CN102228899B - Repair method of phenylamine compound-polluted soil - Google Patents

Repair method of phenylamine compound-polluted soil Download PDF

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Publication number
CN102228899B
CN102228899B CN 201110096279 CN201110096279A CN102228899B CN 102228899 B CN102228899 B CN 102228899B CN 201110096279 CN201110096279 CN 201110096279 CN 201110096279 A CN201110096279 A CN 201110096279A CN 102228899 B CN102228899 B CN 102228899B
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soil
sierozem
clover
alfalfa
mixed
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CN102228899A (en
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南忠仁
胡亚虎
曾潮生
牛亚萍
赵伟宾
王胜利
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Lanzhou University
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Lanzhou University
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Abstract

The invention relates to a repair method of phenylamine compound-polluted soil, which comprises the following steps of: 1, uniformly mixing the phenylamine compound-polluted soil with a mixture of sierozem and city dewatering sludge according to a proportion to obtain mixed soil; 2, adding wheat bran in the mixed soil, stirring ferrous sulfate in so that the pH value of the mixed soil is neutral, planting lucerne or whitetip clover on the mixed soil in the open air; and 3, managing the lucerne or whitetip clover according to the conventional planting method, when the lucerne or whitetip clover grow up, cradling the lucerne or whitetip clover, and stubbling with length of 3-5cm. The invention has the advantages of low cost, small environment disturbance, no secondary pollution, easiness in public acceptance, and capabilities of being suitable for repair of large-area polluted areas and increasing soil organic matters and soil fertility.

