CN102951696A - Application of modified activated carbon in sewage treatment - Google Patents
Application of modified activated carbon in sewage treatment Download PDFInfo
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- CN102951696A CN102951696A CN2012104849653A CN201210484965A CN102951696A CN 102951696 A CN102951696 A CN 102951696A CN 2012104849653 A CN2012104849653 A CN 2012104849653A CN 201210484965 A CN201210484965 A CN 201210484965A CN 102951696 A CN102951696 A CN 102951696A
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Abstract
The invention discloses an application of modified activated carbon in sewage treatment. The application is characterized in that the modified activated carbon is selected from activated carbon treated with hydrochloric acids and nitric acids of different concentrations, or treated at a high temperature. After the activated carbon used in the invention is treated with hydrochloric acids and nitric acids of different concentrations at different temperatures for a certain period of time, the adsorption capability of activated carbon powder is increased remarkably, and a good treatment effect on sewage containing rhodamine B serving as a dye is achieved particularly.
Description
Technical field
The invention belongs to field of Environment Protection, relate in particular to and use the application of modified activated carbon in sewage disposal.
Background technology
The harm that develops rapidly environment of dyestuff and printing and dyeing industry is on the rise.Waste water from dyestuff has that kind is many, complicated component, colourity is dark, toxicity is large, organic pollutant content is high and be difficult to the characteristics such as biological degradation, is one of waste water of the present several refractories reasons of China.Rhodamine B is a kind of matching stain, is a kind of polycyclic aromatic hydrocarbons organic compound, belongs to the persistence Persistent organic pollutants, this class synthetic organic dye, can pollute being subjected to water body to produce larger Organic, with making the unjoyful shades of colour of people, the ecosystem of water body be brought larger destruction.
Gac is flourishing as the internal void structure, specific surface area is large, the good sorbing material of high adsorption capacity; be widely used in the every field such as chemical industry, metallurgy, military protection and environment protection, especially in the to protect mankind living environment, bringing into play more and more important effect.Activated carbon product is of a great variety, can be divided into granulated active carbon, powdered carbon and other shape gacs (such as activated carbon fiber, active carbon cloth, Alveolate activated carbon capable etc.) by face shaping.
In application facet, external gac is used for field of environment protection, particularly water treatment and purifying air aspect in a large number, the domestic traditional industries such as medicine, food, chemical that then are mainly used in, and the scope of application is narrower and not general.Therefore, traditional sorbent material is carried out modification or the research and development capacity is high, performance is excellent product innovation will be the inevitable development trend of China's gac industry.
The absorption property of gac is mainly determined by its pore texture and surface chemical property two aspects, and it is carried out the main path that surface modification is raising adsorptive power and utilization ratio.Gac after the same terms is processed has obvious difference for the absorption property of different dyes, therefore, need reach the optimal adsorption effect, will for different materials and requirement, gac be activated and surface modification accordingly.
Summary of the invention
The present invention relates to the application of a kind of modified activated carbon in sewage disposal, it is characterized in that described modified activated carbon is selected from the gac that adopts hydrochloric acid, nitric acid or pyroprocessing.
In a preferred embodiment of the present invention, described sewage is dyestuff and printing and dyeing industry, and described sewage contains dyestuff.
In a preferred embodiment of the present invention, comprise rhodamine B in the described dyestuff.
In a preferred embodiment of the present invention, described modified activated carbon is selected from the combination of a kind of in following three kinds or two kinds or three kinds:
Take by weighing activity charcoal powder, adding concentration is the HCl solution of 0.4-6.0mol/L, and stirring at normal temperature is processed certain hour, will be washed till neutrality with the distillation poach through the gac that HCl processes, then oven dry;
Take by weighing activity charcoal powder, adding concentration is the HN0 of 4.0-10.0mol/L
3Solution, stirring at normal temperature is processed certain hour, will be through HNO
3The gac of processing is washed till neutrality with the distillation poach, then oven dry;
Take by weighing activity charcoal powder, processed gac 4 hours at retort furnace, treatment temp is between 200-600 ℃.
