CN102671632B - Method for manufacturing low-cost biological adsorbent - Google Patents
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- CN102671632B CN102671632B CN201210127944.6A CN201210127944A CN102671632B CN 102671632 B CN102671632 B CN 102671632B CN 201210127944 A CN201210127944 A CN 201210127944A CN 102671632 B CN102671632 B CN 102671632B
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Abstract
The invention relates to a method for manufacturing a low-cost biological adsorbent. The method comprises the following steps of firstly selecting sesame straw as raw material, then performing chemical modification on sesame straw with citric acid to form a large number of carboxyl functional groups on the surface of sesame straw, and finally making a low-cost biological adsorbent which is excellent in adsorbing cationic dyes. The biological adsorbent prepared by the invention has the advantages that (1) the maximum monolayer adsorption capacity on methylene blue is 646.2 mg/g, which is similar to or even higher than that of certain kinds of activated carbon; (2) a new approach for recycling agricultural byproduct sesame straw is provided to effectively reduce the probability of environmental risk due to improper use of sesame straw; and (3) the method is simple, feasible, low in cost, environment-friendly and excellent in adsorbing effect, solves the problems in the prior art the chemicals for chemical modification are expensive, inconvenient to prepare and have high environmental risk, and is superior to activated carbon in competitive advantage of removing cationic dyes from water by adsorption.
Description
Technical field
The present invention relates to a kind of preparation method of adsorbent, especially relate to a kind of preparation method of biological adsorption agent cheaply, belong to recycling agricultural by-products, for this technical field of synthetic dyestuffs of Adsorption water body.
Background technology
That artificial synthetic dyestuffs are that one has is carcinogenic, teratogenesis, mutagenic environmental pollutants.The existence of dyestuff, on the one hand can reduce the light transmittance of water body, thereby affect hydrobiological growth, on the other hand, if the water of its pollution by people, drunk by mistake, the symptom such as can cause in a short time diarrhoea, feel sick, long-term drinking can cause even more serious harm.At present, synthetic dyestuffs annual output in the world's reaches 7 × 10
5ton, the dyeing waste water discharge capacity that only contains dyestuff can reach 1.5 × 10
8m
3, and Asia accounts for the over half of world's total release.
In view of severe dye discoloration present situation, multiple dyestuff removal technology obtains comparatively deep research.In these dyestuff removal technology, adsorption technology be the most frequently used be also the simplest technology.Most study is also that most widely used sorbing material is absorbent charcoal material at present.But active carbon has the defect that is difficult to overcome, and price is higher, reclaim and be difficult for, be difficult to be used on a large scale.So quite a lot of researcher has turned to the screening of low cost sorbing material to make sight line.Sorbing material based on biological is the important sources of low cost sorbing material, and in recent years, the multiple biological adsorption material especially biological adsorption material based on primordial plant body (as the cot of plant etc.) has obtained research comparatively widely.But although this class material is cheap, ubiquitous problem is that adsorption capacity is comparatively low, be difficult to apply among actual waste water processing.So find biomaterial dyestuff to better absorption potentiality, and improve the adsorption capacity of biomaterial by suitable method, become current researcher's significant concern point.
Scientific research personnel mainly takes the method for chemical modification to modify various original sorbing materials at present, to improve its adsorption capacity to some specific pollutants.Such as adopting sulfuric acid carbonization, nitric acid/hcl acidifying, NaOH saponification, and the complicated organic chemicals that uses some to have certain toxicity is modified etc.These chemical methodes have been run counter in itself on the one hand and have been made the original intention of eco-friendly sorbing material cheaply, through these, process, and cost significantly promotes, and has no economic competitiveness and can say; On the other hand, the chemicals itself that some chemical modification biological adsorption agent is used in manufacturing process has toxicity or severe corrosive, in production and use procedure, may produce environmental risk.It needs to be noted, even the quite high chemical modification of most material these costs of process, its Dye Adsorption ability is also difficult to bring up to desirable level.Take absorption methylene blue (MB) as example, only have indivedual materials after chemical modification, its maximum adsorption ability is higher than 500 mg/g, and few chemical modification biological adsorption agent can reach the adsorption capacity of commercialization active carbon.So, no matter be aspect adsorption capacity or aspect environment friendly, most existing chemical modification biomaterials cannot be competed with commercialization active carbon.In addition, the chemical modification sorbing material that adsorption capacity few in number is higher is often hard to tackle because of making again, and environment negative effect is obtained and is difficult for and is difficult to promote the use of compared with large or material.
