CN103342410B - Water treatment method for removing arsenic by strengthening zero-valent iron - Google Patents
Water treatment method for removing arsenic by strengthening zero-valent iron Download PDFInfo
- Publication number
- CN103342410B CN103342410B CN201310315731.0A CN201310315731A CN103342410B CN 103342410 B CN103342410 B CN 103342410B CN 201310315731 A CN201310315731 A CN 201310315731A CN 103342410 B CN103342410 B CN 103342410B
- Authority
- CN
- China
- Prior art keywords
- arsenic
- zero
- water
- valent iron
- persulphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 99
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005728 strengthening Methods 0.000 title claims abstract description 22
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 70
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000010865 sewage Substances 0.000 claims abstract description 4
- 239000003814 drug Substances 0.000 claims description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 14
- 239000011734 sodium Substances 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 239000011575 calcium Substances 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 12
- 229910052749 magnesium Inorganic materials 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- 238000005660 chlorination reaction Methods 0.000 claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims description 8
- 235000019394 potassium persulphate Nutrition 0.000 claims description 7
- 239000004159 Potassium persulphate Substances 0.000 claims description 6
- JZBWUTVDIDNCMW-UHFFFAOYSA-L dipotassium;oxido sulfate Chemical compound [K+].[K+].[O-]OS([O-])(=O)=O JZBWUTVDIDNCMW-UHFFFAOYSA-L 0.000 claims description 6
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000001764 infiltration Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000003651 drinking water Substances 0.000 abstract description 7
- 235000020188 drinking water Nutrition 0.000 abstract description 7
- 239000003673 groundwater Substances 0.000 abstract description 7
- 238000000151 deposition Methods 0.000 abstract 1
- 231100000086 high toxicity Toxicity 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000011026 diafiltration Methods 0.000 description 4
- -1 hydroxyl radical free radical Chemical class 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005067 remediation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 2
- 238000009303 advanced oxidation process reaction Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000003918 potentiometric titration Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- JRIGVWDKYXCHMG-UHFFFAOYSA-N (5-arsoroso-2-hydroxyphenyl)azanium;chloride Chemical compound Cl.NC1=CC([As]=O)=CC=C1O JRIGVWDKYXCHMG-UHFFFAOYSA-N 0.000 description 1
- 208000005735 Water intoxication Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910000413 arsenic oxide Inorganic materials 0.000 description 1
- 229960002594 arsenic trioxide Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- KTTMEOWBIWLMSE-UHFFFAOYSA-N diarsenic trioxide Chemical compound O1[As](O2)O[As]3O[As]1O[As]2O3 KTTMEOWBIWLMSE-UHFFFAOYSA-N 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 208000004296 neuralgia Diseases 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229950008475 oxophenarsine Drugs 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a technology for removing and controlling arsenic which has very high toxicity in water, and discloses a water treatment method for removing arsenic by strengthening zero-valent iron, which can be used for groundwater repair, drinking water treatment, industrial arsenic-containing wastewater treatment, sewage deep treatment and integrated small-scale water treatment systems. The water treatment method specifically comprises the following steps of: adding persulfate and zero-valent iron into water containing arsenic, wherein the persulfate is added in a molar ratio of the persulfate to arsenic of (5:1)-(100:1), and the molar ratio of the zero-valent iron to the persulfate in the water is (1:1)-(10:1); and when the mixed solution is fully mixed, filtering or depositing to finish the removal of arsenic. The water treatment method is very simple to operate, easy to popularize and apply and safe to use, and can be used for ensuring the water quality safety.
Description
Technical field
The present invention relates to removal and the control techniques of the very large arsenic of water intoxication, more specifically, a kind of water treatment method of strengthening Zero-valent Iron arsenic removal that can be used for groundwater remediation, drinking water treatment, industrial arsenic-containing waste water process, advanced treatment of wastewater and integrated miniature water treatment system is related to.
