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Method for preparing modified fly ash/bentonite mixed adsorbent

A technology of bentonite and fly ash is applied in the field of preparing modified fly ash/bentonite mixed adsorbent, which can solve the problem of high cost of odor

Inactive Publication Date: 2018-11-30
QIDONG CHUANGLU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of using activated carbon to treat drinking water odor is very high, so it is necessary to develop new low-cost adsorbents suitable for the removal of earthy and musty odor in water treatment
Materials such as fly ash and bentonite have the characteristics of convenient use and low cost due to their abundant sources. In recent years, they have been used in many environmental applications, such as the adsorption of metal ions, phenolic compounds, pesticides and organic dyes, etc., but as adsorbents There are few reports on the removal of soil mold odor in water bodies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for preparing a modified fly ash / bentonite mixed adsorbent, comprising the steps of: pulverizing bentonite, passing bentonite and fly ash through a 200-mesh sieve; adding 25 parts of bentonite to 80 parts of sulfuric acid, stirring for 45 minutes, and then adding 20 parts of bentonite fly ash, and continue to stir for 45 minutes to obtain a mixture, which is filtered, washed with ultrapure water until neutral, and dried at 70°C for 10 hours; all raw materials are parts by weight.

Embodiment 2

[0014] A method for preparing a modified fly ash / bentonite mixed adsorbent, comprising the steps of: pulverizing bentonite, passing bentonite and fly ash through a 200-mesh sieve; adding 20 parts of bentonite to 75 parts of sulfuric acid, stirring for 40 minutes, and then adding 15 parts of bentonite fly ash, and continue to stir for 40 minutes to obtain a mixture, which is filtered, washed with ultrapure water until neutral, and dried at 65°C for 9 hours; all raw materials are parts by weight.

Embodiment 3

[0016] A method for preparing a modified fly ash / bentonite mixed adsorbent, comprising the steps of: pulverizing bentonite, passing bentonite and fly ash through a 200-mesh sieve; adding 30 parts of bentonite to 85 parts of sulfuric acid, stirring for 50 minutes, and then adding 25 parts of bentonite fly ash, and continue to stir for 50 minutes to obtain a mixture, which is filtered, washed with ultrapure water until neutral, and dried at 75°C for 11 hours; all raw materials are parts by weight.

[0017] The method has low cost and simple process, and the prepared modified fly ash / bentonite mixed adsorbent has good adsorption and removal effect on dimethyldecalinol and 2-methylisoborneol, and has broad market prospect.

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PUM

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Abstract

The invention discloses a method for preparing a modified fly ash / bentonite mixed adsorbent. The steps are as follows: crushing bentonite, and sieving the bentonite and fly ash through a 200 mesh sieve, adding the bentonite to sulfuric acid, performing stirring for 40 to 50 minutes, then adding the fly ash, continuing to perform stir for 40-50 min to obtain a mixture, filtering the mixture, performing washing by ultra-pure water to neutral, and performing drying at 65 to 75 DEG C for 9 to 11 h, so as to obtain the mixed adsorbent. The method has low cost and a simple process, and the preparedmodified fly ash / bentonite mixed adsorbent has good adsorption and removal effects on dimethylnaphthyl alcohol and 2-methylisoborneol and has broad market prospects.

Description

technical field [0001] The invention relates to a method for preparing a modified fly ash / bentonite mixed adsorbent. Background technique [0002] Water body odor is one of the common water environment problems, among which the musty smell produced by algae and / or actinomycetes is a problem often complained by citizens in drinking water. Among the chemicals that cause musty smell in water bodies, dimethyldecalinol (geosmin) and 2-methylisoborneol (MIB) are the most common and difficult to remove. Trace amounts of geosmin and MIB can be sensed, and the thresholds of human perception are about 4ng / L and 10ng / L respectively. Conventional water treatment processes, such as coagulation, sedimentation, and filtration, cannot effectively remove the musty smell in drinking water, and aeration can only remove part of the odor. In recent years, some studies on odor control and removal methods for drinking water and lakes have been carried out, mainly including activated carbon adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28B01J20/30C02F101/34
CPCB01J20/24B01J20/12C02F1/281C02F1/286C02F2101/34
Inventor 不公告发明人
Owner QIDONG CHUANGLU NEW MATERIAL CO LTD
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