CN1196652C - Integral method of synthesizing organobentonite-treating wastewater - Google Patents
Integral method of synthesizing organobentonite-treating wastewater Download PDFInfo
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- CN1196652C CN1196652C CN 03116257 CN03116257A CN1196652C CN 1196652 C CN1196652 C CN 1196652C CN 03116257 CN03116257 CN 03116257 CN 03116257 A CN03116257 A CN 03116257A CN 1196652 C CN1196652 C CN 1196652C
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Abstract
The present invention discloses an integral method for organic bentonite synthesis-wastewater treatment. The method has the steps that: (1) dried and crushed bentonite original soil with 20 to 100 meshes and a quaternary ammonium salt cation surface active agentare directly thrown into organic wastewater which is to be treated, and the ratio of the dosage of the bentonite original soil to the quantity of the organic wastewater which is to be treated is from 1:50 to 1:5000; (2) fast stir is maintained for 10 to 30 minutes; (3) reaction products stops for 10 to 60 minutes in a settling tank, solid soil and liquid water are separated, and wastewater is discharged after reaching the standards. The method has the advantages of few whole process steps for preparing organic bentonite, less investment and low operating cost of a bentonite synthesis device, energy saving, water resource saving, no secondary pollution of the surface active agent in the processes of preparation and use of the organic bentonite, simple flow path of the wastewater treatment, convenient operation, short time of the wastewater treatment, low cost of the wastewater treatment, and easy popularization and use. Besides, the efficiency of the present invention for adsorbing and removing organic pollutants is superior to the efficiency for adsorbing and removing organic pollutants when the traditional method is used for preparing the organic bentonite.
Description
Technical field
The present invention relates to a kind of organobentonite synthesizes-the wastewater treatment integral method.
Background technology
Wilkinite is to be the tonstein of essential mineral with montmorillonite (Montmorillonite).Montmorillonite is a kind of aqueous layer aluminosilicate mineral, forms by aluminium of two silicon-oxy tetrahedron therebetween (magnesium) oxygen (hydrogen-oxygen) are octahedra, belongs to the three-layer clay mineral of 2: 1 types.Lattice spacing is from being 0.96～2.14nm, and these nanometer lamellas are reunited together, forms the clay particle that the hundreds of nanometer arrives several microns.Since the wetting ability that wilkinite surface silicon oxide structure is extremely strong and the hydrolysis of interlayer cation, the non-constant of performance of the wilkinite adsorption treatment organic pollutant of non-modified.Quaternary cationics can enter bentonitic interlayer by ion exchange, significantly change the size of bentonitic two-dimensional nanostructure, interlayer becomes hydrophobicity by wetting ability, it is main that adsorption mechanism becomes distributional effects by surface adsorption, and absorption is removed the efficiency ratio original soil high tens of organic pollutant in the water to hundred times.In recent years, the focus of the organobentonite application in wastewater treatment and contaminate environment reparation having become home and abroad environment scientific and engineering area research.
The technology of organobentonite adsorption treatment organic waste water two independent sectors of processing synthetic by bentonite and organic waste water constitute, and are about to prior synthetic organobentonite and put in the organic waste water, through adsorption treatment, discharge behind the wastewater to reach standard.
Bentonite synthesizes the three kinds of methods that mainly contain: wet method, pre-gelled method, dry method.Wet method is a Bentonite Modification Technologies at present commonly used, is about to bentonite in powder and is scattered in slurrying in the organically-modified agent solution, retrofits, and then after filtration, oven dry, pulverize, obtains the organobentonite product.This method needs water bath with thermostatic control, stirs more than the 2h when slurrying, consuming time, power consumption, consume water resources, and have the waste water that contains the exhibiting high surface promoting agent to produce, need further to handle; Bentonite synthesis technique stability is bad in addition, directly influences the bentonite quality.These have all limited the application of organobentonite in wastewater treatment and contaminate environment reparation.
Summary of the invention
The purpose of this invention is to provide a kind of organobentonite synthesizes-the wastewater treatment integral method.
