CN106179209B - A kind of Cr VI adsorbent and its preparation method and application - Google Patents
A kind of Cr VI adsorbent and its preparation method and application Download PDFInfo
- Publication number
- CN106179209B CN106179209B CN201610567918.3A CN201610567918A CN106179209B CN 106179209 B CN106179209 B CN 106179209B CN 201610567918 A CN201610567918 A CN 201610567918A CN 106179209 B CN106179209 B CN 106179209B
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- adsorbent
- bamboo
- carbon powder
- bamboo charcoal
- modified bamboo
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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
-
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of Cr VI adsorbent and its preparation method and application, the adsorbent includes modified bamboo powdered carbon, and the grain size of modified bamboo powdered carbon is not less than 60 mesh.Compared with prior art, the present invention has the following advantages：(1) through the modified bamboo charcoal of the method for the invention, as adsorbent in use, the adsorption efficiency to Cr VI improves；(2) modified bamboo charcoal is environmentally friendly, pollution-free, and modifying process is simple to operation；(3) adsorbent of the present invention is applied to non-secondary pollution object generation in water treatment procedure, to no damage to human body.
Description
Technical field
The invention belongs to water treatment field, it is related to a kind of removing the method for Cr VI more particularly to a kind of Cr VI in water removal
Adsorbent and its preparation method and application.
Background technology
With the rapid development of industrial production and human society, problem of environmental pollution increasingly aggravates.Countless polluters
Be discharged into water environment, wherein heavy metal pollutants have hypertoxicity or carcinogenicity, and be difficult to carry out it is biodegradable.
In addition, it is easy enrichment in vivo and and then is accumulated in organism or human body by food chain.
Harmfulness in view of chromium and its extensive use in various industrial productions, manufacturing process, have from industrial wastewater
The removal chromium of effect has great importance.The common processing method of Cr VI has chemical (reduction) precipitation method, electrochemistry in water body
Method, membrane processing method, ion-exchange, biological treatment and absorption method etc..
Compared with numerous methods, the harmful substance in sewage is usually fixed on using the porosity of sorbing material by absorption method
Its surface is to be removed.Non-energy-consumption, non-secondary pollution do not have in removal process harmful substance to generate.China
Bamboo resource is very abundant, and bamboo itself is also required to cut down, and promotes the growth of Hsinchu.Bamboo charcoal is exactly that bamboo wood is pyrolyzed gained,
So making adsorbent with bamboo charcoal, cost is very low.In addition to directly utilizing bamboo wood, it can also utilize the residue of bamboo processing that bamboo is made
Charcoal.A kind of extensive, cheap as raw material sources and very promising sorbing material, the applicable value of bamboo charcoal deeper into
It studies and improves its adsorption effect to water pollutant as far as possible.Bamboo charcoal can be as a kind of choosing except conventional carbon
It selects, while processing is using waste, reduces the cost using conventional carbon, increase economic efficiency.
For heavy metal pollution in water, existing treatment technology mainly includes chemical precipitation method, electrochemical process, UF membrane
Method and ion-exchange etc..The means of the generally use of chemical precipitation method are that hexavalent chrome reduction is added lime at three prices
Or sodium hydroxide, it under alkaline condition precipitates trivalent trellis hydrate, is then removed, but this method can produce
Raw a large amount of sludge, the management of sludge, there are larger difficulties with final process for transport, of high cost, are also susceptible to secondary pollution；Electricity
Chemical method combines electrochemistry and chemical reaction process, but the effect in the heavy metal containing sewage to handling low concentration is not enough managed
Think, power consumption is big, and operating cost is high, and one-time investment is high；There is ion exchange resin in regeneration cost for ion-exchange
Higher problem；The cost of film process process is too high, and process is complicated, and fouling membrane and film permeation flux are low.
Invention content
The technical issues of solution：In order to overcome the deficiencies of existing technologies, a kind of Cr VI adsorption efficiency height is obtained, and to ring
The free of contamination adsorbent in border, the present invention provides a kind of Cr VI adsorbents and its preparation method and application.
Technical solution：A kind of Cr VI adsorbent, the adsorbent include modified bamboo powdered carbon, and the grain size of modified bamboo powdered carbon is not
Less than 60 mesh.
