CN115138338A - Algae adsorbent and preparation method and application thereof - Google Patents
Algae adsorbent and preparation method and application thereof Download PDFInfo
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- CN115138338A CN115138338A CN202210875498.0A CN202210875498A CN115138338A CN 115138338 A CN115138338 A CN 115138338A CN 202210875498 A CN202210875498 A CN 202210875498A CN 115138338 A CN115138338 A CN 115138338A
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- 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
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/46—Materials comprising a mixture of inorganic and organic materials
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention belongs to the technical field of biological adsorbents, and provides an algae adsorbent and a preparation method and application thereof. The algae adsorbent provided by the invention comprises the following components in parts by weight: 20-30 parts of straw fiber powder, 30-60 parts of algae powder, 5-10 parts of sodium alginate, 5-10 parts of sodium humate, 10-20 parts of nano ferroferric oxide, 1-5 parts of adhesive and 300-500 parts of water. The algae adsorbent prepared by the invention has stronger adsorption capacity and can effectively remove COD (chemical oxygen demand) and heavy metals in the wastewater.
Description
Technical Field
The invention relates to the technical field of biological adsorbents, and particularly relates to an algae adsorbent and a preparation method and application thereof.
Background
The water body is one of the most important natural resources for human survival, is an important component of the human ecological environment, is a storage of the material biogeochemical cycle, and has certain sensitivity to the environment. In recent years, with the acceleration of urbanization and the rapid development of agriculture and industry, water pollution is becoming more serious, so wastewater treatment becomes one of the hot spots of research.
At present, the common wastewater treatment is a physical method, a chemical method and a biological method. The biological adsorption method in the biological method is to remove heavy metals and organic matters in the water body by utilizing the unique structure of the adsorbent, and has the characteristics of large treatment capacity, low cost and the like. On the other hand, as one of the adsorbents, biomass adsorbent materials are widely paid attention by researchers due to their characteristics of low cost, easy availability, and reproducibility. For example, algae have a strong adsorption capacity for most heavy metals. Some macroalgae, whose adsorption capacity is much higher than other kinds of organisms and even higher than that of active carbon and natural zeolite, are comparable to ion exchange resins. However, the existing algae adsorbents have a single adsorption function, a small adsorption amount, and a large adsorption capacity due to environmental influences.
Therefore, how to provide an algae adsorbent with better performance becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an algae adsorbent, and a preparation method and an application thereof, and aims to solve the technical problems that the existing algae adsorbent is single in adsorption function, small in adsorption quantity, large in influence of environment on adsorption capacity and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an algae adsorbent which comprises the following components in parts by weight:
20-30 parts of straw fiber powder, 30-60 parts of algae powder, 5-10 parts of sodium alginate, 5-10 parts of sodium humate, 10-20 parts of nano ferroferric oxide, 1-5 parts of adhesive and 300-500 parts of water.
Further, the algae powder comprises chlorella powder, black spore powder and agar powder, wherein the mass ratio of the chlorella powder to the black spore powder to the agar powder is 1-3: 1 to 3:1 to 3.
Further, the grain size of the straw fiber powder is 30-100 meshes, the grain size of the algae powder is 30-100 meshes, and the grain size of the nano ferroferric oxide is 50-200 nm; the adhesive is starch, dextrin or polyvinyl alcohol.
The invention provides a preparation method of the algae adsorbent, which comprises the following steps:
s1, exposing algae to the sun for 1-2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution to obtain an algae soaking solution;
s2, mixing the algae soaking solution with a ferrous sulfate solution and a hydrogen peroxide solution to obtain an algae treatment solution, and centrifuging and drying the algae treatment solution to obtain algae powder;
and S3, mixing the straw fiber powder, the algae powder, sodium alginate, sodium humate, nano ferroferric oxide, an adhesive and water to obtain a mixed solution, and sequentially centrifuging, drying and grinding the mixed solution to obtain the algae adsorbent.
Further, the preparation method of the straw fiber powder comprises the following steps: cutting and crushing straws to obtain straw fibers with the particle size of 0.3-0.8 mm, and sequentially carrying out alkali treatment, washing, drying and grinding on the straw fibers to obtain straw fiber powder;
the straw is one or more of corn straw, rice straw and wheat straw.
Further, the alkaline solution used in the alkaline treatment is a sodium hydroxide solution with the mass fraction of 5-15%, the alkaline solution only needs to submerge the straw fibers, and the alkaline treatment time is 1-3 hours.
