CN103361072A - Cadmium pollution bioremediation agent as well as preparation method and application thereof - Google Patents

Cadmium pollution bioremediation agent as well as preparation method and application thereof Download PDF

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CN103361072A
CN103361072A CN201310289456XA CN201310289456A CN103361072A CN 103361072 A CN103361072 A CN 103361072A CN 201310289456X A CN201310289456X A CN 201310289456XA CN 201310289456 A CN201310289456 A CN 201310289456A CN 103361072 A CN103361072 A CN 103361072A
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cadmium
rhzomorph
cadmium pollution
bioremediation agents
core
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CN103361072B (en
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唐八生
曹典军
郭帅
蔡浩
侯亚卓
周艳
周利群
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Taigu Biotechnology Group Co ltd
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HUNAN TAIGU BIOTECHNOLOGY CO Ltd
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Abstract

The invention provides a cadmium pollution bioremediation agent which is composed of the following ingredients in parts by weight: 10-20 parts of core rhzomorph, 10-20 parts of a nutritional ingredient, 2-6 parts of an enzyme activity substance and 54-78 parts of an rhzomorph carrier. The invention further provides an application of the cadmium pollution bioremediation agent. The cadmium pollution bioremediation agent is reasonable in microorganism specie collocation and high in comprehensive function. Microorganisms in the core rhzomorph can be planted and grow in soil rapidly to form strong bacterial colonies, and heavy metal ions, namely, cadmium Cd<+1> can be directly absorbed to microbial cell walls or into cells to be cured and passivated. Besides, bacillus cereus and beer yeast in the composition have high absorption and passivation function on heavy metal ions, namely, cadmium Cd<+1>, chromium Cr<+1> and lead Pb<+1>, due to the high comprehensive function, the mobility of the heavy metal ions, namely, cadmium Cd<+1>, is reduced, and the purpose of reducing absorption of crops on the heavy metal ions is achieved.

Description

Cadmium pollution bioremediation agents and its preparation method and application
Technical field
The invention belongs to agriculture microbe application field, be specifically related to bioremediation agents that contains active bacterium and its preparation method and application.
Background technology
Along with industrialization and intensive agriculture expanding economy, China's arable land Heavy Metal Pollution is more and more serious.Early 1990s, China's cadmium pollution cultivated area reaches 1.3 * 104/hm 2, relate to 25 areas of 11 provinces and cities.Show according to Hunan Province's heavy metal contamination ad hoc survey and agricultural environment quality monitoring result in recent years, oneself accounts for 23.7 of the whole province total cultivated area the contaminated cultivated area in Hunan Province, about 27% farmland irrigating water and about 25% farmland atmosphere have been subject to pollution in various degree in addition, and principal pollutant are the heavy metal elements such as cadmium, lead.For example zhuzhou, hunan province city in January, 2006, the cadmium pollution event that the Singapore and Malaysia village reverberates throughout the nation has 2 people dead because of unknown cause, and 150 villagers are judged as the chronic mild cadmium poisoning through health check-up; The heavy metal wastewater thereby that other has thousands of mu of soils, village such as new bridge, Xia Wan and construction of being positioned at edge, Xia Wan manufacturing district just to be discharged by the Xia Wan manufacturing district before the eighties in last century pollutes.Local government provides the subsidy of 800 jin of rice every year to every mu of rice field, provided more than 20 year.Paddy rice accumulates the absorption of cadmium on the heavy-metal contaminated soil in order to reduce, and has mainly studied at present dual mode both at home and abroad: the one, the cadmium in the soil is converted into the indissoluble attitude, and namely the activated state cadmium in the soil is passivated, thereby makes crop be difficult to absorb; The 2nd, cadmium is removed from soil, namely utilize