CN101096033A - Method for restoring cadmium polluted soil by using amaranth - Google Patents

Method for restoring cadmium polluted soil by using amaranth Download PDF

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Publication number
CN101096033A
CN101096033A CNA200710028302XA CN200710028302A CN101096033A CN 101096033 A CN101096033 A CN 101096033A CN A200710028302X A CNA200710028302X A CN A200710028302XA CN 200710028302 A CN200710028302 A CN 200710028302A CN 101096033 A CN101096033 A CN 101096033A
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CN
China
Prior art keywords
soil
cadmium
coloured amaranth
amaranth
content
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Pending
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CNA200710028302XA
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Chinese (zh)
Inventor
杨中艺
周轶慧
王俊丽
袁剑刚
薛梦
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Sun Yat Sen University
National Sun Yat-sen University
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National Sun Yat-sen University
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Priority to CNA200710028302XA priority Critical patent/CN101096033A/en
Publication of CN101096033A publication Critical patent/CN101096033A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method of repairing pollution soil by amaranth. As amaranth is planted in soil polluted by cadmium amaranth root adsorbs cadmium from pollution soil in large amount and amaranth is transferred to stem and leaf of cadmium so on. When the plant grows to flower period or mature period the upper part plant is transferred away from pollution soil so as to realize the purpose that cadmium is removed from pollution soil.

