CN110180511A - Adsorb heavy metal plural gel and preparation method thereof - Google Patents
Adsorb heavy metal plural gel and preparation method thereof Download PDFInfo
- Publication number
- CN110180511A CN110180511A CN201910480362.8A CN201910480362A CN110180511A CN 110180511 A CN110180511 A CN 110180511A CN 201910480362 A CN201910480362 A CN 201910480362A CN 110180511 A CN110180511 A CN 110180511A
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- Prior art keywords
- plural gel
- solution
- heavy metal
- preparation
- sodium alginate
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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
- B01J20/22—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
-
- 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
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28047—Gels
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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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention belongs to heavy metal pollution regulation fields, and in particular to a kind of absorption heavy metal plural gel, the plural gel are prepared using sodium alginate, polyethylene glycol oxide and porous ceramics nano material as primary raw material.The invention further relates to a kind of preparation method of plural gel, include the following steps: a) that sodium alginate, polyethylene glycol oxide and porous ceramics nano material is soluble in water after mixing, obtains solution A；B) solution A is added dropwise in calcium nitrate solution, is stood after stirring evenly and forms gel；C) gained soak in step b) is taken out after impregnating 24~36 hours in acetone-water solution and obtains plural gel.Absorption heavy metal plural gel of the invention, simple process, raw material are easy to get, and gained plural gel heavy metal removing rate is high, quick, no biotoxicity, degradable, no pollution to the environment.
Description
Technical field
The invention belongs to heavy metal pollution regulation fields, and in particular to a kind of absorption heavy metal plural gel and its preparation side
Method.
Background technique
Heavy metal wastewater thereby is mainly derived from the industries such as mining, smelting chemical, and heavy metal ion is to animal, plant and microorganism
It with significant ground toxicity, and is not easily decomposed, easily accumulates and generate toxicity in vivo, be the polluter of current most harmfulness
One of.For example, though copper is the essential trace elements of the human body, after a large amount of heavy metal ion copper of remaining in human body,
Easily the intracorporal internal organs of body are caused to bear, especially liver and gallbladder, after both organs go wrong, maintains people intracorporal new
Old metabolism will get muddled, cirrhosis, and liver ascites is even even more serious.
Heavy metal wastewater thereby minimizing technology mainly has: absorption method, chemical method, bioanalysis, wherein absorption method is because of quick, effect
It is good, at low cost and be widely used.
Using the heavy metal in absorption method removal waste water, adsorbent plays key player, and the heterogeneity of adsorbent is determined
The variety classes of absorption heavy metal ion are determined.Common adsorbent mainly active charcoal, biomass material, mineral raw material
Deng, but since the adsorbed content of beary metal of these adsorbent materials is very low, preparation process is complicated, it is therefore necessary to it is directed to heavy metal
It is proposed a kind of efficient, quick, degradable adsorbent material.
One entitled " research of epoxychloropropane cross-linked chitosan/sodium alginate absorption copper ion " (Yuan Yihua etc., China
Southern Polytechnics's journal (natural science edition), 2012,40 (7): 148-154) document in record, with epoxychloropropane be crosslinking
Agent is combined together chitosan and sodium alginate by the method for etherificate.By modification, the good mechanical performance of sodium alginate
The flocculation ability of chitosan can be enhanced, modified high polymer coagulant is to the Cu in water phase2+With good adsorptivity.But
In face of the heavy metal pollution being on the rise, the effect of this adsorbent also slightly aobvious " unable to do what one wishes " therefore needs a kind of adsorptivity
Can preferably, the higher adsorbent of heavy metal removing rate to be to get rid of this predicament.
Summary of the invention
It is quick, heavy metal removing rate is high the purpose of the present invention is to provide a kind of absorption heavy metal plural gel, and not
It will cause secondary pollution.
To achieve the above object, the technical solution adopted by the present invention are as follows: a kind of absorption heavy metal plural gel, it is described compound
Gel is prepared using sodium alginate, polyethylene glycol oxide and porous ceramics nano material as primary raw material.
The porous ceramics nano material, specific surface area are 180~900m2·g-1, mean pore sizes 28nm.Its function
Fixed heavy metal ion can effectively be adsorbed in group, and physical stability is strong.Its main component of porous ceramics nano material is two
Silica and silicate, organic and inorganic unimolecule are grafted in porous ceramic surface, by different organic functions monolayers with altogether
Valence link is incorporated in ceramic hole surface realization and is modified to it, and porous ceramic particles is made to have targeting binding ability and activity higher heavy
Metal ion combines and constitutes stable form, i.e. promotion heavy metal element is turned from the higher form of activity to the low form of activity
Change, to reduce the biological effectiveness and transportable property of heavy metal, achievees the purpose that heavy metal is passivated.Especially this material exists
Leachable is not generated during absorption heavy metal, secondary pollution will not be generated.
