CN106925209A - The concave convex rod adsorbent and preparation method of COD in a kind for the treatment of waste water - Google Patents
The concave convex rod adsorbent and preparation method of COD in a kind for the treatment of waste water Download PDFInfo
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- CN106925209A CN106925209A CN201710235706.XA CN201710235706A CN106925209A CN 106925209 A CN106925209 A CN 106925209A CN 201710235706 A CN201710235706 A CN 201710235706A CN 106925209 A CN106925209 A CN 106925209A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Abstract
The invention belongs to technical field of sewage, there is provided the concave convex rod adsorbent and preparation method of COD in a kind for the treatment of waste water, the concave convex rod adsorbent of COD includes the component of following parts by weight in the treatment waste water：Attapulgite modified 70 85 parts, 15 20 parts of aluminum oxide, 5 10 parts of crosslinking agent.Above-mentioned attapulgite is modified, add crosslinking agent, aluminum oxide, is obtained after heat treatment.Present invention tool process is simple, low cost, COD obvious processing effects, clearance is up to more than 85%, first discharge standard of the concentration of emission after treatment less than national regulation.
Description
Technical field
The invention belongs to technical field of sewage, in particular it relates to a kind of concave convex rod adsorbent for processing COD in waste water
And preparation method.
Background technology
Printed board manufacture move back film, development and the operation such as wire mark in can produce the useless of substantial amounts of dry film, wet film and ink
Liquid and waste water, it contains substantial amounts of high molecular polymer, organic amine and alkali, is a kind of organic wastewater of high concentration, and waste water is indigo plant
Color, its COD (COD) value is usually 5000-10000mg/L, and the up to 20000mg/L having, this kind of waste water accounts for printing
5% or so of plate waste water total Water.But to the COD contribution margins of whole waste water up to 80%.According to the wastewater discharge standard of country, give up
COD value in water is necessary<100mg/L.Therefore the quality of high concentration COD value wastewater treatment is whether printed board factory waste water is up to standard
It is crucial.
The common method of domestic this kind of waste water for the treatment of has at present：（1）Biological treatment；（2）Filtering absorption method；（3）Chemistry
Oxidizing process etc..
（1）Biological treatment：Biological treatment is that the organic matter in waste water is digested using bacterium, but it is useless to enter people's biochemistry groove
The COD value of water is necessarily less than 1000mg/L, and copper ion concentration is necessarily less than 5mg/L, and pH must be strict controlled in neutrality.And print
The high concentration COD waste water of plate factory not only COD value>1000mg/L, and containing substantial amounts of copper, it is difficult into the bacterium of biological treatment
It is living, also just cannot directly carry out biological treatment.Must first dilute and remove the waste water after heavy metal ion, can just carry out biological place
Manage to reduce COD value.What biological treatment had also provides the nutriment of bacterial reproduction.Aeration aerating is wanted simultaneously, and power consumption is big, place
Reason is costly, and application is not universal at present.
（2）Filtering absorption method：Filtering absorption method is will to squeeze into filter by pump after Wastewater Pretreatment, and waste water is through filtration treatment
After can remove most of undissolved high molecular polymer and suspension, filtering water outlet enters back into active carbon adsorption equipment, passes through
The suction-operated of Active Carbon in Organic reduces the COD value in waste water.Filtration method absorption method process is simple, but treatment effeciency compared with
It is low.
（3）Oxidizing process：Oxidizing process is to make organic and macromolecular compound oxidation Decomposition using Strong oxdiative condition.Conventional oxygen
Change method has：Combustion method, electrolytic oxidation, chemical oxidization method etc..Combustion method is the method that advanced oxidation waste water directly burns, light
The oxidizing process hangover liquid waste water ratio higher to treatment fuel value is more effective but costly, it is impossible to utilize extensively.Electrolytic oxidation process into
This is also high, and equipment investment is big, and palliating degradation degree is limited, and photooxidation method is still in conceptual phase.Chemical oxidization method oxidation effectiveness is limited,
Expense is also very high, and exclusive use does not reach requirement still, is often used in combination with other methods.
