CN111468077A - Preparation method and application of Calligonum mongolicum biological adsorbent - Google Patents
Preparation method and application of Calligonum mongolicum biological adsorbent Download PDFInfo
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- CN111468077A CN111468077A CN202010272599.XA CN202010272599A CN111468077A CN 111468077 A CN111468077 A CN 111468077A CN 202010272599 A CN202010272599 A CN 202010272599A CN 111468077 A CN111468077 A CN 111468077A
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Abstract
The invention provides a preparation method and application of Calligonum mongolicum biological adsorbent, wherein the method uses the desert plant of the arid region to soak Calligonum mongolicum (A), (B), (C) and (C)Calligonum junceum(Fisch.et Mey.) L itv.) branches are dried in the sun and washed by distilled water, dried, crushed and sieved by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, and the powder is dried to obtain the Calligonum mongolicum biological adsorbent, wherein the maximum adsorption rate of the biological adsorbent obtained by the method for the Calligonum mongolicum branch reaches 98.83%, so that a new path is provided for resource utilization of Calligonum mongolicum of desert plants in arid regionsThe method has the advantages of low cost, environmental friendliness and outstanding adsorption effect, overcomes the defects of inconvenient manufacture, environmental risk and the like of some traditional adsorbents, and has an industrial prospect.
Description
Technical Field
The invention relates to a preparation method and application of a Calligonum mongolicum biological adsorbent, and belongs to the field of adsorption removal of methylene blue dye in water by utilizing desert plant resources in arid regions.
Background
With the continuous and deep industrialization process, the global environmental pollution continuously destroys the ecological balance formed by the earth biosphere for hundreds of millions of years and poses serious threats to the living environment of human beings. China is the first major country of textile printing and dyeing, the textile printing and dyeing industry is also a major household for industrial wastewater discharge, according to incomplete statistics, the discharge amount of printing and dyeing wastewater in China is about 300-.
The main source of the wastewater in the textile printing and dyeing industry is printing and dyeing wastewater which has large amount of wastewater, high pigment and complex components, and the wastewater contains fuel, slurry, auxiliaries, fiber impurities, inorganic salt and the like and is difficult to treat. The water consumption of a general printing and dyeing mill in China is 200-3Wherein 80-90% of the waste water is discharged. The ecological and economic losses are not quantifiable, so the problem of dyeing water pollution is absolutely necessary to solve.
The dye wastewater not only has a specific color, but also can bring a large amount of coloring after entering a natural water body, thereby having adverse effect on the growth of aquatic organisms; secondly, the components of the dye wastewater have complex structures, most of the dyes have certain toxicity, and the dye wastewater can bring great harm to organisms when entering the environment. Therefore, how to effectively and inexpensively remove the dye in water for protecting ecological environment and human health becomes a concern of many scholars.
Among coloring agents, Methylene Blue (MB) is an aromatic heterocyclic compound widely used in the textile industry to color products. MB, like other dyes, can cause eye burns, skin irritation, dyspnea, convulsions, cyanosis, tachycardia in humans and animals, and if ingested, can cause gastrointestinal irritation, nausea, vomiting, diarrhea, and the like. The dye waste water with too high content can cause adverse reactions such as human body allergy, skin inflammation, cancer, variation and the like. Because of these detrimental effects of MB on the environment and subsequently on organisms, the search for the elimination of toxic substances (such as methylene blue, etc.) from printing and dyeing wastewater is a key challenging task for researchers and an important area of research aimed at improving life, and therefore, is of high social interest.
Currently, the treatment methods aimed at methylene blue include three major methods, i.e., physicochemical method, chemical method, and biological method. The adsorption method in the physical and chemical methods is a method which is researched and reported more. The adsorption method is to make the pollutant in the waste water adsorbed on the surface of the porous substance and remove the pollutant by utilizing the physical adsorption and chemical adsorption performance of the powder or the particles of the porous solid. The method is suitable for treating wastewater containing highly toxic substances or substances difficult to biodegrade. Compared with other treatment methods, the adsorption method has the advantages of low cost, easy design, simple equipment, convenient operation, high purification rate, low energy consumption and the like, is known as an important technology for treating dye wastewater, and is more and more valued by researchers. The adsorbent is one of the important components of the adsorption method, and is capable of effectively adsorbing methylene blue solid matters from liquid. In general, a good quality adsorbent should have the following characteristics: large specific surface area, proper pore structure, strong methylene blue adsorption capacity, convenient acquisition and regeneration and better mechanical strength.
At present, the adsorbents used for treating methylene blue are roughly classified into: active carbon adsorbent, natural mineral adsorbent, waste (ash) slag adsorbent, biomass adsorbent, nano material adsorbent and the like. Activated carbon is currently the most widespread and used adsorbent, with good potential for removal of organic contaminants due to its surface porous nature. The relatively high price of activated carbon, high operating costs and problems associated with regeneration have hindered the large scale application of this technology. Activated carbon is expensive and the higher the quality the higher the price the higher this increases the cost of wastewater treatment. Moreover, solution regeneration after the use of activated carbon produces a small volume of secondary contaminated liquid, while high temperature regeneration results in a loss of activated carbon and its adsorption capacity. There is an increasing need to find productive, renewable, low cost materials as adsorbents for pollution remediation. Therefore, in recent years, there has been a great demand for biosorbents made of low-cost material agents, not requiring any additional expensive pretreatment, not harmful to the environment, and having high adsorption capacity.
