CN101912871A - Method for remedying heavy metal contaminated soil - Google Patents
Method for remedying heavy metal contaminated soil Download PDFInfo
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- CN101912871A CN101912871A CN 201010227901 CN201010227901A CN101912871A CN 101912871 A CN101912871 A CN 101912871A CN 201010227901 CN201010227901 CN 201010227901 CN 201010227901 A CN201010227901 A CN 201010227901A CN 101912871 A CN101912871 A CN 101912871A
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Abstract
With the development of industry and agriculture, human activities, such as the metal excavation and smelting, electroplating, the emission of wastewater, waste gases and waste solids, the use of agricultural chemicals and the like, produce greater influence on the heavy metal distribution of soil to further cause a series of contamination problems. Heavy metal soil contamination destructs the physicochemical properties of the soil, hardens the soil, reduces the quality of agricultural products, and particularly damages animal health and human health because crops have an enrichment function on harmful heavy metals. The invention provides a method for remedying heavy metal contaminated soil. In the method, an environmentally-friendly natural high-molecular polymer is adopted to chelate the heavy metals absorbed into the soil, and plants are utilized to absorb and remove the heavy metals so as to fulfill the aim of remedying the soil, wherein the natural high-molecular polymer has vast sources and low cost, and is convenient to prepare or extract.
Description
Technical field
The present invention relates to a kind of method of utilizing shitosan and phytoremediation heavy-metal contaminated soil, belong to the soil remediation technical field.
Background technology
Heavy metal is the pollutant that a class has potential hazard in the soil environment.Along with the development of industrial and agricultural production, such as the digging and the metallurgy industry of metal, electroplating industry, the discharging of the three wastes and the human activities such as use of agricultural chemicals are increasing to the influence that heavy metal-polluted soil distributes, so that have produced a series of pollution problem.
Heavy metal pollution of soil can cause that the soil normal function is destroyed, and as destroying the physicochemical property of soil, makes soil compaction, reduces the quality of agricultural product, particularly by the enrichment of crops to harmful heavy metal.Heavy metal enters food chain after absorbing through crop, can endanger animal and human's body health, also may be by runoff and eluviation polluted surface water and underground water.Heavy metal in the soil is difficult for by biodegradation, has tangible bioconcentration, mainly be that output and the quality that influences crops embodies its harm, so heavy metal pollution of soil there is long incubation period, has characteristics such as the poly-property of disguise, irreversibility, generality and table.
Utilizing chelating agent leaching heavy metal is a kind of new soil remediation technology that developed recently gets up.In contaminated soil, use chelating the metal of solid phase of soil bonding is discharged, increase the concentration and the activity of soil liquid metal ion.In recent years, there are ethylenediamine triacetic acid (HEDTA), ethylenediamine tetra-acetic acid organic sequestering agents such as (EDTA) to be used for soil remediation successively, but these synthetic chemical reagent, toxicity is higher, easily causes secondary pollution.
Summary of the invention
The restorative procedure that the purpose of this invention is to provide a kind of eco-friendly heavy-metal contaminated soil.This method adopts a kind of natural polymers, stings and closes the heavy metal that adsorbs in the soil, utilizes plant absorbing to remove then, reaches the purpose of rehabilitating soil.This natural polymers wide material sources, preparation or extraction are convenient, with low cost.
Natural polymers among the present invention extensively is present in the shells of crustaceans such as shrimp, crab, the epidermis of cockroach, silkworm insects such as (pupas), and in the cell membrane of mushroom such as mushroom.Being only second to cellulose as its reserves on earth of natural polysaccharide, is second largest renewable resource on the earth, and a year biosynthesis amount is about more than 100 hundred million tons.
This natural polymers has excellent biological compatibility and biological degradability, nontoxic and easily biological-degradable, catabolite also has no side effect to human body, do not put aside in vivo, non-immunogenicity once was described as the 6th vital principle after protein, fat, carbohydrate, vitamin and inorganic salts in 1991 by American-European academia.
This natural polymers not only can promote the activation of plant cell, promote plant seed germination, well developed root system, the stimulating plant growth, can also increase egodefense ability to disease and pest, strengthen immunity, and have the function of regulating development of plants, the stem pole is shortened, sturdy vigorous, help nutrient and supply fruit to greatest extent.
Use this natural polymers to make additive, can make soil beneficial bacterium such as actinomyces increase by 1000 times, be harmful to bacterium such as significantly minimizing such as sickle-like bacteria and Nemata, strengthen soil supplying nutrient capability, fundamentally improve the soil, radical cure is hardened, and improves soil organic matter content, is convenient to continuous cropping.
This natural polymers molecular distribution groups such as hydroxy amino and carboxyl, and can form stable chelate by these groups and contents of many kinds of heavy metal ion, help metal ion and move to plant root and be absorbed, can promote the heavy metal in the common plants enriched absorption soil.
Specifically, restorative procedure provided by the invention is with natural polymers or derivatives thereof wiring solution-forming, then with spray solution in soil to be repaired.Plantation absorbs the plant that energy can be strong to heavy metal behind the certain hour.
Natural polymers among the present invention can be shitosan and derivative thereof, chitin and derivative thereof.
Natural polymers can be dissolved in and be prepared into solution in the diluted acid, perhaps makes water soluble derivative, again wiring solution-forming.The diluted acid of dissolve polymer can make citric acid among the present invention, acetate, hydrochloric acid, nitric acid, a kind of in the sulfuric acid.
The concentration of the natural polymers solution among the present invention is 0.01%-5%, and pH is 3-6.
The amount of application of natural polymers solution is that 0.05 ‰-5 ‰ (polymer is to the mass concentration of dry ground, W/W)
The specific embodiment
Give further detailed explanation below by embodiment to the present invention.
Embodiment 1: the preparation of chitosan solution
Getting deacetylation is 84%, and pH is 7.2, and moisture 6.4%, molecular weight are 500,000 shitosan 1g, is dissolved in 100ml 0.1mol/L acetate, stirs 2h at a slow speed shitosan is dissolved fully, obtains 1% chitosan solution.
Embodiment 2: shitosan is to the chelation of heavy metal
The 1% shitosan acid solution for preparing is gone into by native top application, and set shitosan is 1 ‰ after chitosan solution is manured into soil 3d to the mass concentration (W/W) of dry ground, sampling and measuring.The clearance of five kinds of elements is respectively: Cr 30%, and Cu 54%, and Ni 45%, and Pb 53%, and Zn 55%.
Claims (6)
1. the restorative procedure of a heavy-metal contaminated soil is characterized in that adopting a class natural polymers to sting and closes the heavy metal that adsorbs in the soil, utilizes plant absorbing to remove then, reaches the purpose of rehabilitating soil.
2. method according to claim 1 is characterized in that described natural polymers is shitosan and derivative, chitin and derivative thereof.
3. method according to claim 1 is characterized in that natural polymers can be dissolved in to be prepared into solution in the diluted acid, perhaps makes water soluble derivative, again wiring solution-forming.
4. method according to claim 1 is characterized in that the diluted acid of dissolve polymer can make citric acid, acetate, hydrochloric acid, nitric acid, a kind of in the sulfuric acid.
5. method according to claim 1, the concentration that it is characterized in that natural polymers solution is 0.01%-5%, pH is 3-6.
6. method according to claim 1, the amount of application that it is characterized in that natural polymers solution is 0.05 ‰-5 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010227901 CN101912871A (en) | 2010-07-16 | 2010-07-16 | Method for remedying heavy metal contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010227901 CN101912871A (en) | 2010-07-16 | 2010-07-16 | Method for remedying heavy metal contaminated soil |
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| CN101912871A true CN101912871A (en) | 2010-12-15 |
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| CN 201010227901 Pending CN101912871A (en) | 2010-07-16 | 2010-07-16 | Method for remedying heavy metal contaminated soil |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513340A (en) * | 2011-12-13 | 2012-06-27 | 沈阳大学 | Method for repairing soils polluted by heavy metal Cd |
| CN102601105A (en) * | 2012-03-26 | 2012-07-25 | 西安科技大学 | Method for removing heavy metal copper in soil by using plants |
| CN103299740A (en) * | 2013-05-14 | 2013-09-18 | 深圳市如茵生态环境建设有限公司 | Treatment method for recovering mine wasteland vegetation |
| CN103788959A (en) * | 2014-03-03 | 2014-05-14 | 江南大学 | Heavy metal contaminated soil remediation agent and preparing method thereof |
| CN103788960A (en) * | 2014-03-05 | 2014-05-14 | 中国科学院合肥物质科学研究院 | Functional fertilizer and repair agents for repairing soil heavy metal |
| CN103909091A (en) * | 2014-03-31 | 2014-07-09 | 中国有色桂林矿产地质研究院有限公司 | Repairing method for heavy metal polluted soil |
| CN104560047A (en) * | 2014-12-03 | 2015-04-29 | 成都新朝阳作物科学有限公司 | Soil heavy mental passivator and application thereof |