It is that 20～100 order wilkinite original soils and CETRIMIDE POWDER dry, that pulverize directly are added in the pending organic waste water, the dosage of CETRIMIDE POWDER is 20%～120% of a wilkinite original soil cation exchange capacity, wilkinite original soil consumption and pending organic waste water amount ratio are 1: 50～1: 5000, stir fast 10～30 minutes; Reaction product stopped 10～60 minutes at settling tank, and soil-water solid-liquid separation discharges behind the wastewater to reach standard.
The present invention's two self-contained process of processing bentonite is synthetic and organic waste water are integrated.Be about to wilkinite and tensio-active agent and directly drop in the organic waste water,, discharge behind the wastewater to reach standard through stirring, precipitating.This method has been omitted a whole set of operation of organobentonite preparation, has reduced investment of wilkinite synthesis device and working cost, and save energy and water resources have been eliminated the secondary pollution of tensio-active agent in organobentonite preparation and the use; Wastewater treatment process is simple, and is easy to operate, shortened the wastewater treatment time, and the efficient that organic pollutant is removed in absorption is better than the organobentonite that traditional method prepares, and significantly reduces the cost of wastewater treatment, is easy to promote the use of.
Description of drawings
Accompanying drawing is that organobentonite synthesizes-wastewater treatment integral process and conventional synthesizing-wastewater treatment separating treatment technology comparison diagram.
Embodiment
Above-mentioned quaternary cationics adds with 20%～120% of the cation exchange capacity (CEC) that adds the wilkinite original soil; 30～100% is good.The ratio of wilkinite original soil consumption and pending organic waste water amount is 1: 50～1: 5000.Organic pollutant in the pending organic waste water is nitrophenols, aniline, phenanthrene or dyestuff.Reusable or the reuse after manipulation of regeneration of the organobentonite mud of soil-water solid-liquid separation.
Embodiment 1
In the 100ml iodine flask, add 0.1g Inner Mongol wilkinite and a certain amount of cetrimonium bromide (CTMAB), the dosage of CTMAB calculates (amount that 20CTMAB represents to exchange the required CTMAB of wilkinite 20% positively charged ion) according to bentonitic CEC, the certain density p-nitrophenyl phenol solution of 20mL (the Tu Shui ratio is 1: 200); Under 25 ℃, 150r/min condition behind the vibration 30min, centrifugal 15min under 25 ℃, the condition of 3000r/h; Get a certain amount of supernatant liquid in the 50mL colorimetric cylinder, regulating pH is 2～3, constant volume; With the equilibrium concentration of p-NP in the uv-spectrophotometric instrument mensuration water, calculate the clearance of p-NP.100CTMAB and wilkinite directly are added in the organic waste water, and when the Tu Shui ratio was 1: 80, the clearance of 10mg/L p-NP reached more than 90%.
For the p-nitrophenyl phenol solution of 50～1000mg/L, be 1: 200 o'clock at the Tu Shui ratio, the prior synthetic organobentonite of efficiency ratio that 80CTMAB and wilkinite integral method are removed p-NP improves 6～20% (seeing accompanying drawing).
20～80CTMAB and wilkinite integral method are 1: 200 o'clock at the Tu Shui ratio, and the prior synthetic organobentonite of efficiency ratio of removing the 10mg/L p-NP improves 15～27%.
Embodiment 2
In the 100mL iodine flask, add 0.2g wilkinite (original soil) and the certain density aniline solution of certain amount of surfactant 20mL (the Tu Shui ratio is 1: 100) respectively, through vibration, centrifugal, with its equilibrium concentration of determined by ultraviolet spectrophotometry, calculate the clearance of aniline.For the solution of 200～1000mg/L aniline, when tensio-active agent CTMAB add-on was 100CEC, the prior synthetic organobentonite of efficiency ratio that integral method is removed aniline improved 5～10%.
Embodiment 3
Polycyclic aromatic hydrocarbons (PAHs) is that a class has three organic pollutants that cause effect, is difficult to by biological degradation, and the pollution of polycyclic aromatic hydrocarbons directly is detrimental to health in the water body.Organobentonite is synthetic-and the wastewater treatment integral method can effectively remove the polycyclic aromatic hydrocarbons in the water, and when the Tu Shui ratio was 1: 100,100CTMAB was almost 100% to the clearance of phenanthrene; When the Tu Shui ratio is 1: 5000, the clearance of phenanthrene is reached more than 90%.
