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Compound water treatment agent and preparation method and application of water treatment agent

A water treatment agent and compound technology, applied in the field of composite water treatment agent and its preparation, can solve the problem of inability to comprehensively remove heavy metal ions and organic pollutants, failure to consider how to synergistically remove organic pollutants, inability to achieve rapid separation, etc. To achieve the effect of speeding up the adsorption equilibrium speed, significant adsorption effect, and improving adsorption performance

Active Publication Date: 2013-02-06
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the modification technology of a single type of natural mineral or multiple natural minerals has appeared, such as the preparation of modified bentonite, the preparation of modified zeolite adsorbent, the preparation of nano-magnetite / diatomite composite, the preparation of magnetic composite organic The preparation of bentonite, etc., but due to the fact that different types of minerals have different surface adsorption and pore filtration characteristics have not been fully considered in the process of selecting mineral types, and at the same time, how to synergistically remove organic pollutants has not been considered in the modification process , the currently available adsorbents cannot completely remove heavy metal ions and organic pollutants in water, and there are problems of single function and poor treatment effect in the water treatment process
[0005] Whether it is coagulation method or adsorption method, there is still the problem that the treated sediment (or suspended matter) and the water body cannot be separated quickly.

Method used

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  • Compound water treatment agent and preparation method and application of water treatment agent
  • Compound water treatment agent and preparation method and application of water treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The magnetic substance is separated from the smoke and dust discharged from the iron and steel plant by using a magnet block with a magnetic field strength of 1000-1500Gs. The separated magnetic substance is in the state of sol aggregation in the gaseous state of the smoke and dust, and in the state of brown-red powder in the dry state. Particle size is less than 100μm, specific magnetic susceptibility x 0 >12.6×10 -8 m 3 / kg of magnetic particles; after X-ray diffraction analysis, the main active ingredient is γ-F 2 o 3 , using chemical analysis to analyze the magnetic particles, Fe 2 o 3 The content (wt%) is 95.3% to 98.6%.

[0038] The purified sodium bentonite, diatomite and zeolite natural mineral products with a particle size of 150-200 meshes are selected for use.

Embodiment 2

[0040] (1) Weigh 35g of sodium bentonite, 4g of diatomaceous earth, 4g of zeolite and 3g of magnetic substance in Example 1 and place them in a 2000ml Erlenmeyer flask, add water to make a suspension with a weight concentration of 8%, and stir evenly.

[0041] (2) Add 250ml of chitosan solution with a weight concentration of 1% to the suspension obtained in step (1), stir at 45°C for 5 hours, then filter with suction, wash with water, dry at 95°C, crush and After passing through a 100-mesh sieve, a powdery substance was obtained.

[0042] (3) Take 48.5g of the powdery substance obtained in step (2) and add it to 150ml of polyacrylamide solution with a weight concentration of 1%, continue to stir at 50°C for 4 hours, then centrifuge at a speed of 1500r / min, water Washing, suction filtration and vacuum drying at 55°C to constant weight, and finally pulverized through a 100-mesh sieve to obtain powdery composite water treatment agent 1.

[0043] (4) Take 1g of the powdered compo...

Embodiment 3

[0045] (1) Weigh 24g of sodium bentonite, 7.5g of diatomaceous earth, 7.5g of zeolite and 5g of magnetic substance in Example 1 and place them in a 2000ml Erlenmeyer flask, add water to form a suspension with a weight concentration of 9%, and stir uniform.

[0046] (2) Add 175ml chitosan solution with a weight concentration of 2% to the suspension obtained in step (1), stir at 55°C for 5 hours, then filter with suction, wash with water, dry at 95°C and pulverize After 100-mesh sieve, a powdery substance was obtained.

[0047] (3) Take 47.5g of the powdery substance obtained in step (2) and add it to 250ml of polyacrylamide solution with a weight concentration of 1%, and continue to stir at 55°C for 5 hours, then centrifuge, wash, suction filter and 55 °C, vacuum-dried to constant weight, and finally crushed through a 100-mesh sieve to obtain powdery composite water treatment agent 2.

[0048] (4) Take 1g of the powdered composite water treatment agent 2 obtained in step (3) an...

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Abstract

The invention provides a compound water treatment agent and a preparation method and an application of the water treatment agent. The compound water treatment agent comprises the following components in parts by weight: 48-70 parts of sodium bentonite, 8-15 parts of kieselguhr, 8-15 parts of zeolite, 6-10 parts of magnetic substance, 5-7 parts of chitosan and 3-5 parts of polyacrylamide. The preparation method of the compound water treatment agent is simple, and a material source is wide. With the adoption of the compound water treatment agent, heavy metal ions and organic contaminants in water can be removed while electrolyte concentration in the water can be lowered, and solid-liquid separation can be conducted quickly by virtue of a magnetic filter method. The compound water treatment agent can be applied to a pre-treatment process of a reverse osmosis system, facilitates increasing the water production rate of the reverse osmosis system, reduces operating pressure of the reverse osmosis system, and is significant in practical value and broad in market prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a composite water treatment agent and its preparation method and application. technical background [0002] At present, most domestic industrial enterprises use reverse osmosis membrane (RO) technology for process wastewater reuse treatment, but existing RO treatment processes generally have disadvantages such as easy clogging, frequent cleaning, incomplete removal of pollutants, low water production, and high working pressure. One of the main reasons is that the electrolyte concentration in the raw water is relatively high. Although the conventional pretreatment process of adding inorganic coagulants can remove some heavy metal ions, organic matter and other pollutants, it cannot reduce the electrolyte concentration in the water to the greatest extent, that is, it cannot Effectively reduce the conductivity of water, some studies have shown that scaling will ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/42C02F1/48
Inventor 潘涌璋李金雄
Owner JINAN UNIVERSITY
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