Background technology
Arsenic and species of Arsenic is typical " three cause " material, and long-term drinking height arsenic water can cause black leg, neurodynia, blood vessel injury and increase heart disease rate.Tens provinces, the autonomous regions such as Xinjiang, Shanxi, the Inner Mongol, Jilin, Ningxia, Qinghai of China have found tap water arseniasis, and pollution situation is very serious, and wherein the pollution of arsenic from underwater is particularly serious, and the arsenic also existed in surface water in various degree pollutes.In natural water, arsenic mainly exists with As (III) and As (V) two kinds of forms, and the toxicity ratio As (V) of As (III) exceeds 60 times.The limit value concentration of " drinking water sanitary standard " regulation arsenic that China promulgates for 2006 is 10 μ g/L, but according to the monitoring result of Environmental Sanitation Inst., China Preventive Medical Science Academy, the exposed population group that in Drinking Water in China, the concentration of arsenic exceedes this limit value exceedes survey group's 15%.Therefore, the arsenic removal technology developing efficient economy is current water treatment field problem demanding prompt solution.
In water conventional at present, arsenic removal process can be divided into coagulant sedimentation, ion exchange method, reverse osmosis method and absorption method.Coagulant sedimentation arsenic removal is easy, easy to implement, match with oxygenant, also can remove the As (III) in water and As (V) simultaneously, but this method is difficult to the concentration of arsenic in water to drop to qualified discharge, and a large amount of arsenic-containing waste residues can be produced, cause the secondary pollution to environment.Ion exchange method arsenic removal efficiency is usually not high, because other ionic concns can competed with arsenic are usually far away higher than the concentration of arsenic.Reverse osmosis process effect of removing arsenic is good, but this technique is very expensive, and needs pre-treatment.Absorption method is when the water that process arsenic content is lower, there is the advantages such as processing efficiency is high, adsorptive hindrance is little, and sorbent material can regenerate and reuses, secondary pollution can not be caused to environment, shortcoming is that action time is longer, processing costs is higher, and undesirable to the treatment effect of As (III).
Zero-valent Iron is a kind of functional, cheap arsenic-removing adsorption agent, abroad large-scale application in groundwater remediation.Zero-valent Iron is comparatively strong to the adsorptive power of As (V), but general to the removal effect of As (III).Meanwhile, Zero-valent Iron has reducing power, under anoxic conditions, As (V) can be reduced to As (III), be unfavorable for the removal of arsenic.Therefore, As (III) being oxidized to As (V) is the key factor effectively removing arsenic.
Utilizing advanced oxidation processes, As (III) is oxidized to As (V), is the effective approach improving Zero-valent Iron effect of removing arsenic.Meanwhile, the free radical produced in advanced oxidation processes, can be the ferriferous oxide of nascent state by Zero-valent Iron surface oxidation fast, these ferriferous oxides have higher arsenic loading capacity compared to Zero-valent Iron.
In sum, be necessary very much to research and develop a kind of can effectively, economy, safe strengthening Zero-valent Iron arsenic removal water technology, this technology not only can be used for groundwater remediation and drinking water treatment, can also be used for industrial arsenic-containing waste water process, advanced treatment of wastewater and integrated miniature water treatment system.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes a kind of water treatment method strengthening Zero-valent Iron arsenic removal, method of the present invention efficiently can remove the arsenic in water, wherein arsenic comprises As (III), As (V) and organoarsenic, reach the standard that " drinking water sanitary standard " specifies arsenic, lower than 10 μ g/L.
To achieve these goals, technical scheme of the present invention is:
A kind of water treatment method strengthening Zero-valent Iron arsenic removal, persulphate and Zero-valent Iron is added to containing in the water of arsenic, the dosage of persulphate is that 5:1 ~ 100:1 adds by the mol ratio of itself and arsenic, in water, the mol ratio of Zero-valent Iron and persulphate is 1:1 ~ 10:1, and the abundant hybrid filtering of liquid to be mixed or precipitation complete the removal of arsenic.
Further, described persulphate be in Potassium Persulphate/sodium/ammonium/calcium/magnesium/ammonium and Potassium peroxysulfate/sodium/ammonium/calcium/magnesium/ammonium any one or multiple.
In order to strengthen the removal effect of arsenic, also adding persulphate work in coordination with medicament containing in the water of arsenic, described persulphate work in coordination with that medicament comprises in chlorination/nitric acid/ferrous sulfate and chlorination/nitric acid/ferric sulfate one or more; The described persulphate dosage of working in coordination with medicament is 0.1:1 ~ 1:1 by the mol ratio of itself and persulphate dosage.
