CN107413306A - A kind of method based on reduction adsorption method processing waste water containing chrome - Google Patents
A kind of method based on reduction adsorption method processing waste water containing chrome Download PDFInfo
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- 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
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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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
- C02F2101/00—Nature of the contaminant
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Abstract
The invention discloses a kind of method based on reduction adsorption method processing waste water containing chrome, following steps are specifically included：First using egg shell and scallop shell as raw material, mixed-powder is made after sintering, then by itself and silane coupler, tetraethyl orthosilicate hybrid reaction, the intermediate for reacting to obtain is mixed to prepare adsorbent for heavy metal with PEI ionic liquid；Paper pulp mud drying and crushing is sieved, after the paper pulp mud powder HCl treatment after sieving, mixed with sodium borohydride, deionized water is added and reducing agent mother liquor is made, chromate waste water is handled by reducing agent mother liquor and adsorbent for heavy metal successively.This method can effectively remove the chromium ion in waste water, and the inorganic agent used is cheap, and cost is low, to water body non-secondary pollution.
Description
Technical field：
The present invention relates to chromate waste water process field, is specifically related to one kind and is based on reduction adsorption method processing waste water containing chrome
Method.
Background technology：
Electroplating wastewater of chromium is one kind in electroplating wastewater, is mainly derived from the plating piece rinsing of chrome-plating bath, deactivation slot etc.
Water, water clock is also included within electroplating process in the waste plating solution on terrace.Cr VI is to be primarily present shape in electroplating wastewater of chromium
State, Cr VI are the property swallowed poisonous substance/extremely toxic thing of imbedibility, and skin contact may cause sensitivity；More likely cause inherited genetic
Defect, suction are potentially carcinogenic, and have lasting danger to environment.The method of processing waste water containing chrome mainly has ion exchange at present
Method, extraction, absorption method, reduction precipitation method etc., single processing method are usually present many shortcomings, in order to preferably go
Except the chromium ion in waste water, usually by various method compounding uses.
The content of the invention：
It is an object of the invention to provide a kind of method based on reduction adsorption method processing waste water containing chrome, this method is with egg
Shell, scallop shell, paper pulp mud are that adsorbent prepared by raw material is handled, and cost is low, and obtained reducing agent mother liquor and a huge sum of money
Category ion adsorbent can effectively remove chromium ion in waste water, suitable for high concentration and the heavy metal ion of low concentration
Processing.
To achieve the above object, the present invention uses following technical scheme：
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with
5-10 DEG C/min heating rate is warming up to 550 DEG C, is incubated 1-5h, furnace cooling, mixed powder is made after sintered product grinding
End；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 60-85 DEG C, 3000-5000r/
2-5h is stirred in the state of min, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively,
Obtain intermediate；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
5-10h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and
Sodium borohydride is added, is stirred, reducing agent mother liquor is made；
(7) chromate waste water is removed into the cation or insoluble impurities in waste water by pre-processing；Then to pretreatment
Reducing agent mother liquor made from step (6) is added in chromate waste water afterwards, reduction treatment 20- is stirred in the state of 80-150 revs/min
40min, staticly settle, separation of solid and liquid, and it is heavy metal ion adsorbed made from addition step (4) into the supernatant after separation
Agent, stirring and adsorbing processing 10-30min, then staticly settles 2-4h, the supernatant after separation in the state of 200-500 revs/min
Discharge standard is reached using spectrophotometry supernatant hexavalent chromium concentration, the adsorbent for heavy metal in precipitation,
Re-used after De contamination.
As the preferred of above-mentioned technical proposal, in step (1), when soaking scallop shell with hydrochloric acid solution, scallop shell and hydrochloric acid
The mass ratio of solution is 1：(5-8), soak time 2-6h.
As the preferred of above-mentioned technical proposal, in step (2), the mass ratio of the egg shell and scallop shell is 5：(0.1-
0.3)。
As the preferred of above-mentioned technical proposal, in step (3), the mixed-powder, deionized water, silane coupler and
The amount ratio of tetraethyl orthosilicate is：(0.5-1.5)g：50ml： (1.3-2.2)ml：(1.5-4.2)ml.