Summary of the invention
For solving the deficiencies in the prior art, the object of the invention is to: recycling biomass resource on the one hand, thus reduce its improper disposal and issuable environmental risk; Provide on the other hand the preparation method of the biological adsorption agent of a kind of efficient (Efficient), cheap (Economical), be easy to get (Easy-produced), environmental friendliness (Environmental-friendly), for it is applied to provide technical support in dye wastewater treatment process on a large scale.
For achieving the above object, the present invention is achieved by the following technical solutions:
A preparation method for biological adsorption agent, is characterized in that cheaply, first choose easy acquisition, sesame stalk that storage is larger (
sesamum indicuml.) be raw material, then raw material carried out to chemical modification, on the surface of sesame stalk, form a large amount of carboxyl function groups, thereby the dye of positive ion is produced to good adsorption effect.
Further, the described detailed process to the processing of raw material sesame stalk is:
(1) collection of sesame stalk: choose the sesame stalk of overground part 10-50 cm, then sesame straw is made to the fritter of 0.1-0.5cm, by deionized water, sesame stalk fritter is carried out to cyclic washing, become colorless until wash leachate;
(2) prepare primitive organism materials A: the sesame stalk fritter after step (1) washing is dried 24 hours at the temperature conditions of 60 ° of C, then pulverize, cross 60 mesh sieves, the biomaterial after sieving is placed in to 120 ° of C baking ovens and activates 2 hours, obtain primitive organism materials A;
(3) prepare biomaterial A
1: take primitive organism materials A 20g prepared by step (2), be placed in 200mL, concentration is the citric acid solution of 0.4-1.0 M, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial A
1;
(4) prepare biomaterial A
2: biomaterial A prepared by step (3)
1centrifugation 3-5 minute under 3000rpm condition, the solid material that separation is obtained is placed in 70 ° of C baking ovens and dries 16 hours, then utilizes plant pulverizer to pulverize the solid material after drying, and obtains biomaterial A
2;
(5) prepare biomaterial A
3: by biomaterial A step (4) Suo Shu
2being placed in 120 ° of C baking ovens reacts 3 hours, the deionized water cyclic washing of cooling rear use temperature, then the sodium bicarbonate solution that working concentration is 0.05M washs repeatedly, use again deionized water cyclic washing, by the material centrifugal 3-5 minute under 3000rpm condition after washing, the solid material obtaining is placed in the baking oven of 70 ° and dries 16 hours, obtains biomaterial A
3;
(6) prepare target product biomaterial A
4: by biomaterial A step (5) Suo Shu
3utilize plant pulverizer to pulverize, cross 60 mesh sieves, obtain target product biomaterial A
4.
beneficial effect of the present invention
(1) biological adsorption agent that prepared by method of the present invention is biomaterial A
4the ability on the one hand with very strong Liquidity limit dyestuff, the maximum monolayer adsorption ability of using Langmuir model to calculate is 646.2mg/g, aspect the adsorption capacity of cationic dyes, makes it to have had competitiveness compared with active carbon; On the other hand, the present invention is for this agricultural by product of recycling sesame stalk provides new path, and that has effectively reduced its environmental risk causing because of improper utilization may.
(2) chemical treatment method that the present invention adopts, has solved that traditional chemical processes that the chemistry agent expense of using is higher, operation inconvenience, has had defects such as environmental risk, and this operating procedure is simple, with low cost, environmental friendliness, and adsorption effect is given prominence to.Through simple measuring and calculating, in theory, the biological adsorption agent that large-scale production the present invention relates to is biomaterial A
4expense (material of unit mass) lower than most water treatments the expense with activated carbon.This material (biomaterial A
4) production cost per ton under optimal conditions approximately 270 dollars, and the about 500-2500 dollar of the cost of corresponding active carbon, this makes this chemical modification biological adsorption agent of suitability for industrialized production in economy, become possibility.
