CN104773874A - Method for treating wastewater containing thiocyanogen compound - Google Patents
Method for treating wastewater containing thiocyanogen compound Download PDFInfo
- Publication number
- CN104773874A CN104773874A CN201510162265.6A CN201510162265A CN104773874A CN 104773874 A CN104773874 A CN 104773874A CN 201510162265 A CN201510162265 A CN 201510162265A CN 104773874 A CN104773874 A CN 104773874A
- Authority
- CN
- China
- Prior art keywords
- add
- waste water
- bearing
- ferrate
- sulfur
- 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.)
- Pending
Links
Abstract
The invention discloses a method for treating wastewater containing a thiocyanogen compound. The method comprises the following steps: (1) adjusting the pH value of thiocyanogen compound-containing wastewater of which the content of the thiocyanogen compound is less than or equal to 10mg/L to be 7.5-13.0, then adding polyaluminium chloride and cationic-type polyacrylamide until the final concentrations are 0.1-1.5% and 0.01-0.12% respectively, standing for precipitation, and taking the supernatant; (2) adjusting the pH value of the supernatant obtained in the step (1) to be 8.0-12.0; (3) adding ferrates (including sodium ferrate and potassium ferrate) into the supernatant treated in the step (2), and stirring at a rate of 200-600rpm for reaction for 25-40 minutes at room temperature, wherein the quantity of the added ferrates ensures that the mole ratio of Fe<6+> to SCN- in the material is 1:(2-12); and (4) adding polyaluminium chloride and polyacrylamide into the material obtained after the reaction in the step (3) until the final concentrations are 0.5-2.0% and 0.01-0.12%, standing for precipitation, and filtering to obtain treated water. By adopting the method disclosed by the invention, the problem that common oxidants such as hydrogen peroxide and hypochlorite are poor in effect of removing the thiocyanogen compound is solved.
Description
Technical field
The invention belongs to technical field of waste water processing, be specifically related to a kind of method processing sulfur-bearing cyanogen compound waste water.
Background technology
Prussiate (especially the prussiate of free state) is a class highly toxic substance, and the gas or the solution that touch prussiate all can cause poisoning; In a large amount of discharge cyanide wastewater to environment, meeting grievous injury environment, causes environmental pollution; The deterioration of environment in water body can be caused in discharge cyanide wastewater to water body and affect growth etc. biological in water body.Thiocyanation compound belongs to the special prussiate of a class, also can think the derivative of prussiate, and thiocyanation compound is more stable than other forms of prussiate, this just mean it more difficult oxidized dose be oxidized.Thiocyanation compound is also that tool is virose, especially dangerous in acid condition.
At present for the treatment process mainly chemical oxidization method of cyanide wastewater, conventional oxygenant has clorox, dioxide peroxide, ozone, Losantin, hydrogen peroxide etc., and sodium hypochlorite oxidization is method the most frequently used both at home and abroad.But sodium hypochlorite oxidization chemical depletion is high, processing cost is large, can not be completely oxidized to some metal complex.Thiocyanation compound is the highly stable prussiate of a class, general oxygenant as hydrogen peroxide etc. to the removal effect of thiocyanation compound very, add the consumption of other materials in waste water, cause in treating processes, consume a large amount of chemical agents, add very large processing cost; Moreover the oxygenants such as clorox, ozone, hydrogen peroxide inherently can bring pollution to environment; There is a large amount of chlorions in clorox processed waste water, in waste water, disinfection byproduct (DBP) rolls up; The ozone of high density produces harm to human body, and execute-in-place is dangerous large; Hydrogen peroxide is explosive material.
Summary of the invention
The object of the invention is to overcome prior art defect, a kind of method processing sulfur-bearing cyanogen compound waste water is provided.
Concrete technical scheme of the present invention is as follows:
Process a method for sulfur-bearing cyanogen compound waste water, comprise the steps:
(1) pH to 7.5 ~ 13.0 of the sulfur-bearing cyanogen compound waste water of thiocyanation compound Han Liang≤10mg/L are regulated, add polymerize aluminum chloride again and cationic-type polyacrylamide to final concentration is respectively 1.0 ~ 15.0 ‰ and 0.1 ~ 1.2 ‰, after staticly settling, get supernatant liquor;
(2) pH to 8.0 ~ 12.0 of regulating step (1) gained supernatant liquor;
(3) in the supernatant liquor after step (2) process, add ferrate, and under room temperature 200 ~ 600rpm stirring reaction, 25 ~ 40min, add ferrate amount make Fe in material
6+and SCN
-mol ratio be 1:2 ~ 12;
(4) after step (3) reaction, add polymerize aluminum chloride in gained material and polyacrylamide to final concentration is respectively 5.0 ~ 20.0 ‰ and 0.1 ~ 1.2 ‰, staticly settle, after filtration, namely obtain water after process.
