CN104445627B - Lake endogenesis control brick and use method thereof - Google Patents
Lake endogenesis control brick and use method thereof Download PDFInfo
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- CN104445627B CN104445627B CN201410705452.XA CN201410705452A CN104445627B CN 104445627 B CN104445627 B CN 104445627B CN 201410705452 A CN201410705452 A CN 201410705452A CN 104445627 B CN104445627 B CN 104445627B
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- brick body
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- bed mud
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention provides a lake endogenesis control brick and a use method thereof. The brick is prepared by steps as follows: (1), bottom sediment of a lake is taken, and content of iron and phosphorus in the bottom sediment is measured; (2), iron salt is added to the bottom sediment and mixed; (3), a mixture obtained from step (2) is air-dried, and a green brick is prepared from the mixture when the moisture content is 50 wt%-60 wt% after air-drying; (4), the green brick is dried in the shade for 2-3 days and then sintered; (5), a plurality of planting holes are punched in the sintered brick; and (6), submerged plants are planted in the planting holes, and the lake endogenesis control brick is obtained. After the lake endogenesis control brick is placed in the lake, the shearing force of bottom water and disturbance of water flowing to sediment can be reduced, so that release of nutrient salt suspended on the sediment is reduced, the chemical property of the sediment-water interface can be effectively improved by adjusting iron-phosphorus ratio of the sediment water interface, stability of phosphorus in the sediment is improved, and the planting and amplification capability of the submerged plants is enhanced.
Description
Technical field
The invention belongs to water environment pollution control field, be specifically related to one can utilize biology, physics and
Chemical technology controls endogenous control material and the using method thereof of deposit endogenous nitrogen Phosphurus release.
Background technology
Lake eutrophication be outside Now Domestic pay close attention to important environmental problem, eutrophication be mainly because of
The a series of ecological environment problems brought for water nutrition is superfluous, deposit be the source of nutritive salt also
Being the remittance of nutritive salt, after external source is effectively controlled, deposit internal loading is to affect water body in lake battalion
Support the key factor of salinity.
Lake endogenous control method of the prior art be mainly the bed mud in lake carried out desilting or
It is to utilize aquatile that the pollutant in water body are enriched with and are shifted, but both all exists engineering
Amount is big, invest problem excessive, that labour cost is high.In order to solve this technical problem, Chinese patent literary composition
Offering CN101412547A and disclose a kind of mineral composite for eliminating lake endogenous pollution, this is multiple
Condensation material is with the natural gypsum, anhydrite or the industrial residue based on Gypsum Fibrosum and limonite ore or sulphuric acid
Slag or hematite ore or the iron content material higher than 20% are raw material, through dispensing, mixing, powder
Grinding, in wherein said compound, the mol ratio of S: Fe is 20: 1-1: 3.This mineral composite makes
Used time is according to 50-1000g/m by described powder body2It is added in water, molten in water body of this composite
Phosphorus decomposing has certain adsorption, the suspended state colloidal solid in water, microorganism are had certain absorption,
Strengthening sedimentation function, thus promote that the phosphorus in water body migrates from bed mud and is passivated.
Although the absorption of phosphorus phase in the use beneficially water body of above-mentioned mineral composite of the prior art
And sedimentation, but it still has problems in that, the contaminant transportation in bed mud and Lake Water interface is easy
Being affected by water disturbance, when water disturbance, above-mentioned phosphorus phase transition process of the prior art also can
Destroyed, cause phosphorus to be difficult to mutually normally settle, or be also susceptible to back-mixing after sedimentation, thus affected
The removal efficiency of pollutant.And this mineral composite add can introduce in lake substantial amounts of external
Material, thus produce new ecological environment problem.
Summary of the invention
The technical problem to be solved in the present invention is for eliminating the compound of lake endogenous pollution in prior art
The contaminant removal efficiency that material exists is low and can introduce the problem of a large amount of foreign substance, and then provides one
Low cost, contaminant removal efficiency are high, be conducive to restored ecosystem and will not produce new foreign substance
Lake endogenous control brick body and using method.