Accompanying drawing explanation
Fig. 1 a be sesame stalk of the present invention without chemical treatment before (being primitive organism materials A) through amplifying the SEM figure of 500 times;
Fig. 1 b is biomaterial A prepared by the method described in the embodiment of the present invention 1
4absorption methylene blue and process are amplified the SEM figure of 500 times;
Fig. 1 c is biomaterial A prepared by the method described in the embodiment of the present invention 1
4absorption methylene blue and process are amplified the SEM figure of 8000 times;
Fig. 2 a is biomaterial A prepared by the method described in the embodiment of the present invention 1
4do not adsorb AFM (AFM) figure of methylene blue;
Fig. 2 b is biomaterial A prepared by the method described in the embodiment of the present invention 1
4aFM (AFM) figure after absorption methylene blue;
Fig. 3 is chemical modification biomaterial A prepared by the method described in the embodiment of the present invention 1
4before absorption methylene blue, biomaterial A
4after absorption methylene blue and the Fourier transform infrared spectroscopy (FTIR) of primitive organism materials A scheme;
Fig. 4 a is biomaterial A prepared by the method described in the embodiment of the present invention 1
4eDS can spectrogram;
Fig. 4 b is the biomaterial A preparing according to the method described in the embodiment of the present invention 1
4the related data list that can spectrogram obtains of EDS;
Fig. 5 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4particle size distribution figure with the primitive organism material without chemical modification;
Fig. 6 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4and the X-ray diffractogram of primitive organism materials A;
Fig. 7 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4and the TGA analysis chart of primitive organism materials A (thermogravimetric analysis figure);
Fig. 8 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4isothermal adsorption figure with primitive organism materials A absorption methylene blue;
Fig. 9 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4adsorbent Dose Effect figure with primitive organism materials A absorption methylene blue;
Figure 10 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4the adsorption process of absorption methylene blue and initial dye strength impact figure;
Figure 11 is biomaterial B prepared by the method described in the embodiment of the present invention 2
1-B
5adsorption effect figure.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to concrete introduction.
embodiment 1:
A kind of preparation method of biological adsorption agent cheaply, first choose easy acquisition, sesame stalk that storage is larger is raw material, then raw material are carried out to chemical modification, on the surface of sesame stalk, form the carboxyl function group in a large number with Liquidity limit dyestuff function
Be specially:
(1) collection of sesame stalk: choose the sesame stalk of 10-50 cm on the ground, then sesame straw is made to the fritter of 0.1-0.5cm, by deionized water, sesame stalk fritter is carried out to cyclic washing, become colorless until wash leachate;
(2) prepare primitive organism materials A: the sesame stalk fritter after step (1) washing is dried 24 hours under the temperature conditions of 60 ° of C, then pulverize, cross 60 mesh sieves, the biomaterial after sieving is placed in to 120 ° of C baking ovens and activates 2 hours, obtain biomaterial A;
(3) prepare biomaterial A
1: take biomaterial A 20g prepared by step (2), be placed in 200mL, concentration is the citric acid solution of 0.4-1.0 M, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial A
1;
(4) prepare biomaterial A
2: biomaterial A prepared by step (3)
1centrifugation 3-5 minute under 3000rpm condition, the solid material that separation is obtained is placed in 70 ° of C baking ovens and dries 16 hours, then utilizes plant pulverizer to pulverize the solid material after drying, and obtains biomaterial A
2;
(5) prepare biomaterial A
3: by biomaterial A step (4) Suo Shu
2being placed in 120 ° of C baking ovens reacts 3 hours, the deionized water cyclic washing of cooling rear use temperature, then the sodium bicarbonate solution that working concentration is 0.05M washs repeatedly, use again deionized water cyclic washing, by the material centrifugal 3-5 minute under 3000rpm condition after washing, the solid material obtaining is placed in the baking oven of 70 ° and dries 16 hours, obtains biomaterial A
3;
(6) prepare target product biomaterial A
4: by biomaterial A step (5) Suo Shu
3utilize plant pulverizer to pulverize, cross 60 mesh sieves, obtain target product biomaterial A
4, obtain chemical modification biological adsorption agent.