In a preferred embodiment of the invention, described step (1) is: pH to 7.8 ~ 10.0 regulating sulfur-bearing cyanogen compound waste water, add polymerize aluminum chloride again and cationic-type polyacrylamide to final concentration is respectively 1.0 ~ 10.0 ‰ and 0.1 ~ 1.0 ‰, after staticly settling, get supernatant liquor.
In a preferred embodiment of the invention, described step (2) is: pH to 8.0 ~ 11.0 of regulating step (1) gained supernatant liquor.
In a preferred embodiment of the invention, described step (3) is: in the supernatant liquor after step (2) process, add ferrate, and under room temperature 200 ~ 600rpm stirring reaction, 25 ~ 40min, add ferrate amount make Fe in material
6+and SCN
-mol ratio be 1:4.4 ~ 8.6.
In a preferred embodiment of the invention, described step (4) is: after step (3) reaction, add polymerize aluminum chloride in gained material and polyacrylamide to final concentration is respectively 5.0 ~ 15.0 ‰ and 0.1 ~ 1.0 ‰, staticly settle, after filtration, namely obtain the rear water of process.
In a preferred embodiment of the invention, described ferrate is Na2Fe04 and/or potassium ferrate.
The invention has the beneficial effects as follows:
1, the ferrate that method of the present invention adopts has very strong oxidisability, can thiocyanation compound in the efficient oxidation waste water;
2, the ferrate that adopts of method of the present invention is in oxidising process, is reduced into hydrous iron oxide (FeOOH) and ferric ion (comprises Fe
3+with Fe (OH)
3), product has absorption, degrades and helps solidifying effect, and can not bring secondary pollution to water body.
3, method of the present invention solves the problem of conventional oxygenant as the removal such as hydrogen peroxide, hypochlorite thiocyanation compound poor effect.
4, method of the present invention has simple to operate, and not needing increases large equipment, the feature that running cost is low, processing efficiency is high.
Embodiment
Below by way of embodiment, technical scheme of the present invention is further detailed and is described.
Embodiment 1:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 9.50, and the thiocyanation compound concentration after pre-treatment (1.0gPAC+0.1gPAM) is 3.75mg/L; Regulate pH 8.40; Add 15.0mL Na2Fe04 solution (Fe
6+concentration be 0.5mmoml/L) (Fe
6+and SCN
-mol ratio be 1:8.6), and react 30min under the magnetic agitation condition of 200rpm; Add 10.0g polymerize aluminum chloride (PAC) and 1.0g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 1.33mg/L.
Embodiment 2:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 9.55, and the thiocyanation compound concentration after pre-treatment (5.0gPAC+0.6gPAM) is 4.65mg/L; Regulate pH 8.30; Add 20.0mL ferrate (Na2Fe04 and potassium ferrate mixed solution) solution (Fe
6+concentration be 0.5mmoml/L) (Fe
6+and SCN
-mol ratio be 1:8.0), and react 25min under the magnetic agitation condition of 400rpm; Add 15.0g polymerize aluminum chloride (PAC) and 1.2g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 1.50mg/L.
Embodiment 3:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 9.50, and the thiocyanation compound concentration after pre-treatment (10.0gPAC+1.0gPAM) is 5.30mg/L; Regulate pH 8.25; Add 7.0mL Na2Fe04 solution (Fe
6+concentration be 2.0mmoml/L) (Fe
6+and SCN
-mol ratio be 1:6.5), and react 30min under the magnetic agitation condition of 600rpm; Add 5.0g polymerize aluminum chloride (PAC) and 0.1g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 0.38mg/L.
Embodiment 4:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 9.55, and the thiocyanation compound concentration after pre-treatment (6.0gPAC+0.8gPAM) is 6.18mg/L; Regulate pH 8.00; Add 6.0mL potassium ferrate solution (Fe
6+concentration be 2.5mmoml/L) (Fe
6+and SCN
-mol ratio be 1:7.1), and react 40min under the magnetic agitation condition of 500rpm; Add 8.5g polymerize aluminum chloride (PAC) and 0.8g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 0.23mg/L.