engineering or biological method cadmium pollution soil repair.To repair required fund larger because of engineering for the latter, is difficult to carry out spread.Therefore, research how to reduce with the passivation fixing soil in the method for the heavy metals such as cadmium, be of great immediate significance.Lay the foundation for rationally instructing the rice cadmium pollution to subdue, the great special project of Hunan Province in 2012 science and technology " the rice cadmium pollution is subdued and Fast Detection Technique is studied with equipment " starts in the Changsha, Hunan.Special project is carried out the whole province's paddy soil cadmium content distribution situation, the low research that absorbs Selection By Sifting of Rice Varieties, the passivation of paddy soil cadmium and farming technique and rice cadmium Fast Detection Technique and equipment of cadmium, subdue and blocking-up to the cadmium pollution of dining table whole process in the realization farmland, and the whole province's rice safety in production and regulatory format are set up in guiding.Domestic application microorganism repairing heavy metal in soil pollutes existing many reports, also has the scholar to think that biological restoration is difficult to reach in a short time safety standards for the mild or moderate pollution level.For this reason, the present invention adopts many bacterial classifications efficiently to make up, and puts in the soil and can form rapidly powerful bacterium colony, Adsorption of Heavy Metal Ions cadmium Cd +Solidify in a microorganism cells ancient piece of jade, round, flat and with a hole in its centre or the cell, passivation 2007.34(4) .659~662. microbiologies circular. Rhodopseudomonas palustris is removed the research of cadmium. Bai Hongjuan. Zhang Zhaoming etc. ], and the derivative that produces by its reproductive process is to heavy metal ion cadmium Cd +Absorption, passivation, the acting in conjunction of chelating, thereby reduce heavy metal ion cadmium Cd +Movability, realize to cut down crop to heavy metal ion cadmium Cd +Absorption.
Summary of the invention
For the weak point of this area, realize cutting down crop to heavy metal ion cadmium Cd +Absorption, the invention provides a kind of cadmium pollution bioremediation agents.
Another object of the present invention provides the preparation method of cadmium pollution bioremediation agents.
The 3rd purpose of the present invention provides the application of cadmium pollution bioremediation agents.
The concrete technical scheme that realizes above-mentioned purpose of the present invention is:
A kind of cadmium pollution bioremediation agents, described cadmium pollution bioremediation agents is grouped into by following one-tenth by weight:
Core rhzomorph 10-20 part;
Nutritive ingredient 10-20 part;
Enzyme active material 2-6 part;
Rhzomorph carrier 54-78 part;
Wherein, described core rhzomorph is at least a among Rhodopseudomonas palustris (Rhodop seudanonas palustris) preserving number ACCC10649, preserving number ACCC00309, the preserving number ACCC00311, bacillus cereus (Bacillus cereus) number of containing ACCC02803, at least a combination among cereuisiae fermentum (Sacchaeomyces cerevisiae) preserving number ACCC21144, the preserving number ACCC21139.Described bacterial classification is all available from Chinese agriculture microbial strains preservation administrative center.
Preferably, described cadmium pollution bioremediation agents is grouped into by following one-tenth by weight:
15 parts of core rhzomorphs;
15 parts of nutritive ingredients;
4 parts of enzyme active materials;
66 parts in rhzomorph carrier.
Wherein, the core rhzomorph in the described cadmium pollution bioremediation agents comprises Rhodopseudomonas palustris 30.0~50.0 * 10 8Cfu/g, bacillus cereus 4.0~16.0 * 10 8Cfu/g, cereuisiae fermentum 4.0~16.0 * 10 8Cfu/g, total living bacteria count 〉=60.0 * 10 8Cfu/g; Be preferably Rhodopseudomonas palustris 40.0 * 10 8Cfu/g, bacillus cereus 10.0 * 10 8Cfu/g, cereuisiae fermentum 10.0 * 10 8Cfu/g, total living bacteria count 〉=60.0 * 10 8Cfu/g.
Wherein, described nutritive ingredient is nitrogen, phosphorus, potassium, and zinc and iron; Described nitrogen, phosphorus, potassium, and the part by weight of zinc and iron is N:P 2O 5: K 2O:ZnO:Fe 2O 3=1.3:1.7:2:4:1.
