CN103922511B - The minimizing technology of trace selenium in a kind of water - Google Patents
The minimizing technology of trace selenium in a kind of water Download PDFInfo
- Publication number
- CN103922511B CN103922511B CN201410186368.1A CN201410186368A CN103922511B CN 103922511 B CN103922511 B CN 103922511B CN 201410186368 A CN201410186368 A CN 201410186368A CN 103922511 B CN103922511 B CN 103922511B
- Authority
- CN
- China
- Prior art keywords
- water
- selenium
- trace
- present
- ferrate
- 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
Abstract
The minimizing technology of trace selenium in a kind of water.The present invention relates to the minimizing technology of trace selenium in water.The present invention to solve trace selenium in existing water there is treatment technology complex process in minimizing technology, running cost is high, and the removal efficiency of selenium is low, and adopts engineering nano material to remove heavy metal in water, deposits difficult after a procedure recovery and the difficult problem be separated.Method: add ferrate to containing in the water of trace selenium, reaction, whip attachment, then dosing coagulant, finally successively through coagulation, precipitation, filtration, can remove trace selenium in water.The removal efficiency of the present invention to selenium reaches more than 90%, and technical matters is simple, running cost is low, achieves effective removal of selenium, and tap water reaches " drinking water sanitary standard ", and namely selenium is lower than 10 μ g/L.The present invention is used for the minimizing technology of trace selenium in a kind of water.
Description
Technical field
The present invention relates to the minimizing technology of trace selenium in water.
Background technology
Selenium is trace element important in ecotope, is also micro elements needed by human.The excessive meeting of Selenium in Environment causes animals and plants body to produce disease.In fact, for vertebrates, best selenium intake and the difference between the selenium intake of toxic effect can be caused very little.The selenium of high density then can direct the growing of damage to crops, and reduces output, cause animal embryo anamorphosis even dead.
Based on toxicity and the environmental safety of selenium, many countries have all formulated strict environmental standard to it in the world, also the maximum concentration of these harmful heavy metals in water is strictly limited, i.e. (selenium is 10 μ g/L) in China's " Drinking Water hygienic practice ".In recent years, the pollution of China's Heavy Metals in Water Environment selenium is day by day serious, and directly cause the healthy of people to be endangered, serious threat, to public health security, produces larger social influence.At present, in water body, the treatment technology of selenium mainly comprises biological process, the precipitator method, reverse osmosis, nanofiltration and absorption etc., but these methods or to be difficult in deep purifying water body the selenium of trace, or running cost is high, is difficult to effective popularization.Nano material also becomes the brand-new material of heavy metals removal in water gradually, has very high specific surface area, can remove the heavy metal in water, and the cost of engineering nano material in water treatment is very high, and deposits difficult after a procedure recovery and the difficult problem be separated.Therefore, emergency processing is carried out for the water source by heavy metal selenium contamination and seems particularly important, develop urgent technique efficient, cheap, easy to use extremely urgent.
Summary of the invention
The present invention be to solve trace selenium in existing water there is treatment technology complex process in minimizing technology, running cost is high, and the removal efficiency of selenium is low, and adopt the heavy metal in engineering nano material removal water, deposit difficult after a procedure recovery and the difficult problem be separated, and provide the minimizing technology of trace selenium in a kind of water.
A minimizing technology for trace selenium in water, specifically carries out according to following steps:
One, add ferrate to containing in the water of trace selenium, then under rotating speed is 260r/min ~ 350r/min, reaction 1min ~ 5min, obtains mixing solutions; The dosage of described ferrate is 0.5mg/L ~ 20mg/L;
Two, under rotating speed is 150r/min ~ 250r/min, the mixing solutions that step one obtains continues whip attachment 6min ~ 11min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 1mg/L ~ 40mg/L.
