CN110339868A - A kind of situ aggregation method modified anion exchanger resin and the preparation method and application thereof - Google Patents
A kind of situ aggregation method modified anion exchanger resin and the preparation method and application thereof Download PDFInfo
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- CN110339868A CN110339868A CN201910506740.5A CN201910506740A CN110339868A CN 110339868 A CN110339868 A CN 110339868A CN 201910506740 A CN201910506740 A CN 201910506740A CN 110339868 A CN110339868 A CN 110339868A
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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
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/08—Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/12—Macromolecular compounds
- B01J41/13—Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
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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
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- Hydrology & Water Resources (AREA)
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- Treatment Of Water By Ion Exchange (AREA)
Abstract
The present invention relates to a kind of situ aggregation method modified anion exchanger resin and the preparation method and application thereof, which is with tertiary amine groups [- N (CH3)2] anion exchange resin be organic backbone, epoxychloropropane and dimethylamine are modifying agent, and ethylenediamine, which is that crosslinking agent is modified, to be made.Modified anion exchanger resin produced by the present invention, amine groups content increases, alkalescent group is also increased simultaneously, the Zeta potential of modified anion exchanger resin obviously increases, and its isoelectric point is 6.62, significantly larger than unmodified resin material, substantially increase the adsorption treatment effect to Cr (VI), quality is stablized, good adsorption performance, and it is low in cost, be separated by solid-liquid separation simple, mechanical strength is big, adsorption capacity is high, favorable regeneration effect, it is without secondary pollution the advantages that.
Description
Technical field
The present invention relates to a kind of situ aggregation method modified anion exchanger resins and the preparation method and application thereof, belong to chemistry
And field of environmental technology.
Background technique
Chromium is considered as one of strongest metal of toxicity, be mainly derived from mining, metallurgy, electroplating industry, metal deep processing,
The waste water that the industries such as steel and iron manufacturing, process hides, dyestuff, textile industry and chromate preparation generate.Chromium is a kind of valence variation element, naturally
Mainly exist in water body with two kinds of relatively stable valence states: Cr (III) and Cr (VI).Cr (VI) has solubility, in water body
Usually with CrO4 2-、Cr2O7 2-、HCrO4 -Exist Deng the anionic form with high fluidity, there is very strong oxidability and moves
Shifting ability, and Cr (VI) can be penetrated into the cell by cell membrane and the diffusion of oxidative biological molecule, be had than Cr (III) bigger
Risk, constitute a serious threat to ecological environment and human health.Cr (VI) can be added up step by step by food chain, Long Term Contact
Or excess intake will lead to human body gene mutation or cell carcinogenesis, be listed in one of maximum 8 kinds of chemical substances of harm to the human body,
The highest for being also defined as 129 kinds of priority pollutants by Environmental Protection Agency (EPA) and Environment Protect in China office (EPB) simultaneously is excellent
First grade.Therefore, the concentration that how research reduces Cr in waste water (VI) has important practical significance.
Currently, primary abatement method of the processing containing Cr (VI) waste water includes chemical precipitation method, coprecipitation, electrochemical deposition
Method, absorption method, biosorption process, electrodialysis, film filtering, reverse osmosis and ion exchange etc..Wherein, ion-exchange is generally to answer
A method of processing more efficiently, economic is containing Cr (VI) waste water.
Ion exchange resin is a kind of common ion-exchanger, equipment with it is easy to operate, easily separated, renewable and follow
Ring utilizes, and environmental pollution is small, and containing in processing has extensive use in Cr (VI) waste water.Ion exchange resin is according to different kinds
Class can be divided into different types, and weak anion resin refers to containing alkalescent group, such as primary amine groups (also known as level-one amine
Base)-NH2, secondary amine (secondary amine)-NHR or tertiary amine groups (three-level amido)-NR2, they can dissociate OH- in water and be in
Alkalescent.The positive charged group of this resin can act in conjunction with the Anion-adsorption in solution to generate anion exchange, it
It can only work, can be regenerated with alkali under neutral or acid condition (such as pH1-9).
D301 resin is in the styrene-divinylbenzene copolymer of macroporous structure mainly with tertiary amine groups [- N (CH3)2]
Anion exchange resin.Appearance is usually the opaque spherical particle of milky, and alkalinity is weaker, can be in acid Nearly neutral medium
In effectively exchange inorganic acid and silicate, and the larger-size impurity of binding molecule and can be used in non-aqueous solution.It should
Resin has the advantages that regeneration efficiency is high, exchange capacity is big, contamination resistance is strong, mechanical strength is good.But since its N content has
Limit, it is limited to the removal ability of anion in water.So resin is modified be it is a kind of improve resin adsorption capacity it is effective
Method has directive significance in its practical application aspect.
