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Heavy metal pollution bottle sediment curing agent and curing method thereof

A technology of polluting sediment and solidifying method, applied in chemical instruments and methods, water pollutants, sludge treatment, etc., can solve the problems of high pH value of sediment solidified body leachate, unsatisfactory solidification effect, and harm to water quality, etc. Low cost of curing treatment, ideal curing effect and reduced toxicity risk

Inactive Publication Date: 2010-12-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing gelling materials for solidification not only have a single source, but also cost too much, and also make the pH value of the leaching solution of the solidified bottom mud too high
In the process of reuse of solidified sediment, the strong alkalinity produced by the solidified body in contact with groundwater or surface water will endanger the water quality in the ecosystem, and there may also be unsatisfactory solidification effects

Method used

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  • Heavy metal pollution bottle sediment curing agent and curing method thereof
  • Heavy metal pollution bottle sediment curing agent and curing method thereof
  • Heavy metal pollution bottle sediment curing agent and curing method thereof

Examples

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Embodiment 1

[0016] A kind of heavy metal pollution sediment solidifying agent of the present invention, this solidifying agent comprises cement (the 425# ordinary Portland cement that Changsha Shifeng Cement Factory produces) and fly ash, the mass ratio of fly ash and cement is by 1: 11. 1:5, 1:2, 1:1 and 2:1 were prepared to obtain five curing agents of the present invention respectively S2, S3, S4, S5 and S6 (see Table 1 below). At the same time, two kinds of curing agents S7 and S1 were prepared according to the mass ratio of fly ash and cement as 5:1 and no fly ash was added, as a comparative example of the curing agent of the present invention (see table 1 below).

[0017] A solidification method of the heavy metal-contaminated bottom sludge solidifying agent of the present invention, the heavy metal leaching situation of the heavy metal-contaminated bottom sludge used in the present embodiment is shown in Table 2 below, and the above-mentioned solidifying agent is directly added to s...

Embodiment 2

[0031] A heavy metal contaminated bottom mud solidifying agent of the present invention, the solidifying agent comprises cement and fly ash, and the mass ratio of fly ash and cement is configured according to 3: 7, 3: 2, 1: 4 and 1: 1 respectively, Obtain M2, M3, M4, M5 four kinds of curing agents of the present invention respectively (see table 5 below). Meanwhile, prepare a kind of pure cement solidifying agent M1 according to not adding fly ash, as the comparative example of solidifying agent of the present invention (see table 5 below).

[0032] Table 5: curing agent formulation and consumption in embodiment 2

[0033] sample

Sediment (g)

cement (g)

Fly ash (g)

M1

50

50

0

M2

50

35

15

M3

50

20

30

M4

50

20

5

M5

50

10

10

[0034]A solidification method of the heavy metal-contaminated bottom sludge solidifying agent of the present inve...

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Abstract

The invention relates to heavy metal sludge treated agent and a treating method thereof and in particular discloses a heavy metal pollution bottle sediment curing agent. The curing agent comprises cement and pulverized fuel ash, the mass ratio of the pulverized fuel ash to cement is 1:(0.5-11).The curing method of the curing agent comprises the following steps: directly adding the curing agent tothe heavy metal pollution bottle sediment with the use level of the curing agent being 0.4-1.5 times of the use level of the heavy metal pollution bottle sediment; maintaining the mixture after beingadded the curing agent for at least 3 days; and finally, completing the curing process.The curing agent and curing method of the invention not only has low processing cost but also ideal curing effect.

Description

technical field [0001] The invention relates to a treatment agent and a treatment method for sludge, in particular to a solidification agent and a solidification method for sludge containing heavy metals. Background technique [0002] With the rapid economic development and population growth year by year, the environmental problems caused by industrial wastewater and domestic sewage are becoming more and more serious, and the pollution of urban rivers is also gradually intensifying. Heavy metal pollution in sediments of water bodies has become an environmental problem of worldwide concern. Sediment refers to the surface sediment at the bottom of the water body, which is composed of humus, microorganisms, sediment and soil. Heavy metals in water body sediments can come from atmospheric dustfall, atmospheric precipitation, soil erosion, surface runoff, various types of sewage, pesticides, solid waste, etc. To a certain extent, sediments can be regarded as a reservoir of heavy...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/08C02F11/00C02F101/20
CPCC04B28/02C04B2111/00732Y02W30/91C04B18/08
Inventor 贾晓蕾曾光明张盼月范佳琦官嵩陈安伟陈桂秋
Owner HUNAN UNIV
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