CN107416960A - The minimizing technology of heavy metal ion in a kind of solution of ferrous chloride - Google Patents
The minimizing technology of heavy metal ion in a kind of solution of ferrous chloride Download PDFInfo
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- CN107416960A CN107416960A CN201710345789.8A CN201710345789A CN107416960A CN 107416960 A CN107416960 A CN 107416960A CN 201710345789 A CN201710345789 A CN 201710345789A CN 107416960 A CN107416960 A CN 107416960A
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- solution
- metal ion
- heavy metal
- ferrous chloride
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention relates to a kind of minimizing technology of heavy metal ion in solution of ferrous chloride.The present invention uses two step displacement methods, concretely comprises the following steps：1）A certain amount of iron powder is added into solution of ferrous chloride, a period of time is reacted under certain temperature and mechanical agitation, separation of solid and liquid is carried out to reaction solution, obtains filtrate；2）A certain amount of aluminium powder is added into filtrate, under certain temperature and mixing speed react a period of time, separation of solid and liquid cleaned after solution.The content for the heavy metal ion such as the chromium of afterchlorinate ferrous iron solution, lead, nickel, copper that clean is up to state standards, production and other commercial Applications available for water treatment agent.The present invention has novelty and practicality, and method is simple and easy, and cost is cheap, the efficient heavy-metal ion removal of energy, realizes recycling for resource, has wide prospects for commercial application.
Description
Technical field
The invention belongs to environmental protection and water treatment field, and in particular to heavy metal ion in a kind of solution of ferrous chloride
（Chromium, lead, nickel, copper etc.）Minimizing technology.
Background technology
Frerrous chloride is had a wide range of applications in industries such as water process, and solution of ferrous chloride is largely used to papermaking, printing and dyeing
Deng the processing of the processing of industrial wastewater, especially alkaline industrial waste water.Frerrous chloride can also be used as production water treatment agent chlorination
The raw material of iron and poly-ferric chloride etc..
Steel product is in deep-processing process, it is necessary to carry out acid pickling and rust removing processing to improve its surface texture.For common
Steel, hydrochloric acid significantly turn into the most frequently used mordant because of its pickling effect.A large amount of iron contents can be produced during chlorohydric acid pickling
For 60 ~ 120 g/L acid chlorization ferrous iron solution, wherein also containing the heavy metal such as a small amount of manganese ion and chromium, lead, nickel, copper from
Son.
Traditionally typically using lime neutralisation processing acid chlorization ferrous iron solution, improve pH value and make heavy metal ion with
Precipitation form separates out, but this method is difficult to up to standard, and caused sludge quantity is big, adds post-processing difficulty, wastes
Substantial amounts of acid and iron resource, thus be just phased out.Iron and steel pickling waste liquid is included in danger by national environmental protection portion at present
Dangerous chemicals.The synthetical recovery of solution of ferrous chloride turns into emphasis of concern in recent years, and conventional method roasts including high temperature
Burning, evaporative crystallization, electrolysis, film process, chemical transformation etc., target are to realize the recovery of hydrochloric acid and ferrous salt and recycle.
However, the exceeded effective utilization for limiting solution of ferrous chloride of content of beary metal, also brings to ecological environment and health
Huge threat.Heavy metal ion, which enters in water, can influence the growth of the aquatiles such as fish, hinder fish production；It is discharged into soil
In heavy metal can progressively be accumulated in plant, cause plant growth suppressed, there is also huge danger to people's generic key health
Evil.
The minimizing technology of heavy metal in waste water mainly has chemical precipitation method, electrolysis, ion-exchange, solvent extraction
Deng.Chemical precipitation is simple to operate, but limited for the removal ability of low-concentration heavy metal, and it is big sludge quantity to be present, and post processing is difficult
Spend the problem of big.Electrolysis energy consumption is big, and wastewater treatment capacity is small, and processing cost is high.Ion-exchange has effluent quality good and had
The advantages of effect recovery heavy metal resources, but low consistency conditions are only applicable to, easily influenceed by high concentration ferrous ion, and set
Fat regenerates and elution processes are cumbersome, easily causes secondary pollution.Solvent extraction can effectively enriching heavy metal ion, but used
Extractant is expensive, while the ferrous ion of high content also brings along severe jamming.