Principle of the present invention is, by adding persulphate and the arsenic removal of its collaborative medicament strengthening Zero-valent Iron, Zero-valent Iron can produce the potentiometric titrations (SO of strong oxidizing property by catalysis persulphate
4 –), its redox potential is 2.5 – 3.1 V, under neutral or basic conditions higher than hydroxyl radical free radical (OH) (1.9 – 2.0 V), close with OH (2.4 – 2.7 V) in acid condition.SO
4 –efficiently rapidly the As (III) in water can be oxidized to As (V), meanwhile, Zero-valent Iron surface is by persulphate and SO
4 –be oxidized to nascent state ferric oxide, As (V) can be adsorbed more efficiently.Persulphate is worked in coordination with the iron ion in medicament and can be promoted that persulphate decomposes faster adding of ferrous ion, produces more SO
4 –, thus make the degradation speed of As (III) faster.The present invention can remove arsenic in water completely, improves 50 ~ 100% than the efficiency of existing Zero-valent Iron absorption arsenic removal.SO is produced after potentiometric titrations arsenic oxide arsenoxide
4 2-, little to water quality impact.
As(III) + SO
4 ·–→ As(IV) + SO
4 2–
As(IV) + SO
4 ·–→ As(V) + SO
4 2–
As(IV) + O
2+ H
+→ As(V) + HO
2/O
2 –
Further, described Zero-valent Iron is: powder Zero-valent Iron, Zero-valent Iron filter post or Zero-valent Iron infiltration wall.Zero-valent Iron can adopt the iron waste of commercially available Zero-valent Iron, nano zero valence iron or source mill, as: filings, chip, shavings and iron powder etc.; Hybrid reaction mode comprises tube mixer mixing, and stirring rake stirs, hydraulic mixing etc.
Further, the described water containing arsenic is one or more in underground water, tap water, industrial arsenic-containing waste water, sewage or integration of compact water.The present invention not only can be used in the reparation of rural area and urban groundwater, the removal of Arsenic in Drinking Water, can also be used for the removal of arsenic in sewage and trade effluent.According to different water bodys, according to water quality requirement and design specifications, different reactor configuration and dosages distribution can be designed, reach the object removing arsenic in water fast.
Further, the described content containing the arsenic in the water of arsenic is: 0 ~ 1 g/L.
Further, the dosing method of the collaborative medicament of described persulphate and persulphate is that solid powder adds or solution form adds.
Further, any pH scope of the described water PH > 2 containing arsenic, if pH is too little, Zero-valent Iron has all been dissolved, and is not suitable for processing by Zero-valent Iron.The present invention all has good degradation effect to the arsenic in any water body under pH> 2 condition, during practical application, can according to different water quality characteristics, and regulating agent throwing amount, reaches removing the most fast of arsenic.
Compared with prior art, beneficial effect of the present invention: the present invention's operation is very simple, is easy to apply; Use safety, may be used for ensureing water quality safety.
Accompanying drawing explanation
Fig. 1 is the removal effect figure of the embodiment of the present invention 3 pairs of As (III).
Fig. 2 is the removal effect figure of the embodiment of the present invention 3 pairs of As (V).
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but embodiments of the present invention are not limited to this.
Embodiment one
Present embodiment " a kind of water treatment method strengthening Zero-valent Iron arsenic removal " is carried out by the following method: add persulphate and Zero-valent Iron to containing in the water of arsenic, the mol ratio of Zero-valent Iron and persulphate in water is made to be 1:1 ~ 10:1, the mol ratio of persulphate and arsenic is 5:1 ~ 100:1, then by mixing solutions with the speed stirring reaction 5-60 min of 50 ~ 300 revs/min, filter and namely complete the removal of As.
The water that present embodiment contains arsenic refers to containing the underground water of one or more in As (III), As (IV) and organoarsenic or surface water.Persulphate is Potassium Persulphate (sodium, ammonium, calcium, magnesium), Potassium peroxysulfate (sodium, ammonium, calcium, magnesium).Zero-valent Iron can adopt the iron waste of commercially available Zero-valent Iron, nano zero valence iron or source mill, as filings, chip, shavings and iron powder etc.
Embodiment two
Present embodiment and embodiment one, unlike except adding persulphate, add the collaborative medicament of persulphate simultaneously, the collaborative medicament of persulphate be one or more in (chlorination, nitric acid, sulfuric acid) ferrous iron/iron.Other are identical with embodiment one.
In present embodiment, it is 0.1:1 ~ 1:1 that persulphate works in coordination with the dosage of medicament with the molar equivalent ratio of the dosage of persulphate.