The present invention solves the technical scheme of above-mentioned technical problem employing:
A kind of lake endogenous control brick body, is prepared from by following steps:
(1) take the bed mud in lake, the content of the ferrum in bed mud and phosphorus is measured；
(2) in described bed mud, iron salt and mix homogeneously, the ferrum in described iron salt and described bed mud are added
In the molal quantity sum of ferrum be (6-8) with the ratio of the molal quantity of the phosphorus in described bed mud: 1；
(3) mixture of step (2) is carried out dry in the sun, when dry in the sun to moisture content is 50-60wt%
Described mixture is made adobe, a length of 13-15cm of described adobe, a width of 9-11cm, a height of
2.5-3.5cm；
(4) calcining after described adobe being dried in the shade 2-3 days, calcining heat is 850-950 DEG C；
(5) upper surface of the brick body prepared in calcining gets multiple implantation hole, each described implantation hole
Aperture is 1.5-3cm；
(6) in each described implantation hole, plant submerged plant, brick body is placed on nursery pond
In, cultivate 3-7 days and i.e. obtain described lake endogenous control brick body.
Described iron salt is one or more in ferric nitrate, ferric citrate or ferric oxalate.
The content of organic matter in described bed mud is 160-180g/kg.
Moisture content after adobe is dried in the shade 2-3 days described in step (4) is 18-22wt%.
Described in step (4), the time of calcining is 2.5-3.5 hour.
Described in step (4), the temperature of calcining is 900 DEG C.
Described submerged plant is one or more in Herba vallisneriae Spiralis, hornwort, watermifoil or black algae.
In step (6), after brick body is placed on nursery pond, in described nursery pond, add nitrification
Antibacterial and denitrifying bacteria.
The using method of described lake endogenous control brick body, including: by described lake endogenous control brick body
It is laid on the bed mud of lake region.
The depth of water of described lake region is 2-5 rice, and the laying area of described lake endogenous control brick body accounts for institute
State the 20-30% of lake region area.
Described lake endogenous control brick body in use, is spread by lake endogenous control brick body of the present invention
It is located on the bed mud of lake region, when laying, the bottom surface of brick body is contacted with bed mud, is placed on
On described bed mud；Wherein said " lake region " refers to need internal loading in lake, especially
It it is the region that is controlled of the internal loading of phosphorus；In view of the submerged plant requirement to growing environment, this Shen
In please, the depth of water of preferred described lake region be 2-5 rice.In order to reach to control the effect of internal loading, with
Time also reduce manufacture and lay cost, the laying area of the preferred described lake endogenous control brick body of the present invention accounts for
The 20-30% of described lake region area.
Lake endogenous control brick body of the present invention has the advantage that
(1) lake endogenous control brick body of the present invention, uses the end mud as a raw material in lake, passes through
Dry in the sun, base, calcining make organic burning the in bed mud lose, and change the mineral structure of Sediments,
Create substantial amounts of micropore, it is possible to the nutrient substance such as the nitrogen phosphorus in active adsorption water body simultaneously.By this
After bright described lake endogenous control brick body puts into lake, it is possible to decrease bottom water body answer shear force and water body stream
The dynamic disturbance to deposit, thus reduce the Nutrient release of sediment resuspension.Brick body is placed deposition
After thing-water termination, it is possible to change mud-water termination ferrum phosphorus ratio and Redox Condition, and control ferrum/
The mol ratio of phosphorus reaches 6-8: 1, to be effectively improved the chemical property of mud-water termination, and enhanced deposition thing phosphorus
Stability, reduce Phosphorus in Lake Sediment internal loading amount.Meanwhile, the application is heavy by brick body plantation
Water plant, beneficially raising submerged plant is at deposit surface colonization ability, due to the Stabilization of brick body
Enhance the rate of amplification of submerged plant, thus repair lake ecosystem, beneficially the nutritive salt such as nitrogen phosphorus
Benign cycle in lake ecosystem.
Additionally, it can be also zoobenthos and micro-that lake endogenous control brick body of the present invention puts into behind lake
The biological place of living away from home that provides, so not only had amplification lake submerged plant through water effect but also have amplification microorganism and
The biological agent of zoobenthos.
(2) lake endogenous control brick body of the present invention, limits described iron salt as ferric nitrate, Fructus Citri Limoniae
Acid ferrum or ferric oxalate in one or more, its reason is that above-mentioned iron salt can after high-temperature roasting
Its acid ion is burnt and loses, because of without introducing new impurity in Water Environment In Lakes.