Description

Utilize the method for three-coloured amaranth cadmium pollution soil repair
Technical field
The present invention relates to cadmium pollution improvement technology, specifically, relate to the method for utilizing the three-coloured amaranth cadmium pollution soil repair.
Background technology
Along with rapid economy development, the increase of human industrial and agricultural production activity, the heavy metal pollution of soil problem is on the rise.Sewage irrigation, mud are used, are contained the heavy metal dusts atmospheric sedimentation, contain the use of heavy metal agricultural chemicals, farmland periphery mining and smelting activity etc. are to cause China's agricultural land soil to suffer the main cause of heavy metal pollution.
At present, the suburbs, the most of city of China soil all has been subjected to heavy metal pollution in various degree.According to interrelated data, whole nation industry " three wastes " polluted agricultural land 266.7 ten thousand hm in 1980 2, be increased to 666.7 ten thousand hm in 1988 2, and the national farmland area that suffers to pollute in various degree in 1992 has reached 1,000 ten thousand hm 2Dirty 45% soil of irritating the gross area of China is polluted at present.Open the scholar irrigated area as the Shenyang City and make 2533hm because of the dirt filling 2The farmland suffers Cd to pollute (soil Cd content 〉=1.0mg kg -1), wherein the severe contamination area (may produce Cd content 〉=1.0mg kg -1The farmland of rice) account for 13%; The dirty Cd contaminated area that causes of irritating in Dayu County, Jiangxi reaches 5500hm 2, wherein the severe contamination area accounts for 12%.Heavy metal pollution has constituted great threat to the ecological safety and the food security of China so on a large scale, China has the grain content of beary metal of 1,000 ten thousand t to exceed standard every year approximately, the grain yield of losing because of soil pollution also reaches 1,000 ten thousand t, and direct economic loss reaches more than 100 hundred million yuan.The annual Cd that the produces agricultural product that exceed standard reach 14.6 hundred million kg.Pollution of agricultural products causes heavy metal to enter human body by food chain, and for example, majority state on average absorbs Cd 30-60 μ g everyone every day, wherein more than 60% from food.Heavy metal pollution causes serious threat to human health.Cd poisons common illness to human body has the lung obstacle sick and renal function is bad, takes in micro-Cd for a long time, also can cause Itai-itai diseases by the accumulation in the organ-tissue, and basin, Japanese magic river is because the Itai-itai diseases that the Cd pollution causes are known to all.
The restorative procedure of administering heavy metal pollution of soil at present mainly contains: chemosetting method, soil elution method, electronic repairing method and phytoremediation technology.First three methods and phytoremediation technology are compared and can find, it is too high that first three methods has cost of investment, can only be used for polluting very common drawback such as serious place, and complex operation, even need destroy soil layer construction sometimes, is difficult to scale and uses.And phytoremediation technology have the investment and maintenance cost low, easy and simple to handle, do not cause secondary pollution, have potential or show characteristics such as economic benefit, also have simultaneously physics, chemical repair method incomparable expense cheap, not the damage field ground structure, beautify the environment, easily advantage such as accepted by society, development prospect is very wide.
At present, phytoremediation mainly is meant plant extraction, and studying maximum is the extraction repair of using super enriching plant.Super enriching plant is meant that mainly those have the plant that extremely strong absorption and accumulation ability and itself can not be subjected to its murder by poisoning to heavy metal.To the discovery of such plant and to its absorb, the research of enrichment mechanism, be the prerequisite and the basis of using on the phytoremediation technology engineering.The notion of hyperaccumulative plant is that Brook (1995) etc. puts forward, it is generally acknowledged that content of beary metal surpasses 100 times of common plant and belongs to hyperaccumulative plant, the content that is cadmium should be more than 100mg/kg, the content of cobalt, nickel, copper, lead should be more than 1000mg/kg, and manganese, zinc content should be more than 10000mg/kg.At present the cadmium super enriching plant kind of finding seldom, wherein sky blue brown blue dish (Thlaspi caerulescens) can enrichment 2130mg kg -1, but still there is the shortcoming that biomass is little, the speed of growth is slow in actual applications in this plant.
Summary of the invention
The object of the present invention is to provide a kind of biomass big, administer the fireballing method of utilizing the super enriching plant three-coloured amaranth to come cadmium pollution soil repair.
To achieve these goals, the present invention adopts following technical scheme:
The present invention is by planting three-coloured amaranth in being subjected to the soil of cadmium pollution, absorb cadmium in the contaminated soil in a large number by the three-coloured amaranth root system, and cadmium is transferred to the overground part organ such as stem, leaf of three-coloured amaranth, when plant grows to anthesis or maturity period, whole strain of plant or overground part are removed from contaminated soil, thereby realized removing cadmium pollutant in the contaminated soil.
In order thoroughly to remove the cadmium that exceeds standard in the soil, can adopt the mode of multiple cropping, promptly during to florescence or maturity period, plant integral body is removed from contaminated soil in first three-coloured amaranth length, plant second batch again, repeat said process.Harmless treatment is carried out with the method for burning in the harvesting back.
In order to improve three-coloured amaranth the upperground part biomass, thereby improve recovery rate, can before the plantation three-coloured amaranth, in soil, apply base manure, and topdress in growth course to cadmium in the contaminated soil.
Compared with prior art, the present invention has following beneficial effect: the present inventor finds that through long term studies three-coloured amaranth is a kind of cadmium super enriching plant, and its growth is rapid, and environmental suitability is strong.Three-coloured amaranth is planted in the soil that is subjected to cadmium pollution, can absorbs cadmium in the soil, permanently solve the Cadmium Pollution in Soils problem.This improvement method expense is cheap, workable, do not destroy the ambient soil structure, do not cause secondary pollution.
The specific embodiment
Embodiment 1: three-coloured amaranth is 7.68mg kg at cadmium content -1Soil in to the absorption characteristic of Cd
This test is carried out at Guangdong Province's Qingyuan City, and the soil cadmium content is 7.68mg kg -1Implantation time is in May, 2004.The three-coloured amaranth seed is broadcast in the trial zone soil, and every square metre keeps 80 strains during final singling.Regularly water according to growth needs, grow and take a sample after 40 days.
Result of the test shows, is 7.68mg kg at cadmium content -1Trial zone soil in, the average cadmium content of three-coloured amaranth overground part reaches 115.7-141.8mg kg -1, mean value reaches 128.7mgkg -1, reached the critical content standard that the cadmium super enriching plant should reach, promptly the overground part cadmium content is greater than 100mg kg -1, and the overground part cadmium content is the 158-226% of underground part cadmium content.Therefore, from the characteristic of accumulation of three-coloured amaranth to cadmium, meeting the essential characteristic of cadmium super enriching plant fully, is the super enriching plant of cadmium.
Embodiment 2: using three-coloured amaranth is 10.25mg kg to cadmium content -1Soil carry out biological restoration
This test is carried out in Heshan City, Guangdong Province, and the control soil cadmium content is 0.12mg kg -1, test soil cadmium content is 10.25mg kg -1Implantation time is in July, 2006.The three-coloured amaranth seed is broadcast in contrast and the test soil, converted 120 every square metre.Thinning after 10 days, every square metre keeps 100 strains.Final singling after 20 days, every square metre keeps 80 strains.Regularly water according to growth needs, grow and take a sample after 42 days.
Result of the test shows, is 10.25mg kg at cadmium content -1Test soil in, three-coloured amaranth overground part cadmium content reaches 101.45-114.72mg kg -1, mean value reaches 106.55mg kg -1, reached the critical content standard that the cadmium super enriching plant should reach, promptly the overground part cadmium content is greater than 100mg kg -1The average biomass of three-coloured amaranth overground part reaches 1.11kg m -2, comparison shows the patience to heavy metal cadmium according to having improved 7.26%.In addition, the cadmium concentration coefficient of three-coloured amaranth is respectively 10.40, and the overground part cadmium content is 174.% of a underground part cadmium content.The result shows that three-coloured amaranth also meets the essential characteristic of cadmium super enriching plant fully in this test to the characteristic of accumulation of cadmium.
Behind the plantation 42d, in mean value, the quantity of the Cd that three-coloured amaranth extracts from soil reaches 118.27mg m -2, be that 20cm, the soil weight are 1.4g cm with contaminated soil thickness -3Calculate, remove cadmium in the growth Ji Kecong soil and reach 0.422mg kg -1, the clearance of Cd is 4.12% in the soil, to calculate in 1 year 4 growth season, the clearance of Cd can reach 15.49% in the soil.Concrete computing formula is:
Y=10.25×[(1-4.12%) 4] x
Wherein, after Y represents to plant three-coloured amaranth, the Cd content in the soil;
X represents the three-coloured amaranth plantation time.
Therefore, use three-coloured amaranth can be in 14 years be 10.25mg kg with Cd content -1Soil (20cm is thick) in cadmium be reduced to 0.97mg kg -1Level, reach the cadmium threshold limit value (Cd≤1.0mgkg of " national soil environment quality standard (GB 156182-1995) " III class soil -1); In 21 years cadmium content in the soil is reduced to 0.29mg kg -1, reach the soil cadmium content threshold limit value (Cd≤0.3mg kg of " food agricultural produce home environment criteria of quality evaluation (HJ332-2006) " -1).

