CN103028598A - Application of polyacrylamide in removal of soil heavy metal zinc pollution - Google Patents
Application of polyacrylamide in removal of soil heavy metal zinc pollution Download PDFInfo
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- CN103028598A CN103028598A CN2013100037497A CN201310003749A CN103028598A CN 103028598 A CN103028598 A CN 103028598A CN 2013100037497 A CN2013100037497 A CN 2013100037497A CN 201310003749 A CN201310003749 A CN 201310003749A CN 103028598 A CN103028598 A CN 103028598A
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Abstract
The invention discloses application of polyacrylamide in removal of soil heavy metal zinc pollution. The polyacrylamide is prepared to 0.05 wt% of leacheate; chemical eluant is added in zinc polluted soil by the liquid-solid ratio of 10: 1 (ml/g); and eluate is oscillated, centrifuged and collected at the room temperature to finish the elution process. Compared with the prior art, the application has the benefits that the chemical eluant adopted by the application has simple formula, reasonable concentration design, remarkable effect and prominent removing effect on zinc ions in the soil. The chemical eluant adopted by the application caters to heavy metal polluted soil with low and high concentrations; and tests show that the elution rates of three types of polyacrylamide to the low-concentration zinc polluted soil are all above 60%, the elution rates of three types of polyacrylamide to the high-concentration zinc polluted soil are all above 50%, and in the elution of the polluted soil with low and high concentrations, the cationic polyacrylamide has better elution effect than another two types of polyacrylamide.
Description
Technical field
The present invention relates to the recovery technique field of Heavy Metals In Environment, namely utilize the utilization of polyacrylamide drip washing remediating heavy metal Grown In Zinc Contaminated Soil.
Background technology
Along with fast development economic and society, human exploitation dynamics to resources and environment constantly increases, so that environmental problem highlights day by day, the compound that has in a large number genotoxic potential is discharged into biosphere, comprising heavy metal.Heavy metal pollution of soil is exactly one of environmental problem of causing of exploitation of mineral resources.According to relevant expert's statistics, China is subjected to nearly 2000 * 104 hm2 of the cultivated area of heavy metal pollution at present, accounts for 1/5 of total area under cultivation.And in the past 50 years, the Zn that is discharged in the environment is about 1.35 * 106t.
Yet the characteristics such as heavy metal pollution of soil has disguise is arranged, chronicity and refractory organics.And heavy metal is by Transport And Transformation in soil-plant, and accumulation and amplification that The book of Changes is crossed food chain produce larger toxic action to the mankind, and human life and health in serious threat.Therefore, the improvement of heavy metal pollution of soil has become a thorny difficult problem in the environmental pollution improvement, has also become the in the world focus of research.
Zinc is as the essential heavy metal element of a Plants, and its status is very special.There are some researches show that the Zn of low dosage can promote growing of plant, the Zn of high concentration then can damage plant, affects growing of plant, when the plant zinc content〉during 50 mg/kg, zinc poisoning will occur.Along with Zn fertilizer is widely used in agricultural and the exploitation of plumbous zinc ore and the discharging of industrial wastewater, a large amount of entered environments of Zn element and compound thereof.Make Zn element in the environment surpass the needs of plant normal growth, it is aobvious outstanding that the zinc of plant is poisoned problem day.Therefore, zinc is one of metallic element of extensive concern in agricultural sciences and the Research of Environmental Sciences.The research of heavy metal pollution of soil and improvement method thereof has become extremely urgent problem.
Restorative procedure to heavy metal mainly contains physics reparation, chemistry reparation, microorganism reparation and phytoremediation etc.Soil washing belongs to the heavy metal chemical repair method, namely is to utilize chemistry or biological eluent to strengthen the animal migration of heavy metal in soil, thereby heavy metal is effectively removed from soil.The Soil leaching recovery technique can remove pollutant fast from soil, finish the improvement of high density pollution soil in short time, and control expense is relatively cheap, has now become one of the focus of contaminated soil fast repair technique research and developing direction, has preferably actual application prospect.
At present, the normal eluent that uses comprises take hydrochloric acid, sulfuric acid as main inorganic eluent in scientific research and practice, and the organic acid take citric acid as representative and take EDTA (ethylenediamine tetra-acetic acid), EDDS(ethylenediamine butanedioic acid) be main artificial chelating agent.Yet, studies show that strong acid eluent meeting spoiled soil structure in lessivation; Organic eluent such as EDTA in soil residual long may poison geobiont and after causing drip washing soil be difficult to again utilize.
Summary of the invention
Purpose of the present invention is exactly to provide the application of polyacrylamide in heavy metal zinc polluted soil earth is repaired for the deficiencies in the prior art.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
The application of polyacrylamide (PAM) in removing the heavy metal-polluted soil zinc pollution, polyacrylamide is mixed with the leacheate of 0.05wt%, by 10:1(ml/g) liquid-solid ratio chemical leaching is added Grown In Zinc Contaminated Soil, at room temperature vibration, centrifugal, collect eluate and can finish lessivation.
Polyacrylamide among the present invention (PAM) is a kind of high molecular weight water soluble polymer.Through experimental study, prove that it has good drip washing effect to heavy metal zinc (Zn).The present invention takes full advantage of polyacrylamide to the good removal ability of heavy metal, used as drip washing heavy metal zinc (Zn) contaminated soil, the heavy metal in the soil is transferred in the leacheate, and is reached the purpose that reduces Zn content in the contaminated soil.