(3) lake endogenous control brick body of the present invention, in described implantation hole, in plantation, heavy water is planted
Thing, is placed on brick body in nursery pond, and adds nitrobacteria and denitrification in described nursery pond
After antibacterial culturing 3-7 days again by described lake endogenous control spreading bricks on the bed mud of lake region.Logical
Cross this setup, the brick body surface attachment prepared can be made to have nitrobacteria and denitrifying bacteria, it is possible to
Effectively facilitate lake sediment and water body nitrogen to convert to gaseous nitrogen, thus reduce the internal loading of deposit nitrogen
Concentration with Water.
Accompanying drawing explanation
The temperature of the micro-wave digestion program that Fig. 1 is used by experimental example 3-digestion time figure.
Detailed description of the invention
The described lake endogenous control brick body present invention provided below in conjunction with embodiment and using method thereof
It is described in further details.
Embodiment 1
Lake endogenous control brick body described in the present embodiment, is prepared from by following methods:
(1) taking the bed mud in Lake Erhai, employing SMT method records the phosphorus content in bed mud and is
800mg/Kg, using micro-wave digestion ICP-OES method to record the iron content in bed mud is 90mg/Kg；
(2) in described bed mud, add ferric nitrate and mix homogeneously so that the ferrum in described ferric nitrate with
The molal quantity sum of the ferrum in described bed mud is 6: 1 with the ratio of the molal quantity of the phosphorus in described bed mud；
(3) mixture of step (2) is carried out dry in the sun, when dry in the sun to moisture content is 50wt% by institute
State mixture and make adobe, a length of 15cm of described adobe, a width of 9cm, a height of 3.5cm；
(4) calcining 2.5 hours after described adobe being dried in the shade 2 days, calcining heat is 950 DEG C；After drying in the shade
Moisture content be 18wt%；
(5) upper surface of the brick body prepared after firing gets 6 implantation hole, each described implantation hole
Aperture be 1.5cm；
(6) in each described implantation hole, plant 3 watermifoils, brick body is placed on nursery pond
In, cultivate and within 3 days, i.e. obtain described lake endogenous control brick body.
The using method of lake endogenous control brick body described in the present embodiment, including:
Described lake endogenous control spreading bricks to Erhai is needed on the bed mud of lake region of improvement, institute
The depth of water stating lake region is 2-3m.When laying, the laying area of described lake endogenous control brick body
Account for the 20% of described lake region area.
Embodiment 2
Lake endogenous control brick body described in the present embodiment, is prepared from by following methods:
(1) taking the bed mud in Erhai, employing SMT method records the phosphorus content in bed mud and is
1200mg/Kg, using micro-wave digestion ICP-OES method to record the iron content in bed mud is 60mg/Kg；
(2) in described bed mud, add ferric oxalate and mix homogeneously so that the ferrum in described ferric oxalate with
The molal quantity sum of the ferrum in described bed mud is 8: 1 with the ratio of the molal quantity of the phosphorus in described bed mud；
(3) mixture of step (2) is carried out dry in the sun, when dry in the sun to moisture content is 55wt% by institute
State mixture and make adobe, a length of 14cm of described adobe, a width of 11cm, a height of 3cm；
(4) calcining 2.5 hours after described adobe being dried in the shade 3 days, calcining heat is 900 DEG C；After drying in the shade
Moisture content be 22wt%；
(5) upper surface of the brick body prepared after firing gets 4 implantation hole, each described implantation hole
Aperture be 3cm；
(6) in each described implantation hole, plant 1 Herba vallisneriae Spiralis, brick body be placed in nursery pond,
Cultivate and within 3 days, i.e. obtain described lake endogenous control brick body.
The using method of lake endogenous control brick body described in the present embodiment, including:
Described lake endogenous control spreading bricks to Erhai is needed on the bed mud of lake region of improvement, institute
The depth of water stating lake region is 3-5m；When laying, the laying area of described lake endogenous control brick body
Account for the 30% of described lake region area.
