CN103657593A - Sunflower husk biomass carbon adsorbent, preparation method and method for removing methylene blue from water - Google Patents
Sunflower husk biomass carbon adsorbent, preparation method and method for removing methylene blue from water Download PDFInfo
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- CN103657593A CN103657593A CN201310686422.4A CN201310686422A CN103657593A CN 103657593 A CN103657593 A CN 103657593A CN 201310686422 A CN201310686422 A CN 201310686422A CN 103657593 A CN103657593 A CN 103657593A
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Abstract
The invention discloses a sunflower husk biomass carbon adsorbent, a preparation method and a method for removing methylene blue from water, and belongs to the technical field of wastewater treatment. The sunflower husk biomass carbon adsorbent is prepared by the following steps: washing sunflower husks by water, drying, crushing, and screening to 300-600 microns; mixing sunflower husk granules with a zinc chloride solution for impregnating, and performing microwave treatment; washing obtained sunflower husk biomass carbon with acid and water, and drying to obtain the sunflower husk biomass carbon adsorbent. The sunflower husk biomass carbon adsorbent is used in the method for removing methylene blue from water; the preparation method is easy to operate, low in cost, high in efficiency and environment-friendly.
Description
Technical field
The invention belongs to technical field of waste water processing, relate to a kind of method of utilizing adsorbent to remove waste water Methylene Blue, particularly relate to a kind of method of utilizing sunflower seed shell biomass carbon adsorbent to remove waste water Methylene Blue.
Background technology
Methylene blue is a kind of heteroaromatic compound, belong to phenothiazines basic-dyeable fibre, be usually used in the painted of the dyeing of fiber crops, silk fabric, paper and bamboo and wood, can be used for manufacturing ink and the aspects such as dyeing biological, bacterium tissue, also can be used as chemical indicator and medicine.The a large amount of methylene blue of acute absorption can cause heart rate increase, vomiting, shock and quadriplegia etc.In addition, the symptom that the methylene blue of high dose also can cause Heng Shi corpusculum anaemia or other red cell morphologies to change, reduces red blood cell life span.
Biomass carbon, refers to a kind of living beings that generated by cracking or imperfect combustion by the living beings that are rich in carbon.Biomass carbon has larger specific area, and more oxygen-content active functional group is contained on surface, can be for organic pollution and the heavy metal in absorption sewage or soil, the while is with low cost because of it, is considered to a kind of sorbing material that has broad prospect of application.With carbon containing debirs such as agriculture and forestry organic waste material, trade wastes, prepare biomass carbon and not only can reduce the environmental pollution of solid waste, can also effectively realize the resource of these debirs.
Sunflower seeds is one of the world five large oil crops.China is the big producing country of sunflower seeds, and 2011 annual productions are 231.3 ten thousand tons.Current sunflower seeds the most widely purposes is to sell as a kind of parched medicinal material, is also the most traditional a kind of purposes.Along with scientific and technological progress and the development of food industry, people continually develop the edible and economic worth that sunflower seeds is new, and such as utilizing polly seed nucleole oil expression and making the products such as health products beverage, yogurt, sunflower seeds grouts can be used as feed etc.Yet, all the time fewer to utilizing of sunflower seed shell, except doing fuel, be mostly directly used as discarded object and thrown away.Sunflower seeds shell-containing rate is generally 22～40%, take 2011 as example, and the annual production of sunflower seed shell is 50.9～92.5 ten thousand tons.If utilize it to prepare adsorbent, not only can turn waste into wealth, and can alleviate the pollution that sunflower seed shell causes, realized resource and the economic worth of sunflower seed shell simultaneously.Utilize the methylene blue in sunflower seed shell charcoal sorbent treatment waste water, can effectively remove the methylene blue in waste water, also reached the effect of the treatment of wastes with processes of wastes against one another.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of adsorbent of removing efficiently, cheaply waste water Methylene Blue.
Second technical problem to be solved by this invention is to provide a kind of method of removing efficiently, cheaply waste water Methylene Blue.
A sunflower seed shell biomass carbon adsorbent, for the sunflower seed shell of microwave treatment is as adsorbent.
