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Method used for surface water polluted sediment remediation and nutrient release control

A sediment and surface technology, applied in water/sludge/sewage treatment, sludge treatment, sludge treatment, etc., can solve the problem that the fixation capacity of zirconium-modified zeolite is not very high, achieve long effective duration and reduce consumption. Electricity and running cost, effect of reducing air supply

Inactive Publication Date: 2016-06-15
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the zirconium-modified zeolite provided by the invention patent CN201310382732.7 is not very capable of fixing phosphate in water.

Method used

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  • Method used for surface water polluted sediment remediation and nutrient release control
  • Method used for surface water polluted sediment remediation and nutrient release control
  • Method used for surface water polluted sediment remediation and nutrient release control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of Zirconium Calcium Modified Zeolite (1)

[0037] In this article, the natural zeolite refers to aluminosilicate crystal minerals with a skeleton structure existing in nature.

[0038] (a) Preparation of calcium modified zeolite: using calcium chloride to prepare Ca with a concentration of 1mol / L 2+ Solution, weigh a certain quality of natural zeolite and place it in a container, and then pipette Ca according to a liquid-solid ratio of 10mL / g 2+ The solution is fully mixed with natural zeolite; the container is placed in a shaker at 150rpm and 25℃ for reaction for 24h. After the reaction is completed, solid-liquid separation is carried out to obtain a solid material, and then the solid material is washed repeatedly until AgNO is used 3 The solution cannot detect Cl in the cleaning solution - , Dry to obtain calcium modified zeolite;

[0039] (b) Add the calcium-modified zeolite and zirconium oxychloride octahydrate prepared in step (a) to the container to...

Embodiment 2

[0040] Example 2 Preparation of Zirconium Calcium Modified Zeolite (2)

[0041] (a) Preparation of calcium modified zeolite: Ca with a concentration of 0.2 mol / L is prepared with calcium chloride 2+ Solution, weigh a certain quality of natural zeolite and place it in a container, then pipette Ca according to a liquid-solid ratio of 1mL / g 2+ The solution is fully mixed with natural zeolite; the container is placed in a shaker at 150 rpm and 25°C for 96 hours of reaction. After the reaction, solid-liquid separation is performed to obtain solid materials, and then the solid materials are washed repeatedly until AgNO is used 3 The solution cannot detect Cl in the cleaning solution - , Dry to obtain calcium modified zeolite;

[0042] (b) Add the calcium-modified zeolite and zirconium oxychloride octahydrate prepared in step (a) to the container together so that the mass ratio of the calcium-modified zeolite and zirconium oxychloride octahydrate is 10:1; and then Add a certain volume of w...

Embodiment 3

[0043] Example 3 Preparation of Zirconium Calcium Modified Zeolite (3)

[0044] (a) Preparation of calcium modified zeolite: Ca with a concentration of 2.0 mol / L is prepared with calcium chloride 2+ Solution, weigh a certain quality of natural zeolite and place it in a container, and then pipette Ca according to a liquid-solid ratio of 1000mL / g 2+ The solution is fully mixed with natural zeolite; the container is placed in a shaker at 150rpm and 25°C for 0.5h to react. After the reaction is completed, solid-liquid separation is performed to obtain a solid material, and then the solid material is washed repeatedly until AgNO is used 3 The solution cannot detect Cl in the cleaning solution - , Dry to obtain calcium modified zeolite;

[0045] (b) Add the calcium-modified zeolite and zirconium oxychloride octahydrate prepared in step (a) to the container together so that the mass ratio of the calcium-modified zeolite and zirconium oxychloride octahydrate is 1:1; and then Add a certain v...

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PUM

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Abstract

The invention relates to a method used for surface water polluted sediment remediation and nutrient release control. On the one hand, the invention provides zeolite modified by zirconium and calcium, the zeolite modified by the zirconium and the calcium is an absorption agent which can remove the phosphate in water in a more effective manner as compared with the zeolite modified by the zirconium or the zeolite modified by the calcium, and a synergic effect on the phosphate absorption effect of the zeolite is achieved due to the fact that the zeolite is modified by the zirconium and the calcium; on the other hand, the invention combines the aeration technology with the improvement technology of the zeolite modified by the zirconium and the calcium, the combination is hard for technicians in the field to imagine, polluted sediment can be well remedied, and sediment pollutant release can be well controlled.

Description

Technical field [0001] The invention relates to the technical field of repairing contaminated bottom sludge of surface water bodies, and specifically relates to a method for repairing contaminated bottom sludge of surface water bodies and controlling nutrient salt release. Background technique [0002] At present, many rivers, reservoirs, lakes and other surface water bodies in my country are seriously polluted. Many surface water bodies are not only polluted by pollutants such as nitrogen, phosphorus, heavy metals, and organic matter, but also often suffer from black and odor. Sediment is an important part of surface water bodies. The pollutants entering the surface water body will be deposited in the bottom mud after a certain effect, and become an important destination and storage reservoir for the pollutants entering the surface water body. Under certain conditions, the pollutants in the bottom mud will be released again into the overlying water body and become the internal ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02
CPCC02F11/00C02F11/02Y02W10/20
Inventor 林建伟詹艳慧王春峰王丹赫邢云青
Owner SHANGHAI OCEAN UNIV
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