Embodiment 5:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 11.00, and the thiocyanation compound concentration after pre-treatment (sulfuric acid+3.0gPAC+0.2gPAM) is 5.70mg/L; Regulate pH 8.10; Add 5.0mL potassium ferrate solution (Fe
6+concentration be 3.0mmoml/L) (Fe
6+and SCN
-mol ratio be 1:6.6), and react 35min under the magnetic agitation condition of 350rpm; Add 6.0g polymerize aluminum chloride (PAC) and 0.3g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 0.08mg/L.
Embodiment 6:
Take from certain petro-chemical corporation's sulfur-bearing cyanogen compound waste water, volume of water sample is 1000mL, and former water pH value is 11.00, and the thiocyanation compound concentration after pre-treatment (sulfuric acid+5.0gPAC+0.3gPAM) is 7.70mg/L; Regulate pH 8.50; Add 10.0mL ferrate (mixed solution of Na2Fe04 and potassium ferrate) solution (Fe
6+concentration be 3.0mmoml/L) (Fe
6+and SCN
-mol ratio be 1:4.4), and react 30min under the magnetic agitation condition of 500rpm; Add 12.0g polymerize aluminum chloride (PAC) and 1.0g polyacrylamide (PAM) again in reaction soln, to leave standstill after filtering to obtain final outflow water, detect in final outflow water the content of thiocyanation compound be 0.40mg/L.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process according to this, the equivalence change namely done according to the scope of the claims of the present invention and description with modify, all should still belong in scope that the present invention contains.
Claims (6)
1. process a method for sulfur-bearing cyanogen compound waste water, it is characterized in that: comprise the steps:
(1) pH to 7.5 ~ 13.0 of the sulfur-bearing cyanogen compound waste water of thiocyanation compound Han Liang≤10mg/L are regulated, add polymerize aluminum chloride again and cationic-type polyacrylamide to final concentration is respectively 1.0 ~ 15.0 ‰ and 0.1 ~ 1.2 ‰, after staticly settling, get supernatant liquor;
(2) pH to 8.0 ~ 12.0 of regulating step (1) gained supernatant liquor;
(3) in the supernatant liquor after step (2) process, add ferrate, and under room temperature 200 ~ 600rpm stirring reaction, 25 ~ 40min, add ferrate amount make Fe in material
6+and SCN
-mol ratio be 1:2 ~ 12;
(4) after step (3) reaction, add polymerize aluminum chloride in gained material and polyacrylamide to final concentration is respectively 5.0 ~ 20.0 ‰ and 0.1 ~ 1.2 ‰, staticly settle, after filtration, namely obtain water after process.
2. a kind of method processing sulfur-bearing cyanogen compound waste water as claimed in claim 1, it is characterized in that: described step (1) is: pH to 7.8 ~ 10.0 regulating sulfur-bearing cyanogen compound waste water, add polymerize aluminum chloride again and cationic-type polyacrylamide to final concentration is respectively 1.0 ~ 10.0 ‰ and 0.1 ~ 1.0 ‰, after staticly settling, get supernatant liquor.
3. a kind of method processing sulfur-bearing cyanogen compound waste water as claimed in claim 1, is characterized in that: described step (2) is: pH to 8.0 ~ 11.0 of regulating step (1) gained supernatant liquor.
4. a kind of method processing sulfur-bearing cyanogen compound waste water as claimed in claim 1, it is characterized in that: described step (3) is: in the supernatant liquor after step (2) process, add ferrate, and under room temperature 200 ~ 600rpm stirring reaction, 25 ~ 40min, add ferrate amount make Fe in material
6+and SCN
-mol ratio be 1:4.4 ~ 8.6.
5. a kind of method processing sulfur-bearing cyanogen compound waste water as claimed in claim 1, it is characterized in that: described step (4) is: after step (3) reaction, add polymerize aluminum chloride in gained material and polyacrylamide to final concentration is respectively 5.0 ~ 15.0 ‰ and 0.1 ~ 1.0 ‰, staticly settle, after filtration, namely obtain the rear water of process.
