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Composite absorbing material

A composite adsorption material and adsorption material technology, which are applied in the field of composite adsorption materials for the treatment of oily wastewater and wastewater containing refractory organic pollutants, can solve the problems of reduced adsorption capacity of activated carbon, easy blocking of activated carbon, blocking in pores, etc., and achieve adsorption Ability-enhancing effect

Inactive Publication Date: 2007-10-17
ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, since the pores of activated carbon are usually dominated by micropores, the pore size of which is generally 2-10nm, the adsorption mechanism is surface adsorption, and organic pollutants are adsorbed on the surface of activated carbon micropores. For oil particles or insoluble Larger organic molecules, their diameter is often larger than the diameter of the pore, so they often block the entrance of the pore
Therefore, when activated carbon is used to treat wastewater containing large oil particles or large insoluble organic pollutants, it is easy to block the micropore channels of activated carbon, resulting in the inability of the surface to function and greatly reducing the adsorption capacity of activated carbon.
[0010] In the prior art, in order to solve the problem that organic pollutants are easy to block activated carbon, oil / water separators and air lift flotation systems are usually used, followed by organic modified clay as pretreatment of activated carbon, and then activated carbon treatment. There are significant defects in the process method, that is, the process is complicated and the investment is high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0033] Prepare the adsorbent material of the present invention as shown in accompanying drawing 1 according to the following steps:

[0034] 1. According to the ratio of the cation exchangeable amount (moles) of sodium bentonite and the molar ratio of quaternary ammonium salts as 1: 1, 44 grams of double hydrogenated tallow dimethyl ammonium chloride (purchased from Boxing China Resources Oil Co., Ltd. Chemical Co., Ltd.) and 53 grams of sodium bentonite (purchased from Zhejiang Fenghong Clay Chemical Co., Ltd.), were added to a three-necked flask, and 300 milliliters of deionized water was added to keep the temperature at 90 ° C, and the mixture was stirred to react for 2 hours , to obtain a slurry product;

[0035] 2. Transfer the prepared slurry product to a beaker, and add 20-30 mesh activated carbon particles (ZJ-238, Jiangsu Liyang South Activated Carbon Factory) into it, so that the activated carbon particles are completely covered by the above slurry;

[0036] 3. Dry ...

Embodiment 2

[0039] Prepare the adsorbent material of the present invention as shown in accompanying drawing 2 according to the following steps:

[0040] 1, prepare slurry product according to the operation identical with the step 1 of embodiment 1;

[0041] 2. Use a scraper to evenly coat the prepared slurry product on the upper and lower surfaces of a fibrous activated carbon filter screen (Nantong Senyou Carbon Fiber Co., Ltd.) whose length × width × thickness is 20mm × 10mm × 4mm, so that the above slurry The material is coated on the upper and lower outer surfaces of the sheet-shaped activated carbon;

[0042] 3. Dry the product obtained in step 2 for 4 hours at 130° C. to prepare the layered coated adsorbent material of the present invention.

[0043] The structure of the layered coating form adsorption material of the present invention is as shown in accompanying drawing 2, and it is made of sheet-like activated carbon 7 and the modified mineral material sodium bentonite 8 that is ...

Embodiment 3

[0045] Prepare the adsorbent material of the present invention as shown in accompanying drawing 3 according to the following steps:

[0046] 1, prepare slurry product according to the operation identical with the step 1 of embodiment 1;

[0047] 2. Use a brush to evenly coat the prepared slurry product on the outer surface of a cylindrical granular activated carbon (Hangzhou Timber Co., Ltd. Activated Carbon Branch 15#A) with a diameter of 4mm and a length of 20mm, so that the above-mentioned slurry is coated on the outer surface of the cylindrical activated carbon;

[0048] 3. Dry the product obtained in step 2 for 4 hours at 130° C. to prepare the column-coated adsorption material of the present invention.

[0049] The structure of the adsorption material in the columnar coating form of the present invention is as shown in accompanying drawing 3, and it is made of the modified mineral material sodium bentonite 8 that is coated on the outside of the cylindrical activated car...

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Abstract

A compound adsorbing material is disclosed in the invention, which comprises a first adsorbing material component and a second adsorbing material component combining outside the first adsorbing material component, wherein the volume of organic matter molecule absorbed by the first adsorbing material component is smaller than that absorbed by the second adsorbing material component, and the first adsorbing material and the second adsorbing material are formed by micropore adsorbing material and modified inorganic clay mineral, respectively. The adsorbing material of the invention uses fractional adsorption so that the first adsorbing material inside absorbs micromolecule organic matter while the outside second adsorbing material absorbs organic matter or oil particle having larger volume, thereby the organic matter blocking the micropore is prevented. The adsorbing material of the invention is easy to regenerate and has high adsorption rate, so that while treating organic matter waste water by the adsorbing material of the invention, the treating process is simplified, and investment and cost for treating waste water can be reduced.

Description

technical field [0001] The invention relates to a composite adsorption material suitable for wastewater treatment, in particular to a composite adsorption material for the treatment of oily wastewater and wastewater containing refractory organic pollutants. Background technique [0002] At present, water resources are in short supply worldwide, and water pollution is becoming more and more serious. How to rationally utilize water resources, reduce sewage discharge, and protect the water environment has attracted widespread attention from all parties. Sewage reuse technology has emerged as the times require. Sewage reuse can not only save a lot of fresh water, but also greatly reduce sewage discharge and protect the water environment. [0003] A variety of wastewater reuse technologies have been developed, among which the membrane process is a competitive technology. Standard sewage usually contains a certain amount of organic or oily substances, and the chemical oxygen dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/32C02F1/28C02F101/30
Inventor 李光辉
Owner ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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