CN101693540B - Method for preparing modified bentonite flocculating agent - Google Patents
Method for preparing modified bentonite flocculating agent Download PDFInfo
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- CN101693540B CN101693540B CN2009102724401A CN200910272440A CN101693540B CN 101693540 B CN101693540 B CN 101693540B CN 2009102724401 A CN2009102724401 A CN 2009102724401A CN 200910272440 A CN200910272440 A CN 200910272440A CN 101693540 B CN101693540 B CN 101693540B
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- sodium bentonite
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- bentonite
- flocculating agent
- ferrous sulfate
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Abstract
The invention relates to a method for preparing natural mineral modified bentonite flocculating agent. A method for preparing the modified bentonite flocculating agent is characterized by comprising the following steps: firstly, preparing ferrous sulfate solution, secondly, preparing sodium bentonite suspension, thirdly, weighing ferrous sulfate solution and sodium bentonite suspension according to mass ratio between ferrous sulfate and sodium bentonite=1:0.08-1:140, dropping the ferrous sulfate solution into the sodium bentonite suspension, obtaining the solution, fourthly, filtering solution, removing filtrate, collecting solid materials in the solution, drying the solid materials under 50 to 400DEG C, disintegrating, obtaining disintegrated solid, fifthly, placing disintegrated solid into a micro-wave oven, radiating with micro wave for 0.5 to 60min under the power of 100 to 800W, and preparing the modified bentonite flocculating agent. The modified bentonite flocculating agent of the invention has high removal rate to suspended substances and total phosphorus in polluted water, and the removal rate reaches higher than 80%. The preparation technique of the invention is simple.
Description
Technical field
The present invention relates to a kind of preparation method of modified bentonite flocculating agent.
Background technology
At present, the flocculation agent that uses on the market mainly is divided into inorganic flocculating agent, organic floculant and composite flocculation agent.Yet the use of inorganic or organic floculant might bring secondary pollution, introduces new pollution substance, and more there is the danger that discharges toxicant in organic floculant.And the use cost of composite flocculation agent is higher, is unsuitable for engineering and uses.Natural mineral has obtained more deep research as emerging environment-friendly materials, and its application prospect is very good.
Existing bentonite modified technology, as patent publication No.: CN 1769191A, denomination of invention: be used for bentonite base composite material of water treatment and preparation method thereof, it discloses a kind of bentonite base composite material that is used for water treatment and preparation method thereof.This matrix material is grouped into by multiple one-tenth, mainly comprises sodium bentonite, cetyltrimethylammonium ammonium chloride, cationic polyacrylamide etc.Its preparation method is to take by weighing sodium bentonite in reactor, adds water and is made into suspension liquid, and the back that stirs adds the cetyltrimethylammonium ammonium chloride, after fully vibrating, and suction filtration, washing, oven dry, pulverizing; Products therefrom mixes with cationic polyacrylamide solution, stirs and fully after the vibration, suction filtration, washing, oven dry, pulverizes, obtains the finished product of white powder.Settling velocity is fast though the product that this prepared goes out has, the decolorizing efficiency advantages of higher, and preparation technology is comparatively complicated, is difficult for producing in enormous quantities, drops in the engineering practicality.How when guaranteeing the efficient processing power of modified flocculant, simplifying modified technique, is problem demanding prompt solution in the bentonite modified research.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of modified bentonite flocculating agent, preparation technology is simple for this method.
To achieve these goals, technical scheme of the present invention is: a kind of preparation method of modified bentonite flocculating agent is characterized in that comprising the steps:
1) ferrous sulfate is dissolved in is configured to the copperas solution that concentration is 0.1mol/L～10mol/L (as bentonite modified dose) in the distilled water;
2) sodium bentonite is put in the Erlenmeyer flask, adds the water stirring and is configured to the sodium bentonite suspension liquid that mass concentration is 1wt%～20wt% (containing 1～20g sodium bentonite in the 100g suspension liquid), obtains the sodium bentonite suspension liquid; The cation exchange capacity of described sodium bentonite is (100～110mmol)/(100mg sodium bentonite) { being to contain 100～110mmol positively charged ion in every 100mg sodium bentonite }, smectite content in the sodium bentonite is 91～98% (quality), and the granularity of sodium bentonite is 60～200 orders;
3) press ferrous sulfate: the mass ratio of sodium bentonite=1: 0.08～1: 140, measure copperas solution, sodium bentonite suspension liquid;
Copperas solution splashes in the sodium bentonite suspension liquid with the speed of 5mL/min～100mL/min, after stirring, at the aging 5～72h of 10～80 ℃ of following constant temperature, obtains solution;
4) solution that step 3) is obtained filters, and removes filtrate, collects the solid matter in the solution, and solid matter 50～400 ℃ of oven dry down, is pulverized (80 mesh sieves are crossed in broken back), the solid after obtaining pulverizing;
5) solid after will pulverizing is put into microwave oven, and under 100～800W power, microwave exposure 0.5～60min makes modified bentonite flocculating agent (product).Product is a yellow powder.