Wherein, described enzyme active material is protein powder and organized enzyme.Described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 300:1~100:1 evenly is mixed; Preferably described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 200:1 evenly is mixed.Described organized enzyme is the organized enzyme that extracts from large pea green pod.The method of extracting is: at first the first-class good blue or green pod of soybean is carried out the fragmentation of plant tissue cell.Adopt phosphoric acid buffer (pH value 6.0) to be mixed in the vessel according to solid-liquid ratio 1:5, the mixed solution that obtains filters (filtering 2~3 times), removes solid impurity, obtains the crude extract of enzyme.Then 58 ℃ of heating in water bath of crude extract to obtaining, take out vessel after 10 minutes, leave standstill 5 minutes (must guard against long), the vessel bottom settlings goes out in the large pea green folder to contain solid impurity protein, get supernatant liquor in another vessel, precipitate (pH value 5.8) with ammonium sulfate.Use at last phosphoric acid buffer (pH value 5.7) that the enzyme liquid that resolution of precipitate obtains is carried out separation and purification.
Wherein, described rhzomorph carrier is wilkinite: sepiolite powder evenly mixes in the ratio of 1:0.8~1.5; Described cadmium pollution bioremediation agents is pulvis or granule,
The preparation method of cadmium pollution bioremediation agents of the present invention, it is with by weight 10-20 part core rhzomorph, 10-20 part nutritive ingredient, 2-6 part enzyme active material, 54-78 part rhzomorph carrier mixing and stirring and get.
Wherein, described core rhzomorph prepares by the following method:
With the original strain of Rhodopseudomonas palustris, bacillus cereus and cereuisiae fermentum carry out successively respectively under the aseptic condition that slant culture, shaking table are cultivated, after the fermentor cultivation, the fermented liquid that obtains is obtained spore powder through concentrate drying, then with spore powder according to Rhodopseudomonas palustris: bacillus cereus: cereuisiae fermentum is that the weight ratio of 30-50:4-16:4-16 mixes, and obtains the core rhzomorph.
Preferably, with spore powder according to Rhodopseudomonas palustris: bacillus cereus: the weight ratio of cereuisiae fermentum 4:1:1 mixes, and obtains the core rhzomorph.
The application of cadmium pollution bioremediation agents of the present invention in farm crop produce,
In application, this cadmium pollution bioremediation agents is powdery or particulate state formulation, mixes thin loess or mix in the base manure and evenly spread fertilizer over the fields when ploughing soil, levels land, and average consumption is 30kg/hm 2
Beneficial effect of the present invention is:
1, microbe species collocation of the present invention is reasonable, and comprehensive function is stronger.Microorganism in the core rhzomorph of this invention can be rapidly field planting growth and form powerful bacterium colony in soil, directly Adsorption of Heavy Metal Ions cadmium Cd +Solidified in a microorganism cells ancient piece of jade, round, flat and with a hole in its centre or the cell, passivation.Bacillus cereus in the combination and cereuisiae fermentum are to heavy metal ion cadmium Cd simultaneously +, chromium Cr +, plumbous Pb +Stronger absorption passivation is also arranged, and stronger comprehensive function has reduced heavy metal ion cadmium Cd +Movability (Dai Youzhi is permitted rosy clouds, and the natural science journal Vol.29No.3Sept.2007.79 of University Of Xiangtan~83 cereuisiae fermentum are to the absorption research of Cr in the water (VI); Pan Jianhua, Liu Ruixia, environmental science Vol.25, No.2Mar., the research of 2004.166~169 bacillus cereus Bacillus cereus Adsorption of Leads), reach and cut down crop to the absorption of heavy metal ion.
2, cadmium pollution bioremediation agents of the present invention technical office is in forward position leading in the world.Advantage function is to utilize Rhodopseudomonas palustris (being called for short the SRP bacterium), and directly S2-and the heavy metal ion reaction of absorption solidification, passivation and metabolism generation generate the sulfide precipitation of indissoluble and make heavy metal ion cadmium Cd +The dual function that passivation is solidified: high price M+ (H) → low price M+H +(M is heavy metal ion, and H is atomic hydrogen), SRP bacterium → SO 4 2-+ (H) → S 2-+ H 2O, M 2++ S 2-→ MS ↓.Because of the Rhodopseudomonas palustris surface with certain electronegativity, therefore to heavy metal ion cadmium Cd +There are stronger adsorptivity and stronger biology to prohibit throwing out, heavy metal sulfide is solidified well, be difficult to move, realize cutting down crop to the absorption of heavy metal ion cadmium Cd+.