Embodiment 3
Lake endogenous control brick body described in the present embodiment, is prepared from by following methods:
(1) taking the bed mud in Erhai, using SMT method to record the phosphorus content in bed mud is 800mg/Kg,
Using micro-wave digestion ICP-OES method to record the iron content in bed mud is 30mg/Kg；
(2) in described bed mud, ferric citrate and mix homogeneously are added so that in described ferric citrate
Ferrum and the molal quantity sum of the ferrum in described bed mud are 7: 1 with the ratio of the molal quantity of the phosphorus in described bed mud；
(3) mixture of step (2) is carried out dry in the sun, when dry in the sun to moisture content is 60wt% by institute
State mixture and make adobe, a length of 13cm of described adobe, a width of 10cm, a height of 2.5cm；
(4) calcining 3 hours after described adobe being dried in the shade 2.5 days, calcining heat is 850 DEG C；After drying in the shade
Moisture content be 20wt%；
(5) upper surface preparing brick body after firing gets 5 implantation hole, each described implantation hole
Aperture is 2.2cm.
(6) in each described implantation hole, plant 3 hornworts, brick body is placed on nursery pond
In, in nursery pond, add nitrobacteria and denitrifying bacteria, cultivate and within 7 days, i.e. obtain described lake endogenous control
Brickmaking body.
The using method of lake endogenous control brick body described in the present embodiment, including:
Described lake endogenous control spreading bricks to Erhai is needed on the bed mud of lake region of improvement, institute
The depth of water stating lake region is 3-4m；When laying, the laying area of described lake endogenous control brick body
Account for the 25% of described lake region area.
The present embodiment is by adding nitrobacteria and denitrifying bacteria, it is possible to effectively facilitate the purification of water body,
Wherein said nitrobacteria and denitrifying bacteria can be any existing commercially available strain.As the most real
Execute mode, described nitrobacteria and the denitrifying bacteria dosage in nursery pond and water body in nursery pond
Volume ratio is respectively 1011-1013Individual/L.
Comparative example
Lake endogenous control brick body described in this comparative example, is prepared from by following methods:
(1) taking the bed mud in Lake Erhai, employing SMT method records the phosphorus content in bed mud and is
800mg/Kg, using micro-wave digestion ICP-OES method to record the iron content in bed mud is 90mg/Kg；
(2) mixture of step (1) is carried out dry in the sun, when dry in the sun to moisture content is 50wt% by institute
State mixture and make adobe, a length of 15cm of described adobe, a width of 9cm, a height of 3.5cm；
(3) calcining 2.5 hours after described adobe being dried in the shade 2 days, calcining heat is 950 DEG C；After drying in the shade
Moisture content be 18wt%；
(4) upper surface of the brick body prepared after firing gets 6 implantation hole, each described implantation hole
Aperture be 1.5cm；
(5) in each described implantation hole, 3 watermifoils in the same manner as in Example 1 are planted, by institute
State brick body to be placed in nursery pond, cultivate and within 3 days, i.e. obtain described lake endogenous control brick body.
Experimental example 1
The bottom mud in lake sediment-water analog 1～5# that this experimental example uses, is the circle of upper opening
Staving, a diameter of 25cm of described cylinder body.It is equipped with 10cm in the bottom of described analog 1～5#
Pick up from the bed mud in Erhai, inject the distilled water of 200mL on the top of described bed mud.By above-described embodiment
The described lake endogenous control brick body that 1-3 prepares is laid in 1～3# analog respectively, will contrast
The brick body that example prepares is laid in 4# analog.This experimental example is additionally provided with blank assay, i.e. exists
Any brick body is not placed in bottom mud in lake sediment-water analog 5#.
Above-mentioned analog 1～5# is placed 7 days in the isoperibol of 25 DEG C, and the 1st, 4,7
It time the phosphorus content in water in above-mentioned analog 1～5# is detected, result is as shown in table 1:
Phosphorus content (mg/L) in water in table 1 analog 1～5#
| 1st day | 4th day | 7th day | |
| 1# | 0.045 | 0.032 | 0.025 |
| 2# | 0.045 | 0.034 | 0.024 |
| 3# | 0.045 | 0.034 | 0.025 |
| 4# | 0.045 | 0.046 | 0.048 |
| 5# | 0.046 | 0.047 | 0.060 |
As it can be seen from table 1 compared with the phosphorus content in water in the analog 5# not placing brick body, this
Invention by bottom mud in lake being made lake endogenous control brick body, it is possible in active adsorption water body by lake
The P elements of sediment release, and the present invention is further by adding ferrum element in bed mud, can make to fire
Containing the ferrum of Optimum Contents in the brick body obtained, this is conducive to stablizing of the phosphorus strengthening absorption on brick body surface
Property, the phosphorus content in water body not only can be made to gradually decrease, the most amplifiable submerged plant, optimize lake ecological
System, thus reduce the purpose of the internal loading amount of lake sediment nitrogen phosphorus.