Attapulgite has the advantages that cheap raw material, aboundresources and specific surface area are big as a kind of natural material, concavo-convex
Rod soil have special fibre structure and crystal structure, is allowed to many special materializations and processing performance, have " general-purpose it
The good reputation of soil ".Because attapulgite has larger specific surface area, stronger suction-operated is made it have, at a fairly low dense
High-viscosity suspension can be formed under degree, can be used as dytory, suspending agent, thixotropic agent and binding agent.But attapulgite
Powder there is a problem of being difficult to precipitate, easily cause secondary pollution in water, and Improvement attapulgite property has received field skill
The concern of art personnel.
Attapulgite refers to a kind of clay mineral with attapulgite as key component.Attapulgite is hydrated for a kind of crystalloid
, with unique layer chain structure feature, there is crystal lattice in its structure, containing not in side crystal in alumina magnesia silicate
Quantitative Na+、Ca2+、Fe3+、Al3+, crystal is in needle-like, threadiness or fiber collection shape.With between chain structure and stratiform knot
Intermediate structure between structure, low intensity when not being crosslinked, easily breaks, and without elasticity, absorption and caking property are low.
The method of modifying of current solid material is mainly to carry out surface to it and is modified by surfactant, makes its surface electricity
Property changes, so that change its absorption property, but DeGrain.
Crosslinking agent is used primarily in macromolecular material, and the molecular structure of macromolecular material is not handed over as rule line long
Low intensity during connection, easily breaks, and without elasticity, the effect of crosslinking agent is exactly to produce chemical bond between the molecule of line style, makes line
Type molecule is connected with each other, and forms network structure, improves intensity and elasticity.The present invention attempts for crosslinking agent being applied to concave convex rod
Soil it is modified in, as a result have significant effect to improving concave convex rod suction-operated.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of concave convex rod absorption for processing COD in waste water
Agent and preparation method, it is an object of the invention to be directed to during existing filtering absorption method treatment high concentration COD, are done using activated carbon and inhaled
The low deficiency of attached dose of absorption efficiency, is modified by by concave convex rod, and coordinates aluminum oxide, is prepared into adsorbent, reaches efficiently
Treatment COD effect.
A kind of concave convex rod adsorbent for processing COD in waste water, the treatment waste water are provided according to an aspect of the present invention
The concave convex rod adsorbent of middle COD includes the component of following parts by weight：It is attapulgite modified 70-85 parts, aluminum oxide 15-20 parts,
Crosslinking agent 5-10 parts.Adding crosslinking agent can make a layer chain structure be cross-linked with each other to reticulate structure, thus increase its specific surface area and
Caking ability, improves absorption property；Aluminum oxide has absorption property.
Preferably, the concave convex rod adsorbent of COD includes the component of following parts by weight in the treatment waste water：It is modified concavo-convex
75-80 parts, aluminum oxide 17-19 parts, crosslinking agent 6-8 parts of rod soil.
Preferably, the concave convex rod adsorbent of COD includes the component of following parts by weight in the treatment waste water：It is modified concavo-convex
78 parts of rod soil, 18 parts of aluminum oxide, 7 parts of crosslinking agent.
According to another aspect of the present invention, there is provided the preparation side of the concave convex rod adsorbent of COD in described treatment waste water
Method, methods described comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 180-220 DEG C to spend, and process time is 5-7h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L,
Soak time is 3-6h；Chromic acid oxidation solution treatment is carried out after drying, 0.5- is soaked in the chromic acid oxidation solution under room temperature condition
6-8min, 50-75 DEG C for the treatment of 1-2min are soaked under the conditions of 0.9h, 30-45 DEG C；Calcination processing is finally carried out, treatment temperature is
450-600 DEG C, it is obtained described attapulgite modified.Appropriate heat treatment is carried out to attapulgite, in can sloughing attapulgite
Absorption water, zeolite water, partially crystallizable water and octahedron in constitution water, cause intracell and zeolite cavity break key,
Increase activated centre, its mixed and disorderly needle bar shape group piled up is become loose porous, increase at void content and specific surface area, but heat
Reason temperature is difficult too high, can otherwise cause attapulgite aperture to collapse, fibre bundle is piled up, and raphioid fiber is tightened and close is sintered in one
Rise, void content and specific surface area are reduced, absorption property reduction, therefore most preferably 180-220 DEG C of heat treatment temperature；Acid treatment can
So that attapulgite structure charge in aqueous and surface charge occur it is corresponding change, so as to change attapulgite colloid
Charging property and adsorption activity, and then influence is produced on the physicochemical properties of attapulgite, especially to the sun of attapulgite from
Sub- exchange capacity and specific surface area, selection of the present invention are acidified with hydrochloric acid solution, low cost, and effect is good.Experimental study shows,
With the increase of acid concentration, the specific surface area of attapulgite increases, but as fruit acid concentration continues to increase, then can make attapulgite
Specific surface area reduce, through overtesting concentration of hydrochloric acid solution be 10-20mol/L in the range of effect it is preferable；From chromic acid oxidation solution
Middle immersion can change the surface-active of attapulgite, it is had more hydrophily, beneficial to the COD in absorption water；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 100-180 DEG C, process time 2-
4h。
Preferably, the chromic acid oxidation solution includes the component of following parts by weight：Sodium dichromate 6-9 parts, distilled water 10-20
Part.