Claims (4)

1. a method of utilizing the three-coloured amaranth cadmium pollution soil repair is characterized in that planting three-coloured amaranth in being subjected to the soil of cadmium pollution.
2. the method for claim 1 is characterized in that applying base manure in soil, and topdressing in growth course before the plantation three-coloured amaranth.
3. method as claimed in claim 1 or 2 is characterized in that harvesting when three-coloured amaranth is bloomed or be ripe, plants the next group three-coloured amaranth again, until thoroughly removing the cadmium that exceeds standard in the soil.
4. method as claimed in claim 3 is characterized in that adopting the method for burning to carry out harmless treatment harvested three-coloured amaranth.
CNA200710028302XA 2007-05-29 2007-05-29 Method for restoring cadmium polluted soil by using amaranth Pending CN101096033A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101850359A (en) * 2010-06-18 2010-10-06 中山大学 Method for remediating lead-contaminated soil or water
CN101905237A (en) * 2010-07-27 2010-12-08 西南科技大学 Method for restoring and treating caesium and/or strontium polluted soil by using red spinach
CN101941018A (en) * 2010-08-09 2011-01-12 农业部环境保护科研监测所 Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed
CN102114490A (en) * 2011-03-04 2011-07-06 中国科学院华南植物园 Phytoremediation method for cadmium polluted farmland
CN102553902A (en) * 2011-04-29 2012-07-11 四川农业大学 Method for applying paddy rice in repairing soil contaminated by heavy metal cadmium
CN102989752A (en) * 2012-12-04 2013-03-27 常州大学 Method for assisting vegetable crops to restore Cd-Cu-Pb composite contaminated soil by EDTA (Ethylene Diamine Tetraacetic Acid)
CN101724405B (en) * 2009-11-02 2013-04-17 中山大学 Soil conditioner for reducing cadmium and lead pollution to crop
CN103894400A (en) * 2014-04-15 2014-07-02 西南科技大学 Method for promoting enrichment of cadmium of red spinach by using plant growth regulator
CN103909088A (en) * 2014-04-17 2014-07-09 常州大学 Technique for reducing content of cadmium and lead in soil
CN103962367A (en) * 2014-04-15 2014-08-06 西南科技大学 Method for promoting enrichment of cadmium by red spinach through composition of plant hormone and chelating agent
CN104128362A (en) * 2014-07-14 2014-11-05 华南农业大学 Method for restoring cadmium polluted soil by Thalia dealbata
CN104475437A (en) * 2014-12-04 2015-04-01 辽宁石油化工大学 Application of melastoma dodecandrum in remediation of lead-polluted soil
CN105964669A (en) * 2016-07-15 2016-09-28 河南师范大学 Method for remedying cadmium-polluted soil by using cadmium hyperaccumulation plant chenopodium serotinum
CN107052035A (en) * 2017-06-15 2017-08-18 湖南农业大学 A kind of ecological restoring method of heavy-metal contaminated soil
CN107081335A (en) * 2017-06-15 2017-08-22 湖南农业大学 A kind of ecological restoring method of heavy metal pollution agricultural land soil
CN107185959A (en) * 2017-06-15 2017-09-22 湖南农业大学 A kind of method by planting three-coloured amaranth reduction soil heavy metal cadmium
CN107889840A (en) * 2017-11-15 2018-04-10 陕西理工大学 A kind of hardening agent for strengthening super enriching plant cadmium pollution soil repair and its application
CN110064647A (en) * 2019-06-05 2019-07-30 湖南双晟科技信息咨询有限公司 A kind of processing method of cadmium pollution soil