Further, in the step S1, the pH value of the acetic acid-sodium acetate buffer solution is 3-6, and the acetic acid-sodium acetate buffer solution only needs to cover the algae;
in the step S2, the ferrous sulfate solution accounts for 10-30% by mass, and the addition amount accounts for 20-40% by mass of the algae soaking solution; the mass fraction of the hydrogen peroxide solution is less than or equal to 3 percent, and the addition amount is 5 to 10 percent of the mass of the algae soaking solution.
Further, the mixing temperature in the step S3 is 25-40 ℃, and the mixing time is 1-2 h.
Furthermore, the rotation speed of the centrifugation in the step S2 and the step S3 is 5000-8000 rpm independently, and the centrifugation time is 8-15 min independently.
The invention also provides application of the algae adsorbent in wastewater treatment.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the algae powder used in the present invention contains a large amount of-NH 2 、-OH、-COOH、-PO 4 3- Active groups such as the like are easy to generate acting forces such as complexation, hydrogen bond and the like with organic pollutants, and COD in the wastewater can be effectively removed;
2. the algae powder used by the invention has more internal functional groups exposed to be combined with metal ions, so that the effect of treating the heavy metal wastewater is better;
3. the straw fiber powder used in the invention can provide more active groups, and the adsorption capacity of the algae adsorbent is improved;
4. the raw materials used in the invention are cheap and easy to obtain, and the prepared algae adsorbent has the advantages of large adsorption capacity, good selectivity, non-harsh application conditions and the like;
5. the pretreatment step of the algae powder can expose a large number of adsorption sites of the algae powder, and obviously improve the adsorption quantity of the adsorbent;
6. the technical scheme provided by the invention is simple and easy to implement, has strong operability and is convenient to popularize and apply in practice.
Detailed Description
The invention provides an algae adsorbent which comprises the following components in parts by weight:
20-30 parts of straw fiber powder, 30-60 parts of algae powder, 5-10 parts of sodium alginate, 5-10 parts of sodium humate, 10-20 parts of nano ferroferric oxide, 1-5 parts of adhesive and 300-500 parts of water.
In the present invention, the components and the amounts of the algae adsorbent are preferably: 22-28 parts of straw fiber powder, 35-55 parts of algae powder, 6-9 parts of sodium alginate, 6-9 parts of sodium humate, 12-18 parts of nano ferroferric oxide, 2-4 parts of an adhesive and 350-480 parts of water.
In the present invention, the components and the amounts of the algae adsorbent are further preferably: 24-26 parts of straw fiber powder, 40-50 parts of algae powder, 7-8 parts of sodium alginate, 7-8 parts of sodium humate, 14-17 parts of nano ferroferric oxide, 3 parts of adhesive and 400-450 parts of water.
In the invention, the algae powder comprises chlorella powder, black spore powder and agar powder, wherein the mass ratio of the chlorella powder to the black spore powder to the agar powder is (1-3): 1 to 3:1 to 3, preferably 1.
In the invention, the particle size of the straw fiber powder is 30-100 meshes, preferably 40-80 meshes, and more preferably 50-70 meshes; the particle size of the algae powder is 30 to 100 meshes, preferably 40 to 80 meshes, and more preferably 50 to 70 meshes; the particle size of the nano ferroferric oxide is 50-200 nm, preferably 80-180 nm, and further preferably 120-150 nm; the adhesive is starch, dextrin or polyvinyl alcohol, preferably starch or dextrin, and more preferably starch.
In the present invention, the particle size of the algae adsorbent is 100 to 200 mesh, preferably 120 to 180 mesh, and more preferably 140 to 160 mesh.
The invention provides a preparation method of the algae adsorbent, which comprises the following steps:
s1, exposing algae to the sun for 1-2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution to obtain an algae soaking solution;
s2, mixing the algae soaking solution with a ferrous sulfate solution and a hydrogen peroxide solution to obtain an algae treatment solution, and centrifuging and drying the algae treatment solution to obtain algae powder;
and S3, mixing the straw fiber powder, the algae powder, sodium alginate, sodium humate, nano ferroferric oxide, an adhesive and water to obtain a mixed solution, and sequentially centrifuging, drying and grinding the mixed solution to obtain the algae adsorbent.
