CN104492799A - Method for extracting heavy metal from soil - Google Patents
Method for extracting heavy metal from soil Download PDFInfo
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- CN104492799A CN104492799A CN201410708460.XA CN201410708460A CN104492799A CN 104492799 A CN104492799 A CN 104492799A CN 201410708460 A CN201410708460 A CN 201410708460A CN 104492799 A CN104492799 A CN 104492799A
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Abstract
The invention provides a method for extracting heavy metal from soil. The method comprises the steps of (1) drying soil in the sun, removing impurities, grinding, and then sieving by a sieve being 80 to 100 meshes; (2) feeding a lemon solution into the ground soil, agitating for 8 to 10 hours, then feeding an aspartic acid solution, and agitating for 8 to 10 hours; (3) centrifugally separating after the reaction of soil and the acid solutions is done, and then pouring out supernatant; and (4) feeding deionized water into turbid solution, cleaning, centrifugally separating, then pouring out the supernatant to obtain clean soil. According to the method, the lemon solution and the aspartic acid solution are utilized for extracting the heavy metal, the cost is low, the method is simple, the operation is easy, and the applicable scope is wide; the optimal extracting process conditions are adopted according to the properties of the heavy metal in the soil, so that the extracting efficiency is high, and the effect is obvious; the method is particularly suitable for extracting of heavy metal in soil.
Description
Technical field
The present invention relates to a kind of method of lixiviate heavy metal, be specifically related to a kind of method of lixiviate heavy metal in soil.
Background technology
Along with China's plating, electronics industry, metallurgical industry lamp industrial expansion, and Crop fertilizer uses in a large number, and the pollution problem of heavy metal-polluted soil is very outstanding.The increase of heavy metal-polluted soil particularly cadmium content can make bacterium in soil, the quantity of nitrogen-fixing bacteria obviously reduces, and can destroy the chlorophyll in plant, reduces the absorption of root system to moisture and nutrient, suppresses root system to nitrogen fixation and nitrate reductase activity.After cadmium enters human body by food chain, make them lose activity with the specified protein in human body and various enzyme generation kickback, and savings get up to cause slow poisoning in some organ of human body, also disturbs copper, cobalt, zinc eubolism in vivo simultaneously, bring out various disease, even dead.
At present, the Heavy Metal Pollution Control of soil mainly contains: soil moved in improve the original method, and the method is only applicable to the little soil of contaminated area, and cost is high, complicated operation; Turn over method, the method has certain limitation, is not suitable for the situation that pollutant levels are high or soil layer is shallow below topsoil; Agro-ecology reclamation activities, the method repair time is long, effect is also undesirable.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of applied widely, cost is low, the method for the lixiviate heavy metal in soil of Be very effective.
In order to achieve the above object, the technical scheme that the present invention takes is:
A method for lixiviate heavy metal in soil, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 80 ~ 100 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, adds the aspartic acid solution that concentration is 0.8moL/L again, stir 8 ~ 10h after stirring 8 ~ 10h;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
As optimal technical scheme, in order to the process conditions making the condition of lixiviate heavy metal reach best, with the heavy metal in lixiviate soil as far as possible, adding the citric acid solution preferably time of stirring in described step (2) is 9h.
As optimal technical scheme, in order to the process conditions making the condition of lixiviate heavy metal reach best, with the heavy metal in lixiviate soil as far as possible, adding the aspartic acid solution preferably time of stirring in described step (2) is 9h.
As optimal technical scheme, in order to make soil as far as possible with citric acid solution and aspartic acid solution reaction, to improve extracting efficiency, the mixing speed after soil adds acid solution in described step (2) is 250r/min.
Compared with prior art, the beneficial effect that the present invention has: utilize the heavy metal in citric acid solution and aspartic acid solution lixiviate soil, cost is low, method is simple, be easy to operation, the scope of application is wide, adopt best extracting technology condition according to the heavy metal character in soil, extracting efficiency is high, Be very effective.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
A method for lixiviate heavy metal in soil, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 80 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, adds the aspartic acid solution that concentration is 0.8moL/L again, stir 8h after stirring 8h;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
Embodiment 2
A method for lixiviate heavy metal in soil, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 90 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, adds the aspartic acid solution that concentration is 0.8moL/L again, stir 9h after stirring 8h;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
Embodiment 3
A method for lixiviate heavy metal in soil, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 100 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, and being add the aspartic acid solution that concentration is 0.8moL/L again after 250r/min stirs 9h with speed, is that 250r/min stirs 9h with speed;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
Embodiment 4
A method for lixiviate heavy metal in soil, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 100 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, is add the aspartic acid solution that concentration is 0.8moL/L again after 250r/min stirs 10h, stirs 10h with speed;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
It should be pointed out that above case is only the representational example of the present invention.Obviously, technical scheme of the present invention is not limited to above-described embodiment, can also have many sex change.