As the preferred of above-mentioned technical proposal, in step (4), the matter of intermediate and the PEI ionic liquid
It is (0.5-3) to measure ratio：1.
As the preferred of above-mentioned technical proposal, in step (6), the paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Mass ratio be 3：(10-20)：(1-4).
As the preferred of above-mentioned technical proposal, in step (7), the addition of the reducing agent mother liquor is：By paper pulp mud
Addition of the powder in chromate waste water calculates for 50-100mg/L.
As the preferred of above-mentioned technical proposal, in step (7), the addition of the adsorbent for heavy metal is 300-
500mg/L。
Compared with prior art, the present invention has advantages below：
On the one hand, this present invention uses egg shell and scallop shell as raw material, dry, crush sintering after with silane coupler,
Tetraethyl orthosilicate mixes, and reacts under certain condition, and obtained intermediate mixes with PEI ionic liquid, and sun is made
Ion adsorbent, it can effectively adsorb the hexavalent chromium in waste water, and not only adsorbance is big, and contain chromium available for low concentration
The adsorption treatment of waste water；
On the other hand, the present invention uses municipal refuse paper pulp mud to be dried, crush for raw material, molten using hydrochloric acid afterwards
Liquid is handled, and the paper pulp mud powder after processing is mixed with sodium borohydride, adds deionized water and reducing agent mother is made
Liquid, its good dispersion in waste water, the hexavalent chromium in waste water effectively can be reduced into trivalent chromic ion, and precipitated；
The processing method of chromate waste water provided by the invention, cost is low, has a wide range of application, to water body non-secondary pollution, warp
Ji environmental protection.
Embodiment：
In order to be better understood from the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving
The present invention is released, any restriction will not be formed to the present invention.
Embodiment 1
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion 2h, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；Wherein, scallop shell
Mass ratio with hydrochloric acid solution is 1： 5；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with 5
DEG C/min heating rate is warming up to 550 DEG C, 2h is incubated, furnace cooling, mixed-powder is made after sintered product grinding；Wherein,
The mass ratio of egg shell and scallop shell is 5：0.1；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 60 DEG C, 3500r/min state
Lower stirring 2h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；
Wherein, the amount ratio of mixed-powder, deionized water, silane coupler and tetraethyl orthosilicate is：0.5g： 50ml：1.5ml：
1.5ml；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；Wherein, the mass ratio of intermediate and PEI ionic liquid is 0.5：1；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
5h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and is added
Enter sodium borohydride, be stirred, reducing agent mother liquor is made；Wherein, the quality of paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Than for 3：10：1；
(7) chromate waste water that chromium ion concentration is 100mg/L is removed into the cation or not in waste water by pretreatment
Solubility impurity；Then reducing agent mother liquor made from step (6), 100 revs/min of shape are added into pretreated chromate waste water
Reduction treatment 20min is stirred under state, the addition of reducing agent mother liquor is by addition of the paper pulp mud powder in chromate waste water
50mg/L is calculated, and is staticly settled, separation of solid and liquid, and weight made from 300mg/L steps (4) is added into the supernatant after separation
Metal ion adsorbent, stirring and adsorbing processing 30min, then staticly settles 2h, the supernatant after separation in the state of 200 revs/min
Liquid uses spectrophotometry supernatant hexavalent chromium concentration as 0.08mg/L, the adsorbent for heavy metal in precipitation, takes off
Re-used after absorption.