A kind of preparation method of Cr VI adsorbent, comprises the steps of：
(1) bamboo charcoal is broken for thin block, boils 30~60 minutes, be cooled to room temperature in distilled water, 100 DEG C~120
It is dried 20~30 hours at DEG C；
(2) bamboo charcoal for obtaining step (1) is broken, and polishing screens bamboo charcoal using the sieve of 60 mesh, obtains bamboo charcoal
Powder is collected storage and is prepared；
(3) it by Salzburg vitriol and 3- aminopropyl trimethoxysilanes, is successively put into the flask for filling n-hexane, magnetic
Power stirring stirring 30~60 minutes；
(4) bamboo carbon powder for obtaining step (2) is added in the mixed solution obtained by step (3), magnetic agitation 18~20
Hour, and through distilled water flushing, supersound process and filtering, the bamboo carbon powder being obtained by filtration is dried at 100 DEG C~120 DEG C,
Obtain adsorbent.
Preferably, in step (3) Salzburg vitriol dosage be 2~3g, 3- aminopropyl trimethoxysilane dosages be 3~
4g, n-hexane dosage are 50mL.
Preferably, bamboo carbon powder addition is 3~5g in step (4).
A kind of application of the Cr VI adsorbent in water process.
Preferably, per 50mL water samples, it is 0.04~0.08g to need the amount of adsorbent.
Advantageous effect：(1) through the modified bamboo charcoal of the method for the invention, as adsorbent in use, to Cr VI
Adsorption efficiency improves；(2) modified bamboo charcoal is environmentally friendly, pollution-free, and modifying process is simple to operation；(3) of the invention
The adsorbent is applied to non-secondary pollution object in water treatment procedure and generates, to no damage to human body.
Specific implementation mode
The content that following embodiment further illustrates the present invention, but should not be construed as limiting the invention.Without departing substantially from
In the case of spirit of that invention and essence, to changing and replacing made by the method for the present invention, step or condition, the present invention is belonged to
Range.Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
The hexavalent chromium solution for taking four parts of 4mg/L adds different adsorbents in the case of ensureing that remaining condition is constant
Amount, observe adsorbent adsorbing hexavalent chromium amount number, details are shown in Table 1.
Table 1
| Initial hexavalent chromium concentration (mg/L) | Quantity of sorbent (g) | Adsorbance (mg/g) | |
| 1 | 4 | 0.04 | 4.375 |
| 2 | 4 | 0.05 | 3.451 |
| 3 | 4 | 0.06 | 3.083 |
| 4 | 4 | 0.08 | 3.131 |
Adsorbance in table 1 refers to unit adsorbance, shows the adsorbent of unit mass and the ratio of adsorbance, from table 1
As it can be seen that the adsorbent that the present invention prepares, is not that quantity of sorbent addition is more, effect is better, needs in view of to absorption
The utilization rate of agent.
Embodiment 2
Take the hexavalent chromium solution of four parts of various concentrations, reference implementation example 1 as a result, adsorbent measures above-mentioned adsorbance result
Best 0.04g, other conditions are constant, and the variation of observation unit's adsorbance, details are shown in Table 2.
Table 2
| Initial hexavalent chromium concentration (mg/L) | Quantity of sorbent (g) | Adsorbance (mg/g) | |
| 1 | 4 | 0.04 | 4.375 |
| 2 | 5 | 0.04 | 5.672 |
| 3 | 6 | 0.04 | 7.864 |
| 4 | 8 | 0.04 | 8.387 |
From 2 result of table as it can be seen that initial concentration is bigger, the result of adsorbance is better.
Embodiment 3
Consider in real life, the hexavalent chromium concentration in sewage will not be too high, takes the Cr VI of four parts of a concentration of 4mg/L molten
Liquid adds the quantity of sorbent 0.04g of phase homogenous quantities, reacts the different time, and other conditions are constant, observe the variation of adsorbance.
Details are shown in Table 3.
Table 3
As seen from Table 3, adsorbent is not to increase as time increases to the adsorbance of Cr VI in solution, most preferably
Reaction time is 180min, more than 180min, due to excessive oscillation so that the Cr VI being adsorbed onto on adsorbent takes off again
It falls, so the reaction time, not the longer the better, therefore 180min is the best adsorption time of adsorbent of the present invention.