Therefore it provides a kind of pair of chromium carries out adsorption treatment, and handling rate is higher, and to the adsorption capacity of Cr (VI) ion
It greatly, is urgent need to resolve of the present invention without secondary pollution, the modified anion exchanger resin that can be recycled and preparation method thereof
Problem.
Summary of the invention
, by other ions be affected etc. problems, the present invention limited for existing anion exchange resin adsorption capacity mentions
For a kind of situ aggregation method modified anion exchanger resin and the preparation method and application thereof.
The present invention is achieved through the following technical solutions:
A kind of situ aggregation method modified anion exchanger resin, the modified anion exchanger resin be with tertiary amine groups [-
N(CH3)2] anion exchange resin be organic backbone, epoxychloropropane and dimethylamine are modifying agent, and ethylenediamine changes for crosslinking agent
Property be made.
A second object of the present invention is to provide a kind of preparation methods of situ aggregation method modified anion exchanger resin.
A kind of preparation method of situ aggregation method modified anion exchanger resin, comprises the following steps that
(1) taking mass concentration is that the dimethylamine agueous solution of 30-50% is cooled to temperature less than or equal to 10 DEG C；
(2) weak-base anion-exchange resin is added into the dimethylamine solution after cooling, under stiring, is dripped into system
Add epoxychloropropane, reinforce cooling, makes system temperature control at 10 DEG C~20 DEG C；
(3) crosslinking agent then is added dropwise into the reaction system of step (2), is warming up to 50 DEG C~90 DEG C, react 4-6h, reaction
Obtained product is separated by solid-liquid separation, purifies, is dry to get situ aggregation method modified anion exchanger resin.
Preferred according to the present invention, in step (1), the mass concentration of dimethylamine agueous solution is 40-50%, by diformazan aqueous amine
Solution is cooling in ice-water bath, makes 6-8 DEG C of dimethylamine agueous solution temperature.
Preferred according to the present invention, in step (2), the weak-base anion-exchange resin is D301 resin.
Preferred according to the present invention, in step (2), the additional amount of epoxychloropropane and the molar ratio of dimethylamine are 0.5:1
~3:1.
It is preferred according to the present invention, in step (2), the additional amount of weak-base anion-exchange resin and epoxychloropropane
Mass volume ratio is 1:(15-120), unit: g/mL.
Preferred according to the present invention, in step (2), epoxychloropropane is added dropwise using constant pressure separatory funnel, when dropwise addition
Between control in 2h.
Preferred according to the present invention, crosslinking agent described in step (3) is ethylenediamine.
It is preferred according to the present invention, crosslinking agent described in step (3) and epoxychloropropane and dimethylamine integral molar quantity
Molar ratio is (1-5): 100.
Preferred according to the present invention, in step (3), reaction temperature is 70-80 DEG C, reaction time 5h.
Third object of the present invention is to provide a kind of applications of situ aggregation method modified anion exchanger resin.
A kind of application of situ aggregation method modified anion exchanger resin, the removal for Cr (VI) ion in waste water.
Preferred according to the present invention, the specific method is as follows: under 25 DEG C of concussions, it is modified that situ aggregation method is added into waste water
Anion exchange resin, dosage are 0.2~1.2g/L, and Cr (VI) concentration is 100~500mg/L in waste water, pH value of solution is 2~
10。
It is 5%% that the present invention, which adsorbs the modified anion exchanger resin mass concentration in waste water after Cr (VI) ion,
NaOH solution carries out desorption and regeneration, and the resin sorbent after desorption recycles.
Advantages of the present invention is as follows:
1, for the present invention using epoxychloropropane and dimethylamine as modifying agent, ethylenediamine is crosslinking agent to tertiary amine groups [- N
(CH3)2] anion exchange resin be modified, obtain situ aggregation method modified anion exchanger resin, make macroporous type weak base
Property anion exchange resin amine groups content increase, while also increasing alkalescent group, modified anion exchanger resin
Zeta potential obviously increases, and its isoelectric point is 6.62, and significantly larger than unmodified resin material is substantially increased to Cr (VI)
Adsorption treatment effect.
2, the situ aggregation method modified anion exchanger resin large specific surface area that the present invention obtains, to the adsorbance of Cr (VI)
Height, specific surface area 45.832m2/ g is up to 160mgg to the adsorbance of Cr (VI)-1。
3, modified resin institute of the invention is positively charged greatly increases and performance is stablized, and can effectively improve adsorbent pair
The adsorption capacity of anionic pollutant.
