CN113105046A - Method for synchronously removing organic pollutants and suspended matters in water - Google Patents
Method for synchronously removing organic pollutants and suspended matters in water Download PDFInfo
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- CN113105046A CN113105046A CN202110469900.0A CN202110469900A CN113105046A CN 113105046 A CN113105046 A CN 113105046A CN 202110469900 A CN202110469900 A CN 202110469900A CN 113105046 A CN113105046 A CN 113105046A
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- 239000002957 persistent organic pollutant Substances 0.000 title claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims description 52
- 238000006243 chemical reaction Methods 0.000 claims description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 12
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 8
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000004128 high performance liquid chromatography Methods 0.000 claims description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 7
- 229910052753 mercury Inorganic materials 0.000 claims description 7
- 229940106691 bisphenol a Drugs 0.000 claims description 6
- 239000003242 anti bacterial agent Substances 0.000 claims description 4
- 229940088710 antibiotic agent Drugs 0.000 claims description 4
- 229940123317 Sulfonamide antibiotic Drugs 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 229940124307 fluoroquinolone Drugs 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 229940072172 tetracycline antibiotic Drugs 0.000 claims description 3
- DNXHEGUUPJUMQT-UHFFFAOYSA-N (+)-estrone Natural products OC1=CC=C2C3CCC(C)(C(CC4)=O)C4C3CCC2=C1 DNXHEGUUPJUMQT-UHFFFAOYSA-N 0.000 claims description 2
- VOXZDWNPVJITMN-ZBRFXRBCSA-N 17β-estradiol Chemical compound OC1=CC=C2[C@H]3CC[C@](C)([C@H](CC4)O)[C@@H]4[C@@H]3CCC2=C1 VOXZDWNPVJITMN-ZBRFXRBCSA-N 0.000 claims description 2
- LINPIYWFGCPVIE-UHFFFAOYSA-N 2,4,6-trichlorophenol Chemical compound OC1=C(Cl)C=C(Cl)C=C1Cl LINPIYWFGCPVIE-UHFFFAOYSA-N 0.000 claims description 2
- DNXHEGUUPJUMQT-CBZIJGRNSA-N Estrone Chemical compound OC1=CC=C2[C@H]3CC[C@](C)(C(CC4)=O)[C@@H]4[C@@H]3CCC2=C1 DNXHEGUUPJUMQT-CBZIJGRNSA-N 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 claims description 2
- 229960005309 estradiol Drugs 0.000 claims description 2
- 229930182833 estradiol Natural products 0.000 claims description 2
- 229960003399 estrone Drugs 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 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
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- BFBPISPWJZMWJN-UHFFFAOYSA-N methyl 2-[(7-hydroxy-3,7-dimethyloctylidene)amino]benzoate Chemical compound COC(=O)C1=CC=CC=C1N=CCC(C)CCCC(C)(C)O BFBPISPWJZMWJN-UHFFFAOYSA-N 0.000 claims description 2
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 claims description 2
- 229960000907 methylthioninium chloride Drugs 0.000 claims description 2
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 claims description 2
- 229960000282 metronidazole Drugs 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 claims description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 2
- 229940043267 rhodamine b Drugs 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- HFZWRUODUSTPEG-UHFFFAOYSA-N 2,4-dichlorophenol Chemical compound OC1=CC=C(Cl)C=C1Cl HFZWRUODUSTPEG-UHFFFAOYSA-N 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 239000007800 oxidant agent Substances 0.000 abstract description 7
- 230000001590 oxidative effect Effects 0.000 abstract description 7
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 28
- 238000006731 degradation reaction Methods 0.000 description 28
- GSDSWSVVBLHKDQ-JTQLQIEISA-N Levofloxacin Chemical compound C([C@@H](N1C2=C(C(C(C(O)=O)=C1)=O)C=C1F)C)OC2=C1N1CCN(C)CC1 GSDSWSVVBLHKDQ-JTQLQIEISA-N 0.000 description 26
- 229960003376 levofloxacin Drugs 0.000 description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
- 229960003887 dichlorophen Drugs 0.000 description 5
- 239000004098 Tetracycline Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- -1 iron ions Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229960005404 sulfamethoxazole Drugs 0.000 description 3
- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 description 3
- 229960002180 tetracycline Drugs 0.000 description 3
- 229930101283 tetracycline Natural products 0.000 description 3
- 235000019364 tetracycline Nutrition 0.000 description 3