It is intermetallic potential difference and activity order that displacement method, which goes the principle of removing heavy metals, with the strong metal of activity
Ion corresponding to the weak metal of activity is cemented out from solution.Chinese patent application CN201610136568.5 is disclosed
A kind of method of micro heavy and nonmetallic inclusion in removing pickle liquor, using a certain amount of high-purity iron powder or/and zinc powder
Add in pickle liquor, under certain temperature and mixing speed, it is reacted certain time with pickle liquor, it is right after completion of the reaction
Suspension is settled or filtered.This method only carries out a step displacement, because iron powder/zinc powder is easily oxidized in heating condition, instead
Answer later stage removal efficiency of heavy metals to decline, have impact on the further removal of heavy metal ion.Chinese patent application
CN201611028473.8 discloses a kind of method for handling heavy metal cation waste water and synchronous recovery metal oxygen-containing acid group, adopts
With nano zero valence iron, heavy metal category ion has a very strong removal effect, but using nano zero valence iron rather than common iron powder,
It prepares complexity, and processing cost is higher.
The content of the invention
It is an object of the invention to provide a kind of removal side of heavy metal ion in easy, efficient solution of ferrous chloride
Method, meet the requirement that solution of ferrous chloride recycles.
In the present invention, the minimizing technology of heavy metal ion in a kind of solution of ferrous chloride, using two step removal method, specific step
It is rapid as follows：
（1）Take solution of ferrous chloride and iron powder to add in closed reactor, nitrogen is passed through into reactor, is carried out under mechanical agitation
Reaction, reaction carry out separation of solid and liquid to reaction solution after terminating, obtain filtrate；Wherein：The amount of iron powder is the g/L of 0.1 g/L ~ 30；
（2）To step（1）Aluminium powder is added in gained filtrate, nitrogen is passed through into reactor, is reacted under mechanical agitation, to institute
Obtain reaction solution and carry out separation of solid and liquid, the solution after being cleaned；The amount of aluminium powder is the g/L of 0.5 g/L ~ 20.
In the present invention, step（1）Described in reaction temperature be 30 ~ 80 DEG C, the reaction time be 2 ~ 8 h, and control machinery stirs
Rotating speed be 10 ~ 400 rpm.
In the present invention, step（2）Described in reaction temperature be 30 ~ 80 DEG C, the reaction time be 2 ~ 8 h, and control machinery stirs
Rotating speed be 10 ~ 400 rpm.
In the present invention, step（2）Solution after middle removal of impurities is used for production and other commercial Applications of water treatment agent.
The present invention, using two step displacement methods, chlorine is replaced using the stronger iron powder of reproducibility and aluminium powder according to electrochemical principle
Change the heavy metal ion such as chromium micro in ferrous iron solution, lead, nickel, copper, generation simple substance precipitation.Nitrogen is passed through in course of reaction to keep away
Exempt from metal dust oxidation by air.First add the free acid in iron powder consumption solution and remove a certain amount of heavy metal ion, Gu
The stronger aluminium powder of reproducibility is added after liquid separation to react with heavy metal ion, and removal effect is strengthened by two-step reaction, solves one
The problem of step reaction later stage removal of heavy metal ions efficiency declines, it can effectively realize the up to standard and protochloride of each heavy metal ion
The recycling of ferrous solution.The reaction principle of method is as follows：
Al0→Al3++3e E0=1.662 V
Fe0→Fe2++2e E0=0.440 V
Pb2++2e→Pb0 E0=-0.126 V
Ni2++2e→Ni0 E0=-0.246 V
Cr3++3e→Cr0 E0=-0.744 V
Cu2++2e→Cu0 E0=0.337 V
Compared with prior art, the beneficial effects of the present invention are：
1. the present invention can effectively avoid the interference of solution ferrous ions heavy metal ion remaval, to the weight such as chromium, lead, nickel, copper
Metal ion is respectively provided with good removal effect；
Oxidation of iron powder causes heavy metal ion during 2. the present invention solves single step reaction by nitrogen protection and two-step reaction
The problem of removal efficiency declines, enhances the removal effect of heavy metal ion, can be used for heavy metal ion under various concentrations
Removal, expand the scope of application；
3. the present invention is raw materials used cheap and easy to get, flow simple possible, workable, processing cost is low, application easy to spread.