Experimental example 2: use SMT method to measure the phosphorus content in bed mud
2.1 experimental apparatus
Analytical balance (precision to 0.0001g), ultraviolet spectrophotometer, Muffle furnace, baking oven, exsiccator,
Centrifuge, constant-temperature table.
2.2 experiment reagent
(1)5mol·L-1H2SO4Solution: 70mL concentrated sulphuric acid is dissolved in 500mL water and get final product,
Preserve under room temperature.
(2) antimony tartrate potassium solution: accurately weigh 1.3715g antimony potassium tartrate (C8H4K2O12Sb2)
Constant volume in 500mL volumetric flask, is stored in this solution in brown reagent bottle after fully shaking up, is placed in
Preserve at 4 DEG C.
(3) ammonium molybdate solution: accurately weigh 40.0000g ammonium molybdate (H8MoN2O4) in 1000mL
Constant volume in volumetric flask, is stored in this solution in brown reagent bottle after fully shaking up, be placed in refrigerator in
Preserve at 4 DEG C.
(4) ascorbic acid solution: accurately weigh 17.6000g ascorbic acid (C6H8O6) in 1000mL
Constant volume in volumetric flask, is stored in this solution in brown reagent bottle after fully shaking up, be placed in refrigerator in
Preserve at 4 DEG C.
(5) phosphate stock solution: by top grade pure phosphoric acid potassium dihydrogen (KH2PO4) be dried in 110 DEG C
2h, accurately weighs 0.2197g and is dissolved in water, be transferred in 1000mL volumetric flask, add dense sulfur after letting cool
Acid 2.5mL is also settled to graticule, and being i.e. configured to phosphorus concentration is 50ug mL-1Solution.
(6) phosphate standard solution: draw 10.0mL phosphate stock solution in 25mL volumetric flask,
Being diluted with water to graticule, being i.e. configured to phosphorus concentration is 2ug mL-1Solution.Matching while using.
(7)3.5mol·L-1HCl solution: take 294mL hydrochloric acid in 1000mL volumetric flask with graduated cylinder
In, dilute, after it cools down, it is diluted to graticule；Then proceeded to vial preserves.
(8) developer: developer is by volumes below proportional arrangement:
5mol·L-1H2SO solution: antimony tartrate potassium solution: ammonium molybdate solution: ascorbic acid solution
=10: 1: 3: 6；100mL developer to be joined need to take 5mol L-1H2SO4Solution 50mL, winestone
Acid antimony potassium solution 5mL, ammonium molybdate solution 15mL, ascorbic acid solution 30mL, after mixing and get final product,
Developer at most can only preserve 4h.
2.3 operating procedure
2.3.1 the drafting of calibration curve
Take 7 color-comparison tubes, be separately added into phosphate standard solution 0,0.25,0.5,1.5,2.5,
5,7.5mL, and add water to 50mL.In color comparison tube, add 8mL developer more fully mix, place
10min.Use 10mm cuvette, at 880nm wavelength, with pure water as reference, measure absorbance；
Standard curve is made with absorbance and phosphorus concentration.
2.3.2 sample determination
(1) weigh the dry sample of 0.2g bed mud to be measured in porcelain crucible, at temperature is 450 DEG C, is ashed 3h
(when temperature is raised to 450 DEG C, i.e. starting timing, be ashed 3 hours).
(2) move it in centrifuge tube after cooling, add 3.5mol L-1HCl solution 20mL,
Being placed in shaking table concussion 16h, wherein shaking table temperature is 25 °, and rotating speed is 200rpm.
(3) after sample concussion 16h, under rotating speed is 5000rpm, centrifugal 15min makes solid-liquid separation.
(4) in color comparison tube and constant volume is to 50mL to pipette 2mL supernatant with pipet, adds colour developing
Agent 8mL, after colour developing 10min, colorimetric under wavelength 880nm.
2.4 experimental result
1. the absorbance that test obtained substitutes into formula, can obtain specific absorbance value, and then calculates and treat
Survey the phosphorus concentration in bed mud；Again 2. the phosphorus concentration value in bed mud to be measured is substituted into formula, to be calculated bed mud
In phosphorus content:
A=abc formula is 1.