Preferably, the chromic acid oxidation solution includes the component of following parts by weight：Sodium dichromate 7-8 parts, distilled water 12-18
Part.
Preferably, the chromic acid oxidation solution includes the component of following parts by weight：7 parts of sodium dichromate, 15 parts of distilled water.
Preferably, the step（1）Middle heat treatment temperature is 190 DEG C.
Compared with prior art, the present invention has following beneficial effect：
（1）The present invention carries out appropriate heat treatment to attapulgite, can slough absorption water, zeolite water, portion in attapulgite
The constitution water divided in the crystallization water and octahedron, causes intracell and zeolite cavity break key, increases activated centre, makes its miscellaneous
Huddling long-pending needle bar shape group becomes loose porous, increases void content and specific surface area, heat treatment temperature most preferably 180-220
℃；Acid treatment can make attapulgite structure charge in aqueous and surface charge occur it is corresponding change, so as to change recessed
The charging property and adsorption activity of convex rod soil colloid, and then influence is produced on the physicochemical properties of attapulgite, especially to recessed
The cation exchange capacity and specific surface area of convex rod soil, selection of the present invention are acidified with hydrochloric acid solution, and low cost, effect is good；
（2）COD obvious processing effects of the present invention, clearance is up to more than 85%, and the concentration of emission after treatment is less than existing《It is dirty
Water comprehensive discharge standard》First discharge standard.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.
Embodiment 1
The concave convex rod adsorbent of COD in waste water is processed described in the present embodiment includes the component of following parts by weight：Modified attapulgite
85 parts of soil, 15 parts of aluminum oxide, 10 parts of crosslinking agent.Add crosslinking agent that a layer chain structure can be made to be cross-linked with each other and reticulate structure, so that
Increase its specific surface area and caking ability, improve absorption property；Aluminum oxide has absorption property.
The preparation method that the concave convex rod adsorbent of COD in waste water is processed described in the present embodiment comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 180 DEG C to spend, and process time is 7h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L, during immersion
Between be 6h；Chromic acid oxidation solution treatment is carried out after drying, 0.5h, 45 DEG C of conditions is soaked under room temperature condition in the chromic acid oxidation solution
Lower immersion 6min, 75 DEG C for the treatment of 1min；Calcination processing is finally carried out, treatment temperature is 600 DEG C, and the modified attapulgite is obtained
Soil；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 180 DEG C, process time 2h.
The chromic acid oxidation solution includes the component of following parts by weight：9 parts of sodium dichromate, 10 parts of distilled water.
Application process of the invention is：Attapulgite modified, aluminum oxide, crosslinking agent are re-dubbed adsorbent by weight,
Filter will be squeezed into by pump after Wastewater Pretreatment, waste water can remove most of undissolved high molecular polymer after filtration treatment
And suspension, filter water outlet and enter back into adsorbent adsorption plant, waste water is reduced to the suction-operated of organic matter by adsorbent
In COD value, clearance is up to 87.6%, and activated adoption is used under equal conditions, and clearance is up to 70.3%.
Embodiment 2
The concave convex rod adsorbent of COD in waste water is processed described in the present embodiment includes the component of following parts by weight：Modified attapulgite
70 parts of soil, 20 parts of aluminum oxide, 5 parts of crosslinking agent.Add crosslinking agent that a layer chain structure can be made to be cross-linked with each other and reticulate structure, so as to increase
Plus its specific surface area and caking ability, improve absorption property；Aluminum oxide has absorption property.