Embodiment
Technical scheme is expanded on further below in conjunction with specific embodiment.It should declare, following examples
Only as to the illustrative and not limiting of technical scheme.Those skilled in the art is it should be understood that to skill of the invention
Any improvement and equivalence replacement that art scheme is carried out, without departing from the spirit and scope of technical solution of the present invention, all should cover
In scope of the presently claimed invention.
Embodiment 1：
The removal of the heavy metal ion such as chromium, nickel, lead, copper in solution of ferrous chloride A：
Step（1）：300 mL solution of ferrous chloride are taken respectively in two 500 mL round-bottomed flasks that numbering is 1,2, are added respectively
Enter 9.0 g iron powders, be passed through nitrogen, reacted at 300 r/min mechanical agitation, 60 DEG C, react 4 h, be separated by filtration, use inductance
Coupled Plasma-Atomic emission spectrometer measure chromium, nickel, lead, the content of copper.
Step（2）：Filtrate is taken to be separately added into 4.5 g aluminium powder in two 500 mL round-bottomed flasks that numbering is 1,2,
Nitrogen is passed through, is reacted at 300 r/min mechanical agitation, 60 DEG C, the reaction time is 2 h, is separated by filtration, with inductive etc.
Gas ions-Atomic Emission Spectrometer AES measure chromium, nickel, lead, the content of copper.
The content of original solution ferrous ions uses titration measuring, is as a result 70.2 g/L.
The removal experimental result of heavy metal ion in the solution of ferrous chloride A of table 1
From experimental result, the step displacement method of iron powder-aluminium powder two has to the chromium in solution of ferrous chloride A, nickel, lead, copper ion
Good removal effect, second step processing significantly improve clearance to lead, nickel ion, and chromium, nickel, lead, copper ion are always gone
Except rate respectively reaches 100%, 75.2%, 95.0% and 100%.
Embodiment 2：
The removal of the heavy metal ion such as chromium, nickel, lead in solution of ferrous chloride B：
Step（1）：300 mL solution of ferrous chloride are taken respectively in two 500 mL round-bottomed flasks that numbering is 1,2, are added respectively
Enter 9.0 g iron powders, be passed through nitrogen, reacted at 300 r/min mechanical agitation, 60 DEG C, react 3 h, be separated by filtration, use inductance
Coupled Plasma-Atomic emission spectrometer measure chromium, nickel, the content of lead.
Step（2）：Filtrate is taken to be separately added into 6.0 g aluminium powder in two 500 mL round-bottomed flasks that numbering is 1,2,
Nitrogen is passed through, is reacted at 300 r/min mechanical agitation, 60 DEG C, the h of reaction time 6, is separated by filtration, with inductive etc.
Gas ions-Atomic Emission Spectrometer AES measure chromium, nickel, the content of lead.
The content of original solution ferrous ions uses titration measuring, is as a result 80.0 g/L.
The removal experimental result of heavy metal ion in the solution of ferrous chloride B of table 2
From experimental result, the step displacement method of iron powder-aluminium powder two has fine to the chromium in solution of ferrous chloride B, nickel, lead ion
Removal effect, second step processing significantly improves clearance to lead, nickel ion, and chromium, nickel, the clearance of lead ion reach respectively
To 100%, 76.7% and 94.9%.
Embodiment 3：
The removal of the heavy metal ion such as chromium, nickel, lead, copper in solution of ferrous chloride C：
Step（1）：300 mL solution of ferrous chloride are taken to add respectively in two 500 mL round-bottomed flasks that numbering is 1,2 respectively
Enter 4.5 g iron powders, be passed through nitrogen, reacted at 300 r/min mechanical agitation, 60 DEG C, react 3 h, be separated by filtration, use inductance
Coupled Plasma-Atomic emission spectrometer measure chromium, nickel, lead.The content of copper.