Formula 1. in, a is specific absorbance, unit L/ (g cm)；B is that the distance of light process in the sample is (logical
It is often the thickness of cuvette), unit cm；C is the concentration of detected solution, unit g/L；A is absorbance.
Phosphorus content (mg kg-1)=(ultimate density × 20)/bed mud to be measured dry sample quality formula 2.
Formula 2. in, phosphorus concentration × 25 in ultimate density=bed mud to be measured.
Experimental example 3: use micro-wave digestion ICP-OES method to measure the iron content in bed mud
3.1 instrument
Analytical balance (precision 0.0001g), airtight microwave digestion instrument, inductively coupled plasma atom are sent out
Penetrate spectrogrph, fume hood, politef counteracting tank, baking oven, constant temperature oscillator.
3.2 reagent
Concentrated nitric acid；Concentrated hydrochloric acid；The standard pure iron storing solution being made up of straight iron powder.
3.3 operating procedure
3.3.1 the drafting of standard curve
By 1000mg L-1Standard pure iron storing solution be diluted to 0.25 respectively, 1.0, the standard of 5.0mg/L
Solution, the standard solution 1mL taking above-mentioned three kinds of concentration is placed in three counteracting tanks and is separately added into 4mL
Concentrated nitric acid and 12mL concentrated hydrochloric acid；The most separately take a counteracting tank and add 1mL ultra-pure water, 4mL concentrated nitric acid
With 12mL concentrated hydrochloric acid, as blank sample, as doing with above-mentioned three counteracting tanks clear up process after, profit
With ICP-OES Instrument measuring iron content, make standard curve with the intensity of spectral line and concentration of iron.
3.3.2 sample determination
(1) accurately weigh the bed mud sample (105 DEG C of dry 2h) that 1.0000g is dried, be placed in polytetrafluoro
In ethylene counteracting tank, be sequentially added into 4mL nitric acid, the shaking of 12mL hydrochloric acid is allowed to be sufficiently mixed with sample,
The question responses such as placement are complete, screw counteracting tank cover.
(2) counteracting tank is put into Mars-Xpress type microwave dissolver furnace chamber, according to EPA-3051
Set microwave digestion temperature-temporal sequence as it is shown in figure 1, by starting microwave oven switch, press and run simultaneously
Clear up program key, proceed by Specimen eliminating.
(3) after micro-wave digestion completes, instrument can perform cooling program automatically, after 10min cooling,
Take out counteracting tank, open counteracting tank cover after cooling 5～10min, more carefully open inner cap.
(4) respectively with each 1～2mL the bowl cover of ultrapure water pressure and wall of cup 2～3 times, take out
Filter, the ultrapure water bottle,suction with 1～2mL 2 times, and filtrate is transferred to 25mL color comparison tube
In, then to go ultra-pure water to be settled to 100mL, treat that ICP-OES analyzes.
(5) confirm that instrument has enough argon after work, start preheating 1.5h, then opens argon
Controlled atmosphere joint dividing potential drop is 0.6MPa purging 45min, starts computer control software, treats that light room temperature is constant
After, open air draft and recirculated water, make CID temperature be down to less than-40 DEG C, install peristaltic pump folder,
Sample feeding pipe is put into igniting after in ultra-pure water and excites plasma, can enter after plasma stability
Sample operates.Instrumental Analysis operating condition is as follows:
RF generator power 1100W；Three layers of concentric detachable quartz torch pipe；High-purity argon gas (purity
>=99.99%) as working gas；Cooling gas flow 12L/min；Secondary air amount secondary air amount 0.5
L/min；Integration number of repetition is 3 times.
3.4 experimental result
The line wavelength of the feature line-spectra of ferrum element is 238.204nm, this wavelength test obtained
The intensity of spectral line value substitute into formula 1., the concentration of iron in bed mud to be measured can be obtained；Again by bed mud to be measured
2. concentration of iron value substitutes into formula, the iron content to be calculated in bed mud:
LgI=blgc+lga formula is 1.
Formula 1. in, I is the intensity of spectral line, and b is self-priming coefficient, and c is the concentration of iron (mg/kg) in bed mud to be measured,
A is constant.
The dry sample quality formula of iron content (mg/Kg)=(concentration of iron × extension rate in bed mud to be measured)/bed mud is 2.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment
Restriction.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-form.Here without also all of embodiment being given thoroughly
Lift.And the obvious change thus extended out or variation are still in the protection domain of the invention
Among.