Embodiment three
This embodiment one " a kind of water treatment method strengthening Zero-valent Iron arsenic removal " is carried out by the following method: add persulphate to containing in the water of arsenic, and fully mix, the mol ratio of persulphate and arsenic is made to be 5:1 ~ 100:1, then by the filter post of mixing solutions by taking Zero-valent Iron as main component, the strengthening namely completing As after filtration is removed.
The water that present embodiment contains arsenic refers to containing the underground water of one or more in As (III), As (IV) and organoarsenic or surface water.Persulphate is Potassium Persulphate (sodium, ammonium, calcium, magnesium), Potassium peroxysulfate (sodium, ammonium, calcium, magnesium).Zero-valent Iron can adopt the iron waste of commercially available Zero-valent Iron, source mill, as filings, chip, shavings and iron powder etc.
Fig. 1 is the removal effect figure of this embodiment to As (III), and water used is laboratory water distribution, adds As (III) and makes its concentration be 0.8 mg/L (10 μMs), and adopt NaHCO in pure water
3, HCl and NaOH adjust ph is neutral, then add 100 μMs of Sodium Persulfates and mix, then filter through Zero-valent Iron filter post; Run one group of Control release in addition, condition is similar, and difference is not add Sodium Persulfate.Wherein left side histogram is the clearance of independent Zero-valent Iron to arsenic, and the histogram on the right is that persulphate strengthening Zero-valent Iron is to the clearance of arsenic.
Fig. 2 is the removal effect figure of present embodiment to As (V), and water used is laboratory water distribution, adds As (V) and makes its concentration be 0.8 mg/L (10 μMs), and adopt NaHCO in pure water
3, HCl and NaOH adjust ph is neutral, then add or do not add 100 μMs of Potassium Persulphates and receive and mix, then filter through Zero-valent Iron filter post; Run one group of Control release in addition, condition is similar, and difference is not add Sodium Persulfate.Wherein left side histogram is the clearance of Zero-valent Iron to arsenic, and the histogram on the right is that persulphate strengthening Zero-valent Iron is to the clearance of arsenic.
Embodiment four
Present embodiment and embodiment three are unlike except adding persulphate, add the collaborative medicament of persulphate: one or more in (chlorination, nitric acid, sulfuric acid) ferrous iron/iron simultaneously, make the collaborative medicament of persulphate, persulphate and arsenic Homogeneous phase mixing react 2 ~ 10 min, then flow through Zero-valent Iron filter post.Other are identical with embodiment.
In present embodiment, it is 0.1:1 ~ 1:1 that persulphate works in coordination with the dosage of medicament with the molar equivalent ratio of the dosage of persulphate.
Embodiment five
Present embodiment " a kind of water treatment method strengthening Zero-valent Iron arsenic removal " is carried out by the following method: persulfate solution is injected in the upstream to the underground water original position diafiltration wall taking Zero-valent Iron as main component, make persulfate solution and contain As groundwater Homogeneous phase mixing, when the groundwater flow containing arsenic and persulphate is through original position diafiltration wall, the strengthening namely completing arsenic is removed.In present embodiment, the mol ratio of persulphate and arsenic is 5:1 ~ 100:1.
The water that present embodiment contains arsenic refers to containing the underground water of one or more in As (III), As (IV) and organoarsenic.Persulphate is Potassium Persulphate (sodium, ammonium, calcium, magnesium), Potassium peroxysulfate (sodium, ammonium, calcium, magnesium).Zero-valent Iron can adopt the iron waste of commercially available Zero-valent Iron, source mill, as filings, chip, shavings and iron powder etc.
Embodiment six
Present embodiment and embodiment five are unlike the upstream at Zero-valent Iron original position diafiltration wall, except adding persulphate, add the collaborative medicament of persulphate: one or more in (chlorination, nitric acid, sulfuric acid) ferrous iron/iron simultaneously, make the arsenic Homogeneous phase mixing in the collaborative medicament of persulphate, persulphate and underground water react 2 ~ 10min, then flow through original position diafiltration wall.Other are identical with embodiment three.
In the present embodiment, persulphate works in coordination with the dosage of medicament with the molar equivalent ratio of the dosage of persulphate is 0.1:1 ~ 1:1.