The preparation method that the concave convex rod adsorbent of COD in waste water is processed described in the present embodiment comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 220 DEG C to spend, and process time is 5h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L, during immersion
Between be 3h；Chromic acid oxidation solution treatment is carried out after drying, 0.9h, 30 DEG C of conditions is soaked under room temperature condition in the chromic acid oxidation solution
Lower immersion 8min, 50 DEG C for the treatment of 2min；Calcination processing is finally carried out, treatment temperature is 450 DEG C, and the modified attapulgite is obtained
Soil；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 100 DEG C, process time 4h.
The chromic acid oxidation solution includes the component of following parts by weight：6 parts of sodium dichromate, 20 parts of distilled water.
Application process of the invention is：Attapulgite modified, aluminum oxide, crosslinking agent are re-dubbed adsorbent by weight,
Filter will be squeezed into by pump after Wastewater Pretreatment, waste water can remove most of undissolved high molecular polymer after filtration treatment
And suspension, filter water outlet and enter back into adsorbent adsorption plant, waste water is reduced to the suction-operated of organic matter by adsorbent
In COD value, clearance is up to 88.5%, and activated adoption is used under equal conditions, and clearance is up to 71.4%.
Embodiment 3
The concave convex rod adsorbent of COD in waste water is processed described in the present embodiment includes the component of following parts by weight：Modified attapulgite
80 parts of soil, 17 parts of aluminum oxide, 8 parts of crosslinking agent.
The preparation method that the concave convex rod adsorbent of COD in waste water is processed described in the present embodiment comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 200 DEG C to spend, and process time is 6h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L, during immersion
Between be 5h；Chromic acid oxidation solution treatment is carried out after drying, 0.7h, 35 DEG C of conditions is soaked under room temperature condition in the chromic acid oxidation solution
Lower immersion 7min, 65 DEG C for the treatment of 1min；Calcination processing is finally carried out, treatment temperature is 500 DEG C, and the modified attapulgite is obtained
Soil；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 160 DEG C, process time 3h.
The chromic acid oxidation solution includes the component of following parts by weight：8 parts of sodium dichromate, 12 parts of distilled water.
Application process of the invention is：Attapulgite modified, aluminum oxide, crosslinking agent are re-dubbed adsorbent by weight,
Filter will be squeezed into by pump after Wastewater Pretreatment, waste water can remove most of undissolved high molecular polymer after filtration treatment
And suspension, filter water outlet and enter back into adsorbent adsorption plant, waste water is reduced to the suction-operated of organic matter by adsorbent
In COD value, clearance is up to 88.7%, and activated adoption is used under equal conditions, and clearance is up to 71.6%.
Embodiment 4
The concave convex rod adsorbent of COD in waste water is processed described in the present embodiment includes the component of following parts by weight：Modified attapulgite
75 parts of soil, 19 parts of aluminum oxide, 6 parts of crosslinking agent.
The preparation method that the concave convex rod adsorbent of COD in waste water is processed described in the present embodiment comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 195 DEG C to spend, and process time is 5h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L, during immersion
Between be 4h；Chromic acid oxidation solution treatment is carried out after drying, 0.7h, 38 DEG C of conditions is soaked under room temperature condition in the chromic acid oxidation solution
Lower immersion 7min, 60 DEG C for the treatment of 2min；Calcination processing is finally carried out, treatment temperature is 500 DEG C, and the modified attapulgite is obtained
Soil；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 150 DEG C, process time 3h.
The chromic acid oxidation solution includes the component of following parts by weight：7 parts of sodium dichromate, 18 parts of distilled water.
Application process of the invention is：Attapulgite modified, aluminum oxide, crosslinking agent are re-dubbed adsorbent by weight,
Filter will be squeezed into by pump after Wastewater Pretreatment, waste water can remove most of undissolved high molecular polymer after filtration treatment
And suspension, filter water outlet and enter back into adsorbent adsorption plant, waste water is reduced to the suction-operated of organic matter by adsorbent
In COD value, clearance is up to 85.6%, and activated adoption is used under equal conditions, and clearance is up to 72.1%.
Embodiment 5
The concave convex rod adsorbent of COD in waste water is processed described in the present embodiment includes the component of following parts by weight：Modified attapulgite
78 parts of soil, 18 parts of aluminum oxide, 7 parts of crosslinking agent.