Description

A kind of restorative procedure of soil polluted by aniline compound
Technical field
The present invention relates to the phytoremediation technology of contaminated environment, relate in particular to a kind of restorative procedure of soil polluted by aniline compound.
Background technology
Amino benzenes compounds is the synthetic intermediate such as azo dyes, herbicide, pesticide, medicine, explosive, is again the catabolite of herbicide, pesticide in agricultural production.Aniline categories is mainly derived from its production process in the environment, because the production of amino benzenes compounds generally is as raw material take nitro-aromatic compound, therefore in the process of producing, will produce the refuse of materials such as containing in a large number phenyl amines and nitro-aromatic compound, will discharge the aniline waste water of 2,000,000 t such as the aniline of producing 1.5 ten thousand t every year.The random discharging that contains amino benzenes compounds waste water is its main path that enters soil.According to statistics, the output of the annual aniline of China has reached 80,000 t, and its downstream product has more than 150 to plant, and the amino benzenes compounds that the whole world enters in the environment every year is about 30,000 t.Along with the development of chemical engineering industry, the demand of phenyl amines chemicals is the trend of obvious rising, and the amount of entered environment also can get more and more thus, also can be increasing to the harm of environment.
Amino benzenes compounds is insoluble in water, is soluble in organic solvent, has very strong toxicity, particularly carcinogenicity, and it can pass through the approach such as respiratory tract, alimentary canal, skin to the human body injury, causes methemoglobinemia.Therefore, it has been listed in Environment Priority monitoring pollutant blacklist by EPA (USEPA) and Environmental Protection in China section.Because amino activation to phenyl ring in the amino benzenes compounds molecular structure, it is compared with nitro-aromatic compound, and it has certain reproducibility, is degraded than the mode that is easier to by chemistry or biological.On November 13rd, 2005, two benzene factories of Jilin Petrochemical company blast in one workshop, and about 100t benzene class material (comprising benzene, aniline, nitrobenzene) flows into Song Hua River, causes the severe contamination of river.This event has promoted the research of people to aspects such as amino benzenes compounds contaminated environment reparations.
Current, research is more aspect the reparation of amino benzenes compounds polluted-water both at home and abroad, it mainly concentrates on the research aspect of amino benzenes compounds efficient degradation screening and degradation characteristic, but aspect the reparation of its contaminated soil, present research is just at the early-stage.The recovery technique of soil polluted by aniline compound has the method for physics, chemistry, biology and plant, but the method cost of physics, chemistry is high, brings easily secondary pollution in the repair process, and the structure of meeting spoiled soil is unsuitable for the original position reparation of contaminated soil.The biological prosthetic laboratory stage that also mainly rests on, under the field condition survival of degradation bacteria with and the size of degradation capability then can become its important restrictive factor.Compare with other recovery technique, phytoremediation technology is a kind of contaminated soil recovery technique of rising in recent years, since its environmental friendliness, economy and the original position reparation that is applicable to large tracts of land, low concentration pollution soil, and be subject to paying close attention to widely and becoming the focus that environmental science is studied.The phytoremediation of organic polluted soil is actually jointly degrade target contaminant in the soil of the compound system that utilizes soil-plant-microorganism.The existence of plant can improve quantity and the activity of microorganism in the rhizosphere soil, and then promotes the removal of target contaminant in the soil.
Phytoremediation be a kind of cheapness, effectively, the recovery technique of huge applications prospect arranged, this technical operation is simple, be suitable for the pollution in wide area site, especially the reparation of farmland organic polluted soil, therefore, the reparation research of carrying out soil polluted by aniline compound has important scientific value and realistic meaning.
Summary of the invention
Technical problem to be solved by this invention provides that a kind of expense is cheap, environmental perturbation is little, non-secondary pollution, accepted, can be applicable to the reparation of pollution in wide area site by masses easily, and can increase the soil organism and the restorative procedure of the soil polluted by aniline compound of increasing soil fertility.
For addressing the above problem, the restorative procedure of a kind of soil polluted by aniline compound of the present invention may further comprise the steps:
(1) will be by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge according to 1~4: after 11.5~14.5 dry weight ratio mixes, obtain mixed soil; Sierozem is 10.5~13.5: 1 with the dry weight ratio of city dehydrated sludge in the wherein said mixture;
(2) in described mixed soil, press the per kilogram mixed soil and add wheat bran 0.01~0.02kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of described mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at described mixed soil;
(3) described alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, described alfalfa or clover are cradled, toothing 3~5cm gets final product.
Described sierozem refers to common sierozem, light sierozem, grassy marshland sierozem or Salinized sierozem.
The present invention compared with prior art has the following advantages:
1, because legume of the present invention---alfalfa and Trifolium is in herbaceos perennial, cradle renewable, and have well developed root system, bury darker, can effectively utilize the characteristics of moisture and the nutrient of deep subsoil, therefore, the present invention not only can carry out continuous repair to contaminated soil, and environmentally friendly, can not produce secondary pollution; Simultaneously, alfalfa and trefoil root system be the nitrogen in the middle of the atmosphere fixedly, except satisfying self required nitrogen, can also increase the nitrogen in the soil, is good green manure plant.
2, because alfalfa of the present invention and clover have stronger resistance, therefore wide adaptability, can not be subjected to the restriction of region when being used for repairing soil polluted by aniline compound; Simultaneously, its flourishing root system can prevent and slow down the phenomenon that wind erosion and water erosion occur contaminated soil.
3, because the present invention has added viscosity and the Acidity of Aikalinity that a certain amount of wheat bran and ferrous sulfate are regulated soil in the contaminated soil, therefore, so that repairing effect is more outstanding.
4, repairing effect of the present invention is good.
(1) plant original position repairing test on the contaminated soil
For trying soil: the red water pollued field that picks up from the military products production discharging of the chemical group company in Gansu Province for the examination soil polluted by aniline compound, its basic physical and chemical is: psychrometric ratio 90.78%, pH value 9.13, organic 48.84g/kg, available phosphorus 3.13mg/kg, calcium carbonate 92.54g/kg.
Test plant: select perennial legume alfalfa (Medicago sativa L.), clover (Trifolium repens L.) to be the test plant of this test.
Above-mentioned low for the examination soil moisture content, be alkalescence, soil organic matter content is higher, and soil nutrient content is low, directly plants test plant alfalfa and clover thereon, the vertical seedling difficulty of plant, its repairing effect is not satisfactory.
(2) the phytoremediation research of soil polluted by aniline compound under the plot experiment condition
For trying soil: for trying soil polluted by aniline compound with (1).In view of tested contaminated soil crop is difficult to vertical seedling, in order to improve the contaminated soil situation, contaminated soil is mixed according to certain proportioning with sierozem, city dehydrated sludge.Sierozem is taken from the unpolluted soil in peace town, Yuzhong County, Lanzhou, and activated sludge in Yanerwan sewage plant sewage treatment plant is taken from the city dehydrated sludge, and its physicochemical property sees Table 1.
