CN110697866A - Method for removing odor in water by activating calcium peroxide with ferrous iron - Google Patents
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- 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
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Abstract
The invention discloses a method for removing odor in water by activating calcium peroxide with ferrous, which comprises preparing calcium peroxide into solution, adding ferrous sulfate, and preparing 0.1mol/l Na2S2O3The obtained product is used as an oxidant quencher for standby; preparing three identical odor-containing water samples containing dimethyl isoborneol, geosmin, beta-cyclocitral and dimethyl trisulfide, and respectively adding the solutions prepared in the step (1) into the three water samples to ensure that the concentration of calcium peroxide in each water sample is respectively 2.0, 1.0 and 1.0mmol/L, and the concentration of ferrous ions is respectively 0.5, 0.5 and 0.1 mmol/L; sampling 10mml at regular intervals, and sending the water sample to a GCMS system to detect the concentration of the smelly substances in the water sample. According to the invention, the ferrous ions catalyze the calcium peroxide to generate hydroxyl radicals, so that smelly substances in water are efficiently and cleanly removed, the energy consumption is low, the cleaning and environment-friendly effects are realized, and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of flower spreading devices, in particular to a method for removing odor in water by activating calcium peroxide with ferrous iron.
Background
Along with the increasingly developed society of China, people have higher requirements on the quality sense of drinking water, and the peculiar smell is listed in the sanitary Standard for Drinking Water (GB5749-2006) as a conventional index. However, in recent years, the frequent outbreak of the event that the drinking water contains the odor substance causes serious trouble to the domestic water of people. The main source of the odorous substances in the water body is organic substances with bad odor generated by algae or certain bacteria such as actinomycetes and the like. These organics are all semi-volatile and have a very low olfactive threshold, typically on the order of nanograms. At present, the common odor substances in the water body of the water source comprise olferol, dimethyl isoborneol, dimethyl trisulfide and the like. The first two smelly substances are most typical and common and are taken as water quality reference indexes to be included in the sanitary standard of drinking water, and the limit values are both 10 ng/l. In recent years, frequent algae outbreaks in various regions cause the content of the foreign odor substances in the drinking water source water to exceed the standard, thereby causing serious water treatment burden to water treatment plants. Therefore, the effective removal of the odor substances has important significance for the water quality guarantee of domestic drinking water in China and is a difficult problem to be solved urgently in a water treatment plant. The water treatment process of a water supply plant can generally remove the odorant to near or below the olfactory threshold. However, when a large amount of odor substances exist in the water source body, the odor substances are difficult to remove to reach the standard by the treatment process of the water plant. The common technologies for removing odor substances in water at present include activated carbon adsorption, oxidant oxidation, biological treatment and the like. Among the oxidizing agents commonly used in the oxidation process are chlorine, chlorine dioxide, and the like. However, the oxychlorination method can cause carcinogenic byproducts such as trihalomethane and the like to be generated in the drinking water, and the residue of the oxychlorination agent can also cause peculiar smell in the water. Therefore, finding a cleaner and more effective oxidant without byproducts is of great significance for removing odor in water.
Disclosure of Invention
The invention aims to provide a method for removing odor in water by activating calcium peroxide with ferrous iron, which efficiently and cleanly removes odor substances in water by catalyzing calcium peroxide with ferrous ions to generate hydroxyl free radicals and has the characteristics of low energy consumption, cleanness, environmental protection, high efficiency and the like.
In order to achieve the aim, the invention provides a method for removing odor in water by using ferrous activated calcium peroxide, which comprises the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate;
(2) preparing an oxidant quencher: na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing three identical odor-containing water samples containing dimethyl isoborneol (2-MIB), Geosmin (GSM), beta-cyclocitral (beta-cyc) and dimethyl trithioether (DMTS), adding the solution prepared in the step (1) into the three water samples respectively to ensure that the concentration of calcium peroxide in each water sample is respectively 2.0mmol/L, 1.0mmol/L and 1.0mmol/L, and the concentration of ferrous ions is respectively 0.5mmol/L, 0.5mmol/L and 0.1mmol/L, and finally carrying out shake reaction on the whole reaction system at 25 ℃ for 2 hours;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (1) at regular intervals for 10mml, putting the water samples into a headspace bottle added with 100ul of a quenching agent, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
Preferably, the mass ratio of the calcium peroxide to the ferrous sulfate added in the step (1) is 2: 0.5.