3, the advanced science of core rhzomorph preparation method of the present invention, simple and feasible, spore count content is high, and the survival time is long.Add enzyme being mass-energy and make spore rapidly field planting growth in soil, adding nutritive ingredient can provide energy for the spore amount reproduction.
Embodiment
Following examples further specify content of the present invention, but should not be construed as limitation of the present invention.
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.Following examples just are used for explanation the present invention, rather than are used for limiting the scope of the invention.
The formation of embodiment 1 cadmium pollution bioremediation agents
15 parts of core rhzomorphs;
15 parts of nutritive ingredients;
4 parts of enzyme active materials;
66 parts in rhzomorph carrier.
The formation of described core rhzomorph
Rhodopseudomonas palustris 40.0 * 10 8Cfu/g;
Bacillus cereus 10.0 * 10 8Cfu/g;
Cereuisiae fermentum 10.0 * 10 8Cfu/g;
Effective bacterium total content 〉=60.0 * 10 8Cfu/g.
The core rhzomorph of above-mentioned formation is made by following steps:
Mix the preparation of spore powder:
1. slant culture: the original strain of Rhodopseudomonas palustris, bacillus cereus and cereuisiae fermentum is inoculated in respectively under aseptic condition on the slant medium, under 29 ± 1 ℃ of conditions, cultivates 40h;
2. shaking table is cultivated: the bacterial classification that 1. above-mentioned steps is cultivated is inoculated in respectively liquid nutrient medium under aseptic condition, be under 30 ℃ of conditions in pH6.8, temperature, and the 140r/min shaking table is cultivated 36h;
3. fermentor cultivation: the bacterial classification that 2. above-mentioned steps is cultivated is inoculated in respectively fermentation tank culture medium under aseptic condition, under pH7.2, tank pressure 0.5kg, temperature are 30 ℃, ventilation 1:0.8 condition, cultivate 50h after, the bacterium number is greater than 1.0 * 10 10/ mL, 80% thalline change at present tank of gemma, obtain fermented liquid;
4. the fermented liquid that step is obtained in 3. is prepared into spore powder through concentrate drying, with spore powder according to Rhodopseudomonas palustris: bacillus cereus: cereuisiae fermentum is that the part by weight of 4:1:1 mixes, and prepares the core rhzomorph.
In the preparation of above-mentioned mixing spore powder, the prescription of the slant medium that step is selected in 1. is as follows: composition is NaH 2PO 45.5mg/L, oxysuccinic acid 1.5mg/L, sodium acetate 2mg/L, NaOH2mg/L, NH 4Cl1mg/L, MgCl 20.25mg/L, CaCl 20.05mg/L yeast extract paste 1mg/L, micro-1m1(trace element solution are iron protochloride, cobalt chloride, nickelous chloride, cupric chloride, Manganous chloride tetrahydrate, zinc chloride, Sodium orthomolybdate, Sodium selenite (Na2SeO3) pentahydrate composite solution), pH7.0.
The liquid culture based formulas of above-mentioned steps in 2. is as follows: glucose 10g, extractum carnis 5g, yeast powder 5g, starch 10g, soybean cake powder 5g, K 2HPO 40.5g, MgSO 40.2g, water 1000mL.
The fermentor cultivation based formulas of above-mentioned steps in 3. is as follows: Semen Maydis powder 26kg, soybean cake powder 16kg, ammonium sulfate 4kg, glucose 8kg, yeast powder 2.5kg, peptone 1.7kg, add water to 600kg.
Nutritive ingredient is nitrogen, phosphorus, and potassium, and zinc and iron, and according to N:P 2O 5: K 2O:ZnO:Fe 2O 3For mixing, the part by weight of 1.3:1.7:2:4:1 makes.
