CN1268558C - Method for governing arsenic contamination in soil and water body - Google Patents
Method for governing arsenic contamination in soil and water body Download PDFInfo
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- CN1268558C CN1268558C CN 200410051874 CN200410051874A CN1268558C CN 1268558 C CN1268558 C CN 1268558C CN 200410051874 CN200410051874 CN 200410051874 CN 200410051874 A CN200410051874 A CN 200410051874A CN 1268558 C CN1268558 C CN 1268558C
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- 239000002689 soil Substances 0.000 title claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 49
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011109 contamination Methods 0.000 title claims description 17
- 238000003306 harvesting Methods 0.000 claims abstract description 12
- 239000000284 extract Substances 0.000 claims abstract description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 39
- 241000196324 Embryophyta Species 0.000 claims description 11
- 230000006872 improvement Effects 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 6
- 230000012010 growth Effects 0.000 claims description 6
- 238000009395 breeding Methods 0.000 claims description 4
- 230000001488 breeding effect Effects 0.000 claims description 4
- 239000003337 fertilizer Substances 0.000 claims description 4
- 230000004763 spore germination Effects 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 2
- GJRGEVKCJPPZIT-UHFFFAOYSA-N isomugineic acid Natural products OC(=O)C(O)CCNC(C(O)=O)C(O)CN1CCC1C(O)=O GJRGEVKCJPPZIT-UHFFFAOYSA-N 0.000 claims description 2
- GJRGEVKCJPPZIT-JBDRJPRFSA-N mugineic acid Chemical compound OC(=O)[C@@H](O)CCN[C@H](C(O)=O)[C@@H](O)CN1CC[C@H]1C(O)=O GJRGEVKCJPPZIT-JBDRJPRFSA-N 0.000 claims description 2
- 230000021332 multicellular organism growth Effects 0.000 claims description 2
- 241000691155 Pteris multifida Species 0.000 abstract description 6
- 239000002028 Biomass Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000000419 plant extract Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 238000002513 implantation Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000737257 Pteris <genus> Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019219 chocolate Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 210000001990 heterocyst Anatomy 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000002703 mutagenesis Methods 0.000 description 1
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- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
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Landscapes
- Processing Of Solid Wastes (AREA)
- Cultivation Of Plants (AREA)
Abstract
The present invention discloses a method for treating arsenic pollution in soil and water bodies. The present invention mainly utilizes a fern, namely pteris multifida, with the function of arsenic superconcentration to absorb and activate the arsenic in the polluted soil or the polluted water bodies, simultaneously, the arsenic is upward transported and transferred to an overground part, after the overground part forms certain biomass, the overground part of the pteris multifida is periodically harvested, the underground part of the pteris multifida is reserved, and the stalks of the overground part is reserved for 3cm to 5cm when in harvest so as to continuously extract. The present invention establishes a mode of continuous extraction, and can continuously transfer a great amount of arsenic in the polluted soil or the polluted water bodies until the arsenic content in the soil or the water bodies reaches the standards of environment safety.
Description
Technical field
The present invention relates to the environmental pollution field, specifically a kind of method of administering soil and water body arsenic contamination.
Background technology
According to estimates, the whole world is annual artificially to reach 28400-94000t to the As of soil discharging amount, and arsenic and compound thereof are well-known " three cause material ", i.e. teratogenesis, carcinogenic and mutagenesis.Therefore, the improvement of As polluted soil and water body arouses extensive attention at home and abroad day by day.
There is abundant arsenic minerals resource in China, owing to be rich in the natural weathering and the mining activities such as corresponding strip mining transformation, smelting of arsenic minerals body, and the use of a large amount of metallurgical addition agents, Insecticides (tech) ﹠ Herbicides (tech) and chemical fertilizer etc., cause China's big area soil and water body arsenic contamination, mine and smeltery's perimeter strip are particularly serious, and the arsenic of excessive exposure directly threatens human settlement and food safety.
Current, can mainly contain physics and chemistry repairing method and biological restoration method for the method for administering soil or heavy metal pollution of water body.