The present invention also relates to the application of modified activated carbon in the absorption rhodamine B on the other hand.
Gac used in the present invention is behind different concns hydrochloric acid, nitric acid and treatment of different temperature certain hour, and the adsorptive power of activity charcoal powder increases to some extent, has preferably effect for the sewage disposal that contains the dyestuff rhodamine B.
Embodiment
The present invention mainly carries out modification by the kind, concentration and the treatment temp that change acid to two kinds of gacs, by relatively be untreated and the gac of different condition after processing to the absorption of dye wastewater rhodamine B solution, obtained rhodamine B solution is had the modified active powdered carbon of very strong adsorption effect.
1. the processing of activity charcoal powder
Take by weighing 3 parts of activity charcoal powders (5g), add respectively hydrochloric acid (HCl) solution of 30mL different concns, stirring at normal temperature was processed 4 hours, will be washed till neutrality with the distillation poach through the acid-treated gac of salt, and then oven dry gets the 2-4 sample for subsequent use; With nitric acid (HNO
3) replacing hydrochloric acid, the processing gac that uses the same method gets the 5-7 sample for subsequent use; Take by weighing 4 parts of activity charcoal powders (5g), different temperature (200 ℃, 300 ℃, 400 ℃, 500 ℃, 600 ℃) is set in retort furnace processed gac 4 hours, get the 8-12 sample for subsequent use.
2. the activity charcoal powder of different methods processing is to the adsorptive power of rhodamine B solution
The adsorption effect of adsorption rate (E) expression gac rhodamine B solution is adopted in this experiment.
The calculation formula of adsorption rate:
E％＝(A-A
0)/A×100％
Wherein, the absorbance of rhodamine B solution when A is initial, A
0It is the absorbance of the rhodamine B solution after charcoal absorption.
Accurately take by weighing the untreated activity charcoal powder of 20mg (No. 1), and with the activity charcoal powder (2-12 number) of different concns hydrochloric acid, nitric acid or treatment of different temperature, adding respectively 30mL concentration is the rhodamine B solution of 50mg/L, stirring at normal temperature is processed certain hour, after the centrifugation, measure the absorbancy (A) of clear liquid in the maximum absorption wave strong point, calculate its degradation rate (E%), the effect of absorption rhodamine B solution after relatively these several treatment processs are processed activity charcoal powder.
For activity charcoal powder, the situation of its absorption rhodamine B solution is along with the difference of activated carbon treatment method has larger difference.
Activity charcoal powder is after different concns hydrochloric acid, nitric acid or treatment of different temperature, and its adsorptive power all has raising in various degree.
Through different concns salt acid treatment certain hour, the adsorptive power of activity charcoal powder improves more than 3 times, and the adsorptive power of activity charcoal powder is relatively good in low strength range, and along with the increase of concentration of hydrochloric acid has by a small margin reduction trend; Through different concns nitric acid treatment certain hour, the adsorptive power of activity charcoal powder improves more than 3 times, and in low strength range, the adsorption effect of activity charcoal powder is relatively good, and along with the increase of concentration of nitric acid has obvious reduction trend; After treatment of different temperature, the adsorptive power of activity charcoal powder improves 3-4 doubly, and along with the raising for the treatment of temp, its adsorptive power increases to some extent.
Use a kind of commercially available undressed activity charcoal powder, in the time of 60 minutes the adsorption rate of 30mL 50mg/L rhodamine B solution is lower than 25%, and in the activity charcoal powder after certain condition is processed that the present invention obtains, 5 kinds of activity charcoal powders adsorption rate to rhodamine B solution in the time of 60 minutes reaches more than 85%, and wherein 2 kinds of activity charcoal powders adsorption rate to rhodamine B solution in the time of 60 minutes surpasses 95%.