Single porous ceramics nano material cannot be mixed with water to be mixed, but after mixing with sodium alginate and polyethylene glycol oxide
It adds in water, after three's dissolution, porous ceramics nano material can be presented in water with sodium alginate and polyethylene glycol oxide
The state being mutually dissolved out, mixed solution are the sticky shape of dark brown.It should be noted that the state of this similar dissolution not shadow
The porous structure and absorption property for ringing porous ceramics nano material, cooperate with mutually between sodium alginate-polyethylene glycol oxide instead
Promote, to greatly improve plural gel to the absorption property of heavy metal ion.
Absorption heavy metal plural gel of the invention, raw material are easy to get, and heavy metal removing rate is high, quick, no biotoxicity,
It is degradable, no pollution to the environment.
Another object of the present invention is to provide a kind of preparation method of above-mentioned absorption heavy metal plural gel, simple processes
Easy to operate, raw material is easy to get, and properties of product are stablized, no biotoxicity and degradable.
To achieve the above object, a kind of the technical solution adopted by the present invention are as follows: system of above-mentioned absorption heavy metal plural gel
Preparation Method includes the following steps:
A) sodium alginate, polyethylene glycol oxide and porous ceramics nano material is soluble in water after mixing, obtain solution A；
B) solution A is added dropwise in calcium nitrate solution, is stood after stirring evenly and forms gel；
C) gained soak in step b) is taken out after impregnating 24~36 hours in acetone-water solution and obtains plural gel.
In above scheme, there is sodium alginate free carboxyl can react with heavy metal, but due to mechanical strength
Difference is easily decomposed by the microorganisms in water；Polyethylene glycol oxide has high intensity, corrosion-resistant, compensates for lacking for sodium alginate well
Point；In addition, porous ceramics nano material has biggish specific surface area, heavy metal ion can be effectively adsorbed, by alginic acid
Sodium is combined with ceramic nano material, and three mutually acts synergistically, and is not only further enhanced the absorption to heavy metal ion and is made
With, also, with the presence of adsorbent gel form, there are stronger mechanical performance and faster adsorption efficiency, it is direct after the completion of absorption
Gel is taken out, advantage becomes apparent compared with powdered absorbent, and plural gel no biotoxicity, and it is degradable, to environment without dirt
Dye.
Preferably, in the step a), three kinds of sodium alginate, polyethylene glycol oxide and porous ceramics nano material originals
The mass ratio of material is 2:(0.9~1.1): (1~4)；More preferable three's mass ratio 2:1:4.Under the synergistic effect of three kinds of raw materials,
The adsorption effect of plural gel should be improved, guarantees good mechanical performance again.In the process, multiple to avoid other impurities from influencing
Closing gel is absorption property, and water used is ultrapure water, and sodium alginate content is 2%~3% in solution A after addition ultrapure water.
It preferably, is formation stable gel, in the step b), calcium nitrate solution concentration is 0.2~0.5mol/L, nitric acid
Calcium solution volume is 4~6 times of solution A volume；Solution A is added dropwise in calcium nitrate solution and after stirring evenly, under the conditions of 5~40 DEG C
Stand 12~18 hours.
Further preferably, in the step c), gel impregnates 24 hours in 4% acetone-water solution.After gel-forming,
It is impregnated with acetone-water solution, the solubility dissolved out in gel is more than impurity, such as the nitrate ion that calcium nitrate solution is brought into.
Detailed description of the invention
Fig. 1 is plural gel Adsorption of Cu obtained by embodiment2+Preceding SEM figure；
Fig. 2 is plural gel Adsorption of Cu obtained by embodiment2+SEM figure afterwards.
Specific embodiment
Technical solution of the present invention is described in further detail below with reference to embodiment.
Embodiment
Preparation: 5g sodium alginate, 2.5g polyethylene glycol oxide and 10g ceramic nano material are uniformly mixed, and it is super that 200ml is added
Pure water simultaneously stirs, and obtains solution A after being completely dissolved sodium alginate and polyethylene glycol oxide, and solution A is added drop-wise to 1L concentration and is
It in the three nitric hydrate calcium solutions of 0.3mol/L and stirs evenly, it is stable solidifying that formation in 12 hours is placed under the conditions of 20 DEG C of temperature
Glue, by soak in 4% acetone-water solution for 24 hours after, taking-up obtain absorption heavy metal plural gel.
Detection: taking the above-mentioned plural gel of 4ml to be put into triangular flask, and the Cu that 50ml concentration is 50mg/L is added2+Solution first will
Triangular flask is placed in that temperature is 25 DEG C, revolving speed is 180min to be shaken in the constant temperature oscillation box of 150r/min, then be placed in 3000r/min's
Centrifugal treating 10min in centrifuge, using Cu in solution after Inductively coupled plasma optical emission spectrometer measurement processing2+Concentration,
It calculates after being adsorbed using above-mentioned plural gel to the heavy metal ion in solution, Cu2+Removal rate be 94.94%.
