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A device and method for removing heavy metals and polycyclic aromatic hydrocarbons in river sediment

A technology for polycyclic aromatic hydrocarbons and river sediment, applied in the field of river pollution control, can solve problems such as large engineering volume, secondary pollution, and power consumption, and achieve good control effects

Active Publication Date: 2017-03-01
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of power consumption, poor desorption capacity of pollutants, secondary pollution caused by active surface agents, poor treatment effect and large engineering workload in the pollution treatment of river channel sediment in the prior art, the present invention provides a The device and method for removing heavy metals and polycyclic aromatic hydrocarbons in river bottom mud can effectively remove heavy metals and polycyclic aromatic hydrocarbons in river bottom mud, and has strong desorption capacity of pollutants, no secondary pollution, good treatment effect, and saves Energy for waste reuse

Method used

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  • A device and method for removing heavy metals and polycyclic aromatic hydrocarbons in river sediment
  • A device and method for removing heavy metals and polycyclic aromatic hydrocarbons in river sediment

Examples

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Embodiment 1

[0052] A device for removing heavy metals and polycyclic aromatic hydrocarbons in river sediment, including an electrolysis device, a biofuel cell and a galvanometer, wherein the electrolysis device includes a cathode area 1, a bottom mud area 7 and an anode area 2, from the left To the right are the cathode area 1, the bottom mud area 7 and the anode area 2; the top of the cathode area 1 and the top of the anode area 2 are provided with a gas outlet 3, and the gas outlet is arranged to facilitate the electrolysis device The internal and external gas exchange ensures the stability of the internal pressure of the electrolysis device, which is conducive to promoting the electrolyte solution to circulate at a stable rate. The upper side of the cathode area 1 communicates with the electrolyte cup through a pipeline, and the electrolyte cup passes through a pipeline. Connected to the inlet of the peristaltic pump 13, the outlet of the peristaltic pump 13 communicates with the lower ...

Embodiment 2

[0077] Aiming at the high content of heavy metals and PAHs pollutants in the bottom mud of a certain river in Anhui, in order to remove the pollutants, a device and method for removing heavy metals and polycyclic aromatic hydrocarbons in the bottom mud of the river are proposed. The device of this embodiment Structure and method thereof are the same as in Example 1, wherein the biosurfactant selects rhamnolipid, and the concentration of rhamnolipid is 250mg / L, and the biosurfactant can also select rhamnolipid and sophorolipid, soap Any one or several combinations of keratin and subtilis; the pH value of the electrolyte solution is controlled to be 6.1, and the flow rate of the electrolyte solution driven by the peristaltic pump 13 is 600mL / h; The generated garbage, that is, vegetable leaves, eggshells, fruit peels and straws are crushed, mixed with wheat bran, rice bran, broken rice husks and bacterial culture material, and mixed evenly according to the mass ratio of 100:3:3:10...

Embodiment 3

[0079] In view of the high content of heavy metals and PAHs pollutants in the sediment of a certain river in Hubei, in order to remove the pollutants, a device and method for removing heavy metals and polycyclic aromatic hydrocarbons in the river sediment are proposed. The device of this embodiment The structure and method thereof are the same as in Example 1, wherein the biosurfactant is selected to use sophorolipids, and the concentration of sophorolipids is 300 mg / L. Biosurfactants can also select sophorolipids, rhamnolipids, and saponins Use in combination with any one or several types of Bacillus subtilis; the pH value of the electrolyte solution is controlled to be 6.5, and the flow rate of the electrolyte solution driven by the peristaltic pump 13 is 700mL / h; Garbage, that is, vegetable leaves, eggshells, fruit peels and straws are broken, mixed with wheat bran, rice bran, broken rice husks and bacterial culture material, and mixed in sequence according to the mass ratio...

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Abstract

The invention relates to a device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and a method thereof and belongs to the field of river-channel pollution treatment in environmental protection. The device comprises an electrolysis device, a biological fuel cell and a galvanometer, wherein the electrolysis device comprises a cathode area, a bottom-sediment area and an anode area; the negative electrode of the biological fuel cell is arranged at the outer side of a round drum, the positive electrode of the biological fuel cell is arranged at the inner side of the round drum, and a compost layer is arranged between the negative electrode and the positive electrode; a cathode rod is arranged in the cathode area, the top part of the cathode rod is electrically connected with the positive electrode, the negative electrode is connected with one end of the galvanometer, and the other end of the galvanometer is electrically connected with a positive rod; a substance exchange film is arranged between the anode area and the bottom-sediment area, a substance exchange film is also arranged between the bottom-sediment area and the cathode area, the top part of a cathode sampling area is provided with a cathode sampling port, the top part of a middle sampling area is provided with a middle sampling port, and the top part of an anode sampling area is provided with an anode sampling port. The device and the method have the advantages that the energy is saved and simultaneously the purpose of using wastes to treat wastes is achieved.

Description

technical field [0001] The invention belongs to the field of river channel pollution control in environmental protection, and in particular relates to a device and method for removing heavy metals and polycyclic aromatic hydrocarbons in river channel bottom mud. Background technique [0002] With the development of the economy and the acceleration of the urbanization process, environmental problems have become increasingly serious, and water pollution has been paid more and more attention. The problem of river pollution is mainly manifested in the high content of N and P elements, the serious eutrophication of the water body, the excessive content of heavy metal elements in the water body, and the increasing proportion of refractory organic pollutants in the water body, seriously disrupting the water quality and biodiversity of rivers. sexual balance. The cause of river pollution is due to the discharge of exogenous pollutants (nitrogen, phosphorus, heavy metals, refractory...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C05F15/00C02F101/20C02F101/32
Inventor 孔明张毅敏赵玉坤彭福全巫丹杨飞
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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