Embodiment 2
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion 6h, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；Wherein, scallop shell
Mass ratio with hydrochloric acid solution is 1： 8；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with
10 DEG C/min heating rate is warming up to 550 DEG C, is incubated 5h, furnace cooling, mixed-powder is made after sintered product grinding；Its
In, the mass ratio of egg shell and scallop shell is 5：0.3；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 85 DEG C, 5000r/min state
Lower stirring 4h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；
Wherein, the amount ratio of mixed-powder, deionized water, silane coupler and tetraethyl orthosilicate is：1.5g： 50ml：1.3ml：
1.5ml；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；Wherein, the mass ratio of intermediate and PEI ionic liquid is 3：1；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
10h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and is added
Enter sodium borohydride, be stirred, reducing agent mother liquor is made；Wherein, the quality of paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Than for 3：20：4；
(7) chromate waste water that chromium ion concentration is 10mg/L is passed through into pretreatment, removes the cation or insoluble in waste water
Property impurity；Then reducing agent mother liquor made from step (6) is added into pretreated chromate waste water, in the state of 80 revs/min
Reduction treatment 40min is stirred, the addition of reducing agent mother liquor is 50- by addition of the paper pulp mud powder in chromate waste water
100mg/L is calculated, and is staticly settled, separation of solid and liquid, and weight made from 500mg/L steps (4) is added into the supernatant after separation
Metal ion adsorbent, stirring and adsorbing processing 10min, then staticly settles 4h, the supernatant after separation in the state of 500 revs/min
Liquid uses spectrophotometry supernatant hexavalent chromium concentration as 0.01mg/L, the adsorbent for heavy metal in precipitation, takes off
Re-used after absorption.
Embodiment 3
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion 3h, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；Wherein, scallop shell
Mass ratio with hydrochloric acid solution is 1： 6；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with 6
DEG C/min heating rate is warming up to 550 DEG C, 1h is incubated, furnace cooling, mixed-powder is made after sintered product grinding；Wherein,
The mass ratio of egg shell and scallop shell is 5：0.15；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 65 DEG C, 4000r/min state
Lower stirring 5h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；
Wherein, the amount ratio of mixed-powder, deionized water, silane coupler and tetraethyl orthosilicate is：0.5g： 50ml：1.5ml：
4.2ml；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；Wherein, the mass ratio of intermediate and PEI ionic liquid is 1：1；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
6h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and is added
Enter sodium borohydride, be stirred, reducing agent mother liquor is made；Wherein, the quality of paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Than for 3：15：2；
(7) chromate waste water that chromium ion concentration is 80mg/L is passed through into pretreatment, removes the cation or insoluble in waste water
Property impurity；Then reducing agent mother liquor made from step (6) is added into pretreated chromate waste water, in the state of 80 revs/min
Reduction treatment 40min is stirred, the addition of reducing agent mother liquor is by addition of the paper pulp mud powder in chromate waste water
80mg/L is calculated, and is staticly settled, separation of solid and liquid, and weight made from 350mg/L steps (4) is added into the supernatant after separation
Metal ion adsorbent, stirring and adsorbing processing 15min, then staticly settles 3h, the supernatant after separation in the state of 300 revs/min
Liquid uses spectrophotometry supernatant hexavalent chromium concentration as 0.05mg/L, the adsorbent for heavy metal in precipitation, desorption
Attached re-using.
Embodiment 4
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion 4h, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；Wherein, scallop shell
Mass ratio with hydrochloric acid solution is 1： 6.5；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with 7
DEG C/min heating rate is warming up to 550 DEG C, 3h is incubated, furnace cooling, mixed-powder is made after sintered product grinding；Wherein,
The mass ratio of egg shell and scallop shell is 5：0.2；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 70 DEG C, 3500r/min state
Lower stirring 3h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；
Wherein, the amount ratio of mixed-powder, deionized water, silane coupler and tetraethyl orthosilicate is：0.7g： 50ml：1.5ml：
3ml；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；Wherein, the mass ratio of intermediate and PEI ionic liquid is 1.5：1；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
7h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and is added
Enter sodium borohydride, be stirred, reducing agent mother liquor is made；Wherein, the quality of paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Than for 3：15：3；
(7) chromate waste water that chromium ion concentration is 20mg/L is passed through into pretreatment, removes the cation or insoluble in waste water
Property impurity；Then reducing agent mother liquor made from step (6), 120 revs/min of state are added into pretreated chromate waste water
Lower stirring reduction treatment 30min, the addition of reducing agent mother liquor are by addition of the paper pulp mud powder in chromate waste water
60mg/L is calculated, and is staticly settled, separation of solid and liquid, and weight made from 400mg/L steps (4) is added into the supernatant after separation
Metal ion adsorbent, stirring and adsorbing processing 30min, then staticly settles 3h, the supernatant after separation in the state of 300 revs/min
Liquid uses spectrophotometry supernatant hexavalent chromium concentration as 0.02mg/L, the adsorbent for heavy metal in precipitation, takes off
Re-used after absorption.