Preferably, the concentration ratio of the 2-MIB to the beta-cyc in the step (3) is 20: 1.
Preferably, the method for removing the odor in the water by using the ferrous activated calcium peroxide comprises the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate;
(2) preparing an oxidant quencher: na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 3 parts of identical smelly water sample containing 200ng/L of 2-MIB, GSM, 10ug/L of beta-cyc and DMTS respectively, wherein each part is 500mL, then adding the solution prepared in the step (1) into the three parts of water sample respectively to ensure that the concentration of calcium peroxide in each part is 2.0mmol/L, 1.0mmol/L and 1.0mmol/L respectively, and the concentration of ferrous ions is 0.5mmol/L, 0.5mmol/L and 0.1mmol/L respectively, and finally carrying out shake reaction on the whole reaction system at 25 ℃ for 2 h;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (3) for 10mml at regular intervals, putting the water samples into a headspace bottle added with 100ul of quencher, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
Preferably, the method for removing the odor in the water by using the ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.1mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
Preferably, the method for removing the odor in the water by using the ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
Preferably, the method for removing the odor in the water by using the ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 2.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) for 10mml at regular intervals, sampling at 0, 30, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quencher, and sending the three water samples to a GCMS (gas chromatography tandem mass spectrometry) instrument to measure the concentration of the smelly substances in the water samples.
Therefore, the method for removing odor in water by activating calcium peroxide with ferrous iron with the structure is adopted, and hydroxyl free radicals are generated by catalyzing calcium peroxide with ferrous ions, so that odor substances in water are efficiently and cleanly removed, and the method has the characteristics of low energy consumption, cleanness, environmental protection, high efficiency and the like.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a graph showing the degradation curve of odorants at a calcium peroxide concentration of 1.0mol/l and a ferrous ion concentration of 0.1mol/l in example 1 of a method for removing odor from water by activating calcium peroxide with ferrous iron;
FIG. 2 is a graph showing the degradation curve of odorants at a calcium peroxide concentration of 1.0mol/l and a ferrous ion concentration of 0.5mol/l in example 2 of a method for removing odor from water by activating calcium peroxide with ferrous iron;
FIG. 3 is a graph showing the degradation curve of the odorant at a calcium peroxide concentration of 2.0mol/l and a ferrous ion concentration of 0.5mol/l in example 3, which is a method for removing odor from water by activating calcium peroxide with ferrous iron.
Detailed Description
The invention provides a method for removing odor in water by activating calcium peroxide with ferrous iron, which comprises the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate, wherein the mass ratio of the calcium peroxide to the ferrous sulfate is 2: 0.5;
(2) preparing an oxidant quencher: na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing three identical odor-containing water samples containing dimethyl isoborneol (2-MIB), Geosmin (GSM), beta-cyclocitral (beta-cyc) and dimethyl trithioether (DMTS), wherein the concentration ratio of the 2-MIB to the beta-cyc is 20: 1, then respectively adding the solution prepared in the step (1) into the three water samples to ensure that the concentration of calcium peroxide in each water sample is respectively 2.0mmol/L, 1.0mmol/L and 1.0mmol/L, and the concentration of ferrous ions is respectively 0.5mmol/L, 0.5mmol/L and 0.1mmol/L, and finally carrying out shaking reaction on the whole reaction system at 25 ℃ for 2 hours;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (1) at regular intervals for 10mml, putting the water samples into a headspace bottle added with 100ul of a quenching agent, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
Further, a method for removing odor in water by using ferrous activated calcium peroxide, which comprises the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate;
(2) preparing an oxidant quencher: na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 3 parts of identical smelly water sample containing 200ng/L of 2-MTB, GSM and 10ug/L of beta-cyc and DMTS respectively, wherein each part is 500mL, then adding the solution prepared in the step (1) into the three parts of water sample respectively to ensure that the concentration of calcium peroxide in each part is 2.0mmol/L, 1.0mmol/L and 1.0mmol/L respectively, and the concentration of ferrous ions in each part is 0.5mmol/L, 0.5mmol/L and 0.1mmol/L respectively, and finally shaking the whole reaction system at 25 ℃ for 2 hours;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (3) for 10mml at regular intervals, putting the water samples into a headspace bottle added with 100ul of quencher, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
Example 1
A method for removing odor in water by using ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.1mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
As shown in FIG. 1, it was found that the degradation removal rates of Geosmin (GSM), beta-cyclocitral (beta-cyc) and dimethyl trisulfide (DMTS) after 2h reaction were 10.7%, 16.7% and 97.6%, respectively. The dimethyl isoborneol (2-MIB) basically has no removal effect, and the degradation rate of DMTS can reach more than 96% after the reaction is carried out for 10 min.