In the invention, the preparation method of the straw fiber powder comprises the following steps: cutting and crushing straws to obtain straw fibers with the particle size of 0.3-0.8 mm, and sequentially carrying out alkali treatment, washing, drying and grinding on the straw fibers to obtain straw fiber powder; the grain diameter of the straw fiber is preferably 0.4-0.6 mm, and more preferably 0.5mm;
the straws are one or more of corn straws, rice straws and wheat straws, and preferably the rice straws and/or the wheat straws.
In the invention, the alkaline solution used in the alkaline treatment is a sodium hydroxide solution with the mass fraction of 5-15%, the alkaline solution only needs to submerge the straw fiber, and the alkaline treatment time is 1-3 h; the mass fraction of the sodium hydroxide solution is preferably 7 to 13%, and more preferably 8 to 12%; the time for the alkali treatment is preferably 1.5 to 2.5 hours, and more preferably 2 hours.
In the present invention, in step S1, the pH value of the acetic acid-sodium acetate buffer is 3 to 6, preferably 4 to 5; the acetic acid-sodium acetate buffer solution is only needed to cover the algae;
in the step S2, the ferrous sulfate solution has a mass fraction of 10 to 30%, preferably 15 to 25%, and more preferably 18 to 22%, and an addition amount of 20 to 40%, preferably 22 to 36%, and more preferably 27 to 33% of the mass of the algae soaking solution;
the mass fraction of the hydrogen peroxide solution is less than or equal to 3 percent, preferably less than or equal to 2 percent, and more preferably less than or equal to 1 percent; the amount of the additive is 5 to 10%, preferably 6 to 9%, and more preferably 7 to 8% by mass of the algae-soaking solution.
In the present invention, the mixing temperature in the step S3 is 25 to 40 ℃, preferably 28 to 36 ℃, and more preferably 30 to 32 ℃; the mixing time is 1 to 2 hours, preferably 1.5 hours.
In the present invention, the rotation speed of the centrifugation in step S2 and step S3 is 5000 to 8000rpm, preferably 6000 to 7500rpm, and more preferably 7000rpm independently; the time for centrifugation is independently 8 to 15min, preferably 9 to 13min, and more preferably 10 to 12min.
The invention also provides application of the algae adsorbent in wastewater treatment.
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The raw materials used in this example were as follows: 25 parts of straw fiber powder, 40 parts of algae powder, 8 parts of sodium alginate, 7 parts of sodium humate, 14 parts of nano ferroferric oxide, 4 parts of starch and 400 parts of water.
Exposing algae to the sun for 2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution (pH = 5) to obtain an algae soaking solution; mixing the algae soaking solution with a ferrous sulfate solution (with the concentration of 15%) and a hydrogen peroxide solution (with the concentration of 2%) to obtain an algae treating solution, wherein the addition amount of the ferrous sulfate solution is 40% of the mass of the algae soaking solution, and the addition amount of the hydrogen peroxide solution is 6% of the mass of the algae soaking solution; centrifuging the algae treatment solution at 7000rpm for 10min, and drying the solid at 70 deg.C for 1 hr to obtain algae powder.
Stirring and mixing straw fiber powder, algae powder, sodium alginate, sodium humate, nano ferroferric oxide, starch and water at 30 ℃ for 1h to obtain a mixed solution, centrifuging the mixed solution at 7000rpm for 10min, drying the solid at 70 ℃ for 1h, and grinding to obtain the algae adsorbent.
Example 2
The raw materials used in this example were as follows: 22 parts of straw fiber powder, 50 parts of algae powder, 7 parts of sodium alginate, 8 parts of sodium humate, 16 parts of nano ferroferric oxide, 3 parts of starch and 500 parts of water.
Exposing algae to sunlight for 1 day, pulverizing, sieving, and soaking in acetic acid-sodium acetate buffer solution (pH = 4) to obtain algae soaking solution; mixing the algae soaking solution with a ferrous sulfate solution (with the concentration of 20%) and a hydrogen peroxide solution (with the concentration of 1%) to obtain an algae treatment solution, wherein the addition amount of the ferrous sulfate solution is 30% of the mass of the algae soaking solution, and the addition amount of the hydrogen peroxide solution is 7% of the mass of the algae soaking solution; centrifuging the algae treatment solution at 6000rpm for 12min, and drying the solid at 70 deg.C for 1 hr to obtain algae powder.
Stirring and mixing straw fiber powder, algae powder, sodium alginate, sodium humate, nano ferroferric oxide, starch and water at 25 ℃ for 2 hours to obtain a mixed solution, centrifuging the mixed solution at 6000rpm for 12 minutes, drying the solid at 70 ℃ for 1 hour, and grinding to obtain the algae adsorbent.
