CN109607908A - A kind of processing method of chromate waste water - Google Patents
A kind of processing method of chromate waste water Download PDFInfo
- Publication number
- CN109607908A CN109607908A CN201811349150.8A CN201811349150A CN109607908A CN 109607908 A CN109607908 A CN 109607908A CN 201811349150 A CN201811349150 A CN 201811349150A CN 109607908 A CN109607908 A CN 109607908A
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- China
- Prior art keywords
- waste water
- chromate waste
- method described
- chromate
- concentration
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to a kind of processing methods of chromate waste water, comprising the following steps: chromate waste water is stirred filtering and removing slag, obtains primary chromate waste water；The primary chromate waste water is evaporated concentration, obtains secondary chromate waste water；It is put into adsorbent material into secondary chromate waste water, hydrochloric acid is added and adjusts pH value of waste water, and stir a period of time；PAM flocculant, reaction a period of time is added to waste water；After reaction, precipitating filtering, obtains the water of chromium content qualification.Adsorbent material of the present invention uses zeolite, and more inexpensively, processing cost is low, high treating effect, has good economic benefit and environmental benefit.
Description
Technical field
The present invention relates to environment protection field, specially a kind of processing method of chromate waste water.
Background technique
Chromium has that silvery white metallic luster, ductility is good, hardness is big, fusing point is high, the characteristics such as corrosion-resistant, is commonly used to fill
Decorations property coating, corrosion-proof wear-resistant material.Therefore, chromium and compound has extremely wide application in the industrial production.It is useless containing chromium
Water is mainly from industries such as plating, process hides, chromic salts industry, metallurgical industry, intermetallic composite coating, paint, printing and dyeing.It is many due to relating to chromium industry
It is more, while these industry distribution points are more and wide, inevitably bring a large amount of waste water, cause serious environmental problem.
In heavy metal pollution type, pollution of chromium comes the 2nd, is only second to lead.
That there are valence states is related with it for the toxicity of chromium, and trivalent chromium is the essential trace elements of the human body, to maintaining human normal
Physiological function plays an important role, the synthesis for participating in glycometabolism process, promoting lipid-metabolism and protein, and the growth of human body is sent out
It educates and plays facilitation；Cr VI has stronger oxidation, has very high solubility and migration in water body, can
It is enriched in vivo.Cr VI toxicity is very big, is 100 times of trivalent chromium, a small amount of contact can cause uncomfortable schneiderian membrane, ulcer or
Perforation of nasal septum, long-term, high-dose contacts the damage that will cause kidney, liver, or even induces cancer.
Surface Processing Industry Cr VI yield, discharge amount are maximum, account for respectively national total yield, total release 79%
With 59%.For a long time, chromate waste water processing is exactly a more intractable environmental problem, is a weight in Industrial Wastewater Treatment
The research field wanted.
Summary of the invention
The shortcomings that for the above-mentioned prior art, the present invention provide a kind of processing method of chromate waste water.
The present invention solves above-mentioned technical problem using following technical scheme: a kind of processing method of chromate waste water, including with
Lower step:
(1) chromate waste water is stirred filtering and removing slag, obtains primary chromate waste water；
(2) the primary chromate waste water is evaporated concentration, obtains secondary chromate waste water；
(3) it is put into adsorbent material into secondary chromate waste water, when adding hydrochloric acid and adjust pH value of waste water, and stirring one section
Between；
(4) PAM flocculant, reaction a period of time is added in waste water in step (3)；
(5) after reaction, precipitating filtering, obtains the water of chromium content qualification.
Preferably, mixing speed is 50~100r/min in step (1), it is filtered into filters pressing.
Preferably, evaporation and concentration described in step (2) to chromium content is 20~30mg/L.
Preferably, adsorbent material described in step (3) is 13X zeolite, the concentration of the hydrochloric acid is 0.01~
0.05mol/L。
Preferably, mixing time is 120min~240min in step (3).
Preferably, stirring is magnetic agitation in step (3).
As further preferred, pH value is 5~6 in step (3).
Preferably, the concentration of PAM flocculant is 1~3 ‰ in step (4), the reaction time is 60min~120min.
Preferably, the sedimentation time is 60min~80min in step (5).
Preferably, filtering is using suction filtration in step (5).