The present invention utilizes ferrate strong oxidizing property to be oxidized tetravalence selenium, generates the hexavalent selenium easily removed; Utilize ferrate to reduce simultaneously and generate the nano-iron oxide of ferric iron hydrolysis generation as sorbent material, this sorbent material has the advantages that specific surface area is large, be easy to precipitate and separate, the selenium of lower concentration in water can be removed by active adsorption, can ensure that the selenium of lower concentration in drinking water source reaches the restriction of regulation in country's " drinking water sanitary standard " when water factory's water outlet, i.e. 0.1 μ g/L.This technique has that removal efficiency is high, technique is simple, flexible and convenient operation, do not change the original treatment process of water factory and the advantage such as running cost is low, can be used for the emergency processing of water contamination accident.
The invention has the beneficial effects as follows: the removal efficiency of the present invention to selenium reaches more than 90%, and technical matters is simple, running cost is low; Achieve effective removal of selenium, tap water reaches " drinking water sanitary standard ", and namely selenium is lower than 10 μ g/L.
The present invention is used for the minimizing technology of trace selenium in a kind of water.
Accompanying drawing explanation
Fig. 1 is the removal effect figure of trace selenium in embodiment one water.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the minimizing technology of trace selenium in a kind of water described in present embodiment, specifically carry out according to following steps:
One, add ferrate to containing in the water of trace selenium, then under rotating speed is 260r/min ~ 350r/min, reaction 1min ~ 5min, obtains mixing solutions; The dosage of described ferrate is 0.5mg/L ~ 20mg/L;
Two, under rotating speed is 150r/min ~ 250r/min, the mixing solutions that step one obtains continues whip attachment 6min ~ 11min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 1mg/L ~ 40mg/L.
The ferrate added in present embodiment step one is potassium ferrate or Na2Fe04.Present embodiment, in the selection of ferrate, is as the criterion not introduce that limit in other tap water, harmful assorted element in source water.
The coagulation of conventional water treatment process, precipitation, filtration is utilized in present embodiment step 3.
Present embodiment utilizes ferrate strong oxidizing property to be oxidized tetravalence selenium, generates the hexavalent selenium easily removed; Utilize ferrate to reduce simultaneously and generate the nano-iron oxide of ferric iron hydrolysis generation as sorbent material, this sorbent material has the advantages that specific surface area is large, be easy to precipitate and separate, the selenium of lower concentration in water can be removed by active adsorption, can ensure that the selenium of lower concentration in drinking water source reaches the restriction of regulation in country's " drinking water sanitary standard " when water factory's water outlet, i.e. 10 μ g/L.This technique has that removal efficiency is high, technique is simple, flexible and convenient operation, do not change the original treatment process of water factory and the advantage such as running cost is low, can be used for the emergency processing of water contamination accident.
The invention has the beneficial effects as follows: the removal efficiency of the present invention to selenium reaches more than 95%, and technical matters is simple, running cost is low; Achieve effective removal of selenium, tap water reaches " drinking water sanitary standard ", and namely selenium is lower than 10 μ g/L.
The present invention is used for the minimizing technology of trace selenium in a kind of water.
Embodiment two: present embodiment and embodiment one unlike: the dosage of the ferrate described in step one is 1mg/L ~ 20mg/L.Other is identical with embodiment one.
Embodiment three: one of present embodiment and embodiment one or two unlike: the dosage of the ferrate described in step one is 15mg/L.Other is identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three unlike: the ferrate described in step one is potassium ferrate or Na2Fe04.Other is identical with embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four unlike: described in step one containing selenium in the water of trace selenium be the tetravalence selenium of dissociated ion state, dissociated ion state hexavalent selenium, by the tetravalence selenium of organism complexing, by the hexavalent selenium of organism complexing, by the tetravalence selenium of inorganics complexing or by a kind of or wherein several mixture in the hexavalent selenium of inorganics complexing.Other is identical with embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five unlike: in step one to containing trace selenium water in add ferrate, then under rotating speed is 300r/min, reaction 3min, obtain mixing solutions.Other is identical with embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six unlike: in step 2 under rotating speed is 200r/min, mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing.Other is identical with embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven are 5mg/L ~ 35mg/L unlike the dosage of the coagulating agent described in step 3.Other is identical with embodiment one to seven.
