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Stabilizing method of heavy metal polluted bottom mud and application of stabilizing method

A technology of polluting sediment and stabilizing methods, which is applied in the field of ecological environment management, to achieve obvious stabilization effects, reduce leachable components, and benefit crop growth

Inactive Publication Date: 2014-06-11
ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the lack of ex-situ treatment technology and agricultural resource utilization technology for heavy metal polluted river sediment after dredging, the purpose of the present invention is to provide a method for stabilizing heavy metal polluted sediment and its application

Method used

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  • Stabilizing method of heavy metal polluted bottom mud and application of stabilizing method

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Embodiment 1

[0031] Embodiment 1 is carried out the processing method of stabilizing the heavy metal polluted bottom mud after dredging

[0032] Firstly, the dredged bottom mud from a river pond in Xinpo Town, Haikou City was naturally dehydrated and paved, then dried and dehydrated naturally, and evenly spread on the surface of the farmland, with a thickness of 15cm on the farmland.

[0033] Uniformly spread stabilizer on the heavy metal polluted bottom mud on the above-mentioned farmland, the stabilizer includes sepiolite and calcium dihydrogen phosphate, the sepiolite (purchased from Hebei Yixian Hongkeweili sepiolite factory, specifications 100 mesh) and calcium dihydrogen phosphate (purchased in Fuquan Hongliang Chemical Co., Ltd., total P≥22.0%) in a mass ratio of 10:1, and 1.5 parts by weight of stabilizer per 100 parts by weight of sediment.

[0034] Use a rotary tiller (Dongfanghong 1GQN-125 rotary tiller, China YTO Group Co., Ltd.) for the first rotary tillage, and stir the sedim...

Embodiment 2

[0041] Application of the bottom mud after embodiment 2 stabilization of the present invention on crops planting

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Abstract

The invention discloses a stabilizing method of heavy metal polluted bottom mud and an application of a stabilizing method. The stabilizing method comprises the following steps: 1) naturally dehydrating the heavy metal polluted bottom mud and then tiling on farmland; 2) scattering a stabilizing agent on the heavy metal polluted bottom mud on the farmland; 3) performing the primary rotary tillage; 4) alternation for wetting and drying for 15 days, performing the second rotary tillage to obtain the aged bottom mud after exposing in the air for 7 days; and 5) mixing sand and straw in a volume ratio, performing the third rotary tillage to obtain the stabilized bottom mud. The invention further provides an application of the stabilizing method of heavy metal polluted bottom mud in bottom mud heavy metal pollution treatment. The invention further provides the application of the stabilized bottom mud obtained through the stabilizing method of heavy metal polluted bottom mud in the crop planting. The treated bottom mud heavy metal stabilizing effect is obvious, and the heavy metal content of the planted vegetable crop meets the national standard.

Description

technical field [0001] The invention belongs to the field of ecological environment treatment, in particular to a method for stabilizing heavy metal-polluted bottom mud and its application. Background technique [0002] Sediment is an important part of the water body, mainly composed of clay minerals, organic matter, and active metal oxides. This natural particle has a huge specific surface area and plays an important role in the water environment. It is a variety of pollutants in the water. sources and sinks. Sediment dredging is an effective measure to improve lake water quality, and the disposal of dredged sediment needs to meet the requirements of safety, rationality and economy at the same time. The resource utilization of sediment has attracted more and more people's attention. In the way of resource utilization of dredged sediment with light and moderate pollution, land use has the advantages of large amount, simple technology and good economy. The dredged sediment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C09K17/06C09K17/00
Inventor 李翔刘永兵贾斌程言君吴军洪文良许杰峰吴光辉
Owner ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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