Embodiment 5
A kind of method based on reduction adsorption method processing waste water containing chrome, comprises the following steps：
(1) scallop shell is washed with deionized the removal of impurity, then successively with the hydrochloric acid solution of mass concentration 15%, go
After ionized water immersion 5h, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；Wherein, scallop shell
Mass ratio with hydrochloric acid solution is 1： 7.5；
(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with 8
DEG C/min heating rate is warming up to 550 DEG C, 4h is incubated, furnace cooling, mixed-powder is made after sintered product grinding；Wherein,
The mass ratio of egg shell and scallop shell is 5：0.25；
(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and positive silicic acid second
Ester, after being uniformly mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 80 DEG C, 4500r/min state
Lower stirring 4h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；
Wherein, the amount ratio of mixed-powder, deionized water, silane coupler and tetraethyl orthosilicate is：1.2g： 50ml：2.0ml：
3.5ml；
(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, system
Obtain adsorbent for heavy metal；Wherein, the mass ratio of intermediate and PEI ionic liquid is 2.5：1；
(6) paper pulp mud is dried to constant weight, and pulverized and sieved, by the paper pulp mud powder and molar concentration after sieving
8h is mixed for 0.15mol/L hydrochloric acid solution, is staticly settled, after separation of solid and liquid, precipitation is diluted with deionized water, and is added
Enter sodium borohydride, be stirred, reducing agent mother liquor is made；Wherein, the quality of paper pulp mud powder, hydrochloric acid solution, sodium borohydride
Than for 3：16：3；
(7) chromate waste water that chromium ion concentration is 30mg/L is passed through into pretreatment, removes the cation or insoluble in waste water
Property impurity；Then reducing agent mother liquor made from step (6), 120 revs/min of state are added into pretreated chromate waste water
Lower stirring reduction treatment 30min, the addition of reducing agent mother liquor are by addition of the paper pulp mud powder in chromate waste water
80mg/L is calculated, and is staticly settled, separation of solid and liquid, and weight made from 450mg/L steps (4) is added into the supernatant after separation
Metal ion adsorbent, stirring and adsorbing processing 20min, then staticly settles 3.5h in the state of 400 revs/min, upper after separation
Clear liquid uses spectrophotometry supernatant hexavalent chromium concentration as 0.01mg/L, the adsorbent for heavy metal in precipitation,
Re-used after De contamination.
Comparative example 1
The reducing agent mother liquor that chromate waste water is prepared only with the present invention is handled, and does not use adsorbent for heavy metal
Processing, other treatment conditions and embodiment 5 are identical, and after testing, the concentration of the hexavalent chromium in supernatant after processing is
7mg/L。
Comparative example 2
Chromate waste water is handled only with adsorbent for heavy metal prepared by the present invention, does not use reducing agent mother liquor to carry out
Processing, other treatment conditions and embodiment 5 are identical, and after testing, the concentration of the hexavalent chromium in supernatant after processing is
11mg/L。
Comparative example 3
Do not include sodium borohydride in reducing agent mother liquor, other processing methods and embodiment 5 are identical, after testing, after processing
The concentration of hexavalent chromium in supernatant is 1.5mg/L.
Comparative example 4
Not including paper pulp mud powder in reducing agent mother liquor, other processing methods and embodiment 5 are identical, after testing, processing
The concentration of the hexavalent chromium in supernatant afterwards is 0.9mg/L.
It is from above-described embodiment as can be seen that more excellent using reducing process and absorption method Combined Treatment chromate waste water, effect
Different, sodium borohydride and paper pulp mud mutually cooperate with, and reduction treatment hexavalent chromium effect is more preferable.
