CN107265808A - A kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata - Google Patents

A kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata Download PDF

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Publication number
CN107265808A
CN107265808A CN201710485887.1A CN201710485887A CN107265808A CN 107265808 A CN107265808 A CN 107265808A CN 201710485887 A CN201710485887 A CN 201710485887A CN 107265808 A CN107265808 A CN 107265808A
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China
Prior art keywords
thaliadeabata
plant
heavy metal
mud
lake
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CN201710485887.1A
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Chinese (zh)
Inventor
唐宇力
钱萍
范丽琨
张海珍
周虹
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Hangzhou West Lake Scenic Area (the Garden Of Hangzhou City Cultural Relics Bureau) Lingyin Management (hangzhou Garden)
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Hangzhou West Lake Scenic Area (the Garden Of Hangzhou City Cultural Relics Bureau) Lingyin Management (hangzhou Garden)
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Priority to CN201710485887.1A priority Critical patent/CN107265808A/en
Publication of CN107265808A publication Critical patent/CN107265808A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007Contaminated open waterways, rivers, lakes or ponds

Abstract

The present invention provides a kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata.In wetland scenic spot configuration plantation thaliadeabata, planted in spring group planting, piece in pool side, lakeside, plant division is carried out after spending will avoid plum rain season.The residual leaf of plant, averruncator excessively are gone.Planting density is 6~8 clumps/m2, 1~2 plant/clump.Earthing is compressed after plantation.Before autumn seed maturity, harvesting aerial part and cutouts underground rhizome carry out proper treatment, and next year repeats the process, can play a part of purifying water body and the pollution of bed mud heavy metal Pb.Thaliadeabata is a kind of perennial emergent aquactic plant, like warm water wet, resistance to partly cloudy, biomass is larger, it is easier to management, Post flowering ornamental value is high, therefore at wetland scenic spot, plantation thaliadeabata can not only play a part of beautifying the environment, and can also play a part of environment purification, be a kind of water body environment purification method with the very high ecological value.