Claims (10)
1. a lake endogenous control brick body, is prepared from by following steps:
(1) take the bed mud in lake, the content of the ferrum in bed mud and phosphorus is measured；
(2) add in iron salt mix homogeneously, the ferrum in described iron salt and described bed mud in described bed mud
The molal quantity sum of ferrum be (6-8) with the ratio of the molal quantity of the phosphorus in described bed mud: 1；
(3) mixture of step (2) is carried out dry in the sun, when dry in the sun to moisture content is 50-60wt% by institute
State mixture and make adobe, a length of 13-15cm of described adobe, a width of 9-11cm, a height of 2.5-3.5cm；
(4) calcining after described adobe being dried in the shade 2-3 days, calcining heat is 850-950 DEG C；
(5) upper surface of the brick body prepared in calcining gets multiple implantation hole, the hole of each described implantation hole
Footpath is 1.5-3cm；
(6) in each described implantation hole, plant submerged plant, brick body be placed in nursery pond,
Cultivate 3-7 days and i.e. obtain described lake endogenous control brick body.
Lake endogenous control brick body the most according to claim 1, it is characterised in that described iron salt
For one or more in ferric nitrate, ferric citrate or ferric oxalate.
Lake endogenous control brick body the most according to claim 1 and 2, it is characterised in that described
The content of organic matter in bed mud is 160-180g/kg.
Lake endogenous control brick body the most according to claim 1, it is characterised in that in step (4)
Moisture content after described adobe is dried in the shade 2-3 days is 18-22wt%.
Lake endogenous control brick body the most according to claim 1, it is characterised in that in step (4)
The time of described calcining is 2.5-3.5 hour.
6. according to the lake endogenous control brick body described in claim 1,2,4 or 5, it is characterised in that
Described in step (4), the temperature of calcining is 900 DEG C.
Lake endogenous control brick body the most according to claim 1, it is characterised in that described heavy water is planted
Thing is one or more in Herba vallisneriae Spiralis, hornwort, watermifoil or black algae.
8., according to the lake endogenous control brick body described in claim 1,2,4,5 or 7, its feature exists
In, in step (6), after brick body is placed on nursery pond, in described nursery pond, add nitrification thin
Bacterium and denitrifying bacteria.
9. the using method of the lake endogenous control brick body described in any one of claim 1-8, including: will
Described lake endogenous control spreading bricks is on the bed mud of lake region.
Using method the most according to claim 9, it is characterised in that the water of described lake region
Deep is 2-5 rice, and the area of laying of described lake endogenous control brick body accounts for described lake region area
20-30%.
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| CN104891742A (en) * | 2015-06-03 | 2015-09-09 | 广州贝山环保科技有限公司 | Ecological-chemical method for controlling release of shallow-water deposit phosphorus and application |
| CN105800792B (en) * | 2016-05-27 | 2018-08-31 | 惠州市环境科学研究所 | Water remediation method |
| CN106006977B (en) * | 2016-05-27 | 2019-01-01 | 惠州市环境科学研究所 | Water remediation method |
| CN106311129B (en) * | 2016-08-31 | 2018-11-02 | 中国环境科学研究院 | A kind of preparation method of the efficient material removal of sediment interstitial water phosphate and application |
| CN109502765A (en) * | 2018-12-31 | 2019-03-22 | 盐城工学院 | A kind of probiotics and preparation method thereof for hybridized prussian carp water improvement |
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| KR20050043856A (en) * | 2005-04-19 | 2005-05-11 | (주)토목기술엔지니어링 | Water cleaning apparatus using plant |
| CN203072490U (en) * | 2013-03-08 | 2013-07-24 | 昆山瀚潮环保科技有限公司 | Multifunctional dense type lotus floating bed |
| CN104108915A (en) * | 2014-07-09 | 2014-10-22 | 上海理工大学 | Sintering-free method for preparing bricks from dredged sediment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050043856A (en) * | 2005-04-19 | 2005-05-11 | (주)토목기술엔지니어링 | Water cleaning apparatus using plant |
| CN203072490U (en) * | 2013-03-08 | 2013-07-24 | 昆山瀚潮环保科技有限公司 | Multifunctional dense type lotus floating bed |
| CN104108915A (en) * | 2014-07-09 | 2014-10-22 | 上海理工大学 | Sintering-free method for preparing bricks from dredged sediment |
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