The physics and chemistry repairing method is if any soil moved in to improve the original (soil removal and replacement) method, the precipitator method, drip-rinsing process, electrochemical process, magnetization method etc.These physics or chemical process respectively have its advantage, and cost is high, quantities more greatly, easily causes secondary pollution problems but all exist.
Biological process has two kinds of microorganism and plant restoration methods.The local success that microorganism is repaired only is confined to the degraded of some organic pollutants, handling metal pollutant, is not effective especially in soil.Phytoremediation (phytoremediation) is the green recovery technique of a kind of emerging heavy metal contamination original position (in situ), plant extract technology (phytoextraction) as one of its core technology, develop into the research and application focus of environmental science, and caused the great attention of government, academia and business circles.
From current domestic and international plant extract technical study and practice progress, remaining is also needing to solve following problem: the research of (1) arsenic super enriching plant (hyperaccumulator) is ground zero, and the plant variety of alternative energy (surpassing) enrichment arsenic is less; (2) super enriching plant of recommended preferential use, general biomass is on the low side, and the overall removal efficient of heavy metal is lower, also has problems such as strange land acclimatization simultaneously; (3) bioavailability of heavy metals (bioavailability) has much room for improvement in the contaminated soil; (4) from should being used for, the phytoremediation technology of developed country part has dropped into practical application, and has obtained environment, economic and social benefit preferably, and China still is in the starting stage, and correlation technique also is in laboratory or pilot scale stage.
Summary of the invention
The objective of the invention is provides a kind of method of administering soil or water body arsenic contamination at present soil and the serious problem of water body arsenic contamination.The present invention utilizes curb limit grass (Pterismultifida), arsenic in continuous extraction and activating soil or the water body, upwards transportation and transhipment arrive overground part simultaneously, treat that overground part forms certain biomass, the periodical reaping overground part, the preserve bottom then can be extracted continuously, shift a large amount of arsenic in soil or the water body continuously, thereby remove soil or water body arsenic contamination through certain extracting cycle.
The arsenic hyperaccumulation plant curb limit grass (Pteris multifida) that the present invention is used is in Guangdong Double Ninth Festival, Nandan, Guangxi and Binyang arsenic minerals district self-sow, more distribution.The taxonomy feature of this plant is as follows:
(1) be Pteridaceae Pteris plant, root stock is short and upright, and thick 1～1.5 centimetre, tip is bored the shape scale by chocolate;
(2) Ye Erxing, majority, close and cluster, herbaceous stem does not have hair; Petiole straw look or band brown; The fertile frond length of a film is avette, and is long 20～45 centimetres, wide 15～25 centimetres, pinniform, but the bottom accessory pinna has the handle except that base portion is a pair of often two to trident, other each to the base portion lower edge, form narrow wing in the rachis both sides;
(3) accessory pinna or pinnule bar shaped, wide 3～7 centimetres, the top is point gradually, and is sterile, and serrulation is arranged, and is downwards full edge; The accessory pinna of sterile frond or pinnule broad, edge have irregular sharp sawtooth.All swell on the master pulse two sides, the straw look, and lateral vein is obvious, and is sparse, and single or bifurcated has the stria parallel with lateral vein (veiny heterocyst) more or less sometimes between lateral vein.
(4) sorus is along the limb continuous distribution.
Technical scheme of the present invention comprises:
1. control soil or water body pH to be administered is weakly alkaline;
2. curb limit grass is implanted soil or water body to be administered;
3. gather in the overground part of curb limit grass.
Soil that above-mentioned control is to be administered or water body pH are weakly alkaline; The actual potential of hydrogen of visible growth medium is regulated by mugineic acid or alkaline fertilizer (or lime).
Above-mentioned with curb limit grass implantation soil or water body to be administered; To curb limit grass being treated to that water body growth is supported: curb limit grass is implanted floating bed, and root directly contact with polluted-water by the aperture that bores system on the floating bed, grows to add sponge or absorbent cotton firm plant in aperture in earlier stage.