4, modified resin of the invention in water for when the Adsorption of anion, being easy to be separated by solid-liquid separation, using NaOH
Solution regeneration is recoverable, and favorable regeneration effect is economic and environment-friendly, pollution-free.
Detailed description of the invention
Fig. 1 is the infrared spectroscopy (FT-IR) of modified resin and unmodified primary resin obtained in the embodiment of the present invention 1
Figure；
Fig. 2 is modified resin obtained in the embodiment of the present invention 1 and unmodified primary resin under condition of different pH
Zeta potential figure；
Fig. 3 is modified resin obtained under the conditions of different monomers ratio of the present invention and temperature to Cr (VI) adsorbance
Influence curve figure；A is different epoxychloropropane: modified weak-base anion-exchange resin is to Cr made from the molar ratio of dimethylamine
(VI) adsorbance curve graph, b are different n (ethylenediamine): modified alkalescent yin made from n (epoxychloropropane+dimethylamine) from
For sub-exchange resin to the adsorbance curve graph of Cr (VI), c is modified weak-base anion-exchange resin obtained under different temperatures
To the adsorbance curve graph of Cr (VI)；
Fig. 4 be modified resin made from the embodiment of the present invention 1 with unmodified primary resin regeneration cycle 1~4 time after to Cr
(VI) adsorbance.
Fig. 5 is modified resin made from the embodiment of the present invention 1 and unmodified primary resin in different amounts of competition anion
To the removal effect figure of Cr (VI) in the presence of in the case of, in figure, a is that unmodified primary resin exists in different amounts of competition anion
In the case of be embodiment 1 to the removal effect figure of Cr (VI), b modified resin and unmodified primary resin in different amounts of competition
To the removal effect figure of Cr (VI) in the case of anion presence, wherein abscissa is different competition anion and Cr (VI) ion
Molar ratio, for without other competing ions, only Cr (VI) ion, ordinate is adsorbance at 0.
Specific embodiment
The present invention is further illustrated with attached drawing combined with specific embodiments below, these embodiments are only to this hair
The description of bright better embodiment, but do not limit content as described below.
The Concentration Testing of Cr (VI) is measured using diphenyl carbazide spectrophotometry in example, and instrument is that Beijing is general
Analyse the TU-1810 ultraviolet-uisible spectrophotometer of all purpose instrument Co., Ltd；Zeta potential uses Malvern Zetasizer
The measurement of Nano ZS laser particle analyzer；FT-IR uses the Spectrum One examination of infrared spectrum of U.S. PE company, and sample uses
KBr tabletting.
Embodiment 1
The preparation method of situ aggregation method modified anion exchanger resin, steps are as follows:
(1) 25.1mL dimethylamine agueous solution is added in the three-necked flask with stirring and condensation reflux device, in ice-water bath
Middle cooling makes dimethylamine temperature drop to 8 DEG C, and the mass concentration of dimethylamine agueous solution is 40%；
(2) it weighs pretreated weak-base anion-exchange resin 1g to be placed in dimethylamine agueous solution, in the feelings of stirring
Under condition, epoxychloropropane 58.75mL is added dropwise with constant pressure separatory funnel, makes epoxychloropropane: molar ratio=1.5:1 of dimethylamine,
Rate of addition is controlled, time for adding is controlled in 2h, while reinforcing cooling down, and controls the temperature in reactor at 15 DEG C；
(3) continue that ethylenediamine 2.5mL is added dropwise, make n (ethylenediamine): then n (epoxychloropropane+dimethylamine)=3:100 rises
Simultaneously thermostatic control is at 70 DEG C for temperature, and the lasting 5h of reaction, obtained product separation of solid and liquid, purification in 50 DEG C of vacuum drying 12h, obtain
Situ aggregation method modified anion exchanger resin (EDE-D301).
The infrared spectrum of situ aggregation method modified anion exchanger resin and unmodified primary resin made from the present embodiment
(FT-IR) as shown in Figure 1, as seen in Figure 1, wherein the stryrene divinyl of most absorption peaks and superhigh cross-linking
Benzene series ion exchange resin D301 is identical, but O-H key characteristic peak is from 3417.05cm-1It is moved to 3369.07cm-1Place,
1422.38cm-1And 1068.75cm-1The absorption peak at place be respectively by adsorbent c h bond and N-H key stretching vibration cause
's；In 991.02cm-1And 551.73cm-1Caused by the absorption peak at place is the stretching vibration as C-O key and C-Cl key, show list
Body can be aggregated in resin by situ aggregation method.