- 150000003522 tetracyclines Chemical class 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 2
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229940011871 estrogen Drugs 0.000 description 1
- 239000000262 estrogen Substances 0.000 description 1
- 239000000413 hydrolysate Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- FLTRNWIFKITPIO-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe] FLTRNWIFKITPIO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
Classifications
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physical Water Treatments (AREA)
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Abstract
A method for synchronously removing organic pollutants and suspended matters in water belongs to the technical field of water environment pollutant removal, and particularly relates to a method for synchronously removing organic pollutants and suspended matters in water. The invention aims to solve the problems that the removal rate of organic pollutants degraded by using ultraviolet light alone is not high, the propagation of ultraviolet light can be hindered by suspended matters in a water body, the treatment cost is increased by using an oxidant, and the residual oxidant can cause secondary pollution to the water body. The method comprises the following steps: firstly, adding a ferric salt, and adjusting the pH value; and secondly, irradiating and stirring by ultraviolet light to obtain the water with organic pollutants and suspended matters removed. The invention is suitable for removing organic pollutants and suspended matters in water.
Description
Technical Field
The invention belongs to the technical field of water environment pollutant removal, and particularly relates to a method for synchronously removing organic pollutants and suspended matters in water.
Background
In recent years, with the rapid development of industry, a large amount of production wastewater is discharged into an aqueous environment, resulting in a gradual increase in the types and concentrations of residual organic pollutants in the aqueous environment. The residual pollutants in the water environment comprise various antibiotics, environmental estrogens, medicines and other residual compounds, the half-life period of the pollutants in the water environment is long, and the pollutants are difficult to degrade biologically and have the potential hazards of carcinogenesis, teratogenesis and mutagenesis. Therefore, the establishment of a method capable of efficiently removing various residual organic pollutants in the water body is receiving wide attention of society.
Ultraviolet light disinfection is commonly used in advanced treatment of feed water treatment plants and sewage treatment plants, and can realize degradation of organic matters and inactivation of microorganisms. But the ultraviolet light degradation alone is not effective in removing organic pollutants, and the suspension of the water body can block the transmission of the ultraviolet light. Various oxidants (hydrogen peroxide, chlorine, persulfate and the like) are added into an ultraviolet system, and oxidation active substances are generated through ultraviolet activation, so that the degradation of pollutants is accelerated, but the additional oxidant not only can increase the treatment cost, but also the residual oxidant can cause secondary pollution to the water body.
Disclosure of Invention
The invention aims to solve the problems that the removal rate of organic pollutants degraded by using ultraviolet light is low, the propagation of ultraviolet light can be hindered by suspended matters in a water body, the treatment cost is increased by using an oxidant, and the residual oxidant can cause secondary pollution to the water body, and provides a method for synchronously removing the organic pollutants and the suspended matters in water.
A method for synchronously removing organic pollutants and suspended matters in water is completed according to the following steps:
firstly, adding a trivalent ferric salt into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 2.0-8.0 to obtain sewage with the pH value of 2.0-8.0;
and secondly, reacting the sewage with the pH value of 2.0-8.0 under the conditions of ultraviolet irradiation and stirring, and removing organic pollutants and suspended matters in the sewage to obtain water from which the organic pollutants and the suspended matters are removed.