The overground part of above-mentioned harvesting curb limit grass, harvesting 3～5 centimetres of toothings during overground part, harvesting twice in a year in the soil, harvesting in a year is three times in the water body, or gathers in once during to 60～70 cm heights when curb limit grass is long.The overground part of harvesting can be unified to handle, as in security landfill of garbage loading embeading district or burning.Allow curb limit grass continuous growth, gather in its overground part continuously, reach safety standards up to soil or water body arsenic content.
Soil that above-mentioned implantation is to be administered or the curb limit grass in the water body are: direct transplanting wild or by spore germination, the careless seedling in greenhouse cultivation curb limit grows to the curb limit grass in 10～15 centimetres or 3～4 weeks of growing.
Above-mentioned spore germination breeding condition is: with the ripe spore of curb limit grass, evenly be sowed at and sieve and steam on the leaf-humidified soil of frying, attention is preserved moisture and is put shady place, and daytime, temperature was 20～25 ℃, and night, temperature was 10～15 ℃, atmospheric moisture 60～80%.
The breeding condition of above-mentioned greenhouse cultivation curb limit grass seedling is: daytime, temperature was 20～25 ℃, and night, temperature was 10～15 ℃, atmospheric moisture 60～80%.
The used curb of the present invention limit grass (Pteris multifida), its enrichment characteristics to arsenic is as follows under the natural condition:
Meadow, curb limit upper blade, petiole and rhizomatic average arsenic content are respectively 1977 ± 782,633 ± 291 and 1103 ± 656mg/kg (dry weight).
Beneficial effect of the present invention:
1. the arsenic super enriching plant curb limit grass that uses of the present invention is applied to the plant extract of contaminated soil or water body arsenic, and cost is low, the remediation efficiency height, and potential economic benefit is considerable;
2. the curb limit grass that uses of the present invention, well developed root system, it is vigorous grow, breeds easily, is suitable for the plant extract of As polluted soil or water body;
3. the present invention has set up the continuous extraction pattern of a cover, has simplified the program of rehabilitating soil or water body arsenic contamination, is suitable for applying;
4. the reparation pattern of the present invention's foundation is green original position reparation, the overground part of being gathered in the crops is concentrated security landfill or burning, can not cause secondary pollution, repair process simultaneously and can not destroy soil or water ecological setting, and help to improve soil and descend because of Soil degradation and the productivity that heavy metal contamination causes, recover also to improve the soil organisms diversity, can obviously improve water quality the reparation of water body.
Embodiment
Embodiment 1: soil remediation
The open-air curb limit grass seedling of transplanting is cultivated in the normal soil in greenhouse, relative air humidity 60～80%, daytime, temperature was 20～25 ℃, night, temperature was 10～15 ℃, treated growth of seedling to 6～10 centimetre to be transplanted into heavy-metal contaminated soil, for examination arsenic in soil content is 300mg/kg, liming is regulated pH to 7～8,15 centimetres of line-spacings, 10 centimetres of spacing in the rows.Grow and gathered in the crops overground part, 4～5 centimetres of toothings in 3 months.The curb limit grass that gather in the crops the first time, overground part arsenic content is all greater than 1000mg/kg (dry weight) after measured; Curb limit grass continuous growth, extract arsenic in soil continuously, gather in its overground part continuously, the arsenic content in the soil constantly reduces, until normal level.
Embodiment 2: the water body reparation
With the ripe spore of curb limit grass, evenly be sowed at and sieve and steam on the leaf-humidified soil of frying, to preserve moisture and put shady place, daytime, temperature was 20～25 ℃, and night, temperature was 10～15 ℃, and atmospheric moisture 60～80% grew sporophyll in about two months.Then curb limit grass seedling is cultivated in the normal soil in greenhouse, culture condition is the same.Treat growth of seedling to 5～10 centimetre to be transplanted into the floating bed that is provided with arsenic polluted water body, root directly contact with polluted-water by bore the aperture of system on floating bed, grows to add sponge firm plant in aperture in earlier stage; Water body arsenic background content: 5～80mg/L transfers pH to weakly alkaline.Results overground part after 3 weeks of growth, 3～4 centimetres of toothings.After measured, the curb limit blade of grass sheet of results and root arsenic content are respectively 375～2916,137～1497mg/kg (dry weight), and control group blade and root arsenic content only are 91 and 5mg/kg (dry weight).Curb limit grass extracts arsenic continuously, gathers in its overground part continuously, and the arsenic content in the water body constantly reduces, until normal level.
