CN104998621A - Chitosan-coated groundwater remediation agent with soil heavy metal adsorption function and preparation method therefor - Google Patents
Chitosan-coated groundwater remediation agent with soil heavy metal adsorption function and preparation method therefor Download PDFInfo
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- CN104998621A CN104998621A CN201510403845.XA CN201510403845A CN104998621A CN 104998621 A CN104998621 A CN 104998621A CN 201510403845 A CN201510403845 A CN 201510403845A CN 104998621 A CN104998621 A CN 104998621A
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Abstract
The invention discloses a chitosan-coated groundwater remediation agent with a soil heavy metal adsorption function. The chitosan-coated groundwater remediation agent is characterized by comprising the following raw materials in parts by weight: 60-80 parts of polymer chitosan, 2-3 parts of cross-linked zeolite, 1-2 parts of modified nanoscale zero-valent iron, 5-8 parts of hydroxyapatite, 1-2 parts of graphene oxide, 1-2 parts of fir powder, 6-9 parts of Fe3O4 magnetic particles, 1-2 parts of ore, 1-2 parts of clay, 6-8 parts of carboxylic acid, 3-4 parts of NaY zeolite and a proper amount of water. According to the chitosan-coated groundwater remediation agent, the inner Fe3O4 magnetic particle layer, the middle polymer chitosan layer, the graphene oxide grafting layer and the outer ore and clay-doped modified nanoscale zero-valent iron layer are coated layer by layer to prepare the groundwater remediation agent; the groundwater remediation agent is long in action time; the adsorption of heavy metal ions in groundwater is directly realized by modified nanoscale zero-valent iron and porous ore and clay in the outer layer; the remediation of heavy metal is realized through the chitosan-coated Fe3O4 magnetic particles in the inner layer; and the chitosan-coated groundwater remediation agent is remarkable in action effect and long in action time.
Description
Technical field
The invention belongs to ground water protection agent field, specifically relate to a kind of Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function and preparation method thereof.
Background technology
Lithic drainage drinking water, relation underground and land and even in the sky and marine all living things; With the card development of industrial or agricultural and the development of correlation technique, the pollution of the heavy metal that underground water is more and more tired out, the reparation realizing underground water by simple, reliable method has significant role.
Shitosan, as a kind of natural macromolecular polysaccharide, have wide material sources, nontoxic, tasteless, good biocompatibility and the performance characteristic such as biodegradation and good antibacterial adsorptivity, and its catabolite is nontoxic; In chitosan molecule structure, there is a large amount of free amino acids, be positively charged macromolecular compound rare in natural polysaccharide.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function and preparation method thereof.
For achieving the above object, the technical solution used in the present invention is:
A kind of Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function, it is characterized in that, comprise by the raw material of following weight portion: polymer chitosan 60-80, crosslinked zeolite 2-3, modified Nano Zero-valent Iron 1-2, hydroxyapatite 5-8, graphene oxide 1-2, fir powder 1-2, Fe3O4 magnetic-particle 6-9, ore 1-2, clay 1-2, carboxylic acid 6-8, NaY zeolite 3-4 and appropriate water.
The Chitosan-coated with heavy metal-polluted soil adsorption function urgees a groundwater remediation agent preparation method, it is characterized in that, comprises the following steps:
(1) getting hydroxy acid is dissolved in 6-8 water doubly, heating is stirred to even high-temperature acid solution, slowly adds polymer chitosan, be stirred to complete melting in high high-temperature acid solution, and add NaY zeolite, continuing slowly heats up is stirred to even coating film solution for standby;
(2) get in hydroxyapatite solution 5-6 water doubly, heating is stirred to even dispersed suspension, and toward dispersed suspension in, add fir powder, Fe3O4 magnetic-particle, after stirring, the cotton-shaped Magnetic Materials of the concentrated formation of heating, vacuum is for subsequent use;
(3) add in coating film solution by cotton-shaped Magnetic Materials, quiescence in high temperature places 5-9d, and be combineding with each other of both promotions, obtains compound for subsequent use;
(4) get compound and graphene oxide, be cross-linked zeolite mixing, and add gross weight 2-3 water doubly, heating is first stirred to evenly at standing 3-5d, and the compound obtaining graphene oxide modification is for subsequent use;
(5) get ore, clay, modified Nano Zero-valent Iron, in nitrogen environment, stir 8-10min under high temperature 120-140 DEG C condition, add graphene oxide afterwards; and after adding gross weight 0.3-0.5 water doubly; stir, adopt comminutor to manufacture the particle of particle diameter 0.4-0.7cm, to obtain final product.