Claims (8)
- A kind of 1. method based on reduction adsorption method processing waste water containing chrome, it is characterised in that comprise the following steps：(1) removal of impurity is washed with deionized in scallop shell, then successively with the hydrochloric acid solution of mass concentration 15%, deionized water After immersion, it is put into baking oven, is dried under vacuum state, and dried scallop shell is crushed；(2) egg shell crushed, cleaned, after drying, mixed and be placed in Muffle furnace with the scallop shell after above-mentioned crushing, with 5-10 DEG C/min heating rate is warming up to 550 DEG C, 1-5h is incubated, furnace cooling, mixed-powder is made after sintered product grinding；(3) mixed-powder obtained above is scattered in deionized water, and adds silane coupler and tetraethyl orthosilicate, stirred After well mixed, the pH to 9-11 of ammoniacal liquor regulation solution is added dropwise, is heated to 60-85 DEG C, 3000-5000r/min state Lower stirring 2-5h, after stirring terminates, centrifugal treating, and ionic hydration absolute ethyl alcohol washing precipitation is spent successively, obtain intermediate；(4) intermediate is mixed and is dissolved in distilled water with PEI ionic liquid, stirring, filtering, dried, a huge sum of money is made Belong to ion adsorbent；(6) paper pulp mud is dried to constant weight, and pulverized and sieved, be with molar concentration by the paper pulp mud powder after sieving 0.15mol/L hydrochloric acid solution mixes 5-10h, staticly settles, and after separation of solid and liquid, precipitation is diluted with deionized water, and adds Enter sodium borohydride, be stirred, reducing agent mother liquor is made；(7) chromate waste water is removed into the cation or insoluble impurities in waste water by pre-processing；Then contain to pretreated Reducing agent mother liquor made from step (6) is added in chrome waste water, reduction treatment 20-40min is stirred in the state of 80-150 revs/min, Staticly settle, separation of solid and liquid, and adsorbent for heavy metal made from step (4), 200- are added into the supernatant after separation Stirring and adsorbing handles 10-30min in the state of 500 revs/min, then staticly settles 2-4h, and the supernatant after separation is using light splitting Photometry measure supernatant hexavalent chromium concentration reaches discharge standard, the adsorbent for heavy metal in precipitation, after De contamination Re-use.
- A kind of 2. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (1) in, when soaking scallop shell with hydrochloric acid solution, the mass ratio of scallop shell and hydrochloric acid solution is 1：(5-8), soak time 2- 6h。
- A kind of 3. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (2) in, the mass ratio of the egg shell and scallop shell is 5：(0.1-0.3).
- A kind of 4. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (3) in, the mixed-powder, deionized water, the amount ratio of silane coupler and tetraethyl orthosilicate are：(0.5-1.5)g：50ml： (1.3-2.2)ml：(1.5-4.2)ml.
- A kind of 5. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (4) in, the mass ratio of intermediate and the PEI ionic liquid is (0.5-3)：1.
- A kind of 6. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (6) in, the paper pulp mud powder, hydrochloric acid solution, the mass ratio of sodium borohydride are 3：(10-20)：(1-4).
- A kind of 7. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (7) in, the addition of the reducing agent mother liquor is：It is 50-100mg/L by addition of the paper pulp mud powder in chromate waste water Calculate.
- A kind of 8. method based on reduction adsorption method processing waste water containing chrome as claimed in claim 1, it is characterised in that：Step (7) in, the addition of the adsorbent for heavy metal is 300-500mg/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277680A (en) * | 2021-06-02 | 2021-08-20 | 渭南师范学院 | Method for treating heavy metal ions in chemical wastewater by using silicon dioxide |
| CN114163163A (en) * | 2021-12-22 | 2022-03-11 | 株洲宏信科技发展有限公司 | Concrete chromium reducing agent |
-
2017
- 2017-05-18 CN CN201710353575.5A patent/CN107413306A/en not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| 屠振密等: "离子液体概述", 《现代合金电沉积理论与技术》 * |
| 彭治汉等: "聚醚酰亚胺", 《塑料工业手册 聚酰胺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277680A (en) * | 2021-06-02 | 2021-08-20 | 渭南师范学院 | Method for treating heavy metal ions in chemical wastewater by using silicon dioxide |
| CN114163163A (en) * | 2021-12-22 | 2022-03-11 | 株洲宏信科技发展有限公司 | Concrete chromium reducing agent |
| CN114163163B (en) * | 2021-12-22 | 2022-11-29 | 湖南润攸科技发展有限公司 | Concrete chromium reducing agent |
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