The principle and the advantages of the invention are as follows:
the principle of degrading residual organic pollutants and removing suspended matters is as follows:
direct degradation of pollutants by ultraviolet light:
Organic pollutants+UV→intermediates→CO2+H2O (1)
Fe3+and (3) producing hydroxyl radicals to degrade pollutants in cooperation with ultraviolet light:
Fe3++H2O→Fe(OH)2++H+ (2)
Fe(OH)2++UV→Fe2++·OH (3)
Fe2++O2→Fe3++O2 ·— (4)
·OH+Organic pollutants→intermediates→CO2+H2O (5)
Fe3+the ferric hydroxide generated by hydrolysis promotes the reduction of flocculation and precipitation of suspended matters in the water body:
Fe3++3H2O→Fe(OH)3↓+3H+ (6)
fe in the invention3+By the synergistic effect with UV, hydroxyl free radicals OH with strong oxidizing property can be rapidly generated, and the rapid degradation of residual organic matters is realized; fe3+The hydrolysate ferric hydroxide can efficiently promote the flocculation and precipitation of suspended particles in the water body and remove suspended matters in the water body; the turbidity of the water body is reduced, so that the penetration capacity of ultraviolet rays in the water body is improved, and the oxidation effect of the ultraviolet rays is enhanced. The result shows that in the system, various residual organic pollutants in the water body, including tetracycline antibiotics, fluoroquinolone antibiotics, sulfonamide antibiotics, bisphenol A and 2, 4-dichlorophen, can be removed rapidly through oxidation, and the suspended matters in the water body can be effectively removed. The inventionThe method has the advantages of simple process, convenient operation, low cost, high efficiency and no secondary pollution, can provide theoretical support for the advanced treatment of water, and has higher practical value in practical application;
secondly, within 5 minutes of degradation time, the degradation rate of the organic pollutants can reach 97 percent;
the removal rate of the organic pollutants in the invention is 90-100%, and the removal rates of the suspended matters are respectively 80-90%.
The invention is suitable for removing organic pollutants and suspended matters in water.
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit of the invention.
Drawings
FIG. 1 shows levofloxacin in UV/Fe3+System, UV system and Fe3+Degradation pattern in the system, wherein "□" is the degradation curve of levofloxacin in the UV system in comparative example 1, and ". smallcircle" is the degradation curve of levofloxacin in Fe system in comparative example 23+Degradation profile in the system, ". DELTA" is UV/Fe for levofloxacin in example 13+Degradation profile in the system;
FIG. 2 shows different Fe3+At a concentration of UV/Fe3+The system is used for removing the suspended matters;
FIG. 3 shows the difference in Fe3+At a concentration of UV/Fe3+The degradation effect of the system on levofloxacin is shown in the figure, wherein '□' represents Fe3+The concentration was 0mmol/L, ". smallcircle" represents Fe3+The concentration was 0.1mmol/L, ". DELTA" represents Fe3+The concentration was 0.25mmol/L, "four" stands for Fe3+The concentration was 0.5 mmol/L.
Detailed Description
The first embodiment is as follows: the method for synchronously removing the organic pollutants and suspended matters in the water is completed according to the following steps:
firstly, adding a trivalent ferric salt into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 2.0-8.0 to obtain sewage with the pH value of 2.0-8.0;
and secondly, reacting the sewage with the pH value of 2.0-8.0 under the conditions of ultraviolet irradiation and stirring, and removing organic pollutants and suspended matters in the sewage to obtain water from which the organic pollutants and the suspended matters are removed.
The second embodiment is as follows: the present embodiment differs from the present embodiment in that: the ferric salt in the step one is ferric nitrate, ferric sulfate or ferric chloride. Other steps are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters in the first step is 5-50 mu mol/L, and the organic pollutants are one or a mixture of more of tetracycline antibiotics, fluoroquinolone antibiotics, sulfonamide antibiotics, bisphenol A, bisphenol AF, metronidazole, phenol, 2, 4-dichlorophen, 2,4, 6-trichlorophenol, phthalate, estrone, estradiol, rhodamine B, methylene blue and aurantium II. The other steps are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: the concentration of the ferric salt in the sewage with the pH value of 2.0-8.0 in the step one is 0.1-1.0 mmol/L. The other steps are the same as those in the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: in the first step, the pH value of the sewage is adjusted to 2.0-8.0 by using sodium hydroxide with the concentration of 1.0mol/L and sulfuric acid solution with the concentration of 0.1 mol/L. The other steps are the same as those in the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is as follows: the ultraviolet light source in the second step is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm. The other steps are the same as those in the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is: the stirring speed in the second step is 20 r/min-30 r/min. The other steps are the same as those in the first to sixth embodiments.
The specific implementation mode is eight: the difference between this embodiment and one of the first to seventh embodiments is: the reaction time in the step two is 5 min-10 min. The other steps are the same as those in the first to seventh embodiments.