Fig. 1 a be sesame stalk of the present invention without chemical treatment before (being primitive organism materials A) through amplifying the SEM figure of 500 times; Fig. 1 b is biomaterial A prepared by the method described in the embodiment of the present invention 1
4absorption methylene blue and process are amplified the SEM figure of 500 times; Fig. 1 c is biomaterial A prepared by the method described in the embodiment of the present invention 1
4absorption methylene blue and process are amplified the SEM figure of 8000 times.
As shown in Fig. 1 a-Fig. 1 c, primitive organism materials A and the biomaterial A through chemical modification
4have good pore space structure, chemical modification process does not obviously have influence on the pore space structure of material.This absorption that is dye molecule provides more adsorption site.As shown in Fig. 1 a-Fig. 1 c, at biomaterial A
4adsorbed methylene blue biomaterial materials A afterwards
4surface presents little projection and layer structure, this with surface attachment a large amount of dye molecule relevant.
Fig. 2 a is biomaterial A prepared by the method described in the embodiment of the present invention 1
4do not adsorb AFM (AFM) figure of methylene blue; Fig. 2 b is biomaterial A prepared by the method described in the embodiment of the present invention 1
4aFM (AFM) figure after absorption methylene blue.
As Fig. 2 a and 2b known: absorption before biomaterial A
4resolution ratio condition lower surface at nanoscale is comparatively smooth; Biomaterial A after absorption
4surperficial present comparatively little projection uniformly, through software analysis, can learn the biomaterial A after absorption
4mean roughness is 1.58nm, and this is close with methylene blue molecular scale.Can infer, these little peaks should be the formation of adhering to due to dye molecule.
Fig. 3 is chemical modification biomaterial A prepared by the method described in the embodiment of the present invention 1
4before absorption methylene blue, biomaterial A
4after absorption methylene blue and without the FTIR collection of illustrative plates of chemical modification biomaterial A.
As shown in Figure 3: by chemical modification, the biomaterial A of making
4with respect to primitive organism materials A, in many places, there is the variation at peak, comprise the generation at new peak, the movement (as red shift) at peak, wherein the most significantly changing is exactly at 1734cm
-1the peak at place becomes more sharp-pointed and obvious after chemical modification, and what this peak represented is the characteristic peak of ester, and a large amount of increase of surperficial carboxyl (COO-) of sorbing material is described after chemical treatment.Changing also appears near the material after absorption MB herein absworption peak, illustrates that carboxyl has produced important function in adsorption process; In addition, also there is the peak that some are new in the material after absorption methylene blue, as 882cm
-1the peak representative at place is the characteristic peak of chlorine element, and chlorine element is the element being present in MB, and this material surface that also directly proof is adsorbed after MB has been assembled a large amount of dye molecules.
Fig. 4 a is biomaterial A prepared by the method described in the embodiment of the present invention 1
4power spectrum (EDS) figure; Fig. 4 b is the biomaterial A preparing according to the method described in the embodiment of the present invention 1
4the related data list can spectrogram obtaining.
As shown in Fig. 4 a and Fig. 4 b: can see biomaterial A
4there is more oxygen element in surface, can infer biomaterial A
4surface containing the existence of oxygen functional group, this be due to biomaterial be exactly mainly by some compound of polysaccharide as cellulose, hemicellulose, lignin forms.These a large amount of existence containing oxygen functional group have significant contribution to the absorption of this cationoid dyestuff of methylene blue.This conclusion can be verified by FTIR scanning spectra.
Fig. 5 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4particle size distribution figure with the primitive organism material without chemical modification.