Described enzyme active material is protein powder and organized enzyme.Described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 300:1~100:1 evenly is mixed; Preferably described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 200:1 evenly is mixed.Organized enzyme is the organized enzyme that extracts from large pea green pod, and the method for extraction is: at first the first-class good blue or green pod of soybean is carried out the fragmentation of plant tissue cell.Adopt phosphoric acid buffer (pH value 6.0) to be mixed in the vessel according to solid-liquid ratio 1:5, the mixed solution that obtains filters (filter 23), removes solid impurity, obtains the crude extract of enzyme.Then the 58 ℃ of heating in water bath of crude extract to obtaining took out vessel after 10 minutes, left standstill 5 minutes, and the vessel bottom settlings goes out in the large pea green pod to contain solid impurity protein, gets supernatant liquor in another vessel, precipitates (pH value 5.8) with ammonium sulfate.Use at last phosphoric acid buffer (pH value 5.7) that the enzyme liquid that resolution of precipitate obtains is carried out separation and purification.
Described rhzomorph carrier is wilkinite: sepiolite powder evenly mixes in the ratio of 1:1.
With the ratio abundant mixing of above-mentioned materials according to 10 parts of core rhzomorphs, 10 parts of nutritive ingredients, 6 parts of enzyme active materials, 74 parts in rhzomorph carrier, prepare cadmium pollution bioremediation agents of the present invention.
The formation of embodiment 2 cadmium pollution bioremediation agents
20 parts of core rhzomorphs;
20 parts of nutritive ingredients;
5 parts of enzyme active materials;
55 parts in rhzomorph carrier.
The formation of described core rhzomorph
Rhodopseudomonas palustris 30.0 * 10 8Cfu/g;
Bacillus cereus 15.0 * 10 8Cfu/g;
Cereuisiae fermentum 15.0 * 10 8Cfu/g;
Effective bacterium total content 〉=60.0 * 10 8Cfu/g.
The preparation method:
1. slant culture: the original strain of Rhodopseudomonas palustris, bacillus cereus and cereuisiae fermentum is inoculated in respectively under aseptic condition on the slant medium, under 29 ± 1 ℃ of conditions, cultivates 48h;
2. shaking table is cultivated: the bacterial classification that 1. above-mentioned steps is cultivated is inoculated in respectively liquid nutrient medium under aseptic condition, be under 30 ℃ of conditions in pH7.0, temperature, and the 160r/min shaking table is cultivated 48h;
3. fermentor cultivation: the bacterial classification that 2. above-mentioned steps is cultivated is inoculated in respectively fermentation tank culture medium under aseptic condition, under pH7.5, tank pressure 0.5kg, temperature are 30 ℃, ventilation 1:1.1 condition, cultivate 56h after, the bacterium number is greater than 1.0 * 10 10/ mL, 80% thalline change at present tank of gemma, obtain fermented liquid;
4. the fermented liquid that step is obtained in 3. is prepared into spore powder through concentrate drying, with spore powder according to Rhodopseudomonas palustris: bacillus cereus: cereuisiae fermentum is that the part by weight of 4:1:1 mixes, and prepares the core rhzomorph.
The used substratum of the used substratum of above-mentioned each step and embodiment 1 corresponding steps is identical, and the compound method of product is identical, and nutritive ingredient, enzyme active material, rhzomorph carrier are identical with embodiment 1, and just the ratio of preparation is different.
The formation of embodiment 3 cadmium pollution bioremediation agents
10 parts of core rhzomorphs;
10 parts of nutritive ingredients;
6 parts of enzyme active materials;
74 parts in rhzomorph carrier.
The formation of described core rhzomorph
Rhodopseudomonas palustris 50.0 * 10 8Cfu/g;
Bacillus cereus 5.0 * 10 8Cfu/g;
Cereuisiae fermentum 5.0 * 10 8Cfu/g;
Effective bacterium total content 〉=60.0 * 10 8Cfu/g.
