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Lake sediment pollution remediation active material and application thereof

An active material and pollution remediation technology, applied in water pollutants, water/sludge/sewage treatment, polluted waterways/lakes/ponds/rivers treatment, etc., can solve the unreachable treatment effect, water disturbance and erosion, Gravity instability and other problems, to achieve the effect of reducing As and Cd content, large specific surface area, and more oxygen-containing functional groups

Pending Publication Date: 2022-05-10
SINOHYDRO BUREAU 6 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the covering materials have the problems of light weight and unstable gravity, and are easily disturbed and eroded by water bodies, resulting in failure to achieve the expected treatment effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The sediment in the depth range of 0-60cm in the surface layer of the Shaying River in Zhoukou, Henan Province was collected to carry out the indoor sediment restoration simulation experiment. The collected bottom mud was mixed evenly, and then loaded into two reactors with a diameter of 5 cm and a height of 30 cm (for the experimental group and the control group, respectively), and each reactor was paved with 3 cm thick bottom mud. Among them, the total nitrogen content in the mixed sediment is 12.8mg / L, the total phosphorus content is 0.142mg / L, the As content is 12.2μg / kg; the Cd content is 19.57μg / kg.

[0032] Mix 30 parts of sodium aluminosilicate molecular sieve, 45 parts of 40-mesh fine sand and 25 parts of clay, put them into a mold to make active material granules with a diameter of 6mm and a height of 12mm, and then carefully lay them on the bottom of the experimental group reactor Above the mud (the control group is not laid), the laying thickness is 12cm. T...

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Abstract

The invention provides a lake sediment pollution remediation active material and application thereof, and relates to the technical field of lake sediment pollution remediation. The lake sediment pollution remediation active material provided by the invention is prepared from the following materials in parts by weight: 25-35 parts of a molecular sieve, 40-50 parts of a weighting agent and 20-30 parts of a gel material. The prepared active material has a larger specific surface area, a rich pore structure, more oxygen-containing functional groups and larger cation exchange capacity, can more effectively inhibit release of N and P in bottom mud to overlying water, and reduces the content of biologically available As and Cd in river bottom mud.

Description

technical field [0001] The invention relates to the technical field of lake bottom mud pollution restoration, in particular to an active material for lake bottom mud pollution restoration and an application thereof. Background technique [0002] At present, exogenous pollution of some lakes has been strictly controlled, but endogenous pollution still threatens the water quality of lakes. Especially when external water bodies flow in and the water body environment changes, the polluted sediments in the lake are disturbed, which will cause a large amount of N and P in the sediment to be released to the water body. Therefore, an important measure to solve the eutrophication of polluted lake water is to inhibit the release of pollutants in the sediment to the water body. At present, the main methods of sediment pollution control are: natural restoration, covering and dredging. The main advantages of covering technology: convenient construction, low price, no disturbance of wat...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/16B01J20/28C02F11/00C02F101/10C02F101/20
CPCB01J20/10B01J20/16B01J20/12B01J20/28019C02F11/008C02F2103/007C02F2101/103C02F2101/105C02F2101/16C02F2101/20
Inventor 赵海涛
Owner SINOHYDRO BUREAU 6 CO LTD
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