The invention has the following advantages over the prior art: the present invention is using in porosity adsorbent material absorption waste water
Chromium has many advantages, such as that easy to operate, selectivity is high, degree of purification is high so that waste water be made to be purified；Zeolite be pore structure very
Flourishing adsorbent material, uniform pore diameter, there is sieve performance in aperture, therefore is not only physical absorption to the absorption of chromium ion, and
There is ion exchange.Zeolite has cellular structure, and brilliant intracorporal bug hole and duct are communicated with each other, and pore size is equal
Even, this special crystal structure not only makes zeolite have very big dispersion force, but also there are also biggish electrostatic force, to chromium ion
Adsorption effect it is more preferable.Porosity adsorbent material uses zeolite, and more inexpensively, processing cost is low, has good economic benefit
And environmental benefit.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1:
Chromate waste water is first stirred, mixing speed 50r/min, slagging-off is then filtered using filters pressing, is obtained
Primary chromate waste water；The primary chromate waste water is evaporated concentration, is concentrated by evaporation to the secondary that chromium content is 20mg/L and contains
Chromium waste water；Adsorbent material 13X zeolite is put into secondary chromate waste water, adding concentration is that 0.01mol/L hydrochloric acid adjusts waste water
PH value uses magnetic agitation to 5, stirs 120min；Then the PAM flocculant that concentration is 1 ‰, reaction is added to middle waste water again
60min.After reaction, 60min is first precipitated, is then filtered by the way of filtering again, obtains the water of chromium content qualification.
Embodiment 2:
Chromate waste water is first stirred, mixing speed 80r/min, slagging-off is then filtered using filters pressing, is obtained
Primary chromate waste water；The primary chromate waste water is evaporated concentration, is concentrated by evaporation to the secondary that chromium content is 25mg/L and contains
Chromium waste water；Adsorbent material 13X zeolite is put into secondary chromate waste water, adding concentration is that 0.03mol/L hydrochloric acid adjusts waste water
PH value uses magnetic agitation to 5.5, stirs 200min；Then the PAM flocculant that concentration is 2 ‰ is added to middle waste water again, instead
Answer 100min.After reaction, 70min is first precipitated, is then filtered by the way of filtering again, chromium content qualification is obtained
Water.
Embodiment 3:
Chromate waste water is first stirred, mixing speed 100r/min, slagging-off is then filtered using filters pressing, is obtained
Primary chromate waste water；The primary chromate waste water is evaporated concentration, is concentrated by evaporation to the secondary that chromium content is 30mg/L and contains
Chromium waste water；Adsorbent material 13X zeolite is put into secondary chromate waste water, adding concentration is that 0.05mol/L hydrochloric acid adjusts waste water
PH value uses magnetic agitation to 6, stirs 240min；Then the PAM flocculant that concentration is 3 ‰, reaction is added to middle waste water again
120min.After reaction, 80min is first precipitated, is then filtered by the way of filtering again, chromium content qualification is obtained
Water.
Embodiment 4:
Chromate waste water is first stirred, mixing speed 90r/min, slagging-off is then filtered using filters pressing, is obtained
Primary chromate waste water；The primary chromate waste water is evaporated concentration, is concentrated by evaporation to the secondary that chromium content is 30mg/L and contains
Chromium waste water；Adsorbent material 13X zeolite is put into secondary chromate waste water, adding concentration is that 0.04mol/L hydrochloric acid adjusts waste water
PH value uses magnetic agitation to 5, stirs 210min；Then the PAM flocculant that concentration is 2 ‰, reaction is added to middle waste water again
110min.After reaction, 70min is first precipitated, is then filtered by the way of filtering again, chromium content qualification is obtained
Water.
Embodiment 5:
Chromate waste water is first stirred, mixing speed 60r/min, slagging-off is then filtered using filters pressing, is obtained
Primary chromate waste water；The primary chromate waste water is evaporated concentration, is concentrated by evaporation to the secondary that chromium content is 20mg/L and contains
Chromium waste water；Adsorbent material 13X zeolite is put into secondary chromate waste water, adding concentration is that 0.02mol/L hydrochloric acid adjusts waste water
PH value uses magnetic agitation to 6, stirs 190min；Then the PAM flocculant that concentration is 2 ‰, reaction is added to middle waste water again
70min.After reaction, 60min is first precipitated, is then filtered by the way of filtering again, obtains the water of chromium content qualification.
