifers.

Description

technical field [0001] The invention relates to a PRB groundwater pollution restoration technology with a multi-row columnar annular structure, which belongs to the technical field of groundwater restoration and can economically and effectively restore polluted groundwater without secondary pollution. Background technique [0002] Groundwater is an important source of water for my country's industrial and agricultural production and people's lives. From 2002 to 2004, the National Water Resources Comprehensive Planning Project conducted a comprehensive evaluation of the quality of groundwater resources in my country's vast plains for the first time. The results showed that: in addition to natural poor-quality water, my country's groundwater pollution is also very serious. Nearly 25% of the country's plains The area has been polluted to varying degrees. Affected by the development of metal mining and smelting, chemical industry, printing and dyeing and other industries, ground...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 井柳新王鹤立申亮
Owner 王鹤立
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