Description

A kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata
Technical field
The invention belongs to environmental project, it is related to the landscape aquatic plant purification recovery technique of heavy metal polluted bed mud, specifically Ground, which is said, is related to a kind of method for utilizing heavy metal Pb in water plant thaliadeabata fixation/stabilization bottom mud in lake first.
Background technology
As Urban Water Environment heavy metal pollution turns into the worldwide environmental problem that receives much concern, such research also with Focus problem in science as home and abroad environment scientific and engineering research field and frontline technology, wherein phytoremediation technology, There is small investment due to it, treatment of the earth is not destroyed, do not cause underground water secondary pollution, in heavy metal and organic dirt Its obvious validity is had shown that in the processing for contaminating thing, it has also become it is important that soil, water environment heavy metal pollution of area source are repaired Means.
Although it has been recognized that phytoremediation low level in rehabilitating soil, water environment, water environment heavy metal It is significant in the pollution of source, but the hyperaccumulative plant screened at present is mostly weeds species, it is adaptable to mine With heavy metals in farmland pollution, be not suitable for the reparation of Urban Water Environment.Therefore a Urban Water Environment huge sum of money is carried out using aquatic plant The phytoremediation that low-level pollutes in category is with a wide range of applications.
Phytostabilization technology is many using absorption, chelating, complexing, precipitation, decomposition, the redox of certain plants etc. The process of kind, the heavy metal contaminants in soil is passivated or fixed, to reduce its biological effectiveness and migration, by its turn The friendly form of versus environmental is turned to, so as to prevent it from entering food chain and underground water, it is to avoid or pollution abatement thing to biological and The harm of environment.The main function mechanism of the technology is pH the and Eh values by changing rhizospheric environment, pollutant is accumulated in root Tired, precipitation absorbs to strengthen the solidification of heavy metal in soil.The technology has succeeded at present repaiies in land reclamation in mining area and soil pollution The plant of application has Indian mustard, rape, willow, ramie, oat, vetiver etc. in multiple, it is adaptable to which surface area is big, the soil texture The reparation of glutinous weight and the high contaminated soil of the content of organic matter.Pbs of the Cunningham etc. (1995) in research plant fixing soil When, it is found that some plants can reduce the biological effectiveness of Pb in soil, and Dushenkov etc. (1995) further study show that Pb can be combined with the phosphate of plant secretion, and the lead phosphate for forming indissoluble is fixed on plant root, so as to mitigate Pb to environment Toxic action.
Lake sediment heavy metal pollution is the mixture of the various biological corrupt bodies of S & W life in water body, is most The main matrix that number aqueous bio is depended on for existence.In recent years because urbanization and industrialization drastically develop, plurality of heavy metal pollution Thing enters water body with approach such as atmospheric sedimentation, discharge of wastewater, rainwashes, and is finally pooled in deposit.On the other hand, With the change of water body physicochemical environment, the heavy metal contaminants in deposit can also be discharged as current expand again Dissipate, therefore water body deposit is important remittance and the source of water pollutant.Aquatic plant is the important composition of wetlands ecosystems Part, China has about 250 kinds of aquatic plant, according to its life habit and form, can be divided into 3 major classes, respectively very water Plant, floating plant and submerged plant.Many kinds of aquatic plants not just ornamental plants in garden, and having to purifying water body Important function.Huang Yongjie (2006) field investigation result of study finds that the aquatic plant such as duckweed, cattail, reed is in heavy metal Potentiality of the plantation with enriching heavy metal in combined pollution waters.Wang Min etc. (2013) is to 6 kinds of water plants to heavy metal in water The research of removal effect find that to Cd clean-up effect preferably, clearance can reach more than 95% for iris, Chinese small iris and calamus; The raw canna of drought, canna glauca, cyperus alternifolius, iris, Chinese small iris, calamus reach more than 98% to Pb clearance.Wang Qianhe Result of study into level (2010) finds water lily to Cr in water body6+Clearance up to 93%.As can be seen here, aquatic plant There is critical function and potentiality in water body purification.
Thaliadeabata (ThaliadealbataFraser ex Roscae) is a kind of perennial emergent aquactic plant of Marantaceae, florescence For 4-10 months, biomass was larger, it is wet to like warm water, resistance to half the moon, and strong adaptability with good ornamental value, and is planted It is convenient to manage afterwards, without specially arranging.The present invention provides a kind of method, is repaired and is purified using conventional aquatic landscape plant Water body and bed mud, play a part of taking into account and beautify the environment and environment purification.
The content of the invention
It is an object of the invention to provide a kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata, Thaliadeabata is planted in scenic spot phytal zone, after plant growth to maturation, and plant entirety or aerial part are removed from plantation place, from And realize the purpose of purification bed mud heavy metal purification.Realized by following steps:
In wetland scenic spot phytal zone configuration plantation thaliadeabata (ThaliadealbataFraser ex Roscae), in spring Group planting, piece are planted in pool side, lakeside, and plant division is carried out after spending will avoid plum rain season.The residual leaf of plant, averruncator excessively are gone.Plant Density is 6~8 clumps/m2, 1~2 plant/clump.Earthing is compressed after plant.Before autumn seed maturity, gather in aerial part and excavate portion Divide underground rhizome, carry out proper treatment, next year repeats the process, complete purification bed mud heavy metal Pb.
Plant entirety or overground part are removed from plantation point when thaliadeabata is ripe, next year plants second batch, coordinates it Its water plant, makes the content of Pb in water body and bed mud drop to environmental safety standard.
When Pb concentration is increased to 4.71mg/kg from 0.989mg/kg in bed mud, thaliadeabata aerial part Pb concentration exists Between 0.726-1.13mg/kg, root system Pb concentration is between 0.436-1.64mg/kg, and aerial part Pb contents are 65.8-71.1 μ g Between, therefore thaliadeabata has the potentiality of Pb in enrichment and stable bed mud.