Table 1 is for the examination physiochemical properties of soil
Annotate: "-" expression undetermined.
Test plant is with (1).
Quarter Design: this is tested in 2009 and carries out in the Lanzhou University botanical garden, is the outdoor cell test.Each test unit lattice is designed to the lattice of 0.30m * 0.30m, uses the plastic plate barrier between the cell, and dividing plate buried depth 50cm places mixed soil 15.5kg in each cell.
Test is processed: test is divided into 4 processing, and each is processed and repeats 4 times.Contaminated soil, sierozem and city dehydrated sludge add the wheat bran of 0.01~0.02kg as conditioner and swelling agent simultaneously according to mixing shown in the table 2 in mixed soil.PH value to the plant of in addition, admixing again the ferrous sulfate adjusting test soil of 10g in the red water contaminated soil of per kilogram is fitted kind of a condition.The disposable filling of cell is saturating, sows behind the placement 3d.Sowing time is on April 17th, 2009, alfalfa or 150/lattice of clover seed.After planting, normal irrigation is in conjunction with actual weeds and spray insecticide deinsectization and the growing state of the germination of periodic logging seed and plant removed.Alfalfa and trefoil harvesting time are on August 21st, 2009.
The proportioning of table 2 contaminated soil, sierozem and mud (dry weight weight ratio: kg/kg)
Process Contaminated soil Sierozem Municipal sludge
I 4 10.5 1
II 3 11.5 1
III 2 12.5 1
IV 1 13.5 1
Result of the test is as follows:
The germination percentage of alfalfa as shown in Figure 1, its germination percentage all can be divided into over time fast increase, increase slowly and germinate and stop 3 stages under the different disposal.Be the fast increase stage 26~May 3 April during this period of time, and the germination percentage of alfalfa is the trend that increases gradually in time; After May 3, the trend that germination percentage increases is slowed down; After May 7, germinate and finish.Under 4 processing, the germination percentage of processing alfalfa under the II all is higher than other processing, and its accumulative total germination percentage is up to 52%.What Fig. 3 showed is the situation of change of clover germination percentage under the different disposal, its situation of change and alfalfa basically identical.Wherein, trefoil germination percentage will be far above all the other 3 processing under the processing IV, and its accumulative total germination percentage is up to 32.3%.
Fig. 2 and Fig. 4 show respectively be alfalfa and trefoil plant height over time.Can see that along with the prolongation of growth time, the plant height of the two all approaches linear increasing under the different disposal.The variation difference of alfalfa its plant height under different disposal is significantly (P>0.05) not, and trefoil plant height will be higher than other 3 processing (P<0.05) significantly under the II and process during results.
Can see that it is less on germination percentage and the plant height impact of alfalfa that this tests red water contaminated soil under the different proportionings, and the high processing of pollution level obviously can suppress the follow-up growth of clover Seed germination and plant.As seen, alfalfa will significantly be higher than clover to the tolerance of soil polluted by aniline compound.
What show in the table 3 is under the two Plants conditions, the situation of change of the content of amino benzenes compounds before and after repairing, it is on the basis of testing in the above, further investigated in the presence of confession examination legume alfalfa, clover, it is to the removal effect of amino benzenes compounds in the soil under the different disposal.
Variation (the unit: mg/kg) of table 3 amino benzenes compounds content before and after repairing
Annotate: "-" expression does not detect.
Can see that from table 3 dinitroanilines in the contaminated soil is through alfalfa with after the trefoil reparation season, its clearance has all reached 100%.The dinitrotoluene (DNT) amine all has residual under two Plants conditions, compare with dinitroanilines, its residual in soil and it before reparation in the soil higher content have than Important Relations, its before reparation in the soil shared ratio be 98.60%.Under the condition of plantation alfalfa, the clearance of dinitrotoluene (DNT) aminated compounds under different disposal is: 55.95%-79.05%, average removal rate are 68.19%; Under the plantation clover condition, the clearance of dinitrotoluene (DNT) aminated compounds is 49.30%-78.50%, and average removal rate is 64.78%.
In addition, measurement result to alfalfa and clover aerial part amino benzenes compounds content shows, amino benzenes compounds all is not detected at two Plants aerial parts, show under two kinds of test plant conditions, the removal of amino benzenes compounds is take the rhizosphere degradation as main in the contaminated soil, and the existence of plant has promoted the removal of this compounds in the soil.
In sum, alfalfa and clover all can have the removal effect to the amino benzenes compounds in the red water contaminated soil.
5, the present invention compares with other recovery technique, and environmental perturbation is little, rehabilitation cost is low, can not bring secondary pollution, also can increase the fertility of soil in repairing polluted soil.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the germination percentage curve of alfalfa under the different disposal level of the present invention.
Fig. 2 is the change of height curve of alfalfa under the different disposal level of the present invention.
Fig. 3 is trefoil germination percentage curve under the different disposal level of the present invention.
Fig. 4 is trefoil change of height curve under the different disposal level of the present invention.
The specific embodiment
The restorative procedure of 1 one kinds of soil polluted by aniline compounds of embodiment may further comprise the steps:
(1) will be mixed than (kg/kg) according to 1: 14.5 dry weight by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge after, obtain mixed soil; Wherein the dry weight ratio of sierozem and city dehydrated sludge is 13.5: 1 (kg/kg) in the mixture.
(2) in mixed soil, press the per kilogram mixed soil and add wheat bran 0.01kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at mixed soil.
(3) alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, alfalfa or clover are cradled, toothing 3~5cm gets final product.
The restorative procedure of 2 one kinds of soil polluted by aniline compounds of embodiment may further comprise the steps:
(1) will be mixed than (kg/kg) according to 2: 13.5 dry weight by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge after, obtain mixed soil; Wherein the dry weight ratio of sierozem and city dehydrated sludge is 12.5: 1 (kg/kg) in the mixture.
(2) in mixed soil, press the per kilogram mixed soil and add wheat bran 0.02kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at mixed soil.
(3) alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, alfalfa or clover are cradled, toothing 3~5cm gets final product.
The restorative procedure of 3 one kinds of soil polluted by aniline compounds of embodiment may further comprise the steps:
(1) will be mixed than (kg/kg) according to 3: 12.5 dry weight by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge after, obtain mixed soil; Wherein the dry weight ratio of sierozem and city dehydrated sludge is 11.5: 1 (kg/kg) in the mixture.
(2) in mixed soil, press the per kilogram mixed soil and add wheat bran 0.015kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at mixed soil.
(3) alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, alfalfa or clover are cradled, toothing 3~5cm gets final product.
The restorative procedure of 4 one kinds of soil polluted by aniline compounds of embodiment may further comprise the steps:
(1) will be mixed than (kg/kg) according to 4: 11.5 dry weight by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge after, obtain mixed soil; Wherein the dry weight ratio of sierozem and city dehydrated sludge is 10.5: 1 (kg/kg) in the mixture.
(2) in mixed soil, press the per kilogram mixed soil and add wheat bran 0.018kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at mixed soil.
(3) alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, alfalfa or clover are cradled, toothing 3~5cm gets final product.
Sierozem in above-described embodiment 1~4 refers to common sierozem, light sierozem, grassy marshland sierozem or Salinized sierozem.