Embodiment seven
Present embodiment " a kind of water treatment method strengthening Zero-valent Iron arsenic removal " is carried out by the following method: in the underground water polluted by arsenic, set up active reaction region, Zero-valent Iron and persulphate is added in active reaction region, the mol ratio of Zero-valent Iron and persulphate in water is made to be 1:1 ~ 10:1, the mol ratio of persulphate and arsenic is 5:1 ~ 100:1, hybrid reaction 5-60 min, namely completes the removal of arsenic after precipitation.Persulphate is Potassium Persulphate (sodium, ammonium, calcium, magnesium), Potassium peroxysulfate (sodium, ammonium, calcium, magnesium).Zero-valent Iron can adopt the iron waste of nano zero valence iron, commercially available Zero-valent Iron or source mill, as filings, chip, shavings and iron powder etc.
Embodiment eight
Present embodiment and embodiment seven are unlike except adding persulphate, add the collaborative medicament of persulphate: one or more in (chlorination, nitric acid, sulfuric acid) ferrous iron/iron simultaneously, make the arsenic in the collaborative medicament of persulphate, persulphate, Zero-valent Iron and underground water react 5 ~ 60 min, after precipitation, namely complete the removal of arsenic.
In present embodiment, it is 0.1:1 ~ 1:1 that persulphate works in coordination with the dosage of medicament with the molar equivalent ratio of the dosage of persulphate.
Above-described embodiments of the present invention, do not form limiting the scope of the present invention.Any amendment done within spiritual principles of the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (7)
1. strengthen the water treatment method of Zero-valent Iron arsenic removal for one kind, it is characterized in that, persulphate and Zero-valent Iron is added to containing in the water of arsenic, the dosage of persulphate is that 5:1 ~ 100:1 adds by the mol ratio of itself and arsenic, in water, the mol ratio of Zero-valent Iron and persulphate is 1:1 ~ 10:1, and the abundant hybrid filtering of liquid to be mixed or precipitation complete the removal of arsenic;
Also comprise and add persulphate work in coordination with medicament to containing in the water of arsenic, described persulphate work in coordination with that medicament comprises in chlorination/nitric acid/ferrous sulfate and chlorination/nitric acid/ferric sulfate one or more; The described persulphate dosage of working in coordination with medicament is 0.1:1 ~ 1:1 by the mol ratio of itself and persulphate dosage.
2. the water treatment method of strengthening Zero-valent Iron according to claim 1 arsenic removal, is characterized in that, described persulphate be in Potassium Persulphate/sodium/ammonium/calcium/magnesium and Potassium peroxysulfate/sodium/ammonium/calcium/magnesium any one or multiple.
3. the water treatment method of strengthening Zero-valent Iron according to claim 2 arsenic removal, is characterized in that, described Zero-valent Iron is: powder Zero-valent Iron, Zero-valent Iron filter post or Zero-valent Iron infiltration wall.
4. the water treatment method of strengthening Zero-valent Iron according to claim 3 arsenic removal, is characterized in that, the described water containing arsenic is one or more in underground water, tap water, industrial arsenic-containing waste water, sewage or integration of compact water.
5. the water treatment method of strengthening Zero-valent Iron according to claim 4 arsenic removal, is characterized in that, the described content containing the arsenic in the water of arsenic is: 0 ~ 1 g/L, does not comprise 0.
6. the water treatment method of strengthening Zero-valent Iron according to claim 2 arsenic removal, is characterized in that, the dosing method of the collaborative medicament of described persulphate and persulphate is that solid powder adds or solution form adds.