Step（2）：Filtrate is taken to be separately added into 2.2 g aluminium in two 500 mL round-bottomed flasks that numbering is 1,2 respectively
Powder, nitrogen is passed through, is reacted at 300 r/min mechanical agitation, 60 DEG C, the h of reaction time 4, be separated by filtration, use inductive
Plasma-Atomic Emission spectrophotometer chromium, nickel, the content of lead.
The content of original solution ferrous ions uses titration measuring, is as a result 63.2 g/L.
The removal experimental result of heavy metal ion in the solution of ferrous chloride C of table 3
From experimental result, the step displacement method of iron powder-aluminium powder two has to the chromium in solution of ferrous chloride C, nickel, lead, copper ion
Good removal effect, second step processing significantly improve to chromium, lead, nickel ion clearance, chromium, nickel, lead, copper ion are gone
Except rate respectively reaches 98.8%, 55.0%, 95.4% and 100%.
Claims (4)
- A kind of 1. minimizing technology of heavy metal ion in solution of ferrous chloride, it is characterised in that using two step removal method, specific step It is rapid as follows：（1）Take solution of ferrous chloride and iron powder to add in closed reactor, nitrogen is passed through into reactor, is carried out under mechanical agitation Reaction, reaction carry out separation of solid and liquid to reaction solution after terminating, obtain filtrate；Wherein：The amount of iron powder is the g/L of 0.1 g/L ~ 30；（2）To step（1）Aluminium powder is added in gained filtrate, nitrogen is passed through into reactor, is reacted under mechanical agitation, to institute Obtain reaction solution and carry out separation of solid and liquid, the solution after being cleaned；The amount of aluminium powder is the g/L of 0.5 g/L ~ 20.
- 2. minimizing technology according to claim 1, it is characterised in that step（1）Described in reaction temperature be 30 ~ 80 DEG C, Reaction time is 2 ~ 8 h, and the rotating speed of control machinery stirring is 10 ~ 400 rpm.
- 3. minimizing technology according to claim 1, it is characterised in that step（2）Described in reaction temperature be 30 ~ 80 DEG C, Reaction time is 2 ~ 8 h, and the rotating speed of control machinery stirring is 10 ~ 400 rpm.
- 4. minimizing technology according to claim 1, it is characterised in that step（2）Solution after middle removal of impurities is used for water process The production of agent and other commercial Applications.
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| CN201710345789.8A CN107416960A (en) | 2017-05-17 | 2017-05-17 | The minimizing technology of heavy metal ion in a kind of solution of ferrous chloride |
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| CN201710345789.8A CN107416960A (en) | 2017-05-17 | 2017-05-17 | The minimizing technology of heavy metal ion in a kind of solution of ferrous chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392955A (en) * | 2020-04-29 | 2020-07-10 | 徐芬 | Industrial waste water heavy metal element extraction element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864153A (en) * | 2014-03-12 | 2014-06-18 | 红板（江西）有限公司 | Method for extracting copper and preparing polymerization ferric chloride by replacement of acidic etching liquid of PCB (printed circuit board) factory |
| CN105668754A (en) * | 2016-03-10 | 2016-06-15 | 湘潭大学 | Method for removing trace of heavy metal and nonmetal impurities in waste acid cleaning liquor |
| CN106554047A (en) * | 2016-11-22 | 2017-04-05 | 同济大学 | It is a kind of to process heavy metal cation waste water and the synchronous method for reclaiming metal oxygen-containing acid group |
-
2017
- 2017-05-17 CN CN201710345789.8A patent/CN107416960A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864153A (en) * | 2014-03-12 | 2014-06-18 | 红板（江西）有限公司 | Method for extracting copper and preparing polymerization ferric chloride by replacement of acidic etching liquid of PCB (printed circuit board) factory |
| CN105668754A (en) * | 2016-03-10 | 2016-06-15 | 湘潭大学 | Method for removing trace of heavy metal and nonmetal impurities in waste acid cleaning liquor |
| CN106554047A (en) * | 2016-11-22 | 2017-04-05 | 同济大学 | It is a kind of to process heavy metal cation waste water and the synchronous method for reclaiming metal oxygen-containing acid group |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392955A (en) * | 2020-04-29 | 2020-07-10 | 徐芬 | Industrial waste water heavy metal element extraction element |
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Application publication date: 20171201 |
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