When being understood that; specific embodiments of the invention only are the purposes of property explanation presented for purpose of illustration; it limits protection scope of the present invention never in any form; those skilled in the art can be improved or conversion according to the above description, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (4)
1. the application of modified activated carbon in sewage disposal is characterized in that described modified activated carbon is selected to adopt hydrochloric acid, nitric acid and/or be the gac of pyroprocessing.
2. application according to claim 1, described sewage are dyestuff and printing and dyeing industry, and described sewage contains dyestuff.
3. application according to claim 2 comprises rhodamine B in the described dyestuff.
4. according to claim 1-3 described application of any one, described modified activated carbon are selected from the combination of a kind of in following three kinds or two kinds or three kinds:
Take by weighing activity charcoal powder, adding concentration is the HCl solution of 0.4-6.0mol/L, and stirring at normal temperature is processed certain hour, will be washed till neutrality with the distillation poach through the gac that HCl processes, then oven dry;
Take by weighing activity charcoal powder, adding concentration is the HNO of 4.0-10.0mol/L
3Solution, stirring at normal temperature is processed certain hour, will be through HNO
3The gac of processing is washed till neutrality with the distillation poach, then oven dry;
Take by weighing activity charcoal powder, retort furnace process gac 4 hours or more than, treatment temp is between 200-600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104849653A CN102951696A (en) | 2012-11-16 | 2012-11-16 | Application of modified activated carbon in sewage treatment |
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| CN2012104849653A CN102951696A (en) | 2012-11-16 | 2012-11-16 | Application of modified activated carbon in sewage treatment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9499414B1 (en) | 2015-04-30 | 2016-11-22 | King Fahd University Of Petroleum And Minerals | Method of dye removal from wastewater |
| CN106430189A (en) * | 2016-10-26 | 2017-02-22 | 山西新华化工有限责任公司 | Preparation method of efficient water purifying activated carbon |
| CN107162077A (en) * | 2017-07-03 | 2017-09-15 | 界首市菁华科技信息咨询服务有限公司 | A kind of aluminium manufacturer's sewage water treatment method |
| CN107321305A (en) * | 2017-06-29 | 2017-11-07 | 湖南农业大学 | The preparation method of southern reed base modification biological charcoal and southern reed base modification biological charcoal and application |
| CN111170503A (en) * | 2020-01-03 | 2020-05-19 | 中南大学 | Method for treating and recycling chromium and ammonia nitrogen in electroplating wastewater |
| CN113896195A (en) * | 2021-11-15 | 2022-01-07 | 清华大学 | High-performance VOCs adsorption carbon obtained by using waste and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9499414B1 (en) | 2015-04-30 | 2016-11-22 | King Fahd University Of Petroleum And Minerals | Method of dye removal from wastewater |
| CN106430189A (en) * | 2016-10-26 | 2017-02-22 | 山西新华化工有限责任公司 | Preparation method of efficient water purifying activated carbon |
| CN107321305A (en) * | 2017-06-29 | 2017-11-07 | 湖南农业大学 | The preparation method of southern reed base modification biological charcoal and southern reed base modification biological charcoal and application |
| CN107162077A (en) * | 2017-07-03 | 2017-09-15 | 界首市菁华科技信息咨询服务有限公司 | A kind of aluminium manufacturer's sewage water treatment method |
| CN107162077B (en) * | 2017-07-03 | 2018-06-29 | 界首市菁华科技信息咨询服务有限公司 | A kind of aluminium manufacturer's sewage water treatment method |
| CN111170503A (en) * | 2020-01-03 | 2020-05-19 | 中南大学 | Method for treating and recycling chromium and ammonia nitrogen in electroplating wastewater |
| CN113896195A (en) * | 2021-11-15 | 2022-01-07 | 清华大学 | High-performance VOCs adsorption carbon obtained by using waste and preparation method thereof |
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Application publication date: 20130306 |