CN108640196A - A kind of method that depth removes arsenic in water removal - Google Patents
A kind of method that depth removes arsenic in water removal Download PDFInfo
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- CN108640196A CN108640196A CN201810361100.5A CN201810361100A CN108640196A CN 108640196 A CN108640196 A CN 108640196A CN 201810361100 A CN201810361100 A CN 201810361100A CN 108640196 A CN108640196 A CN 108640196A
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F2101/103—Arsenic compounds
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of methods that depth removes arsenic in water removal, and this method includes by coppe ferrite CuFe2O4It is added in arsenic-containing waste water with the compound system of persulfate composition, persulfate includes peroxy-monosulfate and/or peroxydisulfate, and the arsenic in water removal is removed with depth, wherein the molar ratio of coppe ferrite and persulfate is 1~5: 1~15.The method and process convenience of the present invention is high, it can be achieved that efficient oxidation and deeply removing arsenic integrated treatment, have excellent performance in going water removal in terms of arsenic, has height practicability, effective technological approaches is provided for the processing of arsenic-containing waste water.
Description
Technical field
The invention belongs to water-treatment technology fields, are related to a kind of method that depth removes arsenic in water removal, and in particular to Yi Zhongtie
The method that sour copper/persulfate compound system removes arsenic in water removal.
Background technology
Arsenic exists with pentavalent arsenic and trivalent arsenic in environment, especially trivalent arsenic, has high stability and toxicity, once into
Environment causes high risks to ecological environment and human health, and traditional water treatment technology is difficult to realize the removal of arsenic.Absorption is
Existing relatively effective arsenic removal technology, adsorbent common at present is activated carbon.However, activated carbon is of high cost, adsorption capacity is low,
The disadvantage of regeneration difference limits its large-scale practical application, and water outlet is difficult to reach safe water standard.Single absorption
Also without the toxicity of reduction trivalent arsenic.Currently, some high-level oxidation technologies（Such as UV/H2O2, Fenton reagent, UV/ nitrite, mistake
Sulfate and UV/ persulfates etc.）For the oxidation of trivalent arsenic, then adsorbed with adsorbent.Compared to other oxidants, over cure
Hydrochlorate is easy to operate, reaction product pollution is few.However, persulfate oxidation needs additional ultraviolet lighting or heating to cause, work is aoxidized
Skill and absorbing process cannot take into account progress simultaneously.
Existing patent report uses persulfate/iron powder/ferrous salt (NH at present4)2Fe(SO4)2.6H2O compound systems are used for
The removal of arsenic（Application number 201610876924.7）.But it has been found that in the system be added persulfate purpose be with
Ferro element（Iron powder/ferrous salt）Reaction generates ferric ion, and ferric ion is only greater than or equal to 7 alkaline condition in pH
Under（The patent is that pH is 7）It is changed into flocculant, then precipitates pentavalent arsenic, and the invented technology only has the removal of pentavalent arsenic
Effect.In fact, arsenic is coexisted with pentavalent arsenic and trivalent arsenic in environment, especially trivalent arsenic has high stability and toxicity, concentration is more
Once height causes high risks into environment to ecological environment and human health.In addition, arsenic2 flocculate is in water
Separation is difficult, causes secondary pollution.
The another report for having arsenic in a patent report foam ferrous acid polluted by copper water（Application number 201710637495.2）.The suction
Attached dose of coppe ferrite is grown on foam iron base bottom, and coppe ferrite exposure is limited, only in higher temperature（50℃）, adsorption capacity is just
It improves, practical natural water temperature is far below 50 DEG C, which is still higher than 10 in the concentration up to residual arsenic in 180 min
µg/L（Initial concentration is 1000 μ g/L）, the discharge standard of arsenic-containing waste water is not achieved, needs additional processing technique that could realize and reaches
Mark discharge.And the invention adsorbent is only used for the removal of pentavalent arsenic, and the trivalent arsenic bigger than pentavalent arsenic to toxicity does not adsorb.