Embodiment 4
The waste water for taking the hexavalent chromium concentration of different pH value to be 4mg/L, adds the quantity of sorbent 0.04g of phase homogenous quantities, other
Condition is constant, observes the variation of adsorbance, and details are shown in Table 4.
Table 4
| pH | Quantity of sorbent (g) | Adsorbance (mg/g) | |
| 1 | 4 | 0.04 | 3.033 |
| 2 | 6 | 0.04 | 4.213 |
| 3 | 8 | 0.04 | 4.375 |
| 4 | 10 | 0.04 | 3.241 |
As seen from Table 4, when pH value is 8, adsorbance is maximum.In view of the variation of other parameter, it is believed that reaction condition
PH be it is neutral or close to it is neutral when, the progress most beneficial for adsorbent of the present invention to Cr VI adsorption reaction.
Claims (1)
1. a kind of Cr VI adsorbent, which is characterized in that the adsorbent includes modified bamboo powdered carbon, and the grain size of modified bamboo powdered carbon is not
Less than 60 mesh；The Cr VI adsorbent is made by following methods：（1）Bamboo charcoal is broken for thin block, boil 30 in distilled water ~
It 60 minutes, is cooled to room temperature, is dried 20 ~ 30 hours at 100 DEG C ~ 120 DEG C；（2）By step（1）Obtained bamboo charcoal is broken, polishing,
Bamboo charcoal is screened using the sieve of 60 mesh, obtains bamboo carbon powder, storage is collected and prepares；（3）By Salzburg vitriol and 3-
Aminopropyl trimethoxysilane is successively put into the flask for filling n-hexane, magnetic agitation 30 ~ 60 minutes；（4）By step（2）
Step is added in the bamboo carbon powder of acquisition（3）In the mixed solution of gained, magnetic agitation 18 ~ 20 hours, and through distilled water flushing, super
Sonication and filtering dry at 100 DEG C ~ 120 DEG C the bamboo carbon powder being obtained by filtration to get to adsorbent；Wherein, step
（3）Middle Salzburg vitriol dosage is 2~3g, and 3- aminopropyl trimethoxysilane dosages are 3~4g, and n-hexane dosage is
50mL；Step（4）Middle bamboo carbon powder addition is 3~5g.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610567918.3A CN106179209B (en) | 2016-07-18 | 2016-07-18 | A kind of Cr VI adsorbent and its preparation method and application |
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| CN201610567918.3A CN106179209B (en) | 2016-07-18 | 2016-07-18 | A kind of Cr VI adsorbent and its preparation method and application |
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| CN106179209A CN106179209A (en) | 2016-12-07 |
| CN106179209B true CN106179209B (en) | 2018-11-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61254249A (en) * | 1985-05-02 | 1986-11-12 | Hidefumi Hirai | Reactivation treatment of adsorbent |
| CN102500326A (en) * | 2011-11-07 | 2012-06-20 | 中国科学院广州地球化学研究所 | Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution |
| CN103706332A (en) * | 2013-12-30 | 2014-04-09 | 同济大学 | Bamboo charcoal modification method applicable to oily wastewater treatment |
-
2016
- 2016-07-18 CN CN201610567918.3A patent/CN106179209B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61254249A (en) * | 1985-05-02 | 1986-11-12 | Hidefumi Hirai | Reactivation treatment of adsorbent |
| CN102500326A (en) * | 2011-11-07 | 2012-06-20 | 中国科学院广州地球化学研究所 | Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution |
| CN103706332A (en) * | 2013-12-30 | 2014-04-09 | 同济大学 | Bamboo charcoal modification method applicable to oily wastewater treatment |
Non-Patent Citations (3)
| Title |
|---|
| 改性竹炭对Cr(VI)的吸附性能研究;周发青等;《宁夏工程技术》;20081231;第7卷(第4期);第324-325页 * |
| 改性竹炭对Cr(VI)的吸附性能研究;周发青等;《宁夏工程技术》;20081231;第7卷(第4期);第324页 * |
| 硅烷偶联剂改性凹凸棒土的制备及其吸附Cr6+的性能研究;王志强等;《化工新型材料》;20130630;第41卷(第6期);第84-85页 * |
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