Example 3
The raw materials used in this example were as follows: 24 parts of straw fiber powder, 30 parts of algae powder, 6 parts of sodium alginate, 9 parts of sodium humate, 12 parts of nano ferroferric oxide, 2 parts of starch and 350 parts of water.
Exposing algae to the sun for 2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution (pH = 5) to obtain an algae soaking solution; mixing the algae soaking solution with a ferrous sulfate solution (with the concentration of 25%) and a hydrogen peroxide solution (with the concentration of 2%) to obtain an algae treating solution, wherein the addition amount of the ferrous sulfate solution is 35% of the mass of the algae soaking solution, and the addition amount of the hydrogen peroxide solution is 9% of the mass of the algae soaking solution; centrifuging the algae treatment solution at 7000rpm for 12min, and drying the solid at 70 deg.C for 1 hr to obtain algae powder.
Stirring and mixing straw fiber powder, algae powder, sodium alginate, sodium humate, nano ferroferric oxide, starch and water at 30 ℃ for 1h to obtain a mixed solution, centrifuging the mixed solution at 7000rpm for 12min, drying the solid at 70 ℃ for 1h, and grinding to obtain the algae adsorbent.
Example 4
The raw materials used in this example were as follows: 28 parts of straw fiber powder, 45 parts of algae powder, 6 parts of sodium alginate, 10 parts of sodium humate, 17 parts of nano ferroferric oxide, 4 parts of dextrin and 400 parts of water.
Exposing algae to sunlight for 1 day, pulverizing, sieving, and soaking in acetic acid-sodium acetate buffer solution (pH = 6) to obtain algae soaking solution; mixing the algae soaking solution with a ferrous sulfate solution (with the concentration of 30%) and a hydrogen peroxide solution (with the concentration of 3%) to obtain an algae treatment solution, wherein the addition amount of the ferrous sulfate solution is 25% of the mass of the algae soaking solution, and the addition amount of the hydrogen peroxide solution is 5% of the mass of the algae soaking solution; centrifuging the algae treatment solution at 7000rpm for 10min, and drying the solid at 70 deg.C for 1 hr to obtain algae powder.
Stirring and mixing straw fiber powder, algae powder, sodium alginate, sodium humate, nano ferroferric oxide, dextrin and water at 30 ℃ for 1h to obtain a mixed solution, centrifuging the mixed solution at 7000rpm for 10min, drying the solid at 70 ℃ for 1h, and grinding to obtain the algae adsorbent.
Example 5
The raw materials used in this example were as follows: 30 parts of straw fiber powder, 40 parts of algae powder, 9 parts of sodium alginate, 7 parts of sodium humate, 15 parts of nano ferroferric oxide, 4 parts of polyvinyl alcohol and 400 parts of water.
Exposing algae to the sun for 2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution (pH = 3) to obtain an algae soaking solution; mixing the algae soaking solution with a ferrous sulfate solution (with the concentration of 20%) and a hydrogen peroxide solution (with the concentration of 1.5%) to obtain an algae treating solution, wherein the addition amount of the ferrous sulfate solution is 20% of the mass of the algae soaking solution, and the addition amount of the hydrogen peroxide solution is 10% of the mass of the algae soaking solution; centrifuging the algae treatment solution at 7000rpm for 10min, and drying the solid at 70 deg.C for 1 hr to obtain algae powder.
Stirring and mixing straw fiber powder, algae powder, sodium alginate, sodium humate, nano ferroferric oxide, polyvinyl alcohol and water at 30 ℃ for 1h to obtain a mixed solution, centrifuging the mixed solution at 7000rpm for 10min, drying the solid at 70 ℃ for 1h, and grinding to obtain the algae adsorbent.
Performance testing
The algae adsorbent prepared in examples 1 to 5 was applied to high-concentration organic wastewater at room temperature, and the thermal treatment wastewater discharged from a certain company was taken, adjusted to pH 7, and measured according to the standard "HJ828-2017 water quality-determination of chemical oxygen demand — dichromate method" to have a COD value of 4580mg/L, and at room temperature, the adsorption material was applied to a substrate in a mass-to-volume ratio of 1g:2L, adding algae adsorbent, stirring for 30min, standing for 20min, filtering, measuring COD value of the filtrate, calculating removal rate, and the adsorption result is shown in Table 1.
TABLE 1 test results of COD treatment by the algae adsorbents of examples 1 to 5
From table 1, the algae adsorbent prepared by the invention can treat high-concentration organic wastewater, and the removal rate of COD in the wastewater is more than 98%, which shows that the algae adsorbent has excellent adsorption effect.
Preparing 5L of heavy metal wastewater simulation water sample, wherein the pH value of the wastewater is 6, and the initial concentration of metal ions is Cd 2+ 200mg/L, zn 2+ 150mg/L of Pb 2+ Is 500mg/L, cu 2+ 50mg/L, and adding the mixture into the mixture at room temperature according to the mass-volume ratio of 1g:2L of the algae adsorbent prepared by the invention is added, mixed and stirred for 30min, kept stand for 20min, filtered and separated, and the concentration of metal ions in the filtrate is measured by an atomic absorption spectrophotometer and is shown in Table 2.
TABLE 2 test results of heavy metal adsorption by the algae adsorbents of examples 1 to 5
From table 2, the algae adsorbent prepared by the present invention has a strong adsorption effect on heavy metal ions.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The algae adsorbent is characterized by comprising the following components in parts by weight:
20-30 parts of straw fiber powder, 30-60 parts of algae powder, 5-10 parts of sodium alginate, 5-10 parts of sodium humate, 10-20 parts of nano ferroferric oxide, 1-5 parts of adhesive and 300-500 parts of water.
2. The algae adsorbent of claim 1, wherein the algae powder comprises chlorella powder, black spore powder and agar powder, and the mass ratio of the chlorella powder to the black spore powder to the agar powder is 1-3: 1 to 3:1 to 3.
3. The algae adsorbent of claim 2, wherein the straw fiber powder has a particle size of 30-100 meshes, the algae powder has a particle size of 30-100 meshes, and the nano ferroferric oxide has a particle size of 50-200 nm; the adhesive is starch, dextrin or polyvinyl alcohol.
4. The method for preparing the algae adsorbent according to any one of claims 1 to 3, comprising the steps of:
s1, exposing algae to the sun for 1-2 days, crushing, sieving, and soaking in an acetic acid-sodium acetate buffer solution to obtain an algae soaking solution;
s2, mixing the algae soaking solution with a ferrous sulfate solution and a hydrogen peroxide solution to obtain an algae treatment solution, and centrifuging and drying the algae treatment solution to obtain algae powder;
and S3, mixing the straw fiber powder, the algae powder, sodium alginate, sodium humate, nano ferroferric oxide, an adhesive and water to obtain a mixed solution, and sequentially centrifuging, drying and grinding the mixed solution to obtain the algae adsorbent.
5. The preparation method of claim 4, wherein the preparation method of the straw fiber powder comprises the following steps: cutting and crushing straws to obtain straw fibers with the particle size of 0.3-0.8 mm, and sequentially carrying out alkali treatment, washing, drying and grinding on the straw fibers to obtain straw fiber powder;
the straw is one or more of corn straw, rice straw and wheat straw.
6. The preparation method according to claim 5, wherein the alkali solution used in the alkali treatment is a sodium hydroxide solution with the mass fraction of 5-15%, the alkali solution only needs to submerge the straw fiber, and the time of the alkali treatment is 1-3 h.
7. The method according to claim 4, wherein in step S1, the pH of the acetic acid-sodium acetate buffer solution is 3 to 6, and the acetic acid-sodium acetate buffer solution is immersed in the algae;
in the step S2, the ferrous sulfate solution accounts for 10-30% by mass, and the addition amount accounts for 20-40% by mass of the algae soaking solution; the mass fraction of the hydrogen peroxide solution is less than or equal to 3 percent, and the addition amount is 5 to 10 percent of the mass of the algae soaking solution.
8. The method according to claim 4 or 6, wherein the mixing temperature in step S3 is 25-40 ℃ and the mixing time is 1-2 hours.
9. The method according to claim 7, wherein the rotation speed of the centrifugation in step S2 and step S3 is 5000 to 8000rpm independently, and the time of the centrifugation is 8 to 15min independently.
10. Use of the algae adsorbent of any one of claims 1 to 3 for treating wastewater.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115160677A (en) * | 2022-08-18 | 2022-10-11 | 甘肃宏鑫农业科技有限公司 | Agricultural mulching film for high-standard farmland and preparation method thereof |
| CN117866937A (en) * | 2023-12-04 | 2024-04-12 | 广东顺控自华科技有限公司 | Modified zeolite immobilized algae balls and preparation method and application thereof |
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