The biological adsorbent for treating waste water is a water treatment method which utilizes the chemical structure and component characteristics of organisms to adsorb pollutants dissolved in water and then removes the pollutants in the water through solid-liquid two-phase separation. At present, the bio-adsorption technology has proven to be a very simple, efficient, economical, attractive, and most readily available technology for removing dyes from dye waste water. The biomass material has wide source and low price.
In recent years, researchers have achieved certain results by adsorbing methylene blue in wastewater by using natural agricultural and forestry wastes such as cotton straws, peanut shells, wheat straws, cotton, bagasse, banana peels, lavender leaves and the like and biological adsorbing materials such as plants and the like. Biosorption has proven to be the most effective technique for removing MB and metal ions from aqueous solutions. Therefore, it is of great significance to explore the utilization way of effective natural plant materials as adsorbents in sewage treatment.
Disclosure of Invention
The invention aims to provide a preparation method and application of Calligonum junceum biological adsorbent, the method utilizes branches of Calligonum junceum (Fisch.et Mey.) -L itv) of desert plants in arid regions to be dried in the sun and cleaned by distilled water, the branches are dried and crushed by 40 meshes of sieve to obtain Calligonum junceum branch powder, and the powder is dried to obtain the Calligonum rubicundunniam biological adsorbent.
The preparation method of the Calligonum mongolicum biological adsorbent provided by the invention comprises the following steps:
a. collecting the branches of the pickled Calligonum mongolicum in the field, drying in the sun, and washing with double distilled water to remove sand, dust and soluble impurities;
b. b, drying the soaked Calligonum mongolicum branches treated in the step a for 4-6 hours in an oven at the temperature of 90-100 ℃;
c. grinding the Calligonum mongolicum branches obtained in the step b into powder by a grinder, sieving the powder by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, drying the powder in an oven at the temperature of 70-90 ℃ for 1-3 hours to obtain the Calligonum mongolicum biological adsorbent, and storing the Calligonum mongolicum branch biological adsorbent in a sealed glass bottle.
The Calligonum mongolicum biological adsorbent obtained by the method is applied to the treatment of the wastewater of the preparation of methylene blue dye.
The invention relates to a preparation method and application of Calligonum mongolicum biological adsorbent, and a related data list 1 obtained by using a spectrum diagram of the biological adsorbent obtained by the method
TABLE 1
| Element(s) | Mass percent (%) | Atomic number percentage (%) |
| C | 51.21 | 58.56 |
| O | 47.84 | 41.07 |
| Ca | 0.50 | 0.17 |
| K | 0.25 | 0.09 |
| Mg | 0.14 | 0.08 |
| S | 0.06 | 0.03 |
| Mass (%) | 100 | 100 |
As can be seen from the table, the raisin tree biological adsorbent has more oxygen elements on the surface, and oxygen-containing functional groups on the surface, which are composed of polysaccharide compounds such as cellulose, hemicellulose, lignin and the like. The presence of a large number of these oxygenated functional groups contributes significantly to the adsorption of a positive example fuel such as methylene blue.
The method for preparing the Calligonum mongolicum biological adsorbent and the application thereof adopt the biological adsorption technology, overcome the defects of high chemical agent cost, inconvenient operation, environmental risk and the like in the traditional chemical treatment, and have the advantages of simple and easy operation, low cost, environmental friendliness and outstanding adsorption effect. The method provides a new path and technology for the continuous utilization of the Calligonum mongolicum resource in the desert plant of the arid region, increases new products, improves the utilization rate of wild resources and meets the ever-increasing social demand;
the biological adsorbent obtained by the method has strong capability of adsorbing methylene blue fuel in the process of preparing methylene blue dye wastewater, and the result shows that the removal rate of the methylene blue fuel exceeds 98 percent, so that the biological adsorbent has competitive power compared with activated carbon in the aspect of the adsorption capability of the methylene blue fuel; provides a new path for resource utilization of the Calligonum mongolicum belonging to the desert plant in the arid region, and effectively reduces the possibility of environmental risk caused by improper utilization.