It can be seen from the above, the actual treatment technological requirement based on the waste water containing trivalent arsenic, exploitation efficient oxidation-depth removal one
Body method is necessary.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of technique convenience it is high, can be real
The method that existing efficient oxidation and the depth that deeply removing arsenic is integrated, effect of removing arsenic is good and with height practicability remove arsenic in water removal.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of method that depth removes arsenic in water removal, the method includes by coppe ferrite CuFe2O4It is formed with persulfate compound
System be added arsenic-containing waste water in, with depth go water removal in arsenic, wherein the molar ratio of coppe ferrite and persulfate be 1~5: 1~
15。
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the persulfate includes peroxy-monosulfate and/or mistake
Dithionate.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the peroxy-monosulfate includes permonosulphuric acid sodium, crosses one
It is one or more in potassium sulfate, hydrogen peroxymonosulfate sodium and potassium hydrogen peroxymonosulfate.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the peroxydisulfate includes sodium persulfate, crosses two
It is one or more in potassium sulfate, ammonium peroxydisulfate, peroxy-disulfuric acid hydrogen sodium and peroxy-disulfuric acid hydrogen potassium.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the coppe ferrite CuFe2O4For ferrous acid copper nano particles,
The average grain diameter of the ferrous acid copper nano particles is 9nm~11nm, preferably 10nm.
Above-mentioned depth is gone in water removal in the method for arsenic, and the pH value of the arsenic-containing waste water controls in 3~8 ranges.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the pH value of the arsenic-containing waste water is controlled in 4~6 ranges
It is interior.
Above-mentioned depth is gone in water removal in the method for arsenic, and the temperature of the arsenic-containing waste water is 10 DEG C~40 DEG C.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the temperature of the arsenic-containing waste water is 20 DEG C~30 DEG C.
Above-mentioned depth goes that in water removal in the method for arsenic, trivalent arsenic and/or pentavalent arsenic are contained in the arsenic-containing waste water.
Above-mentioned depth is gone in water removal in the method for arsenic, a concentration of 5 μ g/L~1000 μ of trivalent arsenic in the arsenic-containing waste water
g/L。
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that a concentration of 20 μ g/ of trivalent arsenic in the arsenic-containing waste water
The μ of L~500 g/L.
Above-mentioned depth is gone in water removal in the method for arsenic, a concentration of 5 μ g/L~1000 μ of pentavalent arsenic in the arsenic-containing waste water
g/L。
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that a concentration of 20 μ g/ of pentavalent arsenic in the arsenic-containing waste water
The μ of L~500 g/L.
Above-mentioned depth is gone in water removal in the method for arsenic, it is preferred that the coppe ferrite and persulfate are added directly into and contain
In arsenic waste water.
In the present invention, CuFe2O4It is pentavalent arsenic to generate free radicals oxidation trivalent arsenic with persulfate compound system, generation
Pentavalent arsenic and residual trivalent arsenic are by CuFe2O4It adsorbs simultaneously.
The present invention uses coppe ferrite (CuFe2O4)/persulfate compound system（Alternatively referred to as compound or mixture）Containing
Arsenic is handled in arsenic waste water, by coppe ferrite (CuFe2O4)/persulfate is added directly into arsenic-containing waste water and is stirred.Ferrous acid
Copper (CuFe2O4The dosage of)/persulfate is depending on arsenic content in water.Removal effect is very within the scope of 3-8 by the pH of arsenic-containing waste water
It is good, optimum PH range 4-6.The temperature of arsenic-containing waste water effect of removing arsenic within the scope of 10-40 DEG C is fine, and optimum temperature range is
20-30℃。
In the present invention, Atomic Fluorescence Spectrometer detection can be used in the concentration of trivalent arsenic, and trivalent and the total arsenic concentration of pentavalent can be adopted
It is detected with inductively coupled plasma atomic emission spectrometer.
Compared with the prior art, the advantages of the present invention are as follows：
The present invention uses persulfate and coppe ferrite（CuFe2O4）Compound system deeply removing arsenic, without additional illumination, without adding
Heat, without adding auxiliary reagent, system itself can generate the free radical with Strong oxdiative ability, to aoxidize trivalent arsenic,
Coppe ferrite depth can adsorb trivalent and pentavalent arsenic in water simultaneously.Coppe ferrite can be detached with magnet adsorption, and non-secondary pollution uses alkali
It is reusable after washing.The rate of adsorption is fast, and the removal rate of arsenic can reach 99.9% or more in 40min at room temperature, residual arsenic
Concentration is less than 10 μ g/L（Initial concentration is 1000 μ g/L）, the discharge standard of arsenic-containing waste water is fully achieved.
The present invention method in background technology application No. is 201610876924.7 patent document compared with, there are essence
Difference：The first, the pH ranges that the method for the present invention is adapted to arsenic-containing waste water all have the effect for going arsenic removal very well in 3-8, will
The pH value of practical arsenic-containing waste water（Faintly acid, pH are less than or close to 7）Including within the scope of the pH, therefore, method of the invention can
To be directly used in practical arsenic-containing waste water processing；The second, method of the invention uses persulfate and coppe ferrite（Iron in coppe ferrite
For trivalent, cannot be aoxidized）Surface hydroxyl functional group reactions can generate strong oxidability peroxy radical in situ, can incite somebody to action
The big trivalent arsenic of toxicity is oxidized to the low pentavalent arsenic of toxicity, and Adsorption, and effect protrudes；Third goes arsenic removal principle different,
The patent document of the disclosure is direct flocculation sediment pentavalent arsenic, and method of the invention is that initial oxidation trivalent arsenic is pentavalent arsenic, then
Absorption can collect arsenic after absorption with alkali cleaning is de-, and adsorbent can reuse.
It is well known that persulfate is common oxidant, certain energy is provided in the external world（Such as heating, ultraviolet lighting）Or
Add reducing agent（Common is iron powder or ferrous salt）Under conditions of can generate Strong oxdiative hydroxyl radical free radical, to aoxidize trivalent
Arsenic, and go arsenic removal in conjunction with other techniques.Applicants have found that persulfate is providing energy situation with coppe ferrite without the external world
Under（Such as heating, ultraviolet lighting）A large amount of peroxy radicals can be generated, it is difficult to generate hydroxyl free（Because the iron in coppe ferrite is
Trivalent, cannot be by persulfate oxidation）, energy is provided without extraneous（Such as heating, ultraviolet lighting）It can generate free radicals, this is non-
Often be conducive to actual waste water treatment process.And whether the prior art is not studied when persulfate coexists with coppe ferrite and can be produced
Raw peroxy radical, mention in background technology application No. is 201710637495.2 patent documents also simply by changing iron
Sour copper pattern improves the absorption property of pentavalent arsenic, and handles waste water temperature at 50 DEG C or more, this is to extensive wastewater treatment
Technique is unpractical, and removal rate will reach 90% or more and at least need 3h.The method of the present invention is at ambient conditions（20~30
℃）Efficient oxidation and depth removal, the time that trivalent arsenic can be achieved at the same time are short（Removal efficiency is up to 99% or more in 40min）, have
Great novelty is expected to be used for the processing of practical arsenic-containing waste water on a large scale.Oxidation-absorption integral process research is also to contain arsenic at present
The research hotspot of field of waste water treatment, the proposition and realization of technical solution of the present invention have great social value and business valence
Value.
Description of the drawings
Fig. 1 is coppe ferrite CuFe in the embodiment of the present invention 12O4Transmission electron microscope picture.
Fig. 2 is coppe ferrite in the embodiment of the present invention 9 and potassium hydrogen peroxymonosulfate respectively at 10,20,30,40 DEG C to trivalent arsenic
Removal effect figure.Ordinate Ct/C0It indicates to remain arsenic concentration in the different disposal time（Ct）With arsenic initial concentration（C0）Ratio,
Ratio is smaller, and removal rate is higher.
Fig. 3 is that coppe ferrite and potassium hydrogen peroxymonosulfate are respectively 3.1,5.1,6.8,9.2,11 in pH in the embodiment of the present invention 10
Under to the removal effect figure of trivalent arsenic.Ordinate Ct/C0It indicates to remain arsenic concentration in the different disposal time（Ct）With arsenic initial concentration
（C0）Ratio, ratio is smaller, and removal rate is higher.
Fig. 4 is coppe ferrite in the embodiment of the present invention 11 and potassium hydrogen peroxymonosulfate to 5 removal effect figures recycled of trivalent arsenic.
Ordinate Ct/C0It indicates to remain arsenic concentration in the different disposal time（Ct）With arsenic initial concentration（C0）Ratio, ratio is smaller, removal
Rate is higher.
Fig. 5 is coppe ferrite and potassium hydrogen peroxymonosulfate system free radical detection figure in the embodiment of the present invention 12, and system generates strong
Strong free radical electron spin resonance signal.