The invention has the beneficial effects as follows: 1) preparation technology of the present invention is simple.2) adopt sodium bentonite, use ferrous sulfate to increase its interlamellar spacing, strengthen the ability of bentonite in treatment sewage.And microwave exposure can effectively be got through the passage that stops up between bentonite bed, improves bentonitic adsorptive power, plays bioactive molecule between active coating simultaneously, removes excessive moisture, optimizes the effect of mineralogical property and structure.Modified bentonite flocculating agent of the present invention all reaches more than 80% suspended substance, total tp removal rate height in the sewage.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of preparation method of modified bentonite flocculating agent comprises the steps:
1) ferrous sulfate is dissolved in is configured to the copperas solution that concentration is 0.1mol/L (as bentonite modified dose) in the distilled water;
2) sodium bentonite is put in the Erlenmeyer flask, adds the water stirring and is configured to the sodium bentonite suspension liquid that mass concentration is 1wt% (containing the 1g sodium bentonite in the 100g suspension liquid), obtains the sodium bentonite suspension liquid; The cation exchange capacity of described sodium bentonite is (100mmol)/(100mg sodium bentonite) { being to contain the 100mmol positively charged ion in every 100mg sodium bentonite }, smectite content in the sodium bentonite is 91% (quality), and the granularity of sodium bentonite is 60 orders;
3) press ferrous sulfate: the mass ratio of sodium bentonite=1: 0.08, measure copperas solution, sodium bentonite suspension liquid;
Copperas solution splashes in the sodium bentonite suspension liquid with the speed of 5mL/min, after stirring, at the aging 5h of 10 ℃ of following constant temperature, obtains solution;
4) solution that step 3) is obtained filters, and removes filtrate, collects the solid matter in the solution, and solid matter 50 ℃ of oven dry down, is pulverized (80 mesh sieves are crossed in broken back), the solid after obtaining pulverizing;
5) solid after will pulverizing is put into microwave oven, and under 100W power, microwave exposure 0.5min makes modified bentonite flocculating agent (product).Product is a yellow powder.
Use modified bentonite flocculating agent (product) to dispose of sewage, turbidity in the sewage (laboratory adopts turbidity index to represent suspension content in the water) can be reduced to 14.5～19.4NTU from 40.3～167.4NTU, total phosphorous can be reduced to 0.26～0.63mg/L from 1.40～3.61mg/L.The clearance of turbidity and total phosphor contaminant is all more than 80%.
Embodiment 2:
A kind of preparation method of modified bentonite flocculating agent comprises the steps:
1) ferrous sulfate is dissolved in is configured to the copperas solution that concentration is 5mol/L (as bentonite modified dose) in the distilled water;
2) sodium bentonite is put in the Erlenmeyer flask, adds the water stirring and is configured to the sodium bentonite suspension liquid that mass concentration is 10wt% (containing the 10g sodium bentonite in the 100g suspension liquid), obtains the sodium bentonite suspension liquid; The cation exchange capacity of described sodium bentonite is (110mmol)/(100mg sodium bentonite) { being to contain the 110mmol positively charged ion in every 100mg sodium bentonite }, smectite content in the sodium bentonite is 95% (quality), and the granularity of sodium bentonite is 100 orders;
3) press ferrous sulfate: the mass ratio of sodium bentonite=1: 80, measure copperas solution, sodium bentonite suspension liquid;
Copperas solution splashes in the sodium bentonite suspension liquid with the speed of 60mL/min, after stirring, at the aging 24h of 50 ℃ of following constant temperature, obtains solution;
4) solution that step 3) is obtained filters, and removes filtrate, collects the solid matter in the solution, and solid matter 200 ℃ of oven dry down, is pulverized (80 mesh sieves are crossed in broken back), the solid after obtaining pulverizing;
5) solid after will pulverizing is put into microwave oven, and under 400W power, microwave exposure 30min makes modified bentonite flocculating agent (product).Product is a yellow powder.
Use modified bentonite flocculating agent (product) to dispose of sewage, turbidity in the sewage (laboratory adopts turbidity index to represent suspension content in the water) can be reduced to 14.5～19.4NTU from 40.3～167.4NTU, total phosphorous can be reduced to 0.26～0.63mg/L from 1.40～3.61mg/L.The clearance of turbidity and total phosphor contaminant is all more than 80%.