7. the water treatment method of strengthening Zero-valent Iron according to claim 6 arsenic removal, is characterized in that, the PH of the described water containing arsenic be greater than 2 any pH scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310315731.0A CN103342410B (en) | 2013-07-25 | 2013-07-25 | Water treatment method for removing arsenic by strengthening zero-valent iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310315731.0A CN103342410B (en) | 2013-07-25 | 2013-07-25 | Water treatment method for removing arsenic by strengthening zero-valent iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103342410A CN103342410A (en) | 2013-10-09 |
| CN103342410B true CN103342410B (en) | 2015-03-25 |
Family
ID=49277252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310315731.0A Active CN103342410B (en) | 2013-07-25 | 2013-07-25 | Water treatment method for removing arsenic by strengthening zero-valent iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103342410B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015070199A1 (en) * | 2013-11-11 | 2015-05-14 | Peroxychem Llc | Treatment of arsenic contaminated soil and water |
| CN104276646B (en) * | 2014-01-21 | 2016-10-05 | 北京师范大学 | A kind of method rapidly and efficiently removing Heavy Metals in Waters |
| CN104176812A (en) * | 2014-08-16 | 2014-12-03 | 复旦大学 | Sewage treatment method and device by taking zero-valent iron powder as carrier |
| CN105198067A (en) * | 2015-09-30 | 2015-12-30 | 中山大学 | Method for treating water by using zero-valent iron-nickel bi-metal activated persulfate |
| CN105964225A (en) * | 2016-07-05 | 2016-09-28 | 江苏省海洋资源开发研究院(连云港) | Adsorbent, preparation method thereof and application of adsorbent in removal of low-concentration arsenic in underground water |
| CN106422151B (en) * | 2016-08-24 | 2019-07-12 | 航天凯天环保科技股份有限公司 | A kind of cured method of realization High Concentration of Arsenic alkaline residue stabilisation |
| CN106277267A (en) * | 2016-09-30 | 2017-01-04 | 天津师范大学 | Ferrum element is the application of arsenic in removing water |
| CN106315811A (en) * | 2016-09-30 | 2017-01-11 | 天津师范大学 | Application of iron ions in removal of arsenic from water |
| CN108101188A (en) * | 2017-12-28 | 2018-06-01 | 吉林建筑大学 | A kind of method for removing arsenic in water removal using sulphite reinforcing manganese sand |
| CN107973364A (en) * | 2017-12-28 | 2018-05-01 | 吉林建筑大学 | A kind of method for removing arsenic in water removal using single persulfate reinforcing manganese sand |
| CN108178277A (en) * | 2017-12-28 | 2018-06-19 | 吉林建筑大学 | A kind of method for removing selenium in water removal using sulphite reinforcing manganese sand |
| CN108128880A (en) * | 2017-12-28 | 2018-06-08 | 吉林建筑大学 | A kind of method for removing antimony in water removal using sulphite reinforcing manganese sand |
| CN108083379A (en) * | 2017-12-28 | 2018-05-29 | 吉林建筑大学 | A kind of method for removing selenium in water removal using single persulfate reinforcing manganese sand |
| CN108002511A (en) * | 2017-12-28 | 2018-05-08 | 吉林建筑大学 | A kind of method for treating water that single persulfate oxidation degradable organic pollutant is catalyzed using manganese sand |
| CN108163958A (en) * | 2017-12-28 | 2018-06-15 | 吉林建筑大学 | A kind of method for removing antimony in water removal using single persulfate reinforcing manganese sand |
| CN108163960A (en) * | 2017-12-28 | 2018-06-15 | 吉林建筑大学 | A kind of method for removing manganese ion in water removal using single persulfate reinforcing manganese sand |
| CN108383229A (en) * | 2017-12-28 | 2018-08-10 | 深圳职业技术学院 | A method of strengthening manganese sand using sulphite and removes thallium in water removal |
| CN108946908B (en) * | 2018-07-20 | 2022-02-01 | 中山大学 | Water treatment method for removing micropollutants by activating persulfate |
| CN109292951B (en) * | 2018-09-19 | 2021-04-02 | 合肥学院 | By using MnOX/Fe0Method for treating organic wastewater by activating persulfate through nano composite material |
| CN111003864B (en) * | 2018-10-08 | 2022-01-04 | 昆明理工大学 | Method for removing arsenic in ultrasonic-enhanced contaminated acid |
| 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 |
| CN112174288A (en) * | 2020-10-09 | 2021-01-05 | 广东石油化工学院 | Method for degrading organic pollutants by iron salt-zero-valent iron concerted catalysis |
| CN112705160A (en) * | 2020-11-17 | 2021-04-27 | 扬州大学 | Ordered mesoporous carbon loaded zero-valent iron composite material and preparation method and application thereof |
| CN113617822B (en) * | 2021-08-24 | 2022-07-26 | 江苏省环境科学研究院 | Heavy metal polluted foundation soil restoration and safe reuse method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6932909B2 (en) * | 2002-01-15 | 2005-08-23 | Kroff Chemical Company, Inc. | Method of treating mine drainage |