Specific implementation mode
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Material and instrument employed in following embodiment are commercially available.
Embodiment 1：
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites CuFe2O4With 50 μ
Mol sodium persulfates are added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature
It is 25 DEG C, stirs 40min, completes the depth removal of arsenic in water.After testing it is found that 88% trivalent arsenic is oxidized to pentavalent arsenic, always
Arsenic removal rate（Discharge standard is weighed by total arsenic concentration）It is 97.2%.
In the present embodiment, coppe ferrite CuFe2O4For commercially available ferrous acid copper nano particles, particle mean size in 10nm or so,
Coppe ferrite CuFe2O4Transmission electron microscope picture it is as shown in Figure 1.
Embodiment 2
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 100 μm of ol mistakes
Two sodium sulphate are added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature 25
DEG C, 40min is stirred, the depth removal of arsenic in water is completed.After testing it is found that 92% trivalent arsenic is oxidized to pentavalent arsenic, total arsenic is gone
Except rate is 98.8%.
Embodiment 3
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 200 μm of ol mistakes
Two sodium sulphate are added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature 25
DEG C, 40min is stirred, the depth removal of arsenic in water is completed.After testing it is found that 98.7% trivalent arsenic is oxidized to pentavalent arsenic, total arsenic
Removal rate is 99.9%.
Embodiment 4
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 300 μm of ol mistakes
Two sodium sulphate are added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature 25
DEG C, 40min is stirred, the depth removal of arsenic in water is completed.After testing it is found that 99.9% trivalent arsenic is oxidized to pentavalent arsenic, total arsenic
Removal rate is 100%.
Embodiment 5
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 200 μm of ol mistakes
One potassium sulfate is added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature 25
DEG C, 40min is stirred, the depth removal of arsenic in water is completed.After testing it is found that 97.9% trivalent arsenic is oxidized to pentavalent arsenic, total arsenic
Removal rate is 100%.
Embodiment 6
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 200 μm of ol mistakes
Two ammonium sulfate are added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature 25
DEG C, 40min is stirred, the depth removal of arsenic in water is completed.After testing it is found that 96.3% trivalent arsenic is oxidized to pentavalent arsenic, total arsenic
Removal rate is 99.6%.
Embodiment 7
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 200 μm of ol mistakes
One niter cake is added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, and temperature is
25 DEG C, 40min is stirred, completes the depth removal of arsenic in water.After testing it is found that 98.3% trivalent arsenic is oxidized to pentavalent arsenic, always
Arsenic removal rate is 99.8%.
Embodiment 8
A kind of method that the depth of the present invention removes arsenic in water removal, includes the following steps：By 100 μm of ol coppe ferrites and 200 μm of ol mistakes
One potassium acid sulfate is added in the waste water containing trivalent arsenic that volume is 1L, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, and temperature is
25 DEG C, 40min is stirred, completes the depth removal of arsenic in water.After testing it is found that 99.6% trivalent arsenic is oxidized to pentavalent arsenic, always
Arsenic removal rate is 100%.
Influence of 9 temperature of embodiment to removal rate
A kind of method that the depth of the present invention removes arsenic in water removal, 100 μm of ol coppe ferrites and 200 μm of ol potassium hydrogen peroxymonosulfates are added
In the waste water containing trivalent arsenic for being 1L to volume, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature is 10 DEG C~40 DEG C, stirring
40min.The results are shown in Figure 2, and within the scope of 10 DEG C~40 DEG C, arsenic removal rate is 99.8% or more, wherein in 20 DEG C and 30 DEG C
When, total arsenic removal rate is 99.9% or more.
Influence of 10 pH value of solution of embodiment to removal rate
A kind of method that the depth of the present invention removes arsenic in water removal, 100 μm of ol coppe ferrites and 200 μm of ol potassium hydrogen peroxymonosulfates are added
In the waste water containing trivalent arsenic for being 1L to volume, trivalent arsenic a concentration of 1000 μ g/L, pH are 3.1~11, and temperature is 25 DEG C, stirring
40min.The results are shown in Figure 3, coppe ferrite and potassium hydrogen peroxymonosulfate be respectively 3.1,5.1,6.8,9.2,11 in pH under to trivalent
Arsenic removes, and for pH in 3.1~6.8 range, total arsenic removal rate is 99.9% or more.