Fixed and answering in stabilizing heavy metal Pb in bottom mud in lake it is a further object to provide methods described With.It is demonstrated experimentally that using water plant thaliadeabata, chemistry that is stable and changing harmful heavy metal pollutant in soil bad border and Physical aspect, and then reduce the ability of its chemistry and bio-toxicity.Thaliadeabata is a kind of perennial herb, likes warm water wet, resistance to Half is cloudy, and biomass is larger, is easier to management;Plant type is bold tall and straight, and profile gracefulness is attractive in appearance, and it is tender beautiful that the flowers are in blossom, and ornamental value is high.Therefore At wetland scenic spot, plantation thaliadeabata can not only play a part of beautifying the environment, and can also play a part of environment purification, be one Plant the water body environment purification method with the very high ecological value.
Desilting is the important means of current river and lake environmental improvement, but either dry river (lake) asks mud still clear under water Mud, adds subsequent sludge transport and processing so that this mode cost is very high, and easily occurs secondary pollution.Except this it Outside, desilting is a kind of mode of severe jamming river course (lake) ecosystem, and the ecosystem for destroying river course (lake) is complete Property.Acted on by the fixation/stabilization of plant, reach the purpose of environment purification, with cost it is low, do not destroy soil and river ecological Environment, do not cause secondary pollution, environment has also been beautified while repairing environment.
Embodiment
The present invention is described further in conjunction with the embodiments.
Embodiment 1
In wetland scenic spot phytal zone configuration plantation thaliadeabata (ThaliadealbataFraser ex Roscae), in spring Group planting, piece are planted in pool side, lakeside, and plant division is carried out after spending will avoid plum rain season.The residual leaf of plant, averruncator excessively are gone.Plant Density is 6~8 clumps/m2, 1~2 plant/clump.Earthing is compressed after plantation.Before autumn seed maturity, gather in aerial part and excavate portion Divide underground rhizome, carry out proper treatment, next year repeats the process.
Plant entirety or overground part are removed from plantation point when thaliadeabata is ripe, next year plants second batch, coordinates it Its water plant, makes the content of Pb in water body and bed mud drop to environmental safety standard.
When Pb concentration is increased to 4.71mg/kg from 0.989mg/kg in bed mud, thaliadeabata aerial part Pb concentration exists Between 0.726-1.13mg/kg, root system Pb concentration is between 0.436-1.64mg/kg, and aerial part Pb contents are 65.8-71.1 Between μ g.Hence it is demonstrated that thaliadeabata has the potentiality of Pb in enrichment and stable bed mud.
Embodiment 2
The pollution-free soil in Xihu District is picked up from for examination soil, is sandy loam, the fine ground rear 2mm that crosses is air-dried and sieves.Artificial addition Cd is dirty Contaminate soil processing:First, caddy (top pure grade) is milled crushing respectively, is divided into parcel according to the amount of 50.0kg soil.It is required The amount of medicament wanted is calculated as follows, and the addition concentration of Pb elements is:0.00th, 50.0 and 100mg/kg dry ground;Pb in each processing Addition concentration according to (Zhang Haizhen etc., 2014) depending on the middle bottom surface source level of pollution of Cd in the soil of Westlake Scenic Spot.Secondly, adopt Heavy metal adding procedure is completed with the method progressively mixed, i.e., first takes out 0.50kg or so ready soil and the medicine weighed up Mixed in the way of sieving, then progressively add soil inward, repeatedly sieving mixing, until the mixing of 50.0kg soil is complete.Finally, The soil of well-mixed various processing is filled into basin respectively, aging 3 months or so in transparent plastic greenhouse are placed in.Basin specification For:High 25.0cm, diameter 28.0cm, soil 5.00kg are filled per basin, each 3 repetitions of processing.After aging terminates, each flowerpot takes 3 Individual pedotheque (about 50g or so altogether) forms a mixed soil sample, determines its Pb content.For trying the physicochemical property of soil such as Shown in table 1.
Table 1 is for examination soil physical chemistry property
Pot experiment:Load black plastic basin by the soil of the treated simultaneously aging of design concentration, done per the general 5.00kg of basin Weight.The roughly the same seedling of growth selection amount is transplanted into the flowerpot of each concentration for the treatment of respectively.It is each to repeat per basin final singling 2-3 Thinning amount is consistent, 3 repetitions.Experiment is carried out in transparent plastic greenhouse, is irregularly poured according to weather condition, is made soil conservation 100% water content, with not detecting heavy metal Cd in water.After after plant maturation, plant is harvested.
During harvest, above-ground plant parts and under ground portion are tapped respectively, after being rinsed well with running water, are hung in greenhouse and are dried in the air Dry surface moisture, is weighed after aerial part fresh weight, and plant each several part is placed in 75 DEG C of thermostatic drying chambers and dried to constant weight, then is weighed Dry the weight of aerial part in sample.Plant samples after drying are first blended with pulverizer, then with mixing and ball milling instrument (German Lay Speed company, MM400) clay into power, save backup, determine its Pb content.
Results from pot experiment test shows that, with the increase of Pb concentration in soil, thaliadeabata aerial part Pb concentration is not notable Change, but Pb concentration increases successively in root system.Pb contents in aerial part plant are higher, and the biomass of thaliadeabata It is larger, it is therefore contemplated that thaliadeabata has the ability (table 2) of Pb in fixed and purification bed mud.
Pb accumulates and plant Pb contents with ground portion on the ground in the pot experiment of table 2
The field test of embodiment 3:
Westlake Scenic Spot Chang Qiao parks and two, Hangzhou flower nursery park sampling point is selected to carry out field thaliadeabata planting experiment, in Spring group planting, piece are planted in pool side, lakeside, and plant division is carried out after spending will avoid plum rain season.The residual leaf of plant, averruncator excessively are gone. Planting density is 6~8 clumps/m2, 1~2 plant/clump.Earthing is compressed after plantation.After maturity period, each sampling point gathers 3 samples, point Cai Ji not thaliadeabata aerial part, root system and bed mud sample.
Post analysis process is harvested with embodiment 1.
Field result shows that Pb concentration is the 5-10 of aerial part to thaliadeabata in root system under bed mud ambient concentration Times, in bed mud Pb concentration and pot experiment to compare concentration similar, it is therefore contemplated that thaliadeabata has fixed Sediments Pb ability (table 3).
Pb concentration in thaliadeabata ground, under ground portion Pb concentration and the bed mud of the field sampling point of table 3
Conclusion:Thaliadeabata is as a kind of ornamental value is higher, biomass is larger, adaptability very strong perennial emergent aquactic plant It is widely used in Landscape Design of Wetland.The result of pot experiment and field test shows that thaliadeabata under ground portion absorbs solid The ability for determining Pb is stronger, with the ability for purifying and fixing Pb in bed mud.It therefore, it can configure certain in Landscape Design of Wetland The thaliadeabata of ratio, whole strain, which is removed, after the maturity period carries out proper treatment, and next year repeats above procedure again can play purified water The effect of heavy metal Pb in body, fixed bed mud.