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101724405B (en) * 2009-11-02 2013-04-17 中山大学 Soil conditioner for reducing cadmium and lead pollution to crop
CN101850359A (en) * 2010-06-18 2010-10-06 中山大学 Method for remediating lead-contaminated soil or water
CN101850359B (en) * 2010-06-18 2012-11-14 中山大学 Method for remediating lead-contaminated soil or water
CN101905237A (en) * 2010-07-27 2010-12-08 西南科技大学 Method for restoring and treating caesium and/or strontium polluted soil by using red spinach
CN101941018A (en) * 2010-08-09 2011-01-12 农业部环境保护科研监测所 Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed
CN102114490A (en) * 2011-03-04 2011-07-06 中国科学院华南植物园 Phytoremediation method for cadmium polluted farmland
CN102553902A (en) * 2011-04-29 2012-07-11 四川农业大学 Method for applying paddy rice in repairing soil contaminated by heavy metal cadmium
CN102989752A (en) * 2012-12-04 2013-03-27 常州大学 Method for assisting vegetable crops to restore Cd-Cu-Pb composite contaminated soil by EDTA (Ethylene Diamine Tetraacetic Acid)
CN103894400A (en) * 2014-04-15 2014-07-02 西南科技大学 Method for promoting enrichment of cadmium of red spinach by using plant growth regulator
CN103962367A (en) * 2014-04-15 2014-08-06 西南科技大学 Method for promoting enrichment of cadmium by red spinach through composition of plant hormone and chelating agent
CN103909088A (en) * 2014-04-17 2014-07-09 常州大学 Technique for reducing content of cadmium and lead in soil
CN104128362A (en) * 2014-07-14 2014-11-05 华南农业大学 Method for restoring cadmium polluted soil by Thalia dealbata
CN104475437A (en) * 2014-12-04 2015-04-01 辽宁石油化工大学 Application of melastoma dodecandrum in remediation of lead-polluted soil
CN105964669A (en) * 2016-07-15 2016-09-28 河南师范大学 Method for remedying cadmium-polluted soil by using cadmium hyperaccumulation plant chenopodium serotinum
CN107052035A (en) * 2017-06-15 2017-08-18 湖南农业大学 A kind of ecological restoring method of heavy-metal contaminated soil
CN107081335A (en) * 2017-06-15 2017-08-22 湖南农业大学 A kind of ecological restoring method of heavy metal pollution agricultural land soil
CN107185959A (en) * 2017-06-15 2017-09-22 湖南农业大学 A kind of method by planting three-coloured amaranth reduction soil heavy metal cadmium
CN107889840A (en) * 2017-11-15 2018-04-10 陕西理工大学 A kind of hardening agent for strengthening super enriching plant cadmium pollution soil repair and its application
CN107889840B (en) * 2017-11-15 2020-06-16 陕西理工大学 Enhancer for enhancing hyperaccumulation plants to restore cadmium-contaminated soil and application thereof
CN110064647A (en) * 2019-06-05 2019-07-30 湖南双晟科技信息咨询有限公司 A kind of processing method of cadmium pollution soil

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Application publication date: 20080102