| JP2007038113A (en) * | 2005-08-02 | 2007-02-15 | Kobe Steel Ltd | Organic arsenic compound-containing water treatment method |
| CN101139150A (en) * | 2007-08-15 | 2008-03-12 | 哈尔滨工业大学 | Preoxidized-composite electrolyzing method for removing arsenic in groundwater |
| CN102642951A (en) * | 2012-05-07 | 2012-08-22 | 哈尔滨工程大学 | Method combining oxidizing composite reagent and activated carbon to remove arsenic in water |
| CN102910709A (en) * | 2012-11-01 | 2013-02-06 | 中国地质大学（武汉） | In-situ remediation method for organic contaminated underground water |
| CN102992467A (en) * | 2012-12-10 | 2013-03-27 | 复旦大学 | Sewage treatment method adopting zero-valent scrap as carrier |
-
2013
- 2013-07-25 CN CN201310315731.0A patent/CN103342410B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6932909B2 (en) * | 2002-01-15 | 2005-08-23 | Kroff Chemical Company, Inc. | Method of treating mine drainage |
| JP2007038113A (en) * | 2005-08-02 | 2007-02-15 | Kobe Steel Ltd | Organic arsenic compound-containing water treatment method |
| CN101139150A (en) * | 2007-08-15 | 2008-03-12 | 哈尔滨工业大学 | Preoxidized-composite electrolyzing method for removing arsenic in groundwater |
| CN102642951A (en) * | 2012-05-07 | 2012-08-22 | 哈尔滨工程大学 | Method combining oxidizing composite reagent and activated carbon to remove arsenic in water |
| CN102910709A (en) * | 2012-11-01 | 2013-02-06 | 中国地质大学（武汉） | In-situ remediation method for organic contaminated underground water |
| CN102992467A (en) * | 2012-12-10 | 2013-03-27 | 复旦大学 | Sewage treatment method adopting zero-valent scrap as carrier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103342410A (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103342410B (en) | Water treatment method for removing arsenic by strengthening zero-valent iron | |
| CN103991987B (en) | A kind of pretreatment high phosphorus waste water removes technique and the process system thereof of total phosphorus | |
| CN106007080B (en) | A kind of method of biochemical tail water step oxidation depth purification | |
| CN105645545B (en) | Preparation method and application of polysilicate iron salt coagulant | |
| CN102642951B (en) | Method combining oxidizing composite reagent and activated carbon to remove arsenic in water | |
| CN104891719A (en) | Method for pre-treating organic industrial wastewater based on ferric-carbon micro-electrolysis activated persulfate | |
| CN107311291A (en) | The method of sulfite oxidation degraded organic pollutants is combined using heterogeneous iron-based material under aeration condition | |
| CN102627360B (en) | Method for pretreatment on industrial wastewater by nascent state ferrous iron reduction | |
| CN103351046B (en) | Wastewater treatment agent, preparation method thereof and wastewater treatment method | |
| CN103626340B (en) | Treatment method for water of molybdenum-containing water source | |
| CN105060557A (en) | New method for simultaneously and efficiently removing thallium and arsenic from smelting wastewater | |
| CN106007076A (en) | Treatment method of arsenic-containing wastewater in tungsten smelting | |
| CN105152406A (en) | Process for treating biochemical tail water landfill leachate by combining coagulation, oxidation and adsorption | |
| CN105417782A (en) | Method for using steel slag micro-powder as crystal nucleuses to strengthen wastewater phosphorous removal | |
| CN106336038B (en) | A kind of processing method containing heavy metal polluted waste water | |
| CN106673277A (en) | Technical scheme applied to advanced treatment for fracturing flow-back fluid of oil-gas field to achieve standard discharge | |
| CN106007265A (en) | Advanced treatment method of chemical industry pharmaceutical wastewater biochemical tail water | |
| CN101497032A (en) | Method for preparing biological sorbent and method of use thereof | |
| CN112159025A (en) | Treatment method and application of hexavalent chromium-containing wastewater | |
| CN103641227A (en) | Method for eliminating heavy metal in industrial sewage | |
| CN106745630A (en) | A kind of composite dephosphorizing agent | |
| CN210764765U (en) | Novel wastewater treatment device | |
| CN104944564B (en) | A kind of remove the preparation method of the reducing agent of nitrate in water | |
| CN106241996A (en) | Vessel slag purposes in preparing sewage containing copper inorganic agent | |
| CN104445715B (en) | Treatment method for removing high-concentration nickel-containing electroplating wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |