CN1246421C - Mixed additive for improving restoring effect of plant polluted with soil zinc cadmium and its application - Google Patents
Mixed additive for improving restoring effect of plant polluted with soil zinc cadmium and its application Download PDFInfo
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- CN1246421C CN1246421C CN 03140098 CN03140098A CN1246421C CN 1246421 C CN1246421 C CN 1246421C CN 03140098 CN03140098 CN 03140098 CN 03140098 A CN03140098 A CN 03140098A CN 1246421 C CN1246421 C CN 1246421C
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention relates to the preparation of an additive for treating soil pollution. The additive is formed by the mixture of citric acid, gourmet powder waste liquid, ethylene diamine tetraacetic acid (EDTA) and KCL in the molar concentration proportion that citric acid to gourmet powder waste liquid to EDTA to KCL is 9 to 11: 0.5 to 1.5: 1 to 3: 2 to 4. The additive is applied to super-enrichment plants which are planted on heavy metal polluted soil by the proportion of 2 to 10 mmol of the additive for one kilogram of earth. The plant restoring efficiency of the additive is enhanced by 10 to 50%, and the plant restoring effect of the additive is not worse than that of EDTA. The present invention has the advantages of low price, low phytotoxicity and little pollution to underground water.
Description
Technical field
The present invention relates to administer the technology of preparing of the additive of soil pollution.
Technical background
Heavy metal pollution of soil adopts phytoremediation technology to compare with traditional physics, chemical engineering technology, possess skills and double dominant economically, be mainly reflected in the following aspects: 1) pollutent is removed in the original place, can be by traditional agriculture measure plantation plant, thereby cost significantly reduces, and can from the plant residue that is rich in metal that produces, reclaim noble metal, obtain direct economic benefit; 2) plant itself is to the purification and the beautification function of environment, easilier accepted by society; 3) the phytoremediation process also is the process that soil organic matter content and soil fertility increase, and the soil that was repaired generally is fit to the growth of farm crop.
Business-like phytoremediation wishes that (1-3) reduces concentration of metal in a rational time range.Reach this target, the biomass that we just need to adopt zinc that a kind of overground part can enrichment about 1% and annual overground part is 20 tons/hectare a plant.General super enriching plant does not have so big biomass, and because the bioavailability of heavy metals in the soil is low, has influenced repairing effect.Reason is that the activity of heavy metal in soil is very low, if add sequestrant in heavy-metal contaminated soil, just might obtain the desired concentration of phytoremediation commercialization.The existing effective sequestrant of using is EDTA.But EDTA price height, it is slower to degrade, and can cause groundwater pollution.
Technology contents
The purpose of this invention is to provide a kind of lowlyer, and can promote plant-growth, remove the effective additive of heavy metal-polluted soil phytoremediation than EDTA price.
This additive is by citric acid, for analyzing or chemical pure; Monosodium glutamate waste liquid is the industrial effluent through regulating, and concentration of sodium glutamate is 0.8mol/L, pH=6.3; B diammonium disodium edta salt (EDTA) is for analyzing or chemical pure; KCL is chemical pure or industrial goods, and being mixed forms, and its proportioning by the mole densitometer is: citric acid: monosodium glutamate waste liquid: EDTA: KCL=9-11: 0.5-1.5: 1-3: 2-4.Application concentration is: 1-5mmol/L, and usage quantity is a 2-10mmol/kg soil; Application process is divided 2 times, for the first time in plant preceding 4 weeks of results, in plant preceding 2 weeks of results, sprays with atomizer for the second time.
Advantage of the present invention has: (1) price is lower; (2) cause phreatic of reduced contamination; (3) improve phytoremediation efficient and reach 10-50%; (4) phytotoxicity is low.
This Application of Additives example has:
The volumetric molar concentration proportioning is: citric acid: monosodium glutamate waste liquid: EDTA: KCL=10: 1: 2: 3, amount of application was 2 and 6mmol/kg soil; Every basin is equipped with contaminated soil 1kg, and potted plant super enriching plant-penny cress or Sedum alfredii Hance are gathered in the crops preceding 4 weeks and used for the first time, and the plant results are used in preceding 2 weeks for the second time; The absorbed dose of plant is measured in the results back, compares with the contrast of not using additive, improves remediation efficiency average out to 20%, and effect is better than EDTA, specifically sees Table 1.
Table 1 mixed additive is to the relative raising ratio of heavy metal contamination soil phyto remediation efficiency
| Plant and metal species | Additive-free (contrast) | EDTA | Mixed additive (consumption 1) | Mixed additive (consumption 2) |
| Penny cress-Zn | 1.00 | 1.06 | 1.23 | 1.56 |
| Sedum alfredii Hance-Zn | 1.00 | 1.36 | 0.95 | 1.10 |
| Penny cress-Cd | 1.00 | 0.83 | 1.06 | 1.08 |
| Sedum alfredii Hance-Cd | 1.00 | 0.91 | 1.10 | 1.06 |
| On average | 1.00 | 1.04 | 1.09 | 1.20 |
This mixed additive shows that through the plant seed germination experiment phytotoxicity is starkly lower than common organic acid and monosodium glutamate waste liquid.The soil percolation experiment shows that the leaching loss amount of heavy metal-polluted soil and nitrogen phosphorus nutrition element is lower than EDTA, and is therefore little to phreatic pollution.
Claims (2)
1, improves the additive of zinc in soil, cadmium pollution phytoremediation efficient, it is characterized in that being made up of citric acid, monosodium glutamate waste liquid, b diammonium disodium edta salt, KCL, proportioning by the mole densitometer is: citric acid: monosodium glutamate waste liquid: b diammonium disodium edta salt: KCL=9-11: 0.5-1.5: 1-3: 2-4.
2, according to the Application of Additives of the said raising zinc in soil of claim 1, cadmium pollution phytoremediation efficient, it is characterized in that application concentration is 1-5mmol/L, usage quantity is a 2-10mmol/kg soil, application process is divided 2 times, for the first time in plant preceding 4 weeks of results, in plant preceding 2 weeks of results, spray for the second time with atomizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03140098 CN1246421C (en) | 2003-08-07 | 2003-08-07 | Mixed additive for improving restoring effect of plant polluted with soil zinc cadmium and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03140098 CN1246421C (en) | 2003-08-07 | 2003-08-07 | Mixed additive for improving restoring effect of plant polluted with soil zinc cadmium and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1513946A CN1513946A (en) | 2004-07-21 |
| CN1246421C true CN1246421C (en) | 2006-03-22 |
Family
ID=34240236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03140098 Expired - Fee Related CN1246421C (en) | 2003-08-07 | 2003-08-07 | Mixed additive for improving restoring effect of plant polluted with soil zinc cadmium and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1246421C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371092C (en) * | 2004-07-16 | 2008-02-27 | 中国科学院沈阳应用生态研究所 | Method for repairing Cd contaminated soil by using Cruciferae plant |
| CN100371093C (en) * | 2004-07-23 | 2008-02-27 | 中国科学院沈阳应用生态研究所 | Method for repairing soil of cadmium polluted by solanaceae plant |
| CN102826925B (en) * | 2012-08-30 | 2014-06-18 | 中国农业大学 | Rhizosphere regulating agent for promoting cadmium-contaminated soil phytoremediation and application method thereof |
| CN106085444A (en) * | 2016-06-06 | 2016-11-09 | 佛山市聚成生化技术研发有限公司 | The preparation method of a kind of soil improvement chelating agen reducing Lead In Soil content and prepared soil improvement chelating agen |
| CN109772865A (en) * | 2018-12-25 | 2019-05-21 | 桂林理工大学 | A kind of method that organic acid Fertilizers improve hyperaccumulative plant feather cockscomb remediation efficiency |
| CN114798713A (en) * | 2022-04-13 | 2022-07-29 | 生态环境部华南环境科学研究所 | Chelating agent and method for strengthening rhodiola southeast to restore cadmium-polluted vegetable field by using same |
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2003
- 2003-08-07 CN CN 03140098 patent/CN1246421C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1513946A (en) | 2004-07-21 |
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