The Zeta potential of situ aggregation method modified anion exchanger resin and unmodified primary resin made from the present embodiment
Test results are shown in figure 2, within the scope of relatively broad pH, the Zeta potential of situ aggregation method modified anion exchanger resin
It is apparently higher than D301, and its isoelectric point is 6.62, significantly larger than primary resin material (3.51), can be shown that modified resin contains
More positive charged group is conducive to its suction-operated to Cr (VI), has wider application range.
Test the ratio table of situ aggregation method modified anion exchanger resin and unmodified primary resin made from the present embodiment
Area, the specific surface area of situ aggregation method modified anion exchanger resin made from the present embodiment are 45.832m2/ g, it is unmodified
Primary resin specific surface area be 25.737m2/ g, compares surface area, and specific surface area obviously increases and decreases.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 1 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
94%, adsorbance 160mgg-1。
Embodiment 2
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
Epoxychloropropane amount is 19.58mL in step (2), and epoxychloropropane: the molar ratio of dimethylamine is 0.5:1.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 2 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
80%, adsorbance 137mgg-1。
Embodiment 3
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
Epoxychloropropane amount is 117.50mL in step (2), and epoxychloropropane: the molar ratio of dimethylamine is 3:1.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 3 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
86%, adsorbance 147mgg-1。
Embodiment 4
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
The additional amount of ethylenediamine is 0.84mL in step (3), is made n (ethylenediamine): n (epoxychloropropane+dimethylamine) is 1:
100。
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 4 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
84%, adsorbance 142mgg-1。
Embodiment 5
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
Ethylenediamine amount is 4.17mL in step (3), is made n (ethylenediamine): n (epoxychloropropane+dimethylamine) is 5:100.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 5 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
87%, adsorbance 148mgg-1。
Embodiment 6
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
Reaction temperature in step (3) is 50 DEG C.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 6 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
86%, adsorbance 146mgg-1。
Embodiment 7
With the preparation method of situ aggregation method modified anion exchanger resin described in embodiment 1, the difference is that:
Reaction temperature in step (3) is 90 DEG C.
Cr (VI) solution of 50mL, 100mg/L are adsorbed, weakly-basic anion exchange modified in 0.03g embodiment 7 is added
The temperature of resin, setting constant temperature oscillation case is 25 DEG C, revolving speed 150r/min, which is to the removal rate of Cr (VI)
88%, adsorbance 149mgg-1。
Experimental example
Modification weak-base anion-exchange resin by above-mentioned synthesis is used for the absorption of Cr in water (VI).
Adsorption experiment condition:
In 50mL 100mg/L (with CrO4 2--Meter) in potassium bichromate solution, weak base modified in 0.03g embodiment 1 is added
Property anion exchange resin and primary resin material, pH value of solution 4.5, the temperature of setting constant temperature oscillation case is 25 DEG C, shakes speed
For 150r/min.
Different epoxychloropropane: modified weak-base anion-exchange resin is to Cr's (VI) made from the molar ratio of dimethylamine
Adsorbance is as shown in Figure 3a, different n (ethylenediamine): modified weakly-basic anion exchange made from n (epoxychloropropane+dimethylamine)
Resin is as shown in Figure 3b to the adsorbance of Cr (VI), and modified weak-base anion-exchange resin obtained is to Cr under different temperatures
(VI) adsorbance is as shown in Figure 3c, as seen in Figure 3, in epoxychloropropane: the molar ratio of dimethylamine is 1.5:1, n
(ethylenediamine): n (epoxychloropropane+dimethylamine) is 3:100, and reaction temperature is 70 DEG C, the modified yin of obtained situ aggregation method from
Sub-exchange resin effect is best.
To adsorbance such as Fig. 4 of Cr (VI) after modified resin and primary resin material regeneration recycle 1~4 time in embodiment 1
Shown, primary resin material is 56mgg to the adsorbance of Cr (VI) after 4 circulations-1, it is 83% or so of stoste；Implement
Modified resin is 146mgg to the adsorbance of Cr (VI) after 4 circulations in example 1-1, it is 93% or so of stoste.
In different amounts of competition anion, there are feelings with unmodified primary resin for modified resin made from the embodiment of the present invention 1
To the removal effect figure of Cr (VI) as shown in figure 5, as seen in Figure 5 under condition, with different competition anion and Cr (VI)
The increase of the molar ratio of ion, different resins gradually decrease the adsorbance of Cr (VI).But there are situations in any competing ions
Under, the modified resin of embodiment 1 is all much higher than unmodified resin material to the adsorbance of Cr (VI).