Following examples are adopted to verify beneficial effect of the present invention:
Embodiment one:
The minimizing technology of trace selenium in a kind of water described in the present embodiment, specifically carries out according to following steps:
One, add ferrate to containing in the selenous water of 100 μ g/L, then under rotating speed is 300r/min, reaction 3min, obtains mixing solutions; The dosage of described ferrate is 10mg/L; Described ferrate is potassium ferrate;
Two, under rotating speed is 200r/min, the mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 10mg/L; Described coagulating agent is Tai-Ace S 150.
The present embodiment removes the content remaining selenium in rear water by plasma mass spectrograph test, and by calculating the clearance of trace selenium in water outlet, in the present embodiment water, the removal effect figure of trace selenium as shown in Figure 1, and as seen from the figure, the removal efficiency of the present embodiment to selenium reaches more than 97%.
Embodiment two:
The minimizing technology of trace selenium in a kind of water described in the present embodiment, specifically carries out according to following steps:
One, add ferrate to containing in the selenic water of 100 μ g/L, then under rotating speed is 300r/min, reaction 3min, obtains mixing solutions; The dosage of described ferrate is 10mg/L; Described ferrate is potassium ferrate;
Two, under rotating speed is 200r/min, the mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 10mg/L; Described coagulating agent is Tai-Ace S 150.
The removal efficiency of the present embodiment to selenium reaches more than 96%.
Embodiment three:
The minimizing technology of trace selenium in a kind of water described in the present embodiment, specifically carries out according to following steps:
One, in the water containing 100 μ g/L tetravalence selenium and 5mg/L humic acids (in total organic carbon), add ferrate, then under rotating speed is 300r/min, reaction 3min, obtains mixing solutions; The dosage of described ferrate is 10mg/L; Described ferrate is potassium ferrate;
Two, under rotating speed is 200r/min, the mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 10mg/L; Described coagulating agent is Tai-Ace S 150.
The present embodiment aims to provide the impact of removing tetravalence selenium with humic acids organism representatively, and the removal efficiency of the present embodiment to selenium reaches more than 94%.
Embodiment four:
The minimizing technology of trace selenium in a kind of water described in the present embodiment, specifically carries out according to following steps:
One, in the water containing 100 μ g/L hexavalent seleniums and 5mg/L humic acids (in total organic carbon), add ferrate, then under rotating speed is 300r/min, reaction 3min, obtains mixing solutions; The dosage of described ferrate is 10mg/L; Described ferrate is potassium ferrate;
Two, under rotating speed is 200r/min, the mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 10mg/L; Described coagulating agent is Tai-Ace S 150.
The present embodiment aims to provide the impact of removing hexavalent selenium with humic acids organism representatively, and the removal efficiency of the present embodiment to selenium reaches more than 96%.
Claims (1)
1. the minimizing technology of trace selenium in water, is characterized in that the minimizing technology of trace selenium in a kind of water carries out according to following steps:
One, add ferrate to containing in micro-selenous water, then under rotating speed is 300r/min, reaction 3min, obtains mixing solutions; The dosage of described ferrate is 10mg/L; Described ferrate is potassium ferrate;
Two, under rotating speed is 200r/min, the mixing solutions that step one obtains continues whip attachment 10min, obtains the mixing solutions after adsorbing;
Three, to dosing coagulant in the mixing solutions after absorption, then successively through coagulation, precipitation, filtration, trace selenium in water can be removed; The dosage of described coagulating agent is 10mg/L; Described coagulating agent is Tai-Ace S 150.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186368.1A CN103922511B (en) | 2014-05-05 | 2014-05-05 | The minimizing technology of trace selenium in a kind of water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186368.1A CN103922511B (en) | 2014-05-05 | 2014-05-05 | The minimizing technology of trace selenium in a kind of water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103922511A CN103922511A (en) | 2014-07-16 |
| CN103922511B true CN103922511B (en) | 2015-08-19 |
Family