Beneficial effect of the present invention:
The present invention mixes the modified Nano Zero-valent Iron successively coated obtained groundwater remediation agent of ore and clay by internal layer Fe3O4 magnetic-particle, middle level polymer chitosan, graphene oxide grafting, skin, long action time, the outer absorption adopting modified Nano Zero-valent Iron and porous ore and clay directly to realize heavy metal ion in underground water, internal layer realizes the reparation of heavy metal by the Fe3O4 magnetic-particle of Chitosan-coated, action effect is obvious, long action time.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme of the present invention is further described.
Embodiment 1: the Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function described in the present embodiment, it is characterized in that, comprise by the raw material of following weight portion: polymer chitosan 60, crosslinked zeolite 2, modified Nano Zero-valent Iron 1, hydroxyapatite 5, graphene oxide 1, fir powder 1, Fe3O4 magnetic-particle 9, ore 2, clay 2, carboxylic acid 7, NaY zeolite 3 and appropriate water.
The Chitosan-coated with heavy metal-polluted soil adsorption function described in the present embodiment urgees groundwater remediation agent preparation method, it is characterized in that, comprises the following steps:
(1) getting hydroxy acid is dissolved in the water of 6 times, and heating is stirred to even high-temperature acid solution, slowly adds polymer chitosan, be stirred to complete melting, and add NaY zeolite toward high high-temperature acid solution in, and continuing slowly heats up is stirred to and evenly obtains coating film solution for standby;
(2) get in the water of hydroxyapatite solution 5 times, heating is stirred to even dispersed suspension, adds fir powder, Fe3O4 magnetic-particle toward dispersed suspension in, and after stirring, the cotton-shaped Magnetic Materials of the concentrated formation of heating, vacuum is for subsequent use;
(3) add in coating film solution by cotton-shaped Magnetic Materials, quiescence in high temperature places 7d, and be combineding with each other of both promotions, obtains compound for subsequent use;
(4) get compound and graphene oxide, be cross-linked zeolite mixing, and add the water of gross weight 2 times, heating is first stirred to evenly at standing 4d, and the compound obtaining graphene oxide modification is for subsequent use;
(5) get ore, clay, modified Nano Zero-valent Iron, in nitrogen environment, stir 8min under high temperature of 120 DEG C condition, add graphene oxide afterwards, and after adding the water of gross weight 0. 4 times, stir, adopt comminutor to manufacture the particle of particle diameter 0.4cm, to obtain final product.
The groundwater remediation agent that the present embodiment makes is got 10 kilograms to add in the pond of the content of beary metal 20% of 2KL, continuous measurement eight months, during second month test, content of beary metal is 12.8%, during test in four month, content of beary metal is 10.4%, during test in six month, content of beary metal is 7.4%, during test in six month, content of beary metal is 6.8%, and 6 to 8 months groundwater remediation agent shelf-lifves that the present embodiment makes are described, repairing effect reaches 66%.
Embodiment 2:
The Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function described in the present embodiment, it is characterized in that, comprise by the raw material of following weight portion: polymer chitosan 70, crosslinked zeolite 2.5, modified Nano Zero-valent Iron 1.5, hydroxyapatite 6.5, graphene oxide 1.5, fir powder 1.5, Fe3O4 magnetic-particle 7.5, ore 1.5, clay 1.5, carboxylic acid 7, NaY zeolite 3.5 and appropriate water.
Preparation method is with embodiment 1.
The groundwater remediation agent that the present embodiment makes is got 10 kilograms to add in the pond of the content of beary metal 20% of 2KL, continuous measurement eight months, during second month test, content of beary metal is 12.7%, during test in four month, content of beary metal is 10.2%, during test in six month, content of beary metal is 7.2%, during test in six month, content of beary metal is 6.5%, and 6 to 8 months groundwater remediation agent shelf-lifves that the present embodiment makes are described, repairing effect reaches 67.5%.
Embodiment 3:
The Chitosan-coated groundwater remediation agent with heavy metal-polluted soil adsorption function described in the present embodiment, it is characterized in that, comprise by the raw material of following weight portion: polymer chitosan 80, crosslinked zeolite 3, modified Nano Zero-valent Iron 2, hydroxyapatite 8, graphene oxide 2, fir powder 2, Fe3O4 magnetic-particle 9, ore 2, clay 2, carboxylic acid 8, NaY zeolite 4 and appropriate water.
Preparation method is with embodiment 1.
The groundwater remediation agent that the present embodiment makes is got 10 kilograms to add in the pond of the content of beary metal 20% of 2KL, continuous measurement eight months, during second month test, content of beary metal is 12.9%, during test in four month, content of beary metal is 10.3%, during test in six month, content of beary metal is 7.4%, during test in six month, content of beary metal is 6.6%, and 6 to 8 months groundwater remediation agent shelf-lifves that the present embodiment makes are described, repairing effect reaches 67%.