| CN104745198A (en) * | 2015-02-12 | 2015-07-01 | 上海贯发海洋生物科技有限公司 | Preparation method of soil heavy metal curing detoxicant |
| CN104861981A (en) * | 2014-02-21 | 2015-08-26 | 杜建安 | Preparation of soil heavy metal contamination treatment biological preparation, and green ecological restoration project |
| CN105154092A (en) * | 2015-08-21 | 2015-12-16 | 北京雷力海洋生物新产业股份有限公司 | Soil heavy metal passivator and preparation method thereof |
| CN106001090A (en) * | 2016-06-18 | 2016-10-12 | 毛强平 | Adsorption-biological combined remediation method for heavy metal contaminated soil of mine |
| CN107512975A (en) * | 2017-08-16 | 2017-12-26 | 李建国 | Heavy-metal contaminated soil conditioner |
| CN107573197A (en) * | 2017-11-03 | 2018-01-12 | 峨眉山市瑞丰生物科技有限责任公司 | A kind of soil improvement and heavy metal repair special fertilizer |
| CN107876551A (en) * | 2017-08-24 | 2018-04-06 | 中国科学院地理科学与资源研究所 | Eight treasures (choice ingredients of certain special dishes) red-spotted stonecrop repairs method, activator and the application of cadmium and/or lead-contaminated soil |
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| CN1389502A (en) * | 2002-07-24 | 2003-01-08 | 山东美林亚生物科技有限公司 | Heavy metal chelant composite containing chitosan derivative |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513340B (en) * | 2011-12-13 | 2014-02-19 | 沈阳大学 | Method for repairing soils polluted by heavy metal Cd |
| CN102513340A (en) * | 2011-12-13 | 2012-06-27 | 沈阳大学 | Method for repairing soils polluted by heavy metal Cd |
| CN102601105A (en) * | 2012-03-26 | 2012-07-25 | 西安科技大学 | Method for removing heavy metal copper in soil by using plants |
| CN103299740B (en) * | 2013-05-14 | 2015-12-23 | 深圳市如茵生态环境建设有限公司 | The processing method of Abandoned Land of Mine revegetation |
| CN103299740A (en) * | 2013-05-14 | 2013-09-18 | 深圳市如茵生态环境建设有限公司 | Treatment method for recovering mine wasteland vegetation |
| CN104861981A (en) * | 2014-02-21 | 2015-08-26 | 杜建安 | Preparation of soil heavy metal contamination treatment biological preparation, and green ecological restoration project |
| CN103788959A (en) * | 2014-03-03 | 2014-05-14 | 江南大学 | Heavy metal contaminated soil remediation agent and preparing method thereof |
| CN103788959B (en) * | 2014-03-03 | 2016-06-22 | 江南大学 | A kind of heavy-metal contaminated soil renovation agent and preparation method thereof |
| CN103788960A (en) * | 2014-03-05 | 2014-05-14 | 中国科学院合肥物质科学研究院 | Functional fertilizer and repair agents for repairing soil heavy metal |
| CN103788960B (en) * | 2014-03-05 | 2016-08-17 | 中国科学院合肥物质科学研究院 | The multi-Functional Fertilizers of a kind of repairing heavy metal in soil and renovation agent |
| CN103909091A (en) * | 2014-03-31 | 2014-07-09 | 中国有色桂林矿产地质研究院有限公司 | Repairing method for heavy metal polluted soil |
| CN104560047B (en) * | 2014-12-03 | 2017-12-22 | 成都新朝阳作物科学有限公司 | Soil heavy metal passivant and application thereof |
| CN104560047A (en) * | 2014-12-03 | 2015-04-29 | 成都新朝阳作物科学有限公司 | Soil heavy mental passivator and application thereof |
| CN104745198A (en) * | 2015-02-12 | 2015-07-01 | 上海贯发海洋生物科技有限公司 | Preparation method of soil heavy metal curing detoxicant |
| CN104745198B (en) * | 2015-02-12 | 2018-03-30 | 上海贯发海洋生物科技有限公司 | Heavy metal-polluted soil solidifies the preparation method of antidote |
| CN105154092A (en) * | 2015-08-21 | 2015-12-16 | 北京雷力海洋生物新产业股份有限公司 | Soil heavy metal passivator and preparation method thereof |
| CN105154092B (en) * | 2015-08-21 | 2019-02-19 | 北京雷力海洋生物新产业股份有限公司 | A kind of soil heavy metal passivant and preparation method thereof |
| CN106001090A (en) * | 2016-06-18 | 2016-10-12 | 毛强平 | Adsorption-biological combined remediation method for heavy metal contaminated soil of mine |
| CN107512975A (en) * | 2017-08-16 | 2017-12-26 | 李建国 | Heavy-metal contaminated soil conditioner |
| CN107876551A (en) * | 2017-08-24 | 2018-04-06 | 中国科学院地理科学与资源研究所 | Eight treasures (choice ingredients of certain special dishes) red-spotted stonecrop repairs method, activator and the application of cadmium and/or lead-contaminated soil |
| CN107573197A (en) * | 2017-11-03 | 2018-01-12 | 峨眉山市瑞丰生物科技有限责任公司 | A kind of soil improvement and heavy metal repair special fertilizer |
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Application publication date: 20101215 |