The preparation method of above-mentioned sunflower seed shell biomass carbon adsorbent comprises the following steps:
With running water, clean sunflower seed shell, dry, broken, be sized to 300～600 μ m, again by sunflower seed shell particle and liquor zinci chloridi hybrid infusion, microwave treatment, with hydrochloric acid solution pickling gained sunflower seed shell biomass carbon, then cleans to pH and is neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
The concentration of above-mentioned liquor zinci chloridi preferably 55%～75%, the preferred sunflower seed shell particle of impregnating ratio (g) of sunflower seed shell particle and liquor zinci chloridi: liquor zinci chloridi (g) is 1:5～1:7, microwave power is 480～640W preferably, microwave treatment time is 10～15min preferably, the concentration of hydrochloric acid solution preferably 10%.
Sunflower seed shell biomass carbon adsorbent described above, for removing the method for waste water Methylene Blue, comprises the following steps:
Adding sunflower seed shell biomass carbon adsorbent and sodium chloride containing in the solution of methylene blue, at 20～60 ℃, adsorb after 2～24h, isolated by filtration, filtrate is adjusted to neutral rear discharge.
Compared with prior art, the invention has the advantages that: the method such as, precipitation separated with ion-exchange, film is compared, and the method for removal waste water Methylene Blue of the present invention is simple to operate, and cost is low, high-efficiency environment friendly.Sunflower seed shell biomass carbon adsorbent adsorbance of the present invention is large, methylene blue adsorption value is 384.64mg/g, Wooden activated carbon for water purification national standard (the 135mg/g that surpasses far away, State Standard of the People's Republic of China GB13803.2-1999), opened up the new way of sunflower seed shell recycling simultaneously.
Accompanying drawing explanation
Fig. 1 is the impact of pH on methylene blue removal effect.
Fig. 2 is the impact of methylene blue initial concentration on methylene blue removal effect.
Fig. 3 is the impact of sodium chloride concentration on methylene blue removal effect.
Fig. 4 is Langmuir adsorption isotherm.
Fig. 5 is the infrared spectrogram of sunflower seed shell biomass carbon adsorbent of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but the present invention is not restricted to embodiment.
Get the sunflower seed shell of certain mass, running water rinses for several times, dry, broken, be sized to 300～600 μ m, by sunflower seed shell particle and liquor zinci chloridi according to sunflower seed shell granular mass (g): the ratio hybrid infusion that liquor zinci chloridi quality (g) is 1:7 is in conical flask, and wherein the concentration of liquor zinci chloridi is 55%.After 480W microwave treatment 15min, the hydrochloric acid solution pickling gained sunflower seed shell biomass carbon that is 10% by concentration, then clean to pH and be neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
Getting adsorbent and 5g sodium chloride prepared by 0.1g the present embodiment adds pH to be respectively 2,4,6,7,8,10,12,50mL in the methylene blue solution of 100mg/L, vibrates after 2h in water bath with thermostatic control shaking table at 20 ℃, isolated by filtration, filtrate is adjusted to neutral rear discharge.
Different initial pH on the impact of methylene blue removal effect as shown in Figure 1, can find out that pH is very little on the impact of methylene blue adsorption value, illustrate that the method for removal methylene blue of the present invention is not limited by pH substantially.
Get the sunflower seed shell of certain mass, running water rinses for several times, dry, broken, be sized to 300～600 μ m, by sunflower seed shell particle and liquor zinci chloridi according to sunflower seed shell granular mass (g): the ratio hybrid infusion that liquor zinci chloridi quality (g) is 1:6.5 is in conical flask, and wherein the concentration of liquor zinci chloridi is 60%.After 520W microwave treatment 14min, the hydrochloric acid solution pickling gained sunflower seed shell biomass carbon that is 10% by concentration, then clean to pH and be neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
Get that adsorbent prepared by 0.15g the present embodiment and 2.5g sodium chloride add respectively containing 100,300,500,700, in the 50mL solution of 900mg/L methylene blue, at 20 ℃, in water bath with thermostatic control shaking table, vibrate after 24h, isolated by filtration, filtrate be adjusted to neutral after discharge.