Claims (2)
1. one kind has the Chitosan-coated groundwater remediation agent of heavy metal-polluted soil adsorption function, it is characterized in that, comprise by the raw material of following weight portion: polymer chitosan 60-80, crosslinked zeolite 2-3, modified Nano Zero-valent Iron 1-2, hydroxyapatite 5-8, graphene oxide 1-2, fir powder 1-2, Fe3O4 magnetic-particle 6-9, ore 1-2, clay 1-2, carboxylic acid 6-8, NaY zeolite 3-4 and appropriate water.
2. the Chitosan-coated with heavy metal-polluted soil adsorption function urgees a groundwater remediation agent preparation method, it is characterized in that, comprises the following steps:
(1) getting hydroxy acid is dissolved in 6-8 water doubly, heating is stirred to even high-temperature acid solution, slowly adds polymer chitosan, be stirred to complete melting in high high-temperature acid solution, and add NaY zeolite, continuing slowly heats up is stirred to even coating film solution for standby;
(2) get in hydroxyapatite solution 5-6 water doubly, heating is stirred to even dispersed suspension, and toward dispersed suspension in, add fir powder, Fe3O4 magnetic-particle, after stirring, the cotton-shaped Magnetic Materials of the concentrated formation of heating, vacuum is for subsequent use;
(3) add in coating film solution by cotton-shaped Magnetic Materials, quiescence in high temperature places 5-9d, and be combineding with each other of both promotions, obtains compound for subsequent use;
(4) get compound and graphene oxide, be cross-linked zeolite mixing, and add gross weight 2-3 water doubly, heating is first stirred to evenly at standing 3-5d, and the compound obtaining graphene oxide modification is for subsequent use;
(5) get ore, clay, modified Nano Zero-valent Iron, in nitrogen environment, stir 8-10min under high temperature 120-140 DEG C condition, add graphene oxide afterwards; and after adding gross weight 0.3-0.5 water doubly; stir, adopt comminutor to manufacture the particle of particle diameter 0.4-0.7cm, to obtain final product.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537255A (en) * | 2016-01-31 | 2016-05-04 | 苏州高通新材料科技有限公司 | Application of sulfonated graphene oxide in remediation of soil contaminated by polycyclic aromatic hydrocarbons |
| CN106064074A (en) * | 2016-06-08 | 2016-11-02 | 芜湖市长江起重设备制造有限公司 | A kind of crane compound for treatment of electroplating wastes of hole even density based on modified waster paper slag and preparation method thereof |
| CN106409371A (en) * | 2016-10-13 | 2017-02-15 | 东华理工大学 | Hydroxyapatite-coating PRB filling material and preparing method and underground-water uranium removing application method thereof |
| CN107715838A (en) * | 2017-11-07 | 2018-02-23 | 东南大学 | It can remove vertical barrier material of contaminated site organic pollution and preparation method thereof |
| CN108555010A (en) * | 2018-01-31 | 2018-09-21 | 中冶华天南京工程技术有限公司 | Application and method of the nano zero valence iron of Chitosan-coated in removal heavy-metal contaminated soil antimony |
| CN111073658A (en) * | 2019-11-21 | 2020-04-28 | 河北建设集团安装工程有限公司 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
| CN112779022A (en) * | 2021-01-15 | 2021-05-11 | 清华大学 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537255A (en) * | 2016-01-31 | 2016-05-04 | 苏州高通新材料科技有限公司 | Application of sulfonated graphene oxide in remediation of soil contaminated by polycyclic aromatic hydrocarbons |
| CN106064074A (en) * | 2016-06-08 | 2016-11-02 | 芜湖市长江起重设备制造有限公司 | A kind of crane compound for treatment of electroplating wastes of hole even density based on modified waster paper slag and preparation method thereof |
| CN106409371A (en) * | 2016-10-13 | 2017-02-15 | 东华理工大学 | Hydroxyapatite-coating PRB filling material and preparing method and underground-water uranium removing application method thereof |
| CN106409371B (en) * | 2016-10-13 | 2018-06-08 | 东华理工大学 | A kind of Coated With Hydroxyapatite PRB packing materials and preparation method thereof and underground water remove uranium application process |
| CN107715838A (en) * | 2017-11-07 | 2018-02-23 | 东南大学 | It can remove vertical barrier material of contaminated site organic pollution and preparation method thereof |
| CN108555010A (en) * | 2018-01-31 | 2018-09-21 | 中冶华天南京工程技术有限公司 | Application and method of the nano zero valence iron of Chitosan-coated in removal heavy-metal contaminated soil antimony |
| CN111073658A (en) * | 2019-11-21 | 2020-04-28 | 河北建设集团安装工程有限公司 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
| CN112779022A (en) * | 2021-01-15 | 2021-05-11 | 清华大学 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
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Application publication date: 20151028 |