Drawings
FIG. 1 is a photograph of Calligonum junceum (Fisch. et Mey.) L itv.) according to the present invention;
FIG. 2 is an SEM image of 500 times magnified aerial part powder of Calligonum rubicundunm of the present invention, showing that it has a good pore structure, which provides more adsorption sites for the adsorption of fuel molecules;
FIG. 3 is an energy spectrum (EDS) diagram of a powdered biosorbent of aerial parts of Calligonum rubicundunm according to the present invention;
FIG. 4 shows that when the particle size of the Calligonum rubicundunm biological adsorbent is 40 meshes, the adsorption effect is optimal, the adsorption rate is 89.25%, and the adsorption quantity is 4.46 mg/g;
FIG. 5 is a graph illustrating the effect of the addition of the adsorbent on methylene blue adsorption, wherein the addition of the adsorbent is increased from 20mg to 40mg, the methylene blue removal rate is rapidly increased from 86.32% to 98.83%, and then the removal rate is rapidly decreased while the addition of the adsorbent is continuously increased. Comprehensively considering the adsorption quantity of the Calligonum mongolicum and the water-solubility removal rate of methylene blue, and preferably selecting the adsorption dosage of 40 mg;
FIG. 6 is a graph for investigating the influence of the initial concentration of methylene blue on methylene blue adsorption, wherein the initial concentration of methylene blue is increased from 4 mg/L to 8 mg/L, the removal rate of methylene blue is gradually increased from 88.37% to 96.73%, then the initial concentration of methylene blue is continuously increased, the removal rate is slowly increased and tends to adsorption equilibrium, and the removal rate is 97.24% when the initial concentration is 10 mg/L;
FIG. 7 shows the influence of the oscillation time on the methylene blue adsorption, from which the removal rate can be seen, the change curve along with time can be roughly divided into 3 stages, namely a fast adsorption stage before 60min and a slow adsorption stage after 60-120 min; thereafter, the removal rate did not change significantly with increasing contact time. After adsorption equilibrium, the maximum adsorption rate reaches 92.23%.
Detailed Description
Example 1
a. Collecting the branches of the pickled Calligonum mongolicum in the field, drying in the sun, and washing with double distilled water to remove sand, dust and soluble impurities;
b. c, drying the soaked Calligonum mongolicum branches treated in the step a for 4 hours at the temperature of 90 ℃ in an oven;
c. grinding the Calligonum mongolicum branches obtained in the step b into powder by a grinder, sieving the powder by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, drying the powder in an oven at the temperature of 70 ℃ for 1 hour to obtain the Calligonum mongolicum biological adsorbent, and storing the Calligonum mongolicum branch biological adsorbent in a sealed glass bottle.
Example 2
a. Collecting the branches of the pickled Calligonum mongolicum in the field, drying in the sun, and washing with double distilled water to remove sand, dust and soluble impurities;
b. drying the soaked Calligonum mongolicum branches treated in the step a for 5 hours in an oven at the temperature of 100 ℃;
c. and c, grinding the Calligonum mongolicum branches obtained in the step b into powder by a grinder, sieving the powder by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, drying the powder in an oven at the temperature of 80 ℃ for 2 hours to obtain the Calligonum mongolicum biological adsorbent, and storing the Calligonum mongolicum branch biological adsorbent in a sealed glass bottle.
Example 3
a. Collecting the branches of the pickled Calligonum mongolicum in the field, drying in the sun, and washing with double distilled water to remove sand, dust and soluble impurities;
b. c, drying the soaked Calligonum mongolicum branches treated in the step a for 6 hours at the temperature of 95 ℃ in an oven;
c. and c, grinding the Calligonum mongolicum branches obtained in the step b into powder by a grinder, sieving the powder by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, drying the powder in an oven at the temperature of 90 ℃ for 3 hours to obtain the Calligonum mongolicum biological adsorbent, and storing the Calligonum mongolicum branch biological adsorbent in a sealed glass bottle.
Example 4
Taking a methylene blue solution 25m L of 4-10 mg/L into a 50m L conical flask, adding 100mg of any Calligonum rubicundunm biological adsorbent obtained in example 1-3, placing the Calligonum rubicundunm biological adsorbent in an orbital oscillator, oscillating the Calligonum rubicundunm biological adsorbent at the rotating speed of 300r/min under 298K, taking supernatant after mixing and contacting, measuring the concentration of the treated methyl blue wastewater by a spectrophotometer and calculating the removal rate, and the result shows that the removal rate of the methylene blue fuel exceeds 98 percent and the unit adsorption amount exceeds 12.35 mg/g.
The invention provides the Calligonum mongolicum biological adsorbent which is low in cost, high in adsorption capacity, easy to obtain and environment-friendly and application thereof, and provides technical support for large-scale application of the Calligonum mongolicum biological adsorbent in a dye wastewater treatment process. Solves the defects of high chemical reagent cost, inconvenient operation and the like in the traditional chemical treatment.
Claims (2)
1. A preparation method of Calligonum mongolicum biological adsorbent is characterized by comprising the following steps:
a. collecting the branches of the pickled Calligonum mongolicum in the field, drying in the sun, and washing with double distilled water to remove sand, dust and soluble impurities;
b. b, drying the soaked Calligonum mongolicum branches treated in the step a for 4-6 hours in an oven at the temperature of 90-100 ℃;
c. grinding the Calligonum mongolicum branches obtained in the step b into powder by a grinder, sieving the powder by a 40-mesh sieve to obtain Calligonum mongolicum branch powder, drying the powder in an oven at the temperature of 70-90 ℃ for 1-3 hours to obtain the Calligonum mongolicum biological adsorbent, and storing the Calligonum mongolicum branch biological adsorbent in a sealed glass bottle.
2. Use of the Calligonum mongolicum biosorbent obtained by the method of claim 1 in the treatment of wastewater for preparing methylene blue dye.
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Application publication date: 20200731 |