11 coppe ferrite reusability of embodiment
A kind of method that the depth of the present invention removes arsenic in water removal, 100 μm of ol coppe ferrites and 200 μm of ol potassium hydrogen peroxymonosulfates are added
In the waste water containing trivalent arsenic for being 1L to volume, a concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature is 25 DEG C, stirs 40min.
40min is often reacted, coppe ferrite is separated with magnet adsorption, is washed with 0.1M NaOH solutions, until not having arsenic in cleaning solution.
Again by washed coppe ferrite and potassium hydrogen peroxymonosulfate（200µmol）It rejoins in the waste water containing trivalent arsenic that volume is 1L,
A concentration of 1000 the μ g/L, pH 5 of trivalent arsenic, temperature are 25 DEG C, stir 40min.It operates, is repeated 5 times repeatedly, as a result such as Fig. 4
Shown, total arsenic removal rate is 99.6% or more every time.
12 free radical of embodiment detects
By 100 μm of ol coppe ferrites and 200 μm of ol potassium hydrogen peroxymonosulfates（PMS）It is added in the deionized water that volume is 1L, pH is
5, temperature is 25 DEG C, stirs 1min.With 5,5- dimethyl -1- pyrrolins nitrogen oxides (DMPO) for peroxy radical probe, detection
The electron spin resonance signal of free radical, the results are shown in Figure 5, and system generates strong free radical electron spin resonance signal.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example.All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It is noted that for the art
Those of ordinary skill for, improvements and modifications without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method that depth removes arsenic in water removal, which is characterized in that the method includes by coppe ferrite CuFe2O4And persulfuric acid
The compound system of salt composition is added in arsenic-containing waste water, removes the arsenic in water removal with depth, wherein mole of coppe ferrite and persulfate
Than being 1~5: 1~15.
2. the method that depth according to claim 1 removes arsenic in water removal, which is characterized in that the persulfate included one
Sulfate and/or peroxydisulfate.
3. the method that depth according to claim 2 removes arsenic in water removal, which is characterized in that the peroxy-monosulfate included
It is one or more in one sodium sulphate, permonosulphuric acid potassium, hydrogen peroxymonosulfate sodium and potassium hydrogen peroxymonosulfate.
4. the method that depth according to claim 2 removes arsenic in water removal, which is characterized in that the peroxydisulfate included
It is one or more in two sodium sulphate, potassium persulfate, ammonium peroxydisulfate, peroxy-disulfuric acid hydrogen sodium and peroxy-disulfuric acid hydrogen potassium.
5. the method that depth according to claim 1 removes arsenic in water removal, which is characterized in that the coppe ferrite CuFe2O4For iron
The average grain diameter of sour copper nano particles, the ferrous acid copper nano particles is 9nm~11nm.
6. the method that depth according to any one of claims 1 to 5 removes arsenic in water removal, which is characterized in that described to contain arsenic
The pH value of waste water controls in 3~8 ranges；And/or the temperature of the arsenic-containing waste water is 10 DEG C~40 DEG C.
7. the method that depth according to claim 6 removes arsenic in water removal, which is characterized in that the pH value control of the arsenic-containing waste water
System is in 4~6 ranges；And/or the temperature of the arsenic-containing waste water is 20 DEG C~30 DEG C.
8. the method that depth according to any one of claims 1 to 5 removes arsenic in water removal, which is characterized in that described to contain arsenic
Contain trivalent arsenic and/or pentavalent arsenic in waste water.
9. the method that depth according to claim 8 removes arsenic in water removal, which is characterized in that trivalent arsenic in the arsenic-containing waste water
A concentration of 5 μ g/L~1000 μ g/L, and/or, a concentration of 5 μ μ of g/L~1000 g/L of pentavalent arsenic in the arsenic-containing waste water.
10. the method that depth according to any one of claims 1 to 5 removes arsenic in water removal, which is characterized in that the ferrous acid
Copper CuFe2O4It is added directly into arsenic-containing waste water with persulfate.
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| CN111333168A (en) * | 2020-02-17 | 2020-06-26 | 哈尔滨工业大学 | Method for removing organic arsenic in water by synchronous oxidation and in-situ adsorption |
| CN114015898A (en) * | 2021-11-01 | 2022-02-08 | 中国科学院过程工程研究所 | Method for enhanced leaching of arsenic in copper arsenic filter cake |
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