Example 2
A method for removing odor in water by using ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
As shown in FIG. 2, the results show that the degradation removal rates of dimethylisoborneol (2-MIB), Geosmin (GSM), beta-cyclocitral (beta-cyc) and Dimethyltrisulfide (DMTS) after 2 hours of reaction can respectively reach 9.9%, 19.3%, 23.8% and 99.9%, and the effect on DMTS degradation is very good.
Example 3
A method for removing odor in water by using ferrous activated calcium peroxide comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) na is prepared in 0.1mol/I2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/I of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 2.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) for 10mml at regular intervals, sampling at 0, 30, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quencher, and sending the three water samples to a GCMS (gas chromatography tandem mass spectrometry) instrument to measure the concentration of the smelly substances in the water samples.
As shown in FIG. 3, it was found that the degradation removal rates of dimethylisoborneol (2-MIB), Geosmin (GSM), beta-cyclocitral (beta-cyc), and Dimethyltrisulfide (DMTS) after 2 hours of reaction were 26.8%, 37.0%, and 98.8%, respectively. It is found that increasing the dosage of calcium peroxide and ferrous ions can increase the degradation rate of dimethyl isoborneol and oxytetracycline, but the removal effect of beta-cyclocitral and dimethyl trisulfide is not obviously improved, wherein the dimethyl trisulfide is nearly completely degraded.
The reaction mechanism is as follows: the oxidant generates a series of high-energy state oxidation free radicals such as hydroxyl free radicals and the like under the activation of a catalyst or illumination and other conditions, thereby efficiently and rapidly degrading pollutants such as calcium peroxide (CaO)2) Is a nontoxic oxidant with good stability, can be slowly decomposed in humid air and water, and can continuously and slowly release H2O2. In the ferrous ion (Fe)2+) In the presence of the catalyst, hydroxyl free radicals in a high energy state can be generated, so that odor substances in water can be effectively removed, the degradation is thorough, and toxic and harmful byproducts can not be generated.
Therefore, the method for removing odor in water by activating calcium peroxide with ferrous iron with the structure is adopted, and hydroxyl free radicals are generated by catalyzing calcium peroxide with ferrous ions, so that odor substances in water are efficiently and cleanly removed, and the method has the characteristics of low energy consumption, cleanness, environmental protection, high efficiency and the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (7)
1. A method for removing odor in water by activating calcium peroxide with ferrous iron is characterized by comprising the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate;
(2) preparing an oxidant quencher: preparing 0.1mol/l of Na2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing three identical odor-containing water samples containing dimethyl isoborneol (2-MIB), Geosmin (GSM), beta-cyclocitral (beta-cyc) and dimethyl trithioether (DMTS), adding the solution prepared in the step (1) into the three water samples respectively to ensure that the concentration of calcium peroxide in each water sample is respectively 2.0mmol/L, 1.0mmol/L and 1.0mmol/L, and the concentration of ferrous ions is respectively 0.5mmol/L, 0.5mmol/L and 0.1mmol/L, and finally carrying out shake reaction on the whole reaction system at 25 ℃ for 2 hours;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (1) at regular intervals for 10mml, putting the water samples into a headspace bottle added with 100ul of a quenching agent, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
2. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, wherein: the mass ratio of the calcium peroxide to the ferrous sulfate added in the step (1) is 2: 0.5.
3. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, wherein: the concentration ratio of the 2-MIB to the beta-cyc in the step (3) is 20: 1.
4. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, which comprises the following steps:
(1) preparing a solution: preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the ferrous sulfate;
(2) preparing an oxidant quencher: preparing 0.1mol/l of Na2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 3 parts of identical smelly water sample containing 200ng/L of 2-MIB, GSM, 10ug/L of beta-cyc and DMTS respectively, wherein each part is 500mL, then adding the solution prepared in the step (1) into the three parts of water sample respectively to ensure that the concentration of calcium peroxide in each part is 2.0mmol/L, 1.0mmol/L and 1.0mmol/L respectively, and the concentration of ferrous ions is 0.5mmol/L, 0.5mmol/L and 0.1mmol/L respectively, and finally carrying out shake reaction on the whole reaction system at 25 ℃ for 2 h;
(4) sampling and submitting for inspection: sampling the three water samples obtained in the step (3) for 10mml at regular intervals, putting the water samples into a headspace bottle added with 100ul of quencher, sending the water samples to a GCMS system to detect the concentration of the smelly substances in the water samples, and analyzing the detection result.
5. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, which comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) preparing 0.1mol/lNa2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/L of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.1mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
6. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, which comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) preparing 0.1mol/l of Na2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/L of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 1.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) at regular intervals for 10mml, sampling at 0, 10, 20, 40, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quenching agent, and sending the headspace bottle to a GCMS instrument to measure the concentration of the smelly substances in the water samples.
7. The method for removing odor in water by using ferrous activated calcium peroxide as claimed in claim 1, which comprises the following steps:
(1) preparing calcium peroxide into a solution, adding ferrous sulfate, and controlling the concentration of the calcium peroxide and the ferrous sulfate;
(2) preparing 0.1mol/l of Na2S2O3The obtained product is used as an oxidant quencher for standby;
(3) preparing 500mL of the same smelly water sample containing 200ng/L of 2-MIB, GSM, beta-cyc and DMTS, adding the mixed solution prepared in the step (1) to ensure that the concentration of each part of calcium peroxide is 2.0mmol/L and the concentration of ferrous ions is 0.5mmol/L, and oscillating the whole reaction system at 25 ℃ for 2 hours;
(4) sampling the three water samples obtained in the step (3) for 10mml at regular intervals, sampling at 0, 30, 60, 90 and 120min, putting the three water samples into a headspace bottle added with 100ul of quencher, and sending the three water samples to a GCMS (gas chromatography tandem mass spectrometry) instrument to measure the concentration of the smelly substances in the water samples.
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| CN105000655A (en) * | 2015-08-05 | 2015-10-28 | 同济大学 | Method for removing algae in water through oxidizing agent activated through ferrous iron |
| CN105036290A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Method for degrading smelly substance in water through oxidizing agent activated by ferrous iron |
| CN106955706A (en) * | 2017-03-31 | 2017-07-18 | 常州大学 | A kind of NZVI/CaO2The method of phthalic acid ester in Synergistic degradation underground water |
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| CN102701345B (en) * | 2012-05-21 | 2013-12-11 | 中国科学院生态环境研究中心 | Preoxidation-coagulation algae removing method based on in-situ generation of double coagulants |
| CN109354143B (en) * | 2018-11-16 | 2022-02-18 | 同济大学 | Method for treating high algae content water based on calcium peroxide reinforced coagulation |
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| US20020003116A1 (en) * | 2000-07-07 | 2002-01-10 | Golden Josh H. | System and method for removal of arsenic from aqueous solutions |
| CN105000655A (en) * | 2015-08-05 | 2015-10-28 | 同济大学 | Method for removing algae in water through oxidizing agent activated through ferrous iron |
| CN105036290A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Method for degrading smelly substance in water through oxidizing agent activated by ferrous iron |
| CN106955706A (en) * | 2017-03-31 | 2017-07-18 | 常州大学 | A kind of NZVI/CaO2The method of phthalic acid ester in Synergistic degradation underground water |
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