CN108993446A - A kind of preparation method of adsorbent for heavy metal - Google Patents
A kind of preparation method of adsorbent for heavy metal Download PDFInfo
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- CN108993446A CN108993446A CN201811036743.9A CN201811036743A CN108993446A CN 108993446 A CN108993446 A CN 108993446A CN 201811036743 A CN201811036743 A CN 201811036743A CN 108993446 A CN108993446 A CN 108993446A
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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
- B01J20/26—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
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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
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention relates to a kind of preparation method of adsorbent for heavy metal, step includes: the pretreatment of (1) modified carbon nano-tube；(2) preparation of poly-dopamine modified lithium carbon nanotube；(3) modified carbon nano-tube adsorpting lead ion from waste water is utilized；(4) adsorbance of test absorption front and back lead ion, evaluates the absorption property of modified carbon nano-tube.This method is simple, efficient, suitable for quickly removing the heavy metal lead ion waste water.
Description
Technical field
The invention belongs to the application fields of Environmental Chemistry, the in particular to minimizing technology of heavy metal ions in wastewater.
Background technique
With the rapid development of industry, heavy metal ion pollution has seriously affected human society survival and development and has formed
For the hot issue of World Focusing.Lead ion in environment is easy to enter in human body by food chain, can make to human health
At serious threat, it can cause to have a headache, have difficulty in breathing, cause intravascular hemolysis, injuring nerve system, based on these harm, people
Have studied a variety of methods to administer lead ion waste liquid.Oneself is had investigated various ways to remove lead ion to people,
Such as the filtering of the precipitation method, film, ion exchange, electrolysis method and absorption method, wherein absorption method is the most common method of people, this
Method operation is terse, and energy consumption is few, and expense is low, it is most important that removal rate is high.Nano material in adsorbent material has many suctions
Attached advantage, therefore by favor.
Carbon nanotube possesses in the bigger serface and high stability that traditional material does not have in terms of noxious substance
Blank pipe shape special construction makes it possess huge applications value in wastewater treatment and other field, especially in absorption heavy metal side
Face is had outstanding performance, while being studied also more.In order to preferably adsorb, be enriched with to heavy metal ion, researcher utilizes carbon
The characteristic that nanotube surface is easily modified is modified processing to it, its surface is made to connect upper specific functional group, can be to certain
Heavy metal has a good absorption property, this kind of application studies be paid more and more attention and carried out a variety of modification groups or
The research of polymer for heavy metals absorption.
Dopamine is that can be occurred under aerobic weak basic condition based on it with good adhesiveness to the modification of material
Autoxidation polymerization, generates a kind of one poly-dopamine of macromolecule and is adhered to matrix surface.This kind of macromolecule equally has various active
Group has good adsorptivity to positive heavy metal ion.It is basic adsorbent material with carbon nanotube, with chemical means to it
Surface modified, developing the high heavy-metal adsorption material of the novel adsorbance of one kind has potential application prospect.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of method for removing heavy metal in waste water lead ion, this method
The carbon nanotube modified using dopamine is as adsorbent, time-consuming less using the method for Static Adsorption, being capable of quick, high dose
Slave waste water in adsorb heavy metal lead ion；The prices of raw materials used in the present invention are cheap, obtained modified carbon nano-tube
Surface area with higher, adsorption capacity is strong, the potentiality with subsequent related application.
A kind of preparation method of adsorbent for heavy metal of the invention, comprising:
(1) pretreatment of carbon nanotube: take appropriate unmodified carbon nanotube in crucible, being placed in one timing of heating in Muffle furnace
Between, agraphitic carbon impurity is removed, cooling, kept dry is spare；
(2) poly-dopamine modified lithium carbon nanotube: weighing the carbon nanotube in step (1), ultrasonic treatment, then weighs a certain amount of more
Bar amine hydrochlorate, is placed in Tris-HCl buffer, room temperature magnetic agitation certain time, is repeatedly washed through ultrapure water to neutrality,
The modified carbon nano-tube washed is dried into 8 ~ 12 h in a vacuum drying oven, it is spare.
The temperature of the Muffle furnace as described in step (1) is 300 ~ 400 DEG C.
The heating time as described in step (1) is 20 ~ 50 min.
The quality of carbon nanotube described in the step (2) is 1.0 ~ 3.0 g.
The time of the ultrasonic treatment of carbon described in the step (2) is 20 ~ 50 min.
The quality of carbon dopamine hydrochloride described in the step (2) is 0.5 ~ 2.0 g.
The concentration of Tris-HCl buffer described in the step (2) are as follows: 0.001 ~ 0.1 mol/L, pH value are 6 ~ 9.
The time being stirred at room temperature described in the step (2) are as follows: 10 ~ 30 h.
Beneficial effect
(1) poly-dopamine modified lithium carbon nanotube prepared by the present invention, it is easy to operate, it is easy to industrial amplification；
(2) poly-dopamine modified lithium carbon nanotube prepared by the present invention quickly, in the slave waste water of high dose can adsorb heavy metal lead
Ion.
Detailed description of the invention
Fig. 1 is adsorbance of the modified carbon nano-tube to lead ion.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
The preparation of poly-dopamine modified lithium carbon nanotube, includes the following steps:
(1) pretreatment of carbon nanotube: take appropriate unmodified carbon nanotube in crucible, being placed in 350 DEG C of heating 30 in Muffle furnace
Min removes agraphitic carbon impurity, and cooling, kept dry is spare；
(2) poly-dopamine modified lithium carbon nanotube: weighing 2.0 g of carbon nanotube in step (1), is ultrasonically treated 30 min, then claim
1.0 g dopamine hydrochlorides are taken, are placed in Tris-HCl (pH=8.5) buffer of 0.01 mol/L, room temperature (25 DEG C) magnetic
Power stirs 24 h, is repeatedly washed through ultrapure water to neutrality, and the modified carbon nano-tube washed is done in 50 DEG C of vacuum ovens
Dry 12 h, it is spare.