The preparation method that the concave convex rod adsorbent of COD in waste water is processed described in the present embodiment comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 190 DEG C to spend, and process time is 7h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L, during immersion
Between be 5h；Chromic acid oxidation solution treatment is carried out after drying, 0.6h, 38 DEG C of conditions is soaked under room temperature condition in the chromic acid oxidation solution
Lower immersion 7min, 60 DEG C for the treatment of 1.5min；Calcination processing is finally carried out, treatment temperature is 500 DEG C, and the modified attapulgite is obtained
Soil；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 190 DEG C, process time 2h.
The chromic acid oxidation solution includes the component of following parts by weight：7 parts of sodium dichromate, 15 parts of distilled water.
Application process of the invention is：Attapulgite modified, aluminum oxide, crosslinking agent are re-dubbed adsorbent by weight,
Filter will be squeezed into by pump after Wastewater Pretreatment, waste water can remove most of undissolved high molecular polymer after filtration treatment
And suspension, filter water outlet and enter back into adsorbent adsorption plant, waste water is reduced to the suction-operated of organic matter by adsorbent
In COD value, clearance is up to 86.3%, and activated adoption is used under equal conditions, and clearance is up to 72.5%.
Specific embodiment of the invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can within the scope of the claims make various deformations or amendments, this not shadow
Sound substance of the invention.
Claims (8)
1. it is a kind of process waste water in COD concave convex rod adsorbent, it is characterised in that：The concave convex rod of COD is inhaled in the treatment waste water
The attached dose of component for including following parts by weight：It is attapulgite modified 70-85 parts, aluminum oxide 15-20 parts, crosslinking agent 5-10 parts.
2. it is according to claim 1 treatment waste water in COD concave convex rod adsorbent, it is characterised in that：The treatment waste water
The concave convex rod adsorbent of middle COD includes the component of following parts by weight：It is attapulgite modified 75-80 parts, aluminum oxide 17-19 parts,
Crosslinking agent 6-8 parts.
3. it is according to claim 1 treatment waste water in COD concave convex rod adsorbent, it is characterised in that：The treatment waste water
The concave convex rod adsorbent of middle COD includes the component of following parts by weight：Attapulgite modified 78 parts, 18 parts of aluminum oxide, crosslinking agent 7
Part.
4. as any one of claim 1-3 treatment waste water in COD concave convex rod adsorbent preparation method, its feature
It is that methods described comprises the following steps：
（1）Prepare attapulgite modified：With attapulgite as raw material, it is heat-treated, activates it, the heat treatment temperature
It is 180-220 DEG C to spend, and process time is 5-7h；Then acid treatment is carried out, is soaked with the hydrochloric acid solution that concentration is 10-20mol/L,
Soak time is 3-6h；Chromic acid oxidation solution treatment is carried out after drying, 0.5- is soaked in the chromic acid oxidation solution under room temperature condition
6-8min, 50-75 DEG C for the treatment of 1-2min are soaked under the conditions of 0.9h, 30-45 DEG C；Calcination processing is finally carried out, treatment temperature is
450-600 DEG C, it is obtained described attapulgite modified；
（2）To the step（1）In the attapulgite modified addition aluminum oxide, mixing；
（3）To the step（2）Mixture in add the crosslinking agent, be well mixed；
（4）By the step（3）Mixture be heat-treated, the heat treatment temperature be 100-180 DEG C, process time 2-
4h。
5. it is according to claim 4 treatment waste water in COD concave convex rod adsorbent preparation method, it is characterised in that：Institute
State component of the chromic acid oxidation solution including following parts by weight：Sodium dichromate 6-9 parts, distilled water 10-20 parts.
6. it is according to claim 4 treatment waste water in COD concave convex rod adsorbent preparation method, it is characterised in that：Institute
State component of the chromic acid oxidation solution including following parts by weight：Sodium dichromate 7-8 parts, distilled water 12-18 parts.
7. it is according to claim 4 treatment waste water in COD concave convex rod adsorbent preparation method, it is characterised in that：Institute
State component of the chromic acid oxidation solution including following parts by weight：7 parts of sodium dichromate, 15 parts of distilled water.
8. it is according to claim 4 treatment waste water in COD concave convex rod adsorbent preparation method, it is characterised in that：Institute
State step（1）Middle heat treatment temperature is 190 DEG C.
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