Embodiment 4
In the 100mL iodine flask, add 50mL butyl rose red b waste water from dyestuff, add 0.1g wilkinite and 100CTMAB (the Tu Shui ratio is 1: 500), at room temperature, stirred 20 minutes, after leaving standstill 30 minutes, centrifugal, get supernatant liquid, with the concentration of butyl rose red b in the UV, visible light spectrophotometric determination water.When butyl rose red b dye strength was 10～50mg/L, integral method was 75～85% to its clearance.
Claims (5)
1. an organobentonite synthesizes-the wastewater treatment integral method, it is characterized in that: 20～100 order wilkinite original soils and CETRIMIDE POWDER dry, that pulverize directly are added in the pending organic waste water, the dosage of CETRIMIDE POWDER is 20%～120% of a wilkinite original soil cation exchange capacity, wilkinite original soil consumption and pending organic waste water amount ratio are 1: 50～1: 5000, stirred 10～30 minutes fast, stopped 10～60 minutes, soil-water solid-liquid separation discharges behind the wastewater to reach standard.
2. a kind of organobentonite according to claim 1 synthesizes-the wastewater treatment integral method, and the ratio that it is characterized in that said wilkinite original soil consumption and pending organic waste water amount is 1: 100～1: 5000.
3. a kind of organobentonite according to claim 1 synthesizes-the wastewater treatment integral method, and the consumption that it is characterized in that said CETRIMIDE POWDER is to add 30～100% of wilkinite cationic exchange total amount.
4. a kind of organobentonite according to claim 1 synthesizes-the wastewater treatment integral method, it is characterized in that the organic pollutant in the said pending organic waste water is nitrophenols, aniline, phenanthrene or dyestuff.
5. a kind of organobentonite according to claim 1 synthesizes-the wastewater treatment integral method, it is characterized in that the organobentonite mud of said soil-water solid-liquid separation is reused or reuse after manipulation of regeneration.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358634A (en) * | 2011-09-06 | 2012-02-22 | 浙江大学 | Deep treatment method for coking waste water |
| CN107096505A (en) * | 2017-05-22 | 2017-08-29 | 句容康泰膨润土有限公司 | A kind of magnetic coupling bentonite and preparation method thereof |
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| CN100455347C (en) * | 2007-04-19 | 2009-01-28 | 浙江大学 | Preparing multistage adsorbent for difficult degradative organic wastewater in high concentration, and method of use |
| CN102745772A (en) * | 2012-08-02 | 2012-10-24 | 常州大学 | Microwave assisted organic bentonite synthesis-oily wastewater treatment integrated process |
| CN102863044A (en) * | 2012-09-19 | 2013-01-09 | 常州大学 | Method for synchronously processing washing wastewater and organic chemical industrial wastewater |
| CN102847513A (en) * | 2012-09-19 | 2013-01-02 | 常州大学 | Method for preparing organic hydrotalcite |
| CN103288094A (en) * | 2013-03-21 | 2013-09-11 | 浙江桃花源环保科技有限公司 | A method and a device for recycling waste organic bentonite |
| CN103482743B (en) * | 2013-09-25 | 2015-01-07 | 山东派尼化学有限公司 | Pre-treatment method prior to biochemical treatment of sewage containing quaternary ammonium salt |
| CN103657594B (en) * | 2013-11-19 | 2015-07-15 | 浙江大学 | Preparation method of tiny hole type multihole clay heterogeneous material |
| CN104694750B (en) * | 2015-03-31 | 2017-05-24 | 德庆兴邦稀土新材料有限公司 | Environment-friendly yttrium oxide saponification-free extraction method |
| CN104961189B (en) * | 2015-07-07 | 2017-01-18 | 山东大学 | Method for treating chlorophenol-containing wastewater |
| CN105645635A (en) * | 2016-01-12 | 2016-06-08 | 浙江大学 | Physicochemical treatment method of disperse dye wastewater |
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2003
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358634A (en) * | 2011-09-06 | 2012-02-22 | 浙江大学 | Deep treatment method for coking waste water |
| CN107096505A (en) * | 2017-05-22 | 2017-08-29 | 句容康泰膨润土有限公司 | A kind of magnetic coupling bentonite and preparation method thereof |
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