Claims (4)
1. a method for lixiviate heavy metal in soil, is characterized in that, comprises the following steps:
(1) dry soil, remove foreign material, pulverize rear mistake 80 ~ 100 mesh sieve and obtain fine and smooth soil, and mix;
(2) being 1:20 by solid-liquid ratio adds to the soil after pulverizing the citric acid solution that concentration is 0.4moL/L, adds the aspartic acid solution that concentration is 0.8moL/L again, stir 8 ~ 10h after stirring 8 ~ 10h;
(3) after soil and acid solution reaction terminate, be placed in the centrifuge separation 15min that rotating speed is 3 000r/rain, pour out supernatant;
(4), after 1:2 adds washed with de-ionized water in turbid liquid by volume, be placed in the centrifuge separation 20min that rotating speed is 2500r/rain, after pouring out supernatant, can clean soil be obtained.
2. the method for a kind of lixiviate heavy metal in soil according to claim 1, is characterized in that: adding the citric acid solution preferably time of stirring in described step (2) is 9h.
3. the method for a kind of lixiviate heavy metal in soil according to claim 1, is characterized in that: adding the aspartic acid solution preferably time of stirring in described step (2) is 9h.
4. a kind of method of lixiviate heavy metal in soil according to claims 1 to 3 any one, is characterized in that: the mixing speed after soil adds acid solution in described step (2) is 250r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708460.XA CN104492799A (en) | 2014-11-28 | 2014-11-28 | Method for extracting heavy metal from soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410708460.XA CN104492799A (en) | 2014-11-28 | 2014-11-28 | Method for extracting heavy metal from soil |
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| CN104492799A true CN104492799A (en) | 2015-04-08 |
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| CN201410708460.XA Pending CN104492799A (en) | 2014-11-28 | 2014-11-28 | Method for extracting heavy metal from soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702972A (en) * | 2017-09-07 | 2018-02-16 | 暨南大学 | Application of the titanium dioxide in the preceding processing of ELISA detection heavy metal in soil ion |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125171A (en) * | 2003-10-22 | 2005-05-19 | National Institute For Rural Engineering | Method for removing pollutant from polluted medium |
| CN101014425A (en) * | 2004-09-10 | 2007-08-08 | 中部电力株式会社 | Method of purifiying heavy metal-containing soil |
| CN101157861A (en) * | 2007-11-07 | 2008-04-09 | 华东理工大学 | Application of polyaspartic acid in repairing heavy-metal polluted soil |
| WO2009054368A1 (en) * | 2007-10-22 | 2009-04-30 | Showa Denko K. K. | Method for washing soil containing cyanogen compound, and microorganism for use in the washing method |
| JP2010082600A (en) * | 2008-10-02 | 2010-04-15 | Mitsubishi Gas Chemical Co Inc | Method of cleaning soil and/or groundwater |
-
2014
- 2014-11-28 CN CN201410708460.XA patent/CN104492799A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125171A (en) * | 2003-10-22 | 2005-05-19 | National Institute For Rural Engineering | Method for removing pollutant from polluted medium |
| CN101014425A (en) * | 2004-09-10 | 2007-08-08 | 中部电力株式会社 | Method of purifiying heavy metal-containing soil |
| WO2009054368A1 (en) * | 2007-10-22 | 2009-04-30 | Showa Denko K. K. | Method for washing soil containing cyanogen compound, and microorganism for use in the washing method |
| CN101157861A (en) * | 2007-11-07 | 2008-04-09 | 华东理工大学 | Application of polyaspartic acid in repairing heavy-metal polluted soil |
| JP2010082600A (en) * | 2008-10-02 | 2010-04-15 | Mitsubishi Gas Chemical Co Inc | Method of cleaning soil and/or groundwater |
Non-Patent Citations (2)
| Title |
|---|
| 张华 等: "天冬氨酸和柠檬酸对污泥中重金属萃取的比较研究", 《环境科学》 * |
| 李闪 等: "柠檬酸、天冬氨酸复合酸浸法去除污泥中的重金属研究", 《工业安全与环保》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702972A (en) * | 2017-09-07 | 2018-02-16 | 暨南大学 | Application of the titanium dioxide in the preceding processing of ELISA detection heavy metal in soil ion |
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Application publication date: 20150408 |