Embodiment 2
Modified carbon nano-tube includes the following steps: the adsorption experiment of lead ion
100 mL of lead ion solution of the mg/L of 30 mg/L ~ 400 is measured respectively in 150 mL beakers, accurately weighs more parts of changes
0.05 g modified carbon nano-tube, is put in beaker, adjust pH be 5, shake 3 h at room temperature, then detection absorption after lead from
Adsorbance qe is calculated as follows in sub- concentration.
Qe=(C0-C1) V/m
In formula, C0, Ct are respectively indicated plumbum ion concentration in initial soln (mg/L), and C1 is that oscillation terminates metal in rear solution
Ion concentration (mg/L), V are the volume (L) of aqueous solution, and m is the quality (g) of modified carbon nano-tube.
Fig. 1 reflects influence of the concentration to absorption, and the adsorbance of modified carbon nano-tube is with plumbum ion concentration in solution
Increase and increase, until absorption reaches balance.When plumbum ion concentration is lower, the adsorbance of adsorbent is less, this may be because
For at low concentrations, the adsorption site on modified carbon nano-tube is not fully utilized；And with the increase of plumbum ion concentration, absorption
The adsorption site of unsaturated state in agent continues and lead ion combines, to make adsorbance increase, until absorption reaches balance.From
We can also be seen that adsorbent is 98.4 mg/g to the maximum saturation adsorbance of lead ion in figure, illustrate absorption of the invention
Agent is that a kind of adsorption capacity is big, efficient adsorbent for heavy metal.
Claims (8)
1. a kind of preparation method of adsorbent for heavy metal, including the following steps:
(1) pretreatment of carbon nanotube: take appropriate unmodified carbon nanotube in crucible, being placed in one timing of heating in Muffle furnace
Between, agraphitic carbon impurity is removed, cooling, kept dry is spare；
(2) poly-dopamine modified lithium carbon nanotube: weighing the carbon nanotube in step (1), ultrasonic treatment, then weighs a certain amount of more
Bar amine hydrochlorate, is placed in Tris-HCl buffer, room temperature magnetic agitation certain time, is repeatedly washed through ultrapure water to neutrality,
The modified carbon nano-tube washed is dried into 8 ~ 12 h in a vacuum drying oven, it is spare.
2. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(1) temperature of the Muffle furnace described in is 300 ~ 400 DEG C.
3. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(1) heating time described in is 20 ~ 50 min.
4. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(2) quality of the carbon nanotube described in is 1.0 ~ 3.0 g.
5. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(2) time of the carbon ultrasonic treatment described in is 20 ~ 50 min.
6. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(2) quality of the carbon dopamine hydrochloride described in is 0.5 ~ 2.0 g.
7. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(2) concentration of Tris-HCl buffer described in are as follows: 0.001 ~ 0.1 mol/L, pH value are 6 ~ 9.
8. a kind of preparation method of adsorbent for heavy metal according to claim 1, which is characterized in that the step
(2) time of room temperature magnetic agitation described in are as follows: 10 ~ 30 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811036743.9A CN108993446A (en) | 2018-09-06 | 2018-09-06 | A kind of preparation method of adsorbent for heavy metal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827954A (en) * | 2019-01-28 | 2019-05-31 | 黄河科技学院 | A kind of decorated by nano-gold poly-dopamine nanotube, preparation method and application |
| CN110975843A (en) * | 2019-12-17 | 2020-04-10 | 中国科学技术大学 | Preparation method and application of covalent organic framework based heavy metal ion adsorption separation membrane |
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| CN106390952A (en) * | 2016-10-13 | 2017-02-15 | 合众（佛山）化工有限公司 | Novel carbon nanotube composite hydrogel and preparation method thereof |
| US20180065105A1 (en) * | 2016-05-02 | 2018-03-08 | LiSo Plastics, L.L.C. | Multilayer polymeric membrane and process |
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2018
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| US20180065105A1 (en) * | 2016-05-02 | 2018-03-08 | LiSo Plastics, L.L.C. | Multilayer polymeric membrane and process |
| CN105879841A (en) * | 2016-05-31 | 2016-08-24 | 河南师范大学 | SiO2@PDA@ZIF-8 composite adsorbent for selectively adsorbing lead ions in wastewater and preparing method thereof |
| CN106390952A (en) * | 2016-10-13 | 2017-02-15 | 合众（佛山）化工有限公司 | Novel carbon nanotube composite hydrogel and preparation method thereof |
| CN107999033A (en) * | 2017-11-23 | 2018-05-08 | 浙江海洋大学 | A kind of poly-dopamine/aminated carbon nano tube/sodium alginate micro ball of arsenic-adsorbing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827954A (en) * | 2019-01-28 | 2019-05-31 | 黄河科技学院 | A kind of decorated by nano-gold poly-dopamine nanotube, preparation method and application |
| CN110975843A (en) * | 2019-12-17 | 2020-04-10 | 中国科学技术大学 | Preparation method and application of covalent organic framework based heavy metal ion adsorption separation membrane |
| CN110975843B (en) * | 2019-12-17 | 2021-08-13 | 中国科学技术大学 | Preparation method and application of covalent organic framework based heavy metal ion adsorption separation membrane |
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Application publication date: 20181214 |