Compared with prior art, the invention has the beneficial effects as follows:
1. the used chemical leaching agent prescription of the present invention is simple, and concentration is reasonable in design, and effect is remarkable, and the zinc ion that exists in the soil is had very outstanding removal effect.Being applied to Grown In Zinc Contaminated Soil, to have a cost low, the washout rate high.
2. the used chemical leaching of the present invention is for low, high concentration heavy-metal contaminated soil, and show by test: the polyacrylamide of three types to the Soil leaching rate of low concentration zinc pollution all more than 60%, and at Treatment with High Concentration Zinc contaminated soil washout rate all more than 50%, and in low, high density pollution Soil leaching, the more other two types of polyacrylamide drip washing successfuls of cationic-type polyacrylamide are better.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Be respectively that the PAMC, PAMA of 0.05wt% and non-ionic polyacrylamide eluent 20ml add 2g and fill in the 100ml plastic bottle that zinc pollution concentration is respectively 1000mg/kg and 10000mg/kg agricultural land soil sample with the concentration for preparing, each is processed three times and repeats; Then at room temperature vibrated 2 hours, hunting speed is 200 rev/mins, subsequently the eluate in the reagent bottle is transferred in the centrifuge tube with 4000 rev/mins speed centrifugal 15 minutes.Get its supernatant liquid filtering, again with utilizing the atom spectrophotometric to say the content (table 1) of measuring Zn in the leacheate.
By analysis, the polyacrylamide of three types is 61.65-67.79% to the Soil leaching rate of low concentration zinc pollution, and is 51.28-52.10% at Treatment with High Concentration Zinc contaminated soil washout rate.The drip washing result of two kinds of concentration contaminated soils shows that the more other two types of polyacrylamide drip washing successfuls of cationic-type polyacrylamide are better.
In sum, polyacrylamide has preferably effect as chemical leaching to repairing the low-concentration heavy metal Grown In Zinc Contaminated Soil.
The content of heavy metal Zn in table 1 leacheate
Annotate: data are the mean value of 3 repetitions in the table.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (1)
1. the application of polyacrylamide in removing the heavy metal-polluted soil zinc pollution, it is characterized in that, polyacrylamide is mixed with the leacheate of 0.05wt%, by 10:1(ml/g) liquid-solid ratio chemical leaching is added Grown In Zinc Contaminated Soil, at room temperature vibration, centrifugal, collect eluate and can finish lessivation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100037497A CN103028598A (en) | 2013-01-06 | 2013-01-06 | Application of polyacrylamide in removal of soil heavy metal zinc pollution |
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| CN2013100037497A CN103028598A (en) | 2013-01-06 | 2013-01-06 | Application of polyacrylamide in removal of soil heavy metal zinc pollution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639187A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring zinc polluted soil with 2-hydroxyphosphonoacetic acid (HPAA) |
| CN105536722A (en) * | 2016-01-14 | 2016-05-04 | 黄文辉 | Composite adsorbent for adsorbing heavy metal and preparation method thereof |
| CN105536735A (en) * | 2016-01-14 | 2016-05-04 | 黄文辉 | Composite adsorbent for heavy metal and preparation method of composite adsorbent |
| CN105728452A (en) * | 2014-12-12 | 2016-07-06 | 中国科学院沈阳应用生态研究所 | Crust-breaking agent and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362145A (en) * | 2008-09-12 | 2009-02-11 | 中山大学 | Chemical leaching repairing method for heavy metal and arsenic mercury contaminated soil |
| CN102580989A (en) * | 2012-03-01 | 2012-07-18 | 四川农业大学 | Application of polyacrylamide in amaranthus hypochondriacus for restoring soil polluted by heavy metal cadmium |
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2013
- 2013-01-06 CN CN2013100037497A patent/CN103028598A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362145A (en) * | 2008-09-12 | 2009-02-11 | 中山大学 | Chemical leaching repairing method for heavy metal and arsenic mercury contaminated soil |
| CN102580989A (en) * | 2012-03-01 | 2012-07-18 | 四川农业大学 | Application of polyacrylamide in amaranthus hypochondriacus for restoring soil polluted by heavy metal cadmium |
Non-Patent Citations (2)
| Title |
|---|
| 甘文君等: "电镀厂污染土壤重金属形态及淋洗去除效果", 《生态与农村环境学报》, vol. 28, no. 1, 25 January 2012 (2012-01-25), pages 82 - 87 * |
| 罗文林: "陕北矿区植被和施入PAM对坡面土壤铜元素的影响", 《中国优秀硕士学位论文全文数据库》, no. 11, 11 November 2008 (2008-11-11), pages 043 - 71 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639187A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring zinc polluted soil with 2-hydroxyphosphonoacetic acid (HPAA) |
| CN105728452A (en) * | 2014-12-12 | 2016-07-06 | 中国科学院沈阳应用生态研究所 | Crust-breaking agent and application thereof |
| CN105536722A (en) * | 2016-01-14 | 2016-05-04 | 黄文辉 | Composite adsorbent for adsorbing heavy metal and preparation method thereof |
| CN105536735A (en) * | 2016-01-14 | 2016-05-04 | 黄文辉 | Composite adsorbent for heavy metal and preparation method of composite adsorbent |
| CN105536735B (en) * | 2016-01-14 | 2018-10-19 | 罗军 | A kind of heavy metal composite adsorbent and preparation method thereof |
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Application publication date: 20130410 |