The used substratum of the used substratum of each step and embodiment 1 corresponding steps was identical when above-mentioned enforcement preparation mixed spore powder, and the compound method of product is identical, and nutritive ingredient, enzyme active material, rhzomorph carrier are identical with embodiment 1, just the ratio of preparation difference.
The heavy metal cadmium bioremediation agents pot experiment of experimental example 1 embodiment of the invention 1
1 material and method
1.1 the employing pot experiment, the present invention is to different paddy soils heavy metal cadmium Cd in research +The biological restoration effect.Test arranges 2 processing, and each processes triplicate, and random district group is arranged.
Process 1.: (amounting to the field consumption is 30kg/hm to use the heavy metal cadmium bioremediation agents 425mg/ basin of the embodiment of the invention 1 2);
Process and 2. contrast CK: the heavy metal cadmium bioremediation agents of not using the embodiment of the invention 1.
1.2 the white plastic basin alms bowl of 27cm * 30cm is used in test, soil sieves through air-dry 5 orders before the dress basin, every basin dress thick approximately 20cm of soil layer (kg) uses certain N,P,K fertilizers at every basin simultaneously, and it is consistent with field management that duration of test is respectively processed the cultivation management measure.
1.3 dress basin soil picks up from respectively Hengnan County, hengyang, hunan province city and presses down the wattenshlick field in husky mire village and the yellow mud field in Anfu village on the sunny side, the detected result before the experiment sees the following form 1.
Table 1 is for the front detected result of examination soil water experiment
Figure BDA00003493463200091
1.4 Cadmium in Soil Cd +Adopt CaCl 2Lixiviate one atomic absorption spectrophotometry (graphite furnace) is measured, and the cadmium in Brown Rice and the straw is the cadmium content after atomic absorption spectrophotometry (graphite furnace) mensuration is cleared up behind the employing nitric acid one perchloric acid Mixed Acids Digestion.
2 results and analysis
2.1 test-results shows, uses the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 to the cadmium Cd in the soil +Reach the impact remarkable (seeing Table 2) of cadmium content in Brown Rice and the straw.Compare with the CK contrast, the heavy metal cadmium bioremediation agents of using inventive embodiments 1 can significantly reduce Cadmium in Soil Cd +Content.Cadmium in Soil Cd behind the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 is used in the wattenshlick field +Content has reduced by 0.096 than the CK contrast; Cadmium in Soil Cd behind the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 is used in the yellow mud field +Content has reduced by 0.042 than the CK contrast.
Table 2 couple soil Cd +Form affect the result
Figure BDA00003493463200092
2.2 Cadmium in Soil Cd +Be the Main Morphology that plant absorbing is utilized, the absorption that its content will obviously affect plant adds up.The result of table 3 shows, the heavy metal cadmium bioremediation agents of using the embodiment of the invention 1 can significantly reduce the cadmium content in Brown Rice and the straw, and makes the brown rice cadmium content reach national food hygienic standard (GB2715-2005).After the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 was used in the wattenshlick field, cadmium content had reduced by 49.1% and 50.6% than the CK contrast respectively in Brown Rice and the straw; After the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 was used in the yellow mud field, Brown Rice and straw cadmium content had reduced by 40.4% and 59.5% than the CK contrast respectively.
Table 3 is on the impact of cadmium content in Brown Rice and the straw
Figure BDA00003493463200101
2.3 this shows, the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 is to heavy metal cadmium Cd +Contaminated soil has obvious biological restoration effect, uses in right amount and can significantly reduce Cadmium in Soil Cd +Content reduces the cumulative absorption of crop.
The effect of the cadmium pollution bioremediation agents of experimental example 2 embodiment 1 and aftereffect test
1 test basic condition and material
1.1 the Brown Rice during employing field plot trial, research the present invention were produced two seasons absorbs Cadmium Accumulation Cd +Impact and after effect.Test site is selected in respectively that the Hengnan County, Hunan Province is pressed down husky mire village on the sunny side and the Anfu village carries out, and husky mire village soil is the moisture soil that river alluvium forms, and Anfu village soil is yellow mud field soil, and detected result sees Table 4 before the experiment.