Basic principles and main features and advantages of the present invention of the invention, the technology of the industry has been shown and described above
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of processing method of chromate waste water, comprising the following steps:
(1) chromate waste water is stirred filtering and removing slag, obtains primary chromate waste water；
(2) the primary chromate waste water is evaporated concentration, obtains secondary chromate waste water；
(3) it is put into adsorbent material into secondary chromate waste water, adds hydrochloric acid and adjust pH value of waste water, and stirs a period of time；
(4) PAM flocculant, reaction a period of time is added in waste water in step (3)；
(5) after reaction, precipitating filtering, obtains the water of chromium content qualification.
2. being filtered into filters pressing according to the method described in claim 1, mixing speed is 50~100r/min in step (1).
3. according to the method described in claim 1, evaporation and concentration described in step (2) to chromium content is 20~30mg/L.
4. the concentration of the hydrochloric acid is according to the method described in claim 1, adsorbent material described in step (3) is 13X zeolite
0.01~0.05mol/L.
5. according to the method described in claim 4, mixing time is 120min~240min in step (3).
6. according to the method described in claim 5, stirring is magnetic agitation in step (3).
7. according to the method described in claim 1, pH value is 5~6 in step (3).
8. the reaction time is according to the method described in claim 1, the concentration of PAM flocculant is 1~3 ‰ in step (4)
60min~120min.
9. according to the method described in claim 1, the sedimentation time is 60min~80min in step (5).
10. according to the method described in claim 1, filtering is using suction filtration in step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811349150.8A CN109607908A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of chromate waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811349150.8A CN109607908A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of chromate waste water |
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| CN109607908A true CN109607908A (en) | 2019-04-12 |
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| CN201811349150.8A Withdrawn CN109607908A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of chromate waste water |
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Citations (11)
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|---|---|---|---|---|
| CN1267641A (en) * | 1999-03-15 | 2000-09-27 | 中国地质大学（北京） | Technology of applying 13x zeolite in treating heavy metal-containing waste water and recovering metal |
| CN101269871A (en) * | 2008-04-23 | 2008-09-24 | 南京大学 | Method for processing chrome wastewater |
| CN101343125A (en) * | 2008-08-26 | 2009-01-14 | 昆山工研院华科生物高分子材料研究所有限公司 | Heavy metal waste water treatment process and apparatus |
| CN102259998A (en) * | 2011-07-28 | 2011-11-30 | 江苏南方涂装环保股份有限公司 | Treatment method for wastewater containing heavy metals |
| WO2012176618A1 (en) * | 2011-06-20 | 2012-12-27 | 富士フイルム株式会社 | Water purification method |
| CN103771631A (en) * | 2014-02-24 | 2014-05-07 | 杭州双博环保科技有限公司 | Process for treating and recycling alkaline wastewater containing zinc and chromium ions |
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-
2018
- 2018-11-13 CN CN201811349150.8A patent/CN109607908A/en not_active Withdrawn
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|---|---|---|---|---|
| CN1267641A (en) * | 1999-03-15 | 2000-09-27 | 中国地质大学（北京） | Technology of applying 13x zeolite in treating heavy metal-containing waste water and recovering metal |
| CN101269871A (en) * | 2008-04-23 | 2008-09-24 | 南京大学 | Method for processing chrome wastewater |
| CN101343125A (en) * | 2008-08-26 | 2009-01-14 | 昆山工研院华科生物高分子材料研究所有限公司 | Heavy metal waste water treatment process and apparatus |
| WO2012176618A1 (en) * | 2011-06-20 | 2012-12-27 | 富士フイルム株式会社 | Water purification method |
| CN102259998A (en) * | 2011-07-28 | 2011-11-30 | 江苏南方涂装环保股份有限公司 | Treatment method for wastewater containing heavy metals |
| CN103771631A (en) * | 2014-02-24 | 2014-05-07 | 杭州双博环保科技有限公司 | Process for treating and recycling alkaline wastewater containing zinc and chromium ions |
| CN105236639A (en) * | 2015-10-30 | 2016-01-13 | 太仓东能环保设备有限公司 | Chromium-containing wastewater treatment process |
| US20180134590A1 (en) * | 2016-11-14 | 2018-05-17 | Water Remediation Technology Llc | Systems and methods for removing chromium from aqueous media |
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Application publication date: 20190412 |
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