Methylene blue initial concentration on the impact of methylene blue removal effect as shown in Figure 2.Under the driving of concentration gradient, along with methylene blue initial concentration is increased to 700mg/L by 100mg/L, methylene blue adsorption value rises to 343.27mg/g by 51.21mg/g, and clearance only drops to 97.60% by 99.82%.When methylene blue initial concentration is 900mg/L, methylene blue adsorption value is 392.80mg/g, and clearance is 87.45%.This shows that the method for removal methylene blue of the present invention is applicable to the wastewater treatment containing 100～700mg/L methylene blue.
Get the sunflower seed shell of certain mass, running water rinses for several times, dry, broken, be sized to 300～600 μ m, by sunflower seed shell particle and liquor zinci chloridi according to sunflower seed shell granular mass (g): the ratio hybrid infusion that liquor zinci chloridi quality (g) is 1:6 is in conical flask, and wherein the concentration of liquor zinci chloridi is 65%.After 560W microwave treatment 13min, the hydrochloric acid solution pickling gained sunflower seed shell biomass carbon that is 10% by concentration, then clean to pH and be neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
Getting adsorbent 0.20g prepared by the present embodiment adds sodium chloride to make its mass percent concentration be respectively 0%, 2%, 5%, 10%, 15%, 30%, in the methylene blue solution of 50mL, 100mg/L, at 20 ℃, in water bath with thermostatic control shaking table, vibrate after 2h, isolated by filtration, filtrate is adjusted to neutral rear discharge.
Sodium chloride concentration on the impact of methylene blue removal effect as shown in Figure 3.When sodium chloride concentration is higher, (15% and 30%) rate of adsorption is very fast, but different sodium chloride concentrations are not remarkable on the impact of adsorbance, sunflower seed shell biomass carbon adsorbent can (0%～30%) be realized the Adsorption to methylene blue within the scope of wider sodium chloride concentration.
Get the sunflower seed shell of certain mass, running water rinses for several times, dry, broken, be sized to 300～600 μ m, by sunflower seed shell particle and liquor zinci chloridi according to sunflower seed shell granular mass (g): the ratio hybrid infusion that liquor zinci chloridi quality (g) is 1:5.5 is in conical flask, and wherein the concentration of liquor zinci chloridi is 70%.After 600W microwave treatment 12min, the hydrochloric acid solution pickling gained sunflower seed shell biomass carbon that is 10% by concentration, then clean to pH and be neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
Get adsorbent and 2.5g sodium chloride prepared by 0.25g the present embodiment and join 50mL respectively containing 100,300,500,700, in the solution of 900mg/L methylene blue, in 20 ℃, 40 ℃, at 60 ℃, in water bath with thermostatic control shaking table, vibrate after 21h, isolated by filtration, filtrate is adjusted to neutral rear discharge.
Langmuir adsorption isotherm matching for absorption result, as shown in Figure 4, fitting result is as shown in table 1 for the adsorption isotherm under different temperatures.
From Fig. 4 and table 1, can find out, Langmuir model is fine to the fitting effect of the isothermal adsorption test data of methylene blue to sunflower seed shell biomass carbon adsorbent, so Langmuir model can be described the isothermal adsorption test data of sunflower seed shell biomass carbon adsorbent to methylene blue well.As can be seen from Table 1, Q0 and b all decline along with the rising of temperature, this surface-active that shows sunflower seed shell biomass carbon adsorbent declines along with the rising of temperature, under cryogenic conditions, have higher compatibility with methylene blue molecule, sunflower shell biomass carbon adsorbent adsorption effect to methylene blue under cryogenic conditions is better.Showing that technological process of the present invention is low to operating condition and equipment requirement, is the wastewater containing methylene blue processing method of a kind of economy, the saving energy, is suitable for propagation and employment.
In the time of 20 ℃, the maximum mono layer adsorption amount Q of the sunflower seed shell biomass carbon adsorbent absorption methylene blue calculating with Langmuir thermoisopleth
0384.62mg/g, Wooden activated carbon for water purification national standard (the 135mg/g that surpasses far away, State Standard of the People's Republic of China GB13803.2-1999), illustrate that modification sunflower seed shell of the present invention can be used as the adsorbent of a kind of high efficiency, low cost of processing wastewater containing methylene blue.
Table 1Langmuir adsorption isotherm parameter
Get the sunflower seed shell of certain mass, running water rinses for several times, dry, broken, be sized to 300～600 μ m, by sunflower seed shell particle and liquor zinci chloridi according to sunflower seed shell granular mass (g): the ratio hybrid infusion that liquor zinci chloridi quality (g) is 1:5 is in conical flask, and wherein the concentration of liquor zinci chloridi is 75%.After 640W microwave treatment 10min, the hydrochloric acid solution pickling gained sunflower seed shell biomass carbon that is 10% by concentration, then clean to pH and be neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
Sunflower seed shell biomass carbon adsorbent prepared by the present embodiment carries out infrared spectrum analysis.
The infrared spectrogram of sunflower seed shell biomass carbon adsorbent prepared by the present embodiment is shown as Fig. 5.3429cm
-1the stretching vibration of O – H in the absworption peak representation hydroxy at place, 2924cm
-1absworption peak be CH in C – H and cellulose and hemicellulose in aliphatic compound
2stretching vibration overlapping, 1694cm
-1absworption peak vibration of C=O in carbonyl at place causes, 1617cm
-1the absworption peak at place may be the stretching vibration of C=O, 1409cm
-1the absworption peak at place is the coefficient result of deformation vibration of O – H in the symmetrical stretching vibration of C=O in ester and alcohol, 1223cm
-1the absworption peak at place may be C – N(III type amido) stretching vibration causes, 1094cm
-1the absworption peak at place is the stack of the stretching vibration of C – O – C in P – O – C and polysaccharose substance in phosphonyl group, and near the absworption peak of its all band (in figure finger print) is the vibration of phosphonyl group or sulphur group.The above results shows, sunflower seed shell biomass carbon adsorbent surface is rich in hydroxyl, carbonyl isoreactivity group.
Claims (9)
1. a sunflower seed shell biomass carbon adsorbent, is characterized in that, for the sunflower seed shell of microwave treatment is as adsorbent.
2. the preparation method of the sunflower seed shell biomass carbon adsorbent of claim 1, is characterized in that, comprises the following steps:
With running water, clean sunflower seed shell, dry, broken, be sized to 300～600 μ m, again by sunflower seed shell particle and liquor zinci chloridi hybrid infusion, microwave treatment, with hydrochloric acid solution pickling gained sunflower seed shell biomass carbon, then cleans to pH and is neutral with distilled water, dry, obtain sunflower seed shell biomass carbon adsorbent.
3. according to the method for claim 2, it is characterized in that the mass percent concentration of liquor zinci chloridi preferably 55%～75%.
4. according to the method for claim 2, it is characterized in that the preferred sunflower seed shell particle of impregnating ratio (g) of sunflower seed shell particle and liquor zinci chloridi: liquor zinci chloridi (g) is 1:5～1:7.
5. according to the method for claim 2, it is characterized in that, microwave power is 480～640W preferably.
6. according to the method for claim 2, it is characterized in that, microwave treatment time is 10～15min preferably.
7. according to the method for claim 2, it is characterized in that hydrochloric acid solution mass percent concentration preferably 10%.
8. the sunflower seed shell biomass carbon adsorbent of claim 1 is used for removing waste water Methylene Blue.
9. the sunflower seed shell biomass carbon adsorbent of claim 1 is used for removing the method for waste water Methylene Blue,
It is characterized in that, comprise the following steps:
Containing in the solution of methylene blue, adding sunflower seed shell biomass carbon adsorbent and sodium chloride, at 20～60 ℃, adsorb after 2～24h, isolated by filtration, filtrate is adjusted to neutral rear discharge, concentration 100～the 900mg/L, the pH value of solution that contain the Methylene Blue in Solution of methylene blue are 2～12, sunflower seed shell biomass carbon adsorbent consumption is 2～5g/L, and the mass percent concentration of sodium chloride is no more than 30%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163464A (en) * | 2014-08-15 | 2014-11-26 | 北京工业大学 | Method for removing dyes in wastewater by using oil-tea cake |
| CN105080500A (en) * | 2015-05-18 | 2015-11-25 | 江苏大学 | Natural dye wastewater adsorbent and preparation and application method thereof |
| CN107930573A (en) * | 2017-11-29 | 2018-04-20 | 华东交通大学 | One kind removes methylene blue adsorption number agent |
| CN109482155A (en) * | 2018-12-13 | 2019-03-19 | 重庆工商大学 | Preparation method of modified sunflower seed shell biological adsorption agent and products thereof and application |
| CN112263993A (en) * | 2020-10-19 | 2021-01-26 | 大连海事大学 | Boron-phosphorus co-doped activated carbon for adsorption of aromatic ring-containing compound in water and preparation method thereof |
| CN112457853A (en) * | 2020-11-25 | 2021-03-09 | 河南省科学院高新技术研究中心 | Zinc-rich biochar, preparation method thereof and application of zinc-rich biochar in passivation and remediation of heavy metal contaminated soil |
| CN114455585A (en) * | 2022-02-16 | 2022-05-10 | 青海师范大学 | Method for adsorbing carbon dioxide in air |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007111684A (en) * | 2005-10-24 | 2007-05-10 | Ebara Engineering Service Co Ltd | Activated carbon for water treatment, and water treatment method by the activated carbon |
-
2013
- 2013-12-09 CN CN201310686422.4A patent/CN103657593B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007111684A (en) * | 2005-10-24 | 2007-05-10 | Ebara Engineering Service Co Ltd | Activated carbon for water treatment, and water treatment method by the activated carbon |
Non-Patent Citations (2)
| Title |
|---|
| 张曼曼: "核桃壳基活性炭的制备及对水体中孔雀石绿和4-氯苯酚的吸附研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
| 高慧 等: "葵花籽壳制取活性炭的工艺研究", 《林产化学与工业》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163464A (en) * | 2014-08-15 | 2014-11-26 | 北京工业大学 | Method for removing dyes in wastewater by using oil-tea cake |
| CN104163464B (en) * | 2014-08-15 | 2016-05-18 | 北京工业大学 | A kind of method of utilizing Oil-tea-cake to remove Wastewater Dyes |
| CN105080500A (en) * | 2015-05-18 | 2015-11-25 | 江苏大学 | Natural dye wastewater adsorbent and preparation and application method thereof |
| CN107930573A (en) * | 2017-11-29 | 2018-04-20 | 华东交通大学 | One kind removes methylene blue adsorption number agent |
| CN109482155A (en) * | 2018-12-13 | 2019-03-19 | 重庆工商大学 | Preparation method of modified sunflower seed shell biological adsorption agent and products thereof and application |
| CN112263993A (en) * | 2020-10-19 | 2021-01-26 | 大连海事大学 | Boron-phosphorus co-doped activated carbon for adsorption of aromatic ring-containing compound in water and preparation method thereof |
| CN112263993B (en) * | 2020-10-19 | 2023-08-25 | 大连海事大学 | Boron-phosphorus co-doped activated carbon for adsorption of aromatic ring-containing compound in water and preparation method thereof |
| CN112457853A (en) * | 2020-11-25 | 2021-03-09 | 河南省科学院高新技术研究中心 | Zinc-rich biochar, preparation method thereof and application of zinc-rich biochar in passivation and remediation of heavy metal contaminated soil |
| CN112457853B (en) * | 2020-11-25 | 2022-01-07 | 河南省科学院高新技术研究中心 | Zinc-rich biochar, preparation method thereof and application of zinc-rich biochar in passivation and remediation of heavy metal contaminated soil |
| CN114455585A (en) * | 2022-02-16 | 2022-05-10 | 青海师范大学 | Method for adsorbing carbon dioxide in air |
| CN114455585B (en) * | 2022-02-16 | 2024-01-16 | 青海师范大学 | Method for adsorbing carbon dioxide in air |
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