A method for remediation of surface water contaminated sediment and control of nutrient release

A bottom mud and surface technology, applied in water/sludge/sewage treatment, sludge treatment, sludge treatment, etc., can solve the problem that the fixing capacity of zirconium-modified zeolite is not very high, and achieve long effective duration and good repair , The effect of reducing the gas supply

Inactive Publication Date: 2018-07-13
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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  • A method for remediation of surface water contaminated sediment and control of nutrient release
  • A method for remediation of surface water contaminated sediment and control of nutrient release
  • A method for remediation of surface water contaminated sediment and control of nutrient release

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of zirconium calcium modified zeolite (1)

[0037] Herein, the natural zeolite refers to an aluminosilicate crystal mineral with a skeleton structure existing in nature.

[0038] (a) Preparation of calcium-modified zeolite: use 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, then pipette Ca according to the liquid-solid ratio of 10mL / g 2+ The solution was fully mixed with the natural zeolite; the container was placed in a shaker and reacted for 24 hours under the reaction conditions of 150rpm and 25°C. After the reaction, the solid-liquid separation was carried out to obtain a solid material, and then the solid material was washed repeatedly until the AgNO 3 The solution does not detect Cl in the cleaning solution - , and dry to obtain calcium-modified zeolite;

[0039] (b) the calcium-modified zeolite and zirconium oxychloride octahydrate prepared...

Embodiment 2

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

[0041] (a) Preparation of calcium-modified zeolite: adopting calcium chloride to prepare Ca with a concentration of 0.2mol / L 2+ Solution, weigh a certain quality of natural zeolite and place it in a container, then pipette Ca according to the liquid-solid ratio of 1mL / g 2+The solution was fully mixed with the natural zeolite; the container was placed in a shaker and reacted for 96 hours under the reaction conditions of 150rpm and 25°C. After the reaction, the solid-liquid separation was carried out to obtain a solid material, and then the solid material was washed repeatedly until the AgNO 3 The solution does not detect Cl in the cleaning solution - , and dry to obtain calcium-modified zeolite;

[0042] (b) the calcium-modified zeolite and zirconium oxychloride octahydrate prepared by step (a) are added together in the container, so that the mass ratio of calcium-modified zeolite and zirconium oxychlori...

Embodiment 3

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

[0044] (a) Preparation of calcium-modified zeolite: use calcium chloride to prepare Ca with a concentration of 2.0mol / L 2+ Solution, weigh a certain quality of natural zeolite and place it in a container, then pipette Ca according to the liquid-solid ratio of 1000mL / g 2+ The solution was fully mixed with the natural zeolite; the container was placed in a shaker and reacted for 0.5h under the reaction conditions of 150rpm and 25°C. After the reaction, the solid-liquid separation was carried out to obtain a solid material, and then the solid material was washed repeatedly until the AgNO 3 The solution does not detect Cl in the cleaning solution - , and dry to obtain calcium-modified zeolite;

[0045] (b) the calcium-modified zeolite and zirconium oxychloride octahydrate prepared by step (a) are added together in the container, so that the mass ratio of calcium-modified zeolite and zirconium oxychloride oc...

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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 restoration of surface water contaminated sediment, in particular to a method for restoration of surface water contaminated sediment and control of nutrient release. Background technique [0002] At present, many surface water bodies such as rivers, reservoirs and lakes in our 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 have black and odorous phenomena. Sediment is an important part of surface water bodies. The pollutants entering the surface water body will be deposited in the sediment after certain effects, and become an important destination and storage reservoir for the pollutants entering the surface water body. Under certain conditions, the pollutants in the sediment will be released again into the overlying water body and become the internal source of the overlying water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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