The specific implementation method nine: the difference between this embodiment and the first to eighth embodiments is: in the second step, the removal rate of the organic pollutants is 90-100%, and the removal rates of the suspended matters are respectively 80-90%. The other steps are the same as those in the first to eighth embodiments.
The detailed implementation mode is ten: the difference between this embodiment and one of the first to ninth embodiments is as follows: filtering 1mL of water with organic pollutants and suspended matters removed by using a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; measuring by adopting a high performance liquid chromatography, measuring the concentration of the target organic pollutants by using a standard curve, and calculating the removal rate of the organic pollutants under different reaction time and reaction conditions according to the concentration change before and after the reaction; standing and precipitating the sample to be detected for 2 hours at room temperature, taking supernatant liquid, performing suspended matter concentration analysis by using a turbidity meter, and calculating the removal rate of suspended matters under different reaction time and reaction conditions according to turbidity changes before and after reaction. The other steps are the same as those in the first to ninth embodiments.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Removal experiments for levofloxacin:
example 1: levofloxacin in UV/Fe3+The degradation in the system is completed according to the following steps:
firstly, adding ferric nitrate into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 3 by using 1mol/L sodium hydroxide and 0.1mol/L sulfuric acid solution to obtain the sewage with the pH value of 3;
the concentration of ferric nitrate in the sewage with the pH value of 3 in the step one is 0.1 mmol/L;
the concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters in the step one is 5 mu mol/L, and the organic pollutants are levofloxacin;
secondly, reacting the sewage with the pH value of 3 under the conditions of ultraviolet irradiation and the stirring speed of 20r/min, sampling at time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes respectively, filtering 1mL of water for removing organic pollutants and suspended matters by using a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; measuring by high performance liquid chromatography, measuring the concentration of the target organic pollutants by a standard curve, and calculating the removal rate of the organic pollutants under different reaction time and reaction conditions by the concentration change before and after the reaction, wherein the figure is shown in figure 1;
the ultraviolet light source in the second step is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm.
Comparative example 1: the degradation of levofloxacin in the UV system is completed according to the following steps:
reacting sewage containing organic pollutants and suspended matters under the conditions of ultraviolet irradiation and stirring speed of 20r/min, sampling at time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes respectively, filtering 1mL of water for removing the organic pollutants and the suspended matters by using a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; measuring by high performance liquid chromatography, measuring the concentration of the target organic pollutants by a standard curve, and calculating the removal rate of the organic pollutants under different reaction time and reaction conditions by the concentration change before and after the reaction, wherein the figure is shown in figure 1;
the ultraviolet light source is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm.
The concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters is 5 mu mol/L, and the organic pollutants are levofloxacin.
Comparative example 2: levofloxacin in Fe3+The degradation in the system is completed according to the following steps:
firstly, adding ferric nitrate into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 3 by using 1mol/L sodium hydroxide and 0.1mol/L sulfuric acid solution to obtain the sewage with the pH value of 3;
the concentration of ferric nitrate in the sewage with the pH value of 3 in the step one is 0.1 mmol/L;
the concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters in the step one is 5 mu mol/L, and the organic pollutants are levofloxacin;
reacting the sewage with the pH value of 3 at the stirring speed of 20r/min, sampling at time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes respectively, filtering 1mL of water for removing organic pollutants and suspended matters by using a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; the high performance liquid chromatography is adopted for determination, the concentration of the target organic pollutants is determined through a standard curve, and the removal rate of the organic pollutants under different reaction time and reaction conditions is calculated through the concentration change before and after the reaction, which is shown in figure 1.
FIG. 1 shows levofloxacin in UV/Fe3+System, UV system and Fe3+Degradation pattern in the system, wherein "□" is the degradation curve of levofloxacin in the UV system in comparative example 1, and ". smallcircle" is the degradation curve of levofloxacin in Fe system in comparative example 23+Degradation profile in the system, ". DELTA" is UV/Fe for levofloxacin in example 13+Degradation profile in the system;
as can be seen from FIG. 1, UV/Fe in example 13+In the system, the levofloxacin realizes 94 percent of degradation within 5 minutes, and the first-order reaction kinetic constant is 0.54min-1. While the UV system of comparative example 1 and Fe of comparative example 23+The degradation rate of the system on levofloxacin is 10% and 2% respectively.