To sum up, from experimental result as can be seen that the modified weakly-basic anion exchange tree of situ aggregation method prepared by the present invention
Rouge material increases the positive charge on resin material surface as anion adsorbent, and isoelectric point increases, and surface functional group occurs
Variation, and have and remove Cr (VI) effect and regenerability well, there is preferable practical application value in sewage treatment.
Claims (10)
1. a kind of situ aggregation method modified anion exchanger resin, which is with tertiary amine groups [- N
(CH3)2] anion exchange resin be organic backbone, epoxychloropropane and dimethylamine are modifying agent, and ethylenediamine changes for crosslinking agent
Property be made.
2. a kind of preparation method of situ aggregation method modified anion exchanger resin, comprises the following steps that
(1) taking mass concentration is that the dimethylamine agueous solution of 30-50% is cooled to temperature less than or equal to 10 DEG C；
(2) weak-base anion-exchange resin is added into the dimethylamine solution after cooling, under stiring, ring is added dropwise into system
Oxygen chloropropane reinforces cooling, makes system temperature control at 10 DEG C~20 DEG C；
(3) crosslinking agent then is added dropwise into the reaction system of step (2), is warming up to 50 DEG C~90 DEG C, react 4-6h, reaction obtains
Product be separated by solid-liquid separation, be purification, dry to get situ aggregation method modified anion exchanger resin.
3. preparation method according to claim 2, which is characterized in that in step (1), the mass concentration of dimethylamine agueous solution
It is for 40-50%, dimethylamine agueous solution is cooling in ice-water bath, make 6-8 DEG C of dimethylamine agueous solution temperature.
4. preparation method according to claim 2, which is characterized in that in step (2), the weakly-basic anion exchange
Resin is D301 resin.
5. preparation method according to claim 2, which is characterized in that in step (2), the additional amount of epoxychloropropane and two
The molar ratio of methylamine is 0.5:1~3:1.
6. preparation method according to claim 2, which is characterized in that in step (2), weak-base anion-exchange resin
The mass volume ratio of additional amount and epoxychloropropane are as follows: 1:(15-120), unit: g/mL；Epoxychloropropane uses constant pressure liquid separation
Funnel is added dropwise, and time for adding is controlled in 2h.
7. preparation method according to claim 2, which is characterized in that crosslinking agent described in step (3) is ethylenediamine.
8. preparation method according to claim 2, which is characterized in that crosslinking agent and epoxy chloropropionate described in step (3)
The molar ratio of alkane and dimethylamine integral molar quantity is (1-5): 100.
9. preparation method according to claim 2, which is characterized in that in step (3), reaction temperature is 70-80 DEG C, reaction
Time is 5h.
10. a kind of application of situ aggregation method modified anion exchanger resin, the removal for Cr (VI) ion in waste water；Specifically
Method is as follows: under 25 DEG C of concussions, add situ aggregation method modified anion exchanger resin into waste water, dosage is 0.2~
1.2g/L, Cr (VI) concentration is 100~500mg/L in waste water, and pH value of solution is 2~10.
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Cited By (2)
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| CN111974463A (en) * | 2020-08-17 | 2020-11-24 | 丹东明珠特种树脂有限公司 | Amphoteric coexisting ionic exchange resin, preparation method and application thereof in treatment of electroplating wastewater |
| CN112321837A (en) * | 2020-10-19 | 2021-02-05 | 江苏威奇达药业有限公司 | Resin for adsorbing boric acid in azithromycin process and preparation method thereof |
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| CN111974463A (en) * | 2020-08-17 | 2020-11-24 | 丹东明珠特种树脂有限公司 | Amphoteric coexisting ionic exchange resin, preparation method and application thereof in treatment of electroplating wastewater |
| CN111974463B (en) * | 2020-08-17 | 2023-04-07 | 丹东明珠特种树脂有限公司 | Amphoteric coexisting ionic exchange resin for electroplating wastewater treatment application and preparation method thereof |
| CN112321837A (en) * | 2020-10-19 | 2021-02-05 | 江苏威奇达药业有限公司 | Resin for adsorbing boric acid in azithromycin process and preparation method thereof |
| CN112321837B (en) * | 2020-10-19 | 2022-04-29 | 江苏威奇达药业有限公司 | Resin for adsorbing boric acid in azithromycin process and preparation method thereof |
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