CN102477494A - New method for rapid separation and enrichment of heavy metal ion - Google Patents
New method for rapid separation and enrichment of heavy metal ion Download PDFInfo
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- CN102477494A CN102477494A CN2010105544808A CN201010554480A CN102477494A CN 102477494 A CN102477494 A CN 102477494A CN 2010105544808 A CN2010105544808 A CN 2010105544808A CN 201010554480 A CN201010554480 A CN 201010554480A CN 102477494 A CN102477494 A CN 102477494A
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- separation
- heavy metal
- metal ion
- cadmium
- enrichment
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Abstract
A new method for rapid separation and enrichment of heavy metal ions. The invention relates to the separation of heavy metal ion cadmium by fuzzy prediction technology, and particularly relates to a prediction model of the separation and enrichment of heavy metal ion cadmium based on fuzzy prediction. Research of the separation and enrichment of trace cadmium by PEG 6000-(NH4)2SO4-H2O comprises the generation of empirical rules simulating expert knowledge from acquired data under certain conditions, and the establishment of the mapping relation of effect factors of interference conditions on trace cadmium. The separation process can be predicted by these rules only if a group of conditions are set, and the best separation conditions are determined, which comprise 10 mL of 30% PEG 6000, 5 g of (NH4)SO4, pH=2.0, 2.5 ml of 0.1 g/ml KI solutions, 0.5 ml of 5*10<-3> mol/L crystal violet solutions. Thereby the related complicated test is simplified. The method has less investment, a high metal ion recovery rate, and simple and convenient operations, and basically controls the harm of heavy metal ion cadmium in the environment to human body.
Description
Technical field
The present invention relates to a kind of method of heavy metal ion cadmium concentration and separation, specifically is a kind ofly to utilize PEG6000-(NH through fuzzy prediction technology
4)
2SO
4-H
2The O system is to the research method of the separation and concentration of heavy metal ion cadmium, makes it the cadmium enrichment fast of heavy metal ion and separates, and this method is used for environmental protection treatment fields such as environment protection, environmental monitoring, and effect is better.
Background technology
The concentration and separation of heavy metal ion is the problem that environmental protection treatment field back warp often runs into.But because some parameters are very complicated, be difficult to control in sepn process, make some conventional separation and mensuration often be difficult to obtain satisfied result.Though the appearance of the sensitive developer that some are new and the application of calculating light-intensity method flow injection light-intensity method; Separation that makes heavy metal ion and enrichment are obtained very fast development; But still can't for a long time, stably drop into operation automatically, seriously restricted the further raising of separation automation level.In various advanced control strategies, fuzzy prediction technology is that a kind of of application potential arranged at present very much.It adopts control strategies such as multi-step prediction, rolling optimization and feedback compensation, thereby controls effective.The present invention uses fuzzy prediction technology and confirms some parameters in the sepn process of heavy metal ion cadmium, sets up appropriate scheme fast enriching cadmium separation.This method less investment, metals ion recovery height, simple to operation.
Summary of the invention
It is very complicated the present invention relates to a kind of some parameters to heavy metal ion cadmium concentration and separation process, and unmanageable characteristics make some conventional separation be difficult to obtain satisfied result.Propose a kind of method of heavy metal ion cadmium concentration and separation, proposed a kind of heavy metal ion cadmium enrichment and separation prediction model based on fuzzy control.Utilize PEG6000-(NH
4)
2SO
4-H
2The O system under certain conditions promptly, produces the empirical rule of simulating expert knowledge to the research of the separation and concentration of heavy metal ion cadmium from the data of being gathered, set up the mapping relations of disturbed condition to the influence factor of Trace Cadmium.As long as setting a set condition just can predict this sepn process through these rules.Concrete steps:
In the ground tube comparison tubes of 50ml, add the potassiumiodide of 2.5ml0.1g/ml successively, concentration is 5 * 10
-3The crystal violet solution 0.5ml of mol/L, a certain amount of liquid to be measured adds 30% PEG6000 solution 10ml again, shakes up, and adds buffered soln and regulates the pH value, and be diluted with water to 25ml.The ammonium sulfate solids that adds 5.0g was then vibrated 5 minutes, left standstill, treat layering after, the 50ml tube comparison tubes is put in lower floor's phase-splitting, be diluted with water to scale and measure zinc content.Move into upper strata PEG6000 in addition mutually in the tube comparison tubes of 50ml, regulate acidity, be diluted with water to scale.Vibration shakes up, and with the cuvette of 1cm, is that reference is measured in the 590nm place with the reagent corresponding blank, finds corresponding cadmium content from working curve then.
