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A method for in-situ covering and restoration of sediment contaminated by heavy metals in water

A technology of polluted sediment and repair method, which is applied in the direction of water pollutants, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of low repair efficiency, high ecological risk of heavy metals, etc., and achieve good recovery, elimination or Effect of reducing sediment pollution

Active Publication Date: 2019-07-09
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0004] Aiming at the problems of low restoration efficiency and high ecological risk of heavy metals sealed in the overburden layer existing in the existing in-situ physical covering treatment technology, the present invention proposes a flexible and efficient in-situ covering restoration method for heavy metals in water body sediment

Method used

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  • A method for in-situ covering and restoration of sediment contaminated by heavy metals in water
  • A method for in-situ covering and restoration of sediment contaminated by heavy metals in water
  • A method for in-situ covering and restoration of sediment contaminated by heavy metals in water

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Embodiment Construction

[0028] like figure 1 As shown, the in-situ covering repair method of heavy metal contaminated sediment in water of the present invention is to cover the first covering layer 1, the second covering layer 2 and the third covering layer sequentially from bottom to top on the polluted river channel sediment or river channel slope At least one of 3, each layer of covering layer is filled with different fillers to realize the restoration of river channel polluted sediment, the first covering layer 1 is filled with cerium-modified zeolite and zero-valent iron mixture 2, and the second covering layer 2 is for selective heavy metal solidification Filler 4, sand grains and activated carbon filler 6 in the third covering layer 3.

[0029] Each layer of covering layer is formed by flexible connection of several fixed-length covering modules, and each fixed-length covering module is as follows: figure 2 As shown, the two sides of the frame 8 are wrapped with mesh flexible cloth 9 (polyvi...

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Abstract

The invention discloses a water body heavy metal polluted sediment in-situ covering and repairing method. The water body heavy metal polluted sediment in-situ covering and repairing method is characterized in that at least one layer of a first covering layer, a second covering layer and a third covering layer is sequentially arranged on polluted river sediment or a river slope from bottom to top; filler in the first covering layer is a mixture of cerium modified zeolite and zero-valent iron; filler in the second covering layer is selective heavy metal curing filler; filler in the third covering layer is mixed filler of activated carbon and sand; a water body can be divided into a shallow water slow flowing water body, a deep water body and a torrent water body according to the depth and the flowing speed of the water body by the three covering layers, and the shallow water slow flowing water body, the deep water body and the torrent water body can be selectively combined. The water body heavy metal polluted sediment in-situ covering and repairing method disclosed by the invention aims at different sediment pollution situations; a covering body combines physical, chemical and biological repairing measures together through a way of stacking different structure layers up and down, so that sediment pollution is efficiently removed or reduced, and the covering layers and heavy metals adsorbed thereby can be well recycled.

Description

technical field [0001] The invention relates to a method for quickly polluting bottom mud with heavy metals in water, which can remove heavy metals in bottom mud and improve the ecological environment of water bodies, and belongs to the technical field of bottom mud pollution restoration. Background technique [0002] When point source pollution in the river basin is controlled and water pollution is effectively treated, the water quality will gradually improve. However, during the industrial development period, some water sediments accumulate heavy metals for a long time, forming a source of water pollution. Even if the water quality of the water body is improved, the heavy metals accumulated in the sediment will gradually be released to the overlying water due to the change of the environmental conditions of the sediment, resulting in secondary pollution of the water body. At present, the treatment of polluted sediment in rivers and other water bodies is mainly divided int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C02F101/20
CPCC02F11/00C02F11/008C02F11/02C02F2101/20
Inventor 张彦浩张昊晗张志斌孙翠珍崔万里曹国勋邱金伟王晓栋孙彩娟
Owner SHANDONG JIANZHU UNIV
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