ID=51140945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410186368.1A Active CN103922511B (en) | 2014-05-05 | 2014-05-05 | The minimizing technology of trace selenium in a kind of water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103922511B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105000537B (en) * | 2015-06-29 | 2017-07-14 | 中南大学 | A kind of method for separating selenium in alkaline leaching liquid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279652A (en) * | 1997-10-20 | 2001-01-10 | 德士古发展公司 | Process for removing selenium from refinery process water and wastewater streams |
| WO2007080686A1 (en) * | 2006-01-12 | 2007-07-19 | University Of Tsukuba | Process for the disposal of selenium-containing wastewater |
| CN102807272A (en) * | 2012-09-01 | 2012-12-05 | 同济大学 | Method for removing Se(IV)/Se(VI) from water by magnetic field enhanced zero-valent iron |
| CN103153879A (en) * | 2010-07-27 | 2013-06-12 | 泽农科技合股公司 | Selenium removal using chemical oxidation and biological reduction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120241381A1 (en) * | 2011-03-21 | 2012-09-27 | Bruso Bruce L | Method and apparatus for removal of selenium from water |
-
2014
- 2014-05-05 CN CN201410186368.1A patent/CN103922511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279652A (en) * | 1997-10-20 | 2001-01-10 | 德士古发展公司 | Process for removing selenium from refinery process water and wastewater streams |
| WO2007080686A1 (en) * | 2006-01-12 | 2007-07-19 | University Of Tsukuba | Process for the disposal of selenium-containing wastewater |
| CN103153879A (en) * | 2010-07-27 | 2013-06-12 | 泽农科技合股公司 | Selenium removal using chemical oxidation and biological reduction |
| CN102807272A (en) * | 2012-09-01 | 2012-12-05 | 同济大学 | Method for removing Se(IV)/Se(VI) from water by magnetic field enhanced zero-valent iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103922511A (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103342410B (en) | Water treatment method for removing arsenic by strengthening zero-valent iron | |
| CN102145948A (en) | Water treatment method for adsorbing and removing Tl<+> and/or Cd2<+> by producing nanometer manganese dioxide in situ | |
| CN110563191B (en) | Method for removing organic micropollutants in drinking water by utilizing persulfate reinforced ferric salt coagulation process | |
| JP2013139016A (en) | Method for producing drinking water from contaminated water by utilizing electron donation and charge transfer force | |
| CN103102026A (en) | Sudden raw water thallium pollution emergency treatment system and method | |
| CN205501051U (en) | Landfill leachate degree of depth processing system based on ozone advanced oxidation | |
| CN103922458A (en) | Method for removing trace arsenic from water | |
| CN103691392A (en) | Preparation method of silicon material loaded with nanometer multi-metal | |
| CN103922511B (en) | The minimizing technology of trace selenium in a kind of water | |
| CN102951754A (en) | Method for removing PFOS (Perfluorooctane sulfonate)-based compound from drinking water | |
| CN104310508B (en) | A kind of waste water treating agent | |
| Chen et al. | Degradation of ofloxacin by potassium ferrate: kinetics and degradation pathways | |
| CN202046976U (en) | Heavy metal sewage treatment device | |
| CN112159025A (en) | Treatment method and application of hexavalent chromium-containing wastewater | |
| CN103922514A (en) | Method for removing trace thallium contained in water | |
| CN103922512A (en) | Method for removing trace antimony in water | |
| CN102344586A (en) | Preparation method of chitosan-carried copper and bamboo charcoal composite material, and method for removing micropollutants in drinking water by the chitosan-carried copper and bamboo charcoal composite material | |
| CN202717650U (en) | Water treatment device aiming at standard exceeding of iron and manganese and fluorine and arsenic in groundwater | |
| CN104193050A (en) | Method for deeply removing thallium in water body through impulse ultrasound and hydrodynamic cavitation coupled, synergetic and assisted oxidation | |
| CN203128326U (en) | Depth purification and filtration treater of tap water | |
| CN104003435B (en) | A kind of method reducing iron ion content in zinc sulphide | |
| CN203411415U (en) | Small-sized seawater desalinating device | |
| CN204039117U (en) | Polluted water ozone hydrogen peroxide throwing device | |
| CN102019169A (en) | Regeneration method of activated carbon in organosilicon wastewater treatment | |
| CN110835204A (en) | Method for degrading ammonia nitrogen in 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 |