CN103265109B - A kind of manufacture method of modified meerschaum - Google Patents
A kind of manufacture method of modified meerschaum Download PDFInfo
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- CN103265109B CN103265109B CN201310145017.1A CN201310145017A CN103265109B CN 103265109 B CN103265109 B CN 103265109B CN 201310145017 A CN201310145017 A CN 201310145017A CN 103265109 B CN103265109 B CN 103265109B
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- sepiolite
- modified meerschaum
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- reducing bacteria
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a kind of manufacture method of modified meerschaum, relate to field of environment engineering, natural sepiolite is after acidification, and micropore size expands to some extent, and specific surface area increases, and be conducive to the heavy metal in absorption degradation integral treatment device, modified meerschaum is to SO4
2-clearance increases, and consumption reduces, energy-conservation effect can be played, the sepiolite crossed with ion-exchanged produces acidity or the alkalescence of medium tenacity, be conducive in systems in which playing the effect that pH is stablized in buffering water inlet, both the growth conditions of sulphate reducing bacteria had been met, also the stable of water outlet pH value is ensured, tensio-active agent process not only improves the dispersiveness of sepiolite, also forward promotes the growth of sulphate reducing bacteria, accelerate the organism reduced sourness in waste water of mine, improve the governance efficiency of integral treatment device, be separated through heated and stirred after product, the dry sepiolite product that can obtain ultrafining treatment.
Description
Technical field
The present invention relates to field of environment engineering, particularly relate to a kind of manufacture method of modified meerschaum.
Background technology
Immobilized microorganism technique be by elite Microorganism incubation on the carrier chosen, make its highly dense and keep biological activity, the biotechnology can bred fast, in a large number under optimum conditions.This technology is applied to various wastewater treatment, be conducive to the concentration improving microorganism (especially the microorganism of specific function) in bio-reactor, be conducive to the impact of microorganism opposing adverse environment, be conducive to reacted solid-liquid separation, shorten the time needed for process.Process acid mine water, topmost microorganism is sulphate reducing bacteria.Used carrier is also a variety of, common are very much: gac, corn cob, haydite, zeolite, coal gangue, tire debris, Wingdale, clay mineral etc.Although obtain and low price common in these carrier reality, after practicality, all bad recycling, creates secondary pollution to environment.
Sepiolite can as the carrier of sulphate reducing bacteria for the treatment of integral treatment device, because its cost is low, and excellent adsorption, and it is strong to explain ability by oneself, secondary pollution is little, and sepiolite absorption speed is fast and become flocculence simultaneously, and plasticity-is good; A series of change can be there is after being heated, good lagging material can be done.But natural sepiolite surface acidity is weak, and passage is little, and thermostability is bad, catalyzed reaction ability is poor, more weak to the adsorptive power of the heavy metal in integral treatment device.
Summary of the invention
Technical problem to be solved of the present invention is to provide the method improving natural sepiolite, the adsorptive power of modified sepiolite is improved, can strain domestication, spread cultivation after fully contact with the material dropped into, and improve the ability of modified meerschaum Adsorption of Heavy Metals by modification.
In order to realize object of the present invention, the manufacture method of a kind of modified meerschaum provided by the invention, comprises the steps:
1) acidification: make acidification natural sepiolite with the hydrochloric acid of 15%-17%;
2) ion-exchanged: use 8%-12%NaCl solution soaking;
3) surface treatment agent modification is added: carry out surface treatment with cats product;
4) ammoniacal liquor is mineral modified: 2%-4% ammonia soln immersion treatment;
5) heating, stir: adding in reactor after sepiolite and water mixing, at 453K-473K temperature, stirring 1-2h.
Preferably, the temperature of described acidification is 453K-473K.
Preferably, the soak time of described ion-exchanged is 22-25h.
Preferably, described cats product is cetyl trimethyl chlorine bromine ammonium.