At different Fe3+At a concentration of UV/Fe3+Removal experiment of system for suspended matter:
firstly, respectively adding ferric nitrate into 4 parts of sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 3 by using 1mol/L sodium hydroxide and 0.1mol/L sulfuric acid solution to respectively obtain the sewage with the pH value of 3 and the concentrations of 0mmol/L, 0.1mmol/L, 0.25mmol/L and 0.5 mmol/L;
the concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters in the step one is 5 mu mol/L, and the organic pollutants are levofloxacin;
secondly, respectively carrying out reaction on sewage with the pH value of 3 and the concentrations of 0mmol/L, 0.1mmol/L, 0.25mmol/L and 0.5mmol/L under the conditions of ultraviolet irradiation and the stirring speed of 20r/min, respectively sampling at the time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes, filtering 1mL of water for removing organic pollutants and suspended matters by adopting a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; standing and precipitating the sample to be detected for 2 hours at room temperature, taking supernatant liquid, performing suspended matter concentration analysis by using a turbidity meter, and calculating the removal rate of suspended matters under different reaction time and reaction conditions according to turbidity changes before and after reaction. As shown in FIG. 2;
the ultraviolet light source in the second step is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm.
FIG. 2 shows different Fe3+At a concentration of UV/Fe3+The system is used for removing the suspended matters;
as can be seen from FIG. 2, the turbidity of the water sample without adding iron ions is basically unchanged before and after the reaction, while the turbidity of the sewage is reduced from 5.28NTU to 2.42 NTU, 1.62 NTU and 1.03NTU after adding the iron ion solution, wherein the iron ion concentration is 0.1mmol/L, 0.25mmol/L and 0.5 mmol/L.
At different Fe3+At a concentration of UV/Fe3+Degradation removal experiment of the system for levofloxacin:
firstly, respectively adding ferric nitrate into 4 parts of sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 3 by using 1mol/L sodium hydroxide and 0.1mol/L sulfuric acid solution to respectively obtain the sewage with the pH value of 3 and the concentrations of 0mmol/L, 0.1mmol/L, 0.25mmol/L and 0.5 mmol/L;
the concentration of the organic pollutants in the sewage containing the organic pollutants and suspended matters in the step one is 5 mu mol/L, and the organic pollutants are levofloxacin;
secondly, respectively carrying out reaction on sewage with the pH value of 3 and the concentrations of 0mmol/L, 0.1mmol/L, 0.25mmol/L and 0.5mmol/L under the conditions of ultraviolet irradiation and the stirring speed of 20r/min, respectively sampling at the time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes, filtering 1mL of water for removing organic pollutants and suspended matters by adopting a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; measuring by adopting a high performance liquid chromatography, measuring the concentration of the target organic pollutants by using a standard curve, and calculating the removal rate of the organic pollutants under different reaction time and reaction conditions according to the concentration change before and after the reaction; as shown in FIG. 3;
the ultraviolet light source in the second step is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm.
FIG. 3 shows the difference in Fe3+At a concentration of UV/Fe3+The degradation effect of the system on levofloxacin is shown in the figure, wherein '□' represents Fe3+The concentration was 0mmol/L, ". smallcircle" represents Fe3+The concentration was 0.1mmol/L, ". DELTA" represents Fe3+The concentration was 0.25mmol/L, "four" stands for Fe3+The concentration was 0.5 mmol/L.
As can be seen from FIG. 3, with Fe3+The concentration of (a) gradually increased, and the degradation rate of levofloxacin increased to 97% within 5 minutes.