Claims (2)

1. the restorative procedure of a soil polluted by aniline compound may further comprise the steps:
(1) will be by the mixture of amino benzenes compounds contaminated soil and sierozem and city dehydrated sludge according to 1~4: after 11.5~14.5 dry weight ratio mixes, obtain mixed soil; Sierozem is 10.5~13.5: 1 with the dry weight ratio of city dehydrated sludge in the wherein said mixture;
(2) in described mixed soil, press the per kilogram mixed soil and add wheat bran 0.01~0.02kg; And admix ferrous sulfate 10g by the per kilogram contaminated soil, and make the pH value of described mixed soil for neutral, then adopt open-air cultivation alfalfa or clover at described mixed soil;
(3) described alfalfa or clover routinely planting patterns manage, after this alfalfa or trefoil growth expiration, described alfalfa or clover are cradled, toothing 3~5cm gets final product.
2. the restorative procedure of a kind of soil polluted by aniline compound as claimed in claim 1, it is characterized in that: described sierozem refers to common sierozem, light sierozem, grassy marshland sierozem or Salinized sierozem.
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CN102513339B (en) * 2011-12-12 2013-06-19 浙江博世华环保科技有限公司 Application of Trifolium repens in remediation of heavy metal contaminated soil
CN104893729A (en) * 2015-05-18 2015-09-09 湖南省土壤肥料研究所 Conditioner for reducing vegetable soil heavy metal ion activity

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