As shown in Figure 5: before and after chemical modification, the change of granularity of material is not obvious, the biomaterial A after chemical modification
4average grain diameter than the average grain diameter without the primitive organism materials A of chemical modification, slightly reduce, this may be relevant with the crushing process in chemical modification process.But slightly reducing of particle diameter is not to promote the main cause that greatly improves of adsorption capacity under this granularity condition, some researchs of this and forefathers are similar.
Fig. 6 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4x-ray diffractogram (XRD) and the XRD figure of corresponding primitive organism materials A.
As shown in Figure 6: this biomaterial A
4for amorphous amorphous material, i.e. the collection of illustrative plates of like fibrous material.After citric acid treatment, there is not the characteristic peak of citric acid, show this biomaterial A
4citric acid crystal, proved biomaterial A are not significantly adhered in surface yet
4to obtain rather than simply citric acid is attached to primitive organism material surface through raw-material esterification.The enhancing explanation chemical modification biomaterial A of peak intensity
4degree of crystallinity improve.
Fig. 7 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4tGA analysis chart (thermogravimetric analysis figure).
As shown in Figure 7: biomaterial A
4after temperature reaches 500 ° of C, weight is substantially constant, can think this biomaterial A with this understanding
4decomposed complete; And the decomposition peak who produces under 300 ° of C-480 ° of C conditions is relevant with carbonaceous materials such as the cellulose existing in material, hemicellulose, lignin.Can find, when 200 ° of C left and right, biomaterial A
4dTG curve have a significant peak, and primitive organism materials A under corresponding temperature condition without this peak; We know, the decomposition temperature of citric acid is 175 ° of C, and biomaterial A after citric acid treatment
4there is no herein decomposition peak, the biomaterial A that this test is made is described
4surface does not have the citric acid of significant quantity.Decomposition peak under 200 ° of C conditions may be citric acid and biomaterial A
4in conjunction with the decomposition peak of ester type compound.We can be obtained by Fig. 7 in addition, and the residue percentage that decomposes latter two material completely exists significant difference, biomaterial A
4residue ratio is significantly less than the ratio of the residue of primitive organism materials A, and possible cause is biomaterial A
4due to a large amount of citric acid generation esterifications, and the ratio that it can decomposed substance is significantly increased.
Fig. 8 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4isothermal adsorption figure with the primitive organism materials A absorption methylene blue without chemical modification.
As shown in Figure 8: through the biomaterial A of chemical modification
4relatively through the Dye Adsorption ability of chemically treated primitive organism materials A, greatly do not increase, from 172.6 mg/g, be increased to 646.2mg/g.And biomaterial A
4meet very much Langmuir isotherm adsorption model, illustrate that this biomaterial meets the hypothesis of Langmuir model: adsorbent surface absorption adhesive ability is homogeneous, and is monolayer adsorption.This is similar to most sorbing materials based on biological.
Fig. 9 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4adsorbent Dose Effect figure with the primitive organism materials A absorption methylene blue without chemical modification.
As shown in Figure 9: wherein q
eimplication be sorbing material when reaching adsorption equilibrium, the quality of the adsorbate of the sorbent-loaded of unit mass (being MB here).At initial concentration, be the adsorbents that add different amounts in the methylene blue solution of 500 mg/L, can find, under this experimental condition, add 1g A
4in this solution of 1L, just can reach good removal efficiency (approaching 99%).Along with the increase of adsorbent addition, the amount of the dyestuff of unit sorbent-loaded is on a declining curve.
Figure 10 is biomaterial A prepared by the method described in the embodiment of the present invention 1
4the adsorption process of absorption methylene blue and initial dye strength impact figure.