Claims (7)
1, a kind of method of administering soil or water body arsenic contamination is characterized in that utilizing the continuous arsenic that extracts in soil or the water body of curb limit grass.
2, the method for improvement soil as claimed in claim 1 or water body arsenic contamination is characterized in that the described continuous arsenic that extracts in soil or the water body of curb limit grass that utilizes, and specifically comprises the steps:
(1) control soil or water body pH to be administered is weakly alkaline;
(2) curb limit grass is implanted soil or water body to be administered;
(3) overground part of harvesting curb limit grass.
3, the method for improvement soil as claimed in claim 2 or water body arsenic contamination is characterized in that the described continuous arsenic that extracts in soil or the water body of curb limit grass that utilizes, and specifically comprises the steps:
(1) be weakly alkaline by mugineic acid fertilizer or alkaline fertilizer control soil or water body to be administered;
(2) curb limit grass is implanted in the soil or water body to be administered, to curb limit grass being treated to that water body growth is supported: curb limit grass is implanted floating bed, root directly contacts with polluted-water by the aperture that bores system on the floating bed, and growth adds sponge or absorbent cotton firm plant in aperture in earlier stage;
(3) overground part of harvesting curb limit grass, toothing is 3～5 centimetres during the harvesting overground part, harvesting twice in a year in the soil, harvesting in a year is three times in the water body, or gathers in once during to 60～70 cm heights when curb limit grass is long.
4, the method for improvement soil as claimed in claim 3 or water body arsenic contamination, it is characterized in that the described curb of step (2) limit grass is: direct transplanting wild or by spore germination, grass seedling in greenhouse cultivation curb limit grows to the curb limit grass in 10～15 centimetres or 3～4 weeks of growing.
5, the method for improvement soil as claimed in claim 3 or water body arsenic contamination is characterized in that strange land security landfill of top, meadow, curb limit or burning with step (3) harvesting gained.
6, the method for improvement soil as claimed in claim 4 or water body arsenic contamination, the breeding condition that it is characterized in that described spore germination is: with the ripe spore of curb limit grass, evenly be sowed at and sieve and steam on the leaf-humidified soil of frying, note preserving moisture and putting shady place, daytime, temperature was 20～25 ℃, night, temperature was 10～15 ℃, atmospheric moisture 60～80%.
7, the method for improvement soil as claimed in claim 4 or water body arsenic contamination, it is characterized in that the breeding condition of described greenhouse cultivation curb limit grass seedling is: daytime, temperature was 20～25 ℃, and night, temperature was 10～15 ℃, atmospheric moisture 60～80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051874 CN1268558C (en) | 2004-10-20 | 2004-10-20 | Method for governing arsenic contamination in soil and water body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051874 CN1268558C (en) | 2004-10-20 | 2004-10-20 | Method for governing arsenic contamination in soil and water body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600707A CN1600707A (en) | 2005-03-30 |
| CN1268558C true CN1268558C (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051874 Expired - Fee Related CN1268558C (en) | 2004-10-20 | 2004-10-20 | Method for governing arsenic contamination in soil and water body |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974599A (en) * | 2012-11-05 | 2013-03-20 | 溧阳市天目湖保健品有限公司 | Bioremediation method of iron ore tailing |
| CN102974598A (en) * | 2012-11-05 | 2013-03-20 | 溧阳市天目湖保健品有限公司 | Bioremediation method of lead zinc ore flotation tailing |
| CN106613160A (en) * | 2016-11-23 | 2017-05-10 | 云南云投生态环境科技股份有限公司 | Spore breeding method for arsenic hyperaccumulator Pteris cretica |
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- 2004-10-20 CN CN 200410051874 patent/CN1268558C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1600707A (en) | 2005-03-30 |
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