Beneficial effect of the present invention is:
Sepiolite is after acidification, and micropore size expands to some extent, and specific surface area increases, and is conducive to absorption degradation SO
4 2-, to Cd
2+, Pb
2+, Cu
2+, Fe
3+absorption property in heavy metal also increases, and reduce to some extent with the time of the sepiolite of sour modification not only Adsorption of Heavy Metals, the unmodified sepiolite of equal in quality is compared with modified meerschaum, and modified meerschaum is to SO
4 2-clearance increases, and consumption reduces, energy-conservation effect can be played, the sepiolite crossed with ion-exchanged produces acidity or the alkalescence of medium tenacity, be conducive in systems in which playing the effect that pH is stablized in buffering water inlet, maintenance system pH value, between 7.0-7.8, had both met the growth conditions of sulphate reducing bacteria, also ensured the stable of water outlet pH value.Tensio-active agent not only improves the dispersiveness of sepiolite, goes back the growth that forward promotes sulphate reducing bacteria, accelerates the organism reduced sourness in waste water of mine, improve the governance efficiency of integral treatment device.Through the sepiolite product that heated and stirred after product is separated, drying can obtain ultrafining treatment.
At the temperature of 453K-473K, acidification can reach best effect, ion-exchange immersion treatment is that 22-25h can maintain system pH value between 7.0-7.8, keep suitable potential of hydrogen, cetyl trimethyl chlorine bromine ammonium is not only free from side effects to sulphate reducing bacteria, all right forward promotes the growth of sulphate reducing bacteria, mentions its metabolic activity, accelerates the organism reduced sourness in waste water of mine.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the manufacture method of a kind of modified meerschaum of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
See Fig. 1, a kind of manufacture method of modified meerschaum, comprises the steps:
Acidification: although the treatment mechanism of different strong acid to sepiolite is identical, but compare nitric acid, the result of sulfuric acid and hydrochloric acid, the effect of hydrochloric acid is best, and the concentration of the adsorptive power of sepiolite and acid activation hydrochloric acid used has very big relation, acid concentration is excessive or too smallly all will affect the performance of sepiolite, at the temperature of 453K-473K, acidification is carried out to sepiolite with 15%-17% hydrochloric acid, result shows that the sepiolite pore structure after processing there occurs change, original micro-pore diameter expands, surface-area enlarges markedly, the micropore of general porous material is more, its specific surface area is larger.Sepiolite is after acidification, and the expansion of partial pore is long makes its reference area increase.Therefore sepiolite porosity is the important factor determining specific surface area size.Because specific surface area increases, sepiolite is to SO
4 2-removal and Cd
2+, Pb
2+, Cu
2+, Fe
3+in heavy metal, absorption property also increases; And the experiment proved that, the unmodified sepiolite Adsorption of Heavy Metals time used substantially reaches adsorption equilibrium state after 1.5h, clearance is higher than 97%, and reduce to some extent with the time of the sepiolite of sour modification not only Adsorption of Heavy Metals, and under same clearance, modified meerschaum amount used reduces to some extent, reaches energy-conservation object.
Ion-exchanged: soak sepiolite 22-25h by the NaCl solution of 8%-12%, result shows to adopt low valence metal ion sodium ion, by introducing sodium ion, makes sepiolite produce highly basic center, but amount appropriateness.Such maintenance pH value, between 7.0-7.8, had both met the growth conditions of sulphate reducing bacteria, also ensured the stable of water outlet pH value.Replace the magnesium ion in sepiolite skeleton with metal ion, sepiolite can be made to produce acidity or the alkalescence of medium tenacity, but do not change its structure.Because potential of hydrogen scope is little, in the adaptable scope of sulphate reducing bacteria, so feasible.
Adding surface treatment agent modification: for improving the dispersiveness of sepiolite, reducing the generation of secondary structure, improve material interface bonding, improve the flocculence of modified meerschaum in water, experimental selection adds surface treatment agent and carries out modification to sepiolite.Principle utilizes the acid activity center on surface and active Si-OH group.Select cats product cetyl trimethyl chlorine bromine ammonium, this tensio-active agent is not only free from side effects to sulphate reducing bacteria, all right forward promotes the growth of sulphate reducing bacteria, mention its metabolic activity, accelerate the organism reduced sourness in waste water of mine, both reached the effect of mud decrement and control water outlet COD, the improvement speed of integral treatment device can also have been promoted.
Ammoniacal liquor is mineral modified: the sepiolite micro-pore diameter modified through diluted acid increases, mesopore increasing number, then after adding proper ammonia (state concentration 25%-28%), can improve the surface