Table 4 is for the front result of laboratory test of examination soil testing
1.2 test arranges 3 processing, does not establish repetition, establishes the protective belt all around, the wide ridge of 0.5m interval is established in the minizone.
1. contrast CK: the heavy metal cadmium bioremediation agents of not using the embodiment of the invention 1;
2. use the heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 2;
3. use the heavy metal cadmium bioremediation agents 30kg/hm of the embodiment of the invention 1 2
1.3 the first season, early rice was used the heavy metal cadmium bioremediation agents of the embodiment of the invention 1, the second season, late rice was not used.Concrete application process is for before this cadmium pollution moisture soil is turned over fertilising, and the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 is mixed thin loess evenly to be spread fertilizer over the fields at soil surface, or spreads fertilizer over the fields with using base manure.The chemical fertilizer of all processing, the applications of pesticide and irrigation management are all consistent.Atomic absorption spectrophotometry (graphite furnace) was measured after cadmium content in Brown Rice and the straw adopted nitric acid one perchloric acid Mixed Acids Digestion.
2 results and analysis
2.1 to the first season early rice action effect obviously utilize the cadmium pollution bioremediation agents of the embodiment of the invention 1 that paddy soil is tested after, the test effect of early rice sees Table 2 to the first season, result's demonstration, the heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 is used in the wattenshlick field 2And 30kg/hm 2Cadmium content reduces by 27.1% and 50.6% than the CK contrast respectively in the Brown Rice of processing; The heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 is used in the yellow mud field 2And 30kg/hm 2Cadmium content reduces by 23.2% and 42.4% than the CK contrast respectively in the Brown Rice of processing.Wherein use the heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 2And 30kg/hm 2Cadmium content all reaches national food hygienic standard (GB2715-2005) in the Brown Rice of processing.Therefore, the cadmium pollution bioremediation agents of the employing embodiment of the invention 1 can significantly reduce the cadmium content in the Brown Rice, illustrates the cadmium Cd in the paddy soil of Cadmium Pollution in Soils +Has obvious repairing effect.
2.2 the aftereffect of late rice is obvious to the second season: after utilizing the cadmium pollution bioremediation agents of the embodiment of the invention 1 that paddy soil is tested, to the second season late rice planting experiment result such as table 5, the result shows, cadmium content still significantly is lower than contrast in the second season late rice brown rice.Wherein, the heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 is used in the wattenshlick field 2And 30kg/hm 2Cadmium content reduces by 28.3% and 33.2% than the CK contrast respectively in the late rice brown rice in the treatment zone; The heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 is used in the yellow mud field 2And 30kg/hm 2Cadmium content reduces by 28.2% and 33.9% than the CK contrast respectively in the late rice brown rice in the treatment zone.The cadmium pollution bioremediation agents that explanation is used the embodiment of the invention 1 at double rice cropping system has preferably after effect.
Effect and the after effect of table 5 cadmium pollution bioremediation agents
Figure BDA00003493463200121
2.3 test-results shows, uses the heavy metal cadmium bioremediation agents 24kg/hm of the embodiment of the invention 1 in wattenshlick field and yellow mud field 2And 30kg/hm 2Cadmium content all has reduction than the CK contrast respectively in the late rice brown rice in the treatment zone, but consumption is 24kg/hm 2Processing 2. in the brown rice of its after effect cadmium content do not reach national food hygienic standard (GB2715-2005).Therefore suggestion is used the heavy metal cadmium bioremediation agents of the embodiment of the invention 1 with 30kg/hm 2Be advisable.
Although the above describes the present invention in detail with most preferred embodiment, those skilled in the art should know, and under the prerequisite that does not depart from inventive concept and spirit, any improvement and modification to the present invention makes still belong within the scope of protection of present invention.