As shown in figure 10: wherein q
timplication be at certain the special time t adding after adsorbent, by the quality of the adsorbate of the sorbent-loaded of unit mass (MB).Under the different initial concentration condition of dyestuff, (be respectively 300,500,700 mg/L), the dosage of adsorbent is 1g/L, along with adsorption time increases, can see: under relatively low dye strength condition (as 300mg/L), adsorption process reaches balance very soon; Under higher concentration condition, need to approach for approximately 1.5 hours balance.This biomaterial A is described
4when low consistency conditions, mainly rely on adsorption site absorbing dye, spread in needing by particle when higher concentration, by biomaterial A
4the unnecessary dyestuff that surface cannot be adsorbed is delivered to adsorbent inside by diffusion, carries out further suction-operated.
embodiment 2:
A kind of preparation method of biological adsorption agent cheaply, in manufacturing process, the factor of major effect material adsorption effect is the concentration conditions of citric acid, and the present embodiment has been investigated the biological adsorption material made under the different citric acid concentration conditions adsorption effect for the dye of positive ion.Its concrete implementation step is as follows:
(1) collection of sesame stalk: choose the sesame stalk of 10-50 cm on the ground, then sesame straw is made to the long fritter of 0.1-0.5cm, by deionized water, sesame stalk fritter is carried out to cyclic washing, become colorless until wash leachate;
(2) prepare primitive organism materials A: the sesame stalk fritter after step (1) washing is dried 24 hours at the temperature conditions of 60 ° of C, then pulverize, cross 60 mesh sieves, the biomaterial after sieving is placed in to 120 ° of C baking ovens and activates 2 hours, obtain primitive organism materials A;
(3) prepare series of biologic material B
1-1to B
1-5, according to the concentration difference (citric acid concentration is respectively 0,0.1,0.4,0.7,1.0M) of the citric acid adding, its numbering is respectively B
1-1to B
1-5: take primitive organism materials A 20g prepared by step (2), be placed in the 200mL aqueous solution (without citric acid) and form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial B
1-1; Take biomaterial A 20g prepared by step (2), be placed in 200mL 0.1M citric acid solution, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial B
1-2; Take biomaterial A 20g prepared by step (2), be placed in 200mL 0.4M citric acid solution, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial B
1-3; Take biomaterial A 20g prepared by step (2), be placed in 200mL 0.7M citric acid solution, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial B
1-4; Take biomaterial A 20g prepared by step (2), be placed in 200mL 1.0M citric acid solution, form enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtain biomaterial B
1-5;
(4) prepare biomaterial B
2-1to B
2-5(corresponding B respectively
1-1to B
1-5, lower same): biomaterial B prepared by step (3)
1the biomaterial of series is difference centrifugation 3-5 minute under 3000rpm condition, and the solid material that separation is obtained is placed in 70 ° of C baking ovens and dries 16 hours, then utilizes plant pulverizer to pulverize the solid material after drying, and obtains B
2series of biologic material;
(5) prepare B
3-1to B
3-5series of biologic material: by series of biologic material B step (4) Suo Shu
2being placed in 120 ° of C baking ovens reacts 3 hours, the deionized water cyclic washing of cooling rear use temperature, then the sodium bicarbonate solution that working concentration is 0.05M washs repeatedly, with deionized water cyclic washing and after each washing, under 3000rpm condition, carry out centrifugation again, the baking oven that the centrifugal solid material obtaining of washing is placed in to 70 ° of C is dried 16 hours, obtains B
3series of biologic material;
(6) prepare serial target product biological adsorption material B
4-1to B
4-4: by B step (5) Suo Shu
3series of biologic material plant pulverizer is pulverized respectively, crosses 60 mesh sieves, obtains serial target product biomaterial B
4-1to B
4-5, obtain chemical modification biological adsorption agent.
Figure 11 is serial target product biological adsorption material B prepared by the method described in the embodiment of the present invention 2
4-1to B
4-4adsorption effect figure.Main experimental condition is: initial dye strength is 500 mg/L, and adsorbent dosage is 1g/L, and pH is 8.0.
As shown in figure 11, under this experimental condition, the concentration of citric acid has significant impact for the adsorption effect of chemical modification biological adsorption material.Citric acid concentration is when lower than 0.4M, and along with the increase of citric acid concentration, the adsorption effect of sorbing material significantly promotes; And when citric acid concentration is during higher than 0.4M, its sorbing material adsorption effect of making is significant lifting not.As can be seen here, under this experimental condition, the citric acid of 0.4M concentration is the optium concentration of producing this biomaterial.And citric acid concentration is while being 0.4-1.0M condition, the adsorption effect of material is best.