Example 2: tetracycline, levofloxacin, sulfamethoxazole, bisphenol A and 2, 4-dichlorophen in UV/Fe3+The degradation in the system is completed according to the following steps:
firstly, adding ferric nitrate into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 3 by using 1mol/L sodium hydroxide and 0.1mol/L sulfuric acid solution to obtain the sewage with the pH value of 3;
the concentration of ferric nitrate in the sewage with the pH value of 3 in the step one is 0.1 mmol/L;
the concentrations of tetracycline, levofloxacin, sulfamethoxazole, bisphenol A and 2, 4-dichlorophen in the sewage containing organic pollutants and suspended matters in the step one are all 5 mu mol/L;
secondly, reacting the sewage with the pH value of 3 under the conditions of ultraviolet irradiation and the stirring speed of 20r/min, sampling at time points of 0, 0.5, 1, 2, 3, 4 and 5 minutes respectively, filtering 1mL of water for removing organic pollutants and suspended matters by using a filter head with the aperture of 0.22 mu m, and adding 20 mu L of sodium thiosulfate with the concentration of 1mol/L to terminate the reaction to obtain a sample to be detected; measuring by adopting a high performance liquid chromatography, measuring the concentration of the target organic pollutants by using a standard curve, and calculating the removal rate of the organic pollutants at different reaction times according to the concentration change before and after the reaction;
the ultraviolet light source in the second step is a 30W low-pressure mercury lamp, and the ultraviolet wavelength is 254 nm.
The results show that the degradation rates of tetracycline, levofloxacin, sulfamethoxazole, bisphenol A and 2, 4-dichlorophen in 5 minutes are all as high as 90%.
Claims (10)
1. A method for synchronously removing organic pollutants and suspended matters in water is characterized in that the method for synchronously removing the organic pollutants and the suspended matters in the water is completed according to the following steps:
firstly, adding a trivalent ferric salt into sewage containing organic pollutants and suspended matters, and then adjusting the pH value of the sewage to 2.0-8.0 to obtain sewage with the pH value of 2.0-8.0;
and secondly, reacting the sewage with the pH value of 2.0-8.0 under the conditions of ultraviolet irradiation and stirring, and removing organic pollutants and suspended matters in the sewage to obtain water from which the organic pollutants and the suspended matters are removed.
2. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the ferric salt in the first step is ferric nitrate, ferric sulfate or ferric chloride.
3. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the concentration of the organic pollutants in the wastewater containing the organic pollutants and suspended matters in the step one is 5 to 50 μmol/L, and the organic pollutants are one or a mixture of several of tetracycline antibiotics, fluoroquinolone antibiotics, sulfonamide antibiotics, bisphenol A, bisphenol AF, metronidazole, phenol, 2, 4-dichlorophenol, 2,4, 6-trichlorophenol, phthalate, estrone, estradiol, rhodamine B, methylene blue and aurantium II.
4. The method for synchronously removing organic pollutants and suspended matters in water according to claim 1, wherein the concentration of the trivalent ferric salt in the sewage with the pH value of 2.0-8.0 in the step one is 0.1-1.0 mmol/L.
5. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the pH value of the sewage is adjusted to 2.0-8.0 in the step one by using sodium hydroxide with the concentration of 1.0mol/L and sulfuric acid solution with the concentration of 0.1 mol/L.
6. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the ultraviolet light emitting source in the second step is a 30W low-pressure mercury lamp and the ultraviolet wavelength is 254 nm.
7. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the stirring speed in the second step is 20r/min to 30 r/min.
8. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the reaction time in the second step is 5min to 10 min.
9. The method for synchronously removing organic pollutants and suspended matters in water as claimed in claim 1, wherein the removal rate of the organic pollutants in the step two is 90-100%, and the removal rate of the suspended matters is 80-90%.
10. The method for synchronously removing the organic pollutants and the suspended matters in the water according to claim 1, wherein in the second step, 1mL of water for removing the organic pollutants and the suspended matters is filtered by a filter head with the pore diameter of 0.22 μm, and then 20 μ L of sodium thiosulfate with the concentration of 1mol/L is added to terminate the reaction, so as to obtain a sample to be detected; measuring by adopting a high performance liquid chromatography, measuring the concentration of the target organic pollutants by using a standard curve, and calculating the removal rate of the organic pollutants under different reaction time and reaction conditions according to the concentration change before and after the reaction; standing and precipitating the sample to be detected for 2 hours at room temperature, taking supernatant liquid, performing suspended matter concentration analysis by using a turbidity meter, and calculating the removal rate of suspended matters under different reaction time and reaction conditions according to turbidity changes before and after reaction.
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