Claims (5)

1. a kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata, it is characterised in that at wetland scenic spot Phytal zone configuration plantation thaliadeabata, plants in pool side, lakeside, plant division is carried out after spending will avoid plum rain season in spring group planting, piece, The residual leaf of plant, averruncator excessively are gone, earthing is compressed after plantation, before autumn seed maturity, with gathering in aerial part and cutouts Lower rhizome, carries out proper treatment, and next year repeats the process.Complete purification bed mud heavy metal Pb.
2. the method for heavy metal Pb in the solid and stable bottom mud in lake of a kind of utilization thaliadeabata according to claims 1, its It is characterised by, removes plant entirety or overground part from plantation point when thaliadeabata is ripe, next year plants second batch, coordinates it Its water plant, makes the content of Pb in water body and bed mud drop to environmental safety standard.
3. the method that heavy metal Pb in bottom mud in lake was fixed and stablized to a kind of utilization thaliadeabata according to claims 1, Characterized in that, planting density is 6~8 clumps/m2, 1~2 plant/clump.
4. the method that heavy metal Pb in bottom mud in lake was fixed and stablized to a kind of utilization thaliadeabata according to claims 1, Characterized in that, when Pb concentration is increased to 4.71mg/kg from 0.989mg/kg in bed mud, thaliadeabata aerial part Pb concentration exists Between 0.726-1.13mg/kg, root system Pb concentration is between 0.436-1.64mg/kg, and aerial part Pb contents are 65.8-71.1 μ g Between, thaliadeabata has the effect for being enriched with and fixing heavy metal Pb in bed mud.
5. application of the method according to claims 1 in bottom mud in lake in fixed and stabilizing heavy metal Pb.
CN201710485887.1A 2017-06-23 2017-06-23 A kind of method that heavy metal Pb in bottom mud in lake was fixed and stablized to utilization thaliadeabata Pending CN107265808A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107721108A (en) * 2017-11-01 2018-02-23 广州市城市规划勘测设计研究院 A kind of plant purification method of nitrogen and phosphorus in sludge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989754A (en) * 2012-12-20 2013-03-27 江苏省中国科学院植物研究所 Method for enhanced remediation of copper contaminated soil by using iris in combination with cutting measure
CN104128362A (en) * 2014-07-14 2014-11-05 华南农业大学 Method for restoring cadmium polluted soil by Thalia dealbata
CN105060637A (en) * 2015-08-08 2015-11-18 郑州大学 Method for constructing ecological purification system for substrate sludge-water polluted type shallow-narrow river

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989754A (en) * 2012-12-20 2013-03-27 江苏省中国科学院植物研究所 Method for enhanced remediation of copper contaminated soil by using iris in combination with cutting measure
CN104128362A (en) * 2014-07-14 2014-11-05 华南农业大学 Method for restoring cadmium polluted soil by Thalia dealbata
CN105060637A (en) * 2015-08-08 2015-11-18 郑州大学 Method for constructing ecological purification system for substrate sludge-water polluted type shallow-narrow river

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107721108A (en) * 2017-11-01 2018-02-23 广州市城市规划勘测设计研究院 A kind of plant purification method of nitrogen and phosphorus in sludge

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