Comparative example
Preparation: 5g sodium alginate and 2.5g polyethylene glycol oxide are uniformly mixed, and 200ml ultrapure water is added, and stirring keeps its complete
Fully dissolved obtains solution A, and solution A is added drop-wise in the three nitric hydrate calcium solutions of 0.3mol/L, after mixing evenly in 20 DEG C of items
12 hours formation stable gels are stood under part, in 4% acetone-water solution for 24 hours by soak, removal obtains absorption heavy metal
Gel.
Detection: taking the above-mentioned plural gel of 4ml to be put into triangular flask, and the Cu that 50ml concentration is 50mg/L is added2+Solution first will
Triangular flask is placed in that temperature is 25 DEG C, revolving speed is 180min to be shaken in the constant temperature oscillation box of 150r/min, then be placed in 3000r/min's
Centrifugal treating 10min in centrifuge, using Cu in solution after Inductively coupled plasma optical emission spectrometer measurement processing2+Concentration,
It calculates after being adsorbed using above-mentioned plural gel to the heavy metal ion in solution, Cu2+Removal rate be 36.8%.
Claims (8)
1. a kind of absorption heavy metal plural gel, it is characterised in that: the plural gel be by sodium alginate, polyethylene glycol oxide and
Porous ceramics nano material is prepared.
2. the preparation method of plural gel according to claim 1, it is characterised in that: the porous ceramics nano material,
Specific surface area is 180~900m2·g-1, mean pore sizes 28nm.
3. a kind of preparation method of the plural gel as described in claim 1~2 is any, includes the following steps:
A) sodium alginate, polyethylene glycol oxide and porous ceramics nano material is soluble in water after mixing, obtain solution A；
B) solution A is added dropwise in calcium nitrate solution, is stood after stirring evenly and forms gel；
C) gained soak in step b) is taken out after impregnating 24~36 hours in acetone-water solution and obtains plural gel.
4. the preparation method of plural gel according to claim 3, it is characterised in that: in the step a), sodium alginate gathers
The mass ratio of three kinds of raw materials of ethylene oxide and porous ceramics nano material is 2:(0.9~1.1): (1~4).
5. the preparation method of plural gel according to claim 3, it is characterised in that: in the step a), water used is
Ultrapure water, it is 2%~3% that sodium alginate content in solution A, which is added after ultrapure water,.
6. the preparation method of plural gel according to claim 3, it is characterised in that: in the step b), calcium nitrate solution
Concentration is 0.2~0.5mol/L, and calcium nitrate solution volume is 4~6 times of solution A volume.
7. the preparation method of plural gel according to claim 3, it is characterised in that: in the step b), solution A is added dropwise to
In calcium nitrate solution and after stirring evenly, 12~18 hours are stood under the conditions of 5~40 DEG C.
8. the preparation method of plural gel according to claim 3, it is characterised in that: in the step c), gel is 4%
It is impregnated 24 hours in acetone-water solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910480362.8A CN110180511A (en) | 2019-06-04 | 2019-06-04 | Adsorb heavy metal plural gel and preparation method thereof |
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| CN201910480362.8A CN110180511A (en) | 2019-06-04 | 2019-06-04 | Adsorb heavy metal plural gel and preparation method thereof |
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| CN110180511A true CN110180511A (en) | 2019-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729624A (en) * | 2020-07-08 | 2020-10-02 | 江苏科技大学 | Preparation and application method of biogel for environmental remediation |
Citations (3)
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| CN101879429A (en) * | 2010-07-02 | 2010-11-10 | 江南大学 | Rigidity pottery/agarose composite microsphere and preparation method thereof |
| CN103804828A (en) * | 2014-02-14 | 2014-05-21 | 江南大学 | Compound hydrogel capable of adsorbing heavy metal ions and preparation method of compound hydrogel |
| CN108726623A (en) * | 2018-06-06 | 2018-11-02 | 大连理工大学 | It is a kind of based on the repeatable sewage water treatment method using modified porous ceramic material |
-
2019
- 2019-06-04 CN CN201910480362.8A patent/CN110180511A/en active Pending
Patent Citations (3)
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|---|---|---|---|---|
| CN101879429A (en) * | 2010-07-02 | 2010-11-10 | 江南大学 | Rigidity pottery/agarose composite microsphere and preparation method thereof |
| CN103804828A (en) * | 2014-02-14 | 2014-05-21 | 江南大学 | Compound hydrogel capable of adsorbing heavy metal ions and preparation method of compound hydrogel |
| CN108726623A (en) * | 2018-06-06 | 2018-11-02 | 大连理工大学 | It is a kind of based on the repeatable sewage water treatment method using modified porous ceramic material |
Non-Patent Citations (4)
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| 吴克刚等: "《食品微胶囊技术》", 31 July 2006 * |
| 吴昊等: "海藻酸钠-聚氧化乙烯包埋活性炭去除废水中铜离子的研究", 《环境污染与防治》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729624A (en) * | 2020-07-08 | 2020-10-02 | 江苏科技大学 | Preparation and application method of biogel for environmental remediation |
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Application publication date: 20190830 |