Above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (1)
1. the preparation method of biological adsorption agent cheaply, it is characterized in that, first choosing sesame stalk is raw material, then raw material are carried out to chemical modification, on the surface of sesame stalk, form the carboxyl function group that in a large number dye of positive ion is produced good adsorption effect, the described detailed process to the processing of raw material sesame stalk is:
(1) collection of sesame stalk: choose the sesame stalk of overground part 10-50 cm, then sesame straw is made to the fritter of 0.1-0.5cm, by deionized water, sesame stalk fritter is carried out to cyclic washing, become colorless until wash leachate;
(2) prepare primitive organism materials A: the sesame stalk fritter after step (1) washing is dried 24 hours under the temperature conditions of 60 ° of C, then pulverize, cross 60 mesh sieves, the biomaterial after sieving is placed in to 120 ° of C baking ovens and activates 2 hours, obtain primitive organism materials A;
(3) prepare biomaterial A
1: take primitive organism materials A 20g prepared by step (2), the citric acid solution that to be placed in 200mL, concentration be 0.4-1.0M, forms enclosed system, and the baking oven that this enclosed system is placed in 70 ° of C is reacted 2 hours, obtains biomaterial A
1;
(4) prepare biomaterial A
2: biomaterial A prepared by step (3)
1centrifugation 3-5 minute under 3000rpm condition, the solid material that separation is obtained is placed in 70 ° of C baking ovens and dries 16 hours, then utilizes plant pulverizer to pulverize the solid material after drying, and obtains biomaterial A
2;
(5) prepare biomaterial A
3: by biomaterial A step (4) Suo Shu
2being placed in 120 ° of C baking ovens reacts 3 hours, the deionized water cyclic washing of cooling rear use temperature, then the sodium bicarbonate solution that working concentration is 0.05M washs repeatedly, use again deionized water cyclic washing, by the material centrifugal 3-5 minute under 3000rpm condition after washing, the baking oven that the solid material obtaining is placed in 70 ° of C is dried 16 hours, obtains biomaterial A
3;
(6) prepare target product biomaterial A
4: by biomaterial A step (5) Suo Shu
3utilize plant pulverizer to pulverize, cross 60 mesh sieves, obtain target product biomaterial A
4.
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| CN103566905B (en) * | 2013-10-29 | 2015-08-12 | 湖南大学 | Modified wood chips adsorbent, preparation method and in process containing the application in basic-dyeable fibre waste water |
| CN103896358B (en) * | 2014-03-06 | 2016-08-24 | 西安工程大学 | Use the method that the modified abandoned straw of cationic protein processes dyeing waste water |
| CN110180498A (en) * | 2019-05-23 | 2019-08-30 | 江苏省农业科学院 | Carry the preparation method and application of lanthanum magnetism hydro-thermal charcoal adsorbent |
| CN111468077A (en) * | 2020-04-09 | 2020-07-31 | 中国科学院新疆生态与地理研究所 | Preparation method and application of Calligonum mongolicum biological adsorbent |
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| CN102266756A (en) * | 2011-07-25 | 2011-12-07 | 武汉工程大学 | Preparation method of citric acid modified rape straw adsorbent and application thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266756A (en) * | 2011-07-25 | 2011-12-07 | 武汉工程大学 | Preparation method of citric acid modified rape straw adsorbent and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| Basic dye adsorption onto an agro-based waste material – Sesame hull (Sesamum indicum L.);Yanfang Feng et al.;《Bioresource Technology》;20110827;摘要、第1028页第2节 * |
| Yanfang Feng et al..Basic dye adsorption onto an agro-based waste material – Sesame hull (Sesamum indicum L.).《Bioresource Technology》.2011, |
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| CN102671632A (en) | 2012-09-19 |
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