Claims (10)

1. a cadmium pollution bioremediation agents is characterized in that, described cadmium pollution bioremediation agents is grouped into by following one-tenth by weight:
Core rhzomorph 10-20 part;
Nutritive ingredient 10-20 part;
Enzyme active material 2-6 part;
Rhzomorph carrier 54-78 part;
Wherein, described core rhzomorph is at least a among Rhodopseudomonas palustris (Rhodop seudanonas palustris) preserving number ACCC10649, preserving number ACCC00309, the preserving number ACCC00311, bacillus cereus (Bacillus cereus) preserving number ACCC02803, at least a combination among cereuisiae fermentum (Sacchaeomyces cerevisiae) preserving number ACCC21144, the preserving number ACCC21139.
2. cadmium pollution bioremediation agents according to claim 1 is characterized in that, described cadmium pollution bioremediation agents is grouped into by following one-tenth by weight:
15 parts of core rhzomorphs;
15 parts of nutritive ingredients;
4 parts of enzyme active materials;
66 parts in rhzomorph carrier.
3. cadmium pollution bioremediation agents according to claim 1 and 2 is characterized in that, the core rhzomorph in the described cadmium pollution bioremediation agents comprises Rhodopseudomonas palustris 30.0~50.0 * 10 8Cfu/g, bacillus cereus 4.0~16.0 * 10 8Cfu/g, cereuisiae fermentum 4.0~16.0 * 10 8Cfu/g, total living bacteria count 〉=60.0 * 10 8Cfu/g; Be preferably Rhodopseudomonas palustris 40.0 * 10 8Cfu/g, bacillus cereus 10.0 * 10 8Cfu/g, cereuisiae fermentum 10.0 * 10 8Cfu/g, total living bacteria count 〉=60.0 * 10 8Cfu/g.
4. cadmium pollution bioremediation agents according to claim 1 is characterized in that, described nutritive ingredient is nitrogen, phosphorus, potassium, and zinc and iron; Described nitrogen, phosphorus, potassium, and the part by weight of zinc and iron is N:P 2O 5: K 2O:ZnO:Fe 2O 3=1.3:1.7:2:4:1.
5. cadmium pollution bioremediation agents according to claim 1 is characterised in that described enzyme active material is protein powder and organized enzyme.Described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 300:1~100:1 evenly is mixed; Preferably described enzyme active material is according to protein powder: organized enzyme is that the part by weight of 200:1 evenly is mixed; Described organized enzyme is the organized enzyme that extracts from large pea green pod.
6. cadmium pollution bioremediation agents according to claim 1 is characterized in that, described rhzomorph carrier is wilkinite: sepiolite powder evenly mixes in the ratio of 1:0.8~1.5; Described cadmium pollution bioremediation agents is pulvis or granule.
7. the preparation method of the described cadmium pollution bioremediation agents of claim 1-6 any one, it is characterized in that, it is with by weight 10-20 part core rhzomorph, 10-20 part nutritive ingredient, 2-6 part enzyme active material, 54-78 part rhzomorph carrier mixing and stirring and get.
8. preparation method according to claim 7 is characterized in that, described core rhzomorph prepares by the following method:
With the original strain of Rhodopseudomonas palustris, bacillus cereus and cereuisiae fermentum carry out successively respectively under the aseptic condition that slant culture, shaking table are cultivated, after the fermentor cultivation, the fermented liquid that obtains is obtained spore powder through concentrate drying, then with spore powder according to Rhodopseudomonas palustris: bacillus cereus: cereuisiae fermentum is that the weight ratio of 30-50:4-16:4-16 mixes, and obtains the core rhzomorph.
9. preparation method according to claim 8 is characterized in that, with spore powder according to Rhodopseudomonas palustris: bacillus cereus: the weight ratio of cereuisiae fermentum 4:1:1 mixes, and obtains the core rhzomorph.
10. the application of each described cadmium pollution bioremediation agents of claim 1-6 in farm crop produce.
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CN104560804A (en) * 2014-12-25 2015-04-29 洪湖市添瑞生物制品厂 Mixed microbial agent for soil remediation, and preparation method and application thereof
CN105016873A (en) * 2015-07-15 2015-11-04 中国科学院地理科学与资源研究所 Compound mixed biological bacterial fertilizer for restoring cadmium contaminated soil and preparation method and application thereof
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