Embodiment 3:
A kind of preparation method of modified bentonite flocculating agent comprises the steps:
1) ferrous sulfate is dissolved in is configured to the copperas solution that concentration is 10mol/L (as bentonite modified dose) in the distilled water;
2) sodium bentonite is put in the Erlenmeyer flask, adds the water stirring and is configured to the sodium bentonite suspension liquid that mass concentration is 20wt% (containing the 20g sodium bentonite in the 100g suspension liquid), obtains the sodium bentonite suspension liquid; The cation exchange capacity of described sodium bentonite is 110mmol/ (100mg sodium bentonite) { being to contain the 110mmol positively charged ion in every 100mg sodium bentonite }, smectite content in the sodium bentonite is 98% (quality), and the granularity of sodium bentonite is 200 orders;
3) press ferrous sulfate: the mass ratio of sodium bentonite=1: 140, measure copperas solution, sodium bentonite suspension liquid;
Copperas solution splashes in the sodium bentonite suspension liquid with the speed of 100mL/min, after stirring, at the aging 72h of 80 ℃ of following constant temperature, obtains solution;
4) solution that step 3) is obtained filters, and removes filtrate, collects the solid matter in the solution, and solid matter 400 ℃ of oven dry down, is pulverized (80 mesh sieves are crossed in broken back), the solid after obtaining pulverizing;
5) solid after will pulverizing is put into microwave oven, and under 800W power, microwave exposure 60min makes modified bentonite flocculating agent (product).Product is a yellow powder.
Use modified bentonite flocculating agent (product) to dispose of sewage, turbidity in the sewage (laboratory adopts turbidity index to represent suspension content in the water) can be reduced to 14.5～19.4NTU from 40.3～167.4NTU, total phosphorous can be reduced to 0.26～0.63mg/L from 1.40～3.61mg/L.The clearance of turbidity and total phosphor contaminant is all more than 80%.
Claims (1)
1. the preparation method of a modified bentonite flocculating agent is characterized in that comprising the steps:
1) ferrous sulfate is dissolved in is mixed with the copperas solution that concentration is 0.1mol/L～10mol/L in the distilled water;
2) sodium bentonite is put in the Erlenmeyer flask, adds the water stirring and is mixed with the sodium bentonite suspension liquid that mass concentration is 1wt%～20wt%, obtains the sodium bentonite suspension liquid; The cation exchange capacity of described sodium bentonite is that (100～110mmol)/(100mg sodium bentonite), the smectite content in the sodium bentonite is 91～98% (quality), and the granularity of sodium bentonite is 60～200 orders;
3) press ferrous sulfate: the mass ratio of sodium bentonite=1: 0.08～1: 140, measure copperas solution, sodium bentonite suspension liquid;
Copperas solution splashes in the sodium bentonite suspension liquid with the speed of 5mL/min～100mL/min, after stirring, at the aging 5～72h of 10～80 ℃ of following constant temperature, obtains solution;
4) solution that step 3) is obtained filters, and removes filtrate, collects the solid matter in the solution, and solid matter 50～400 ℃ of oven dry down, is pulverized the solid after obtaining pulverizing;
5) solid after will pulverizing is put into microwave oven, and under 100～800W power, microwave exposure 0.5～60min makes modified bentonite flocculating agent.
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| CN2009102724401A CN101693540B (en) | 2009-10-19 | 2009-10-19 | Method for preparing modified bentonite flocculating agent |
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| CN102557367B (en) * | 2012-02-02 | 2013-07-03 | 南京大学 | Method for recycling and safely disposing aluminum-salt containing coagulated sludge |
| CN103285807B (en) * | 2013-04-19 | 2016-03-23 | 云南烟草科学研究院 | A kind of modified montmorillonite used additives of filter tip containing nanometer ferrous ion and application |
| CN104045130B (en) * | 2014-06-23 | 2016-08-17 | 中国科学院重庆绿色智能技术研究院 | Bentonite-Fe-C composite water disposal agent and its preparation method and application |
| CN104986778B (en) * | 2015-06-19 | 2017-05-17 | 芜湖恒杰膨润土科技有限公司 | Sodium bentonite and double sodium modifying method for sodium bentonite |
| CN106984263A (en) * | 2016-01-20 | 2017-07-28 | 戴祺又 | A kind of modified alta-mud formaldehyde adsorbent and preparation method thereof |
| CN110238189A (en) * | 2019-07-01 | 2019-09-17 | 四川大学 | Repair the ferrous sulfate modified alta-mud and its preparation method and application of pollution of vanadium soil |
| CN112250079A (en) * | 2020-10-21 | 2021-01-22 | 西安工程大学 | Preparation method of polyethylene glycol modified sodium bentonite |
| CN113817479A (en) * | 2021-11-23 | 2021-12-21 | 潍坊华潍新材料科技有限公司 | Preparation process of soil conditioner |
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