Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof

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, weak pollutant desorption capacity, secondary pollution, etc., and achieve good control effect

Active Publication Date: 2015-09-02
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

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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 an

Method used

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  • Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof
  • Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof

Examples

Experimental program
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Example Embodiment

[0051] Example 1:

[0052] A device for removing heavy metals and polycyclic aromatic hydrocarbons in river sediments, including an electrolysis device, a biofuel cell and a galvanometer, wherein the electrolysis device includes a cathode zone 1, a sediment zone 7 and an anode zone 2, from the left To the right are the cathode zone 1, the bottom sludge zone 7 and the anode zone 2 in order; the top of the cathode zone 1 and the top of the anode zone 2 are both provided with an air outlet 3, which is beneficial to the electrolysis device The gas exchange inside and outside ensures the stability of the pressure inside the electrolysis device, which is beneficial to promote the electrolyte solution to circulate at a stable rate. The upper side of the cathode zone 1 is connected to the electrolyte cup through a pipe, and the electrolyte cup passes through the pipe. Connected to the inlet of the peristaltic pump 13, and the outlet of the peristaltic pump 13 communicates with the lower ...

Example Embodiment

[0076] Example 2:

[0077] In view of the high content of heavy metals and PAHs pollutants in the sediments 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 sediments of the river are proposed. The device of this embodiment The structure and method are the same as in Example 1. Among them, the biosurfactant uses rhamnolipid, the concentration of rhamnolipid is 250mg / L, and the biosurfactant can also choose rhamnolipid, sophorolipid, soap Any one or a combination of keratin and subtilis; the pH value of the electrolyte solution is controlled to 6.1, and the flow rate of the electrolyte solution driven by the peristaltic pump 13 is 600 mL / h; The generated garbage, namely vegetable leaves, eggshells, peels and straws are broken, and mixed with wheat bran, rice bran, broken rice husks and bacterial culture materials after mixing, and then mix them evenly according to the mass rati...

Example Embodiment

[0078] Example 3:

[0079] Aiming at the high content of heavy metals and PAHs pollutants in the sediments 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 sediments of the river are proposed. The device of this embodiment The structure and method are the same as in Example 1. Among them, the biosurfactant chooses sophorolipid, the concentration of sophorolipid is 300mg / L, and the biosurfactant can also choose sophorolipid, rhamnolipid, and saponin It can be used in combination with any one or several of subtilis; the pH value of the electrolyte solution is controlled to 6.5, and the flow rate of the electrolyte solution driven by the peristaltic pump 13 is 700 mL / h; Garbage, namely vegetable leaves, egg shells, peels and straws are broken, and mixed with wheat bran, rice bran, crushed rice husks and bacterial culture materials in order according to the mass ratio of 105:3.5:3...

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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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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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