6. a kind of method processing sulfur-bearing cyanogen compound waste water as described in claim arbitrary in claim 1 to 5, is characterized in that: described ferrate is Na2Fe04 and/or potassium ferrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162265.6A CN104773874A (en) | 2015-04-08 | 2015-04-08 | Method for treating wastewater containing thiocyanogen compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162265.6A CN104773874A (en) | 2015-04-08 | 2015-04-08 | Method for treating wastewater containing thiocyanogen compound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104773874A true CN104773874A (en) | 2015-07-15 |
Family
ID=53615692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510162265.6A Pending CN104773874A (en) | 2015-04-08 | 2015-04-08 | Method for treating wastewater containing thiocyanogen compound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104773874A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264242A (en) * | 2018-03-01 | 2018-07-10 | 复旦大学 | Nanostructured cuprous oxide photoelectricity conversion thin film and its preparation method and application |
| CN114477512A (en) * | 2021-11-26 | 2022-05-13 | 云南大地丰源环保有限公司 | Wastewater treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU432765A1 (en) * | 1971-12-09 | 1977-06-25 | Сибирский Металлургический Институт Им. С.Орджоникидзе | Method of disposal of cyanide = and radon-containing wastewater |
| JPS54156341A (en) * | 1978-05-31 | 1979-12-10 | Ebara Corp | Treatment of waste water |
| JP2007260586A (en) * | 2006-03-29 | 2007-10-11 | Jfe Steel Kk | Treatment method of waste water generated in coke oven |
| CN103833123A (en) * | 2014-02-21 | 2014-06-04 | 陈瀚翔 | Method for treating complexed chemical nickel electroplating wastewater |
-
2015
- 2015-04-08 CN CN201510162265.6A patent/CN104773874A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU432765A1 (en) * | 1971-12-09 | 1977-06-25 | Сибирский Металлургический Институт Им. С.Орджоникидзе | Method of disposal of cyanide = and radon-containing wastewater |
| JPS54156341A (en) * | 1978-05-31 | 1979-12-10 | Ebara Corp | Treatment of waste water |
| JP2007260586A (en) * | 2006-03-29 | 2007-10-11 | Jfe Steel Kk | Treatment method of waste water generated in coke oven |
| CN103833123A (en) * | 2014-02-21 | 2014-06-04 | 陈瀚翔 | Method for treating complexed chemical nickel electroplating wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 安徽省供销商业学校: "《棉花检验学》", 31 December 1976 * |
| 杨瑞琴: "《微量物证检验》", 30 June 2014 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264242A (en) * | 2018-03-01 | 2018-07-10 | 复旦大学 | Nanostructured cuprous oxide photoelectricity conversion thin film and its preparation method and application |
| CN108264242B (en) * | 2018-03-01 | 2021-06-22 | 复旦大学 | Nano-structure cuprous oxide photoelectric conversion film and preparation method and application thereof |
| CN114477512A (en) * | 2021-11-26 | 2022-05-13 | 云南大地丰源环保有限公司 | Wastewater treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101533649B1 (en) | Wastewater treatment method using micro-electrolysis reaction and its micro-electrolysis matter | |
| CN109987750B (en) | Method for promoting Fenton oxidation mediated by calcium and organic acid complex | |
| CN104030505B (en) | A kind of nonferrous metal mine flotation waste water treatment process | |
| WO2014194664A1 (en) | Method for treating wastewater containing cyanides, thiocyanides and heavy metals | |
| WO2012033077A1 (en) | Method of treating copper etching waste liquor | |
| EP2808074A1 (en) | Hydrogen chloride removal process contact with ferrous compounds | |
| CN104445718A (en) | Method for treating gold mine cyanidation waste residue leaching solution | |
| JP2017148728A (en) | Wastewater treatment method, wastewater treatment apparatus and coal gasification power generation facility comprising same | |
| CN106219805A (en) | A kind of process technique of chemical nickel waste liquid | |
| Hu et al. | Effective treatment of cadmium–cyanide complex by a reagent with combined function of oxidation and coagulation | |
| JP5945682B2 (en) | Treatment method of wastewater containing cyanide | |
| CN107721040A (en) | A kind of garbage percolation liquid treating system and its method | |
| CN109437386B (en) | Method for removing metal thallium in wastewater | |
| CN104773874A (en) | Method for treating wastewater containing thiocyanogen compound | |
| CN110981013A (en) | Method for treating waste liquid after extraction of thiamine | |
| CN104787933B (en) | Treatment method for gold-smelting cyanide-containing wastewater | |
| CN104230059A (en) | Method for ozone oxidation comprehensive treatment of cyanide-containing waste water | |
| CN104071939B (en) | Nonferrous metal mine method of wastewater treatment | |
| CN103964634B (en) | The process for treating industrial waste water of high nitrite, high-carbon hydrochlorate and high COD concentration | |
| RU2550189C1 (en) | Method for deactivating cyano-containing solutions and pulps | |
| CN115594346A (en) | Method for treating debugging wastewater in nuclear power construction phase | |
| KR20200059276A (en) | Methods for the treatment of wastewater | |
| CN104860455A (en) | Methylene dithiocyanate wastewater treatment method | |
| JP2018202270A (en) | Agent and treatment method of selenium-containing wastewater | |
| JP5334148B2 (en) | Wastewater treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |