CN113000024A - Method for preparing biochar material by using tea leaves and application of biochar material in pesticide adsorption - Google Patents
Method for preparing biochar material by using tea leaves and application of biochar material in pesticide adsorption Download PDFInfo
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- CN113000024A CN113000024A CN202110240382.5A CN202110240382A CN113000024A CN 113000024 A CN113000024 A CN 113000024A CN 202110240382 A CN202110240382 A CN 202110240382A CN 113000024 A CN113000024 A CN 113000024A
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- 241001122767 Theaceae Species 0.000 title claims abstract description 81
- 239000000463 material Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 22
- 239000000575 pesticide Substances 0.000 title claims abstract description 10
- 238000000197 pyrolysis Methods 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000010298 pulverizing process Methods 0.000 claims abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000005488 Bispyribac Substances 0.000 claims 3
- RYVIXQCRCQLFCM-UHFFFAOYSA-N bispyribac Chemical compound COC1=CC(OC)=NC(OC=2C(=C(OC=3N=C(OC)C=C(OC)N=3)C=CC=2)C(O)=O)=N1 RYVIXQCRCQLFCM-UHFFFAOYSA-N 0.000 claims 3
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- FUHMZYWBSHTEDZ-UHFFFAOYSA-M bispyribac-sodium Chemical compound [Na+].COC1=CC(OC)=NC(OC=2C(=C(OC=3N=C(OC)C=C(OC)N=3)C=CC=2)C([O-])=O)=N1 FUHMZYWBSHTEDZ-UHFFFAOYSA-M 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000447 pesticide residue Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 108091005804 Peptidases Proteins 0.000 description 2
- 239000004365 Protease Substances 0.000 description 2
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 108091005658 Basic proteases Proteins 0.000 description 1
- 235000009024 Ceanothus sanguineus Nutrition 0.000 description 1
- 240000003553 Leptospermum scoparium Species 0.000 description 1
- 235000015459 Lycium barbarum Nutrition 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- 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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/20—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
-
- 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
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Tea And Coffee (AREA)
- Fertilizers (AREA)
Abstract
本发明公开了利用茶渣制备生物炭材料的方法及其在农药吸附中的应用，制备方法包括如下步骤：(1)以茶渣作为原料，将其烘干处理后，再对其进行粉碎处理，然后将粉碎处理获得的物料进行筛选处理后，获得预处理茶渣；(2)将预处理茶渣置于650～750℃环境下进行热解处理110～130min，其中，热解处理过程中还持续通入保护气体，令预处理茶渣在保护气体氛围下热解处理，物料冷却后，获得热解物料；(3)将热解物料进行研磨处理，制得茶渣生物炭材料；本方案茶渣生物炭材料合成简便，原料来源简单，价格低廉，绿色环保，比表面积大、社会经济效益高和较强吸附力的特点；同时还拓展了茶渣废弃物的应用，为茶渣的资源化利用提供理论基础和技术支持。
The invention discloses a method for preparing biochar material by using tea residues and its application in pesticide adsorption. The preparation method includes the following steps: (1) using tea residues as raw materials, drying them, and then pulverizing them , and then screen the materials obtained by the crushing treatment to obtain pre-treated tea residues; (2) place the pre-treated tea residues in an environment of 650-750°C for 110-130 minutes of pyrolysis, wherein, during the pyrolysis treatment The protective gas is also continuously introduced to make the pretreated tea residues pyrolyzed under the protective gas atmosphere, and after the material is cooled, the pyrolysis material is obtained; (3) the pyrolysis material is ground to obtain the tea residue biochar material; The scheme tea residue biochar material has the characteristics of simple synthesis, simple source of raw materials, low price, green environmental protection, large specific surface area, high social and economic benefits, and strong adsorption force; at the same time, it also expands the application of tea residue waste, which is a good source of tea residues. Resource utilization provides theoretical basis and technical support.
Description
Technical Field
The invention relates to the technical field of adsorption materials, in particular to a method for preparing a biochar material by using tea leaves and application of the biochar material in pesticide adsorption.
Background
Tea trees are one of the important economic crops in China, and Fujian is one of the main tea-producing provinces in China. According to statistics, the annual consumption of domestic tea in 2019 reaches 202.56 ten thousand tons, the annual consumption is increased by 11.50 ten thousand tons compared with 2018, the increase is 6.02%, the proportion of waste generated by tea processing is gradually increased, a large amount of tea branches, tea stalks, tea ash, tea leaves and the like are accumulated in the production process, so that the waste of resources is caused, and the treatment cost and the environmental pollution are increased. The biochar prepared by using the tea leaves can recycle resources, so that the aim of changing waste into valuable is fulfilled, and the sustainable development of the environment is met.
Tea leaves contain a large amount of organic carbon, nitrogen sources and various antioxidant substances, people generally use the tea leaves in fertilizers and feeds to improve the quality of products, and moreover, the results show that the extraction effect of alkaline protease and compound protease is better when researching the process for extracting protein in the tea leaves by a protease method. The method for preparing the biochar by using the tea leaves is a novel treatment method.
The biochar is a solid residue obtained by heat treatment of biomass rich in carbon organic matters at a certain temperature (300-700 ℃) under an anaerobic or anoxic condition. The biomass charcoal is generally alkaline, the pH value is 7.0-10, the higher the cracking temperature is, the higher the pH value is, and a certain amount of ash is generated in the pyrolysis process. The composition and structure of the biochar are related to the preparation temperature, and the structural pore diameter is thinner as the temperature is higher; the biochar has a developed pore structure, good adsorption performance and an increased specific surface area, and is beneficial to adsorbing pesticides and reducing pesticide residues; after the biochar contacts air, partial oxygen-containing functional groups are formed, so that the ion exchange capacity is enhanced, and the adsorption capacity is improved. However, the current research on preparing the biochar from the tea leaves has little attention on improving pesticide residues, and particularly, the adsorption of bispyribac-sodium is less reported.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing a biochar material from tea leaves, which is reliable in implementation, low in cost and capable of recycling tea leaf waste materials, and an application of the method in pesticide adsorption.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a method for preparing a biochar material by using tea leaves comprises the following steps:
(1) taking tea leaves as a raw material, drying the tea leaves, then crushing the tea leaves, and screening the materials obtained by crushing to obtain pretreated tea leaves;
(2) performing pyrolysis treatment on the pretreated tea leaves at 650-750 ℃ for 110-130 min, wherein protective gas is continuously introduced in the pyrolysis treatment process to ensure that the pretreated tea leaves are pyrolyzed in the protective gas atmosphere, and cooling the material to obtain a pyrolyzed material;
(3) and grinding the pyrolysis material to obtain the tea residue biochar material.
As a possible implementation manner, further, in the step (1), the tea leaves are crushed by a crusher, and the crushed material is sieved by a 60-mesh sieve to obtain the pre-treated tea leaves.
As a possible implementation mode, further, in the step (2), the pretreated tea leaves are placed in a corundum pan and then placed in a tubular furnace for pyrolysis treatment.
As a preferable implementation option, in the step (2), the pyrolysis treatment temperature of the pretreated tea leaves is 700 ℃, and the pyrolysis treatment time is 120 min.
As a preferred implementation option, the protective gas is preferably nitrogen.
As a better implementation choice, youOptionally, in the step (3), the specific surface area of the prepared tea residue biochar material is 5.35m2/g。
Based on the preparation method, the invention also provides the application of the tea residue biochar material prepared based on the method in pesticide adsorption.
As a possible embodiment, further, the pesticide contains bispyribac-sodium.
As a better implementation choice, the content of the bispyribac-sodium is preferably 100 mg/L.
As a better implementation choice, the adsorption quantity of the tea residue biochar material to the bispyribac-sodium is preferably 3.13 mg/g.
Because the tea leaves in China have large yield, various varieties and wide application range, the tea leaves contain a large amount of cellulose, protein, amino acid, tea polyphenol, trace elements and other components, and the tea leaves are widely applied to the aspects of fertilizer, feed, daily life such as pillow core manufacture and the like. Currently, researches on preparing the biochar from the tea leaves have little attention on improving pesticide residues, and particularly, the adsorption of bispyribac-sodium is less reported.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:
1. the tea residue biochar material prepared by the scheme has a certain adsorption effect on herbicide, and the adsorption amount is 3.13mg/g through verification;
2. the tea residue biochar material has the characteristics of simplicity and convenience in synthesis, simple raw material source, low price, greenness, environmental friendliness, large specific surface area, high social and economic benefits and strong adsorption force;
3. the scheme expands the application of the tea residue waste and provides theoretical basis and technical support for the treatment method and resource utilization of the tea residue in the future.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram showing that the prepared tea residue biochar is not ground and is ground after being washed with water, wherein (a) is in a state before being ground and (b) is in a state after being ground;
FIG. 2 is a representation diagram of X-ray powder diffraction analysis and scanning electron microscope imaging of the tea residue biochar prepared by the scheme.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Similarly, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Preparation of tea residue biochar material
A method for preparing a biochar material by using tea leaves comprises the following steps:
(1) taking tea leaves as a raw material for preparing the biochar, drying, crushing by a crusher, sieving by a 60-mesh sieve, and keeping dry to obtain pretreated tea leaves;
(2) placing the dried pretreated tea residue in a corundum pan, placing the corundum pan in a tubular furnace, and continuously introducing N at 700 DEG C2Performing pyrolysis treatment for 120min under the conditions of (a) to obtain a pyrolysis material, which is shown in fig. 1(a) after cooling;
(3) grinding the pyrolysis material to obtain tea residue biochar material (shown in figure 1 (b)), and storing in a dryer for use.
Material characterization
The crystal form of the prepared tea residue biochar material is characterized by X-ray powder diffraction, the result shows that the prepared biochar is in an amorphous state (figure 2a), the appearance of the biochar is observed by using SEM (scanning Electron microscope), and the result shows that the surface of the tea residue biochar generates a pore structure and is in a certain folded strip shape(FIG. 2 b). The specific surface area of the tea residue biochar prepared by BET determination is 5.35m2/g。
Adsorption test of tea residue biochar material on bispyribac-sodium
(1) 100mL of bispyribac-sodium solution of 100mg/L is prepared as mother solution;
(2) weighing 0.05g of the prepared tea residue biochar material, adding the tea residue biochar material into the solution, and stirring at normal temperature in a magnetic stirrer;
(3) the solution was filtered through a 2ml syringe and a 0.22 μm aqueous needle;
(4) the resulting 2mL solution was diluted to 20mg/L, and absorbance at different time points was measured by an ultraviolet spectrophotometer (UV-Vis) and repeated three times to obtain an average value.
(5) The measured value is taken into a standard curve to be converted into corresponding concentration, and the adsorption amount is calculated.
The determination shows that the prepared biochar has a good adsorption effect on bispyribac-sodium, the removal rate is 2.23%, and the adsorption quantity is 3.13 mg/g.
The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943029A (en) * | 2021-09-28 | 2022-01-18 | 北京农学院 | Application of coffee grounds biochar in enriched water with pyrethroid pesticides |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841495A (en) * | 2020-07-13 | 2020-10-30 | 安徽农业大学 | Preparation method of porous tea residue biochar with high specific surface area |
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- 2021-03-04 CN CN202110240382.5A patent/CN113000024A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841495A (en) * | 2020-07-13 | 2020-10-30 | 安徽农业大学 | Preparation method of porous tea residue biochar with high specific surface area |
Non-Patent Citations (2)
| Title |
|---|
| NEHA SHARMA等: ""In-vitro evaluation of rice straw biochars’ effect on ispyribac-sodium dissipation and microbial activity in soil"", 《ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY》 * |
| 陈华泉等: ""茶渣活性炭的制备及其对亚甲基蓝的吸附性能研究"", 《应用化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943029A (en) * | 2021-09-28 | 2022-01-18 | 北京农学院 | Application of coffee grounds biochar in enriched water with pyrethroid pesticides |
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