Process for preparing bentonite dephosphorization water purification agent

A technology of phosphorus water purifier and bentonite, which is applied in the field of environmental protection treatment, can solve the problems of low phosphorus removal, inability to achieve advanced treatment, and inability to inhibit the release of dissolved phosphorus in sediment.

Inactive Publication Date: 2008-09-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this agent is that the amount of phosphorus removal is low, and it can only partially remove soluble phosphate and other nutrients in the water body, which cannot meet the requirements of advanced treatment; it cannot inhibit the release of dissolved phosphorus in the sediment, and cannot reach the sample Effect of Kanji

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:

[0013] (1) Weigh 3g of lanthanum chloride heptahydrate, dissolve it in 400ml of deionized water, and stir at 60°C; weigh 20g of sodium-based bentonite that has been dried, crushed, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride , after stirring for 2 hours, wash 4 times with deionized water, filter and dehydrate, then put the obtained filter cake into 200ml deionized, and stir to form a suspension;

[0014] (2) Weigh 2g polyaluminum ferric chloride, add it into the suspension, stir at room temperature for 4 hours, then dehydrate, and filter to obtain a filter cake;

[0015] (3) Dry the filter cake at 70° C. for 24 hours, pulverize it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifying agent of the present invention.

[0016] The method for using t...

Embodiment 2

[0022] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:

[0023] (1) Weigh 5g of lanthanum chloride heptahydrate, dissolve it in 300ml of deionized water, and stir at 40°C; weigh 20g of calcium-based bentonite that has been dried, crushed, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride , after stirring for 6 hours, wash twice with deionized water, filter and dehydrate, then put the obtained filter cake into 100ml deionized, and stir to form a suspension;

[0024] (2) Weigh 3g of polyaluminum chloride, add it to the suspension, stir at 40°C for 2 hours, then dehydrate, and filter to obtain a filter cake;

[0025] (3) Dry the filter cake at 80° C. for 24 hours, crush it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifier.

[0026] The method for using the phosphorus removal water purifier to remove phosphor...

Embodiment 3

[0032] A preparation method of bentonite phosphorus removal water purifier, the preparation method comprises the following steps:

[0033] (1) Weigh 7g of lanthanum chloride heptahydrate, dissolve it in 200ml of deionized water, and stir at room temperature; weigh 20g of sodium-based bentonite that has been dried, pulverized, and passed through a 200-mesh sieve, and slowly and evenly add it to the aqueous solution of lanthanum chloride. After stirring for 12 hours, wash with deionized water 3 times, filter and dehydrate, then put the obtained filter cake into 150ml deionized, and stir to form a suspension;

[0034] (2) Weigh 4g of polyferric chloride, add it to the suspension, stir at 60°C for 6 hours, then dehydrate, and filter to obtain a filter cake;

[0035] (3) Dry the filter cake at 90° C. for 24 hours, crush it, and pass it through a 200-mesh sieve to obtain the phosphorus-removing water purifier.

[0036] The method for using the phosphorus removal water purifier to r...

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PUM

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Abstract

A preparation method of bentonite phosphorus removal water purifying agent comprises the steps of drying calcium bentonite or sodium bentonite, pulverizing, sieving with 200 mesh sieve, adding a lanthanum salt solution, stirring in a water bath with room temperature to 60 DEG C for 2-12 hours, washing, and preparing into 5-10 wt% slurry; adding inorganic polymeric flocculant into the above slurry, and stirring; filtering; and drying the filter cake at 70-90 DEG C, and pulverizing to 40-200 mesh powder as bentonite phosphorus removal water purifying agent. The inventive method modifies bentonite with inorganic polymeric flocculant and lanthanum salt, so as to enhance the precipitation, coagulation and flocculation action of the bentonite phosphorus removal water purifying agent through the synergism among the inorganic polymeric flocculant, lanthanum salt and bentonite. The inventive method is simple; and the obtained bentonite phosphorus removal water purifying agent has high efficiency and good safety, and has important application value in environmental protection and controlling of water bodies such as river, lake and water reservoir.

Description

technical field [0001] A preparation method of a bentonite phosphorus-removing water purifier is a preparation method of a composite bentonite water purifier for removing phosphate in eutrophic water bodies, and belongs to the technical field of environmental protection treatment. Background technique [0002] With the aggravation of water pollution, the phenomenon of eutrophication in my country's water body is gradually serious, the balance and stability of water ecosystem are destroyed, and the living environment of human beings is also under great threat. The main cause of eutrophication is the excessive nitrogen and phosphorus elements, and the excessive phosphorus element has a special contribution to the eutrophication of water bodies. As an economical and efficient water body phosphorus removal technology, the chemical method is very suitable for the current national conditions of sewage treatment in our country. Currently widely used chemicals include: aluminum iro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F1/28C02F1/52
Inventor 陈吉宁徐速佟庆远
Owner TSINGHUA UNIV
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