The beneficial effect of the inventive method is that the concentration and separation that adopts fuzzy prediction technology to carry out the heavy metal ion cadmium can obtain efficient, stable control effect.Adopt fuzzy prediction technology to make Trace Cadmium in very short time, just can confirm the scheme that extracts, its enrichment degree can reach 100%, and separation efficiency is high, and less investment, the metals ion recovery are up to 100%, simple to operation.Be suitable for environment-friendly disposal systems such as environment protection, environmental monitoring and carry out prevention initiatively and the pollution that controls environment.
Realization the object of the invention is further described:
The separation and concentration process of heavy metal ion cadmium often has bigger inertia and hysteresis, and become when being non-linear and slow.Can predictive control be successfully applied to a key issue of the separation and concentration process control of cadmium.Adopt the predictive model of the separation and concentration condition of fuzzy control cadmium.Promptly on the basis of test, from the data of being gathered, produce the empirical rule of simulating expert knowledge, set up the mapping relations of the consumption of acidity, developer consumption, phase-splitting salt the influence factor of percentage extraction and cadmium mensuration.Like this in trial stretch, just can predict this separation and mensuration process cadmium percentage extraction condition as long as set one group, thereby simplify the sophisticated testing of being correlated with through these rules.
When establishing the fuzz variable that E is a condition part, i.e. H
2SO
4The consumption of solution, developer crystal violet solution consumption, phase-splitting salt (NH
4)
2SO
4Consumption, the consumption of KI solution and the concentration of PEG6000; The fuzz variable of the corresponding conclusion part of U, the i.e. percentage extraction of heavy metal ion cadmium.Utilize fuzzy control technology, confirm input, output variable membership function earlier, from existing testing data, set up fuzzy rule base; Final through the reverse gelatinization, dope the percentage extraction of heavy metal ion cadmium.
In trial stretch, obtained at crystal violet solution consumption 0.5ml, phase-splitting salt (NH
4)
2SO
4The concentration of consumption 2.5mL and PEG6000 of consumption 5g, KI solution be under 30% the condition, to carry out the isolating top condition experimental data of heavy metal ion cadmium.Utilize fuzzy control technology to import, export the precision and quantity-variation obfuscation, set up fuzzy rule base, the non-linear of the two with the time become relation and reflect.Like this, when setting one group of data, just can the isolating top condition of cadmium be predicted out through this fuzzy control model.Top condition is: the 10mL of 30% PEG6000 and (NH
4)
2SO
4The KI solution, 5 * 10 of 5g, pH=2.0,2.5ml 0.1g/ml
-3The crystal violet solution 0.5ml of mol/L.The relative error of measured value and predictor demonstrates anastomose property preferably between-4～+ 4%.
Claims (3)
1. the isolating method of heavy metal ion enrichment is characterized in that, has set up a kind of heavy metal ion enrichment separation prediction model based on fuzzy control, makes the very fast enrichment of heavy metal ion.The method of concrete concentration and separation was divided into for two stages and carries out as follows:
Stage 1: utilize PEG6000-(NH
4)
2SO
4-H
2The O system is to the research of the separation and concentration of heavy metal ion cadmium, and the utilization fuzzy prediction technology is measured fast influences the isolating disturbance of heavy metal ion cadmium source, establishes suitable separation condition.
Stage 2: under appropriate separation condition, the heavy metal ion cadmium is carried out concentration and separation.
2. the method for heavy metal ion cadmium concentration and separation according to claim 1; It is characterized in that; In stage 1,, set up a fuzzy mathematical model that comprises various disturbances according to influencing its isolating disturbance source in the heavy metal ion cadmium separation and concentration process; Adopt fuzzy prediction technology to carry out the concentration and separation prediction and the control of heavy metal ion cadmium, establish suitable separation condition.
3. the method for heavy metal ion cadmium concentration and separation according to claim 1 is characterized in that, in the stage 2, under the very high condition of enrichment content, launches separation system fast and carries out separation and Extraction, makes the recovery of the heavy metal ion cadmium in the water reach 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105544808A CN102477494A (en) | 2010-11-23 | 2010-11-23 | New method for rapid separation and enrichment of heavy metal ion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105544808A CN102477494A (en) | 2010-11-23 | 2010-11-23 | New method for rapid separation and enrichment of heavy metal ion |
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| Publication Number | Publication Date |
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| CN102477494A true CN102477494A (en) | 2012-05-30 |
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| CN2010105544808A Pending CN102477494A (en) | 2010-11-23 | 2010-11-23 | New method for rapid separation and enrichment of heavy metal ion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477379A (en) * | 2021-07-29 | 2021-10-08 | 九江一晖环保集团有限公司 | Waste metal recovery method based on material balance |
-
2010
- 2010-11-23 CN CN2010105544808A patent/CN102477494A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477379A (en) * | 2021-07-29 | 2021-10-08 | 九江一晖环保集团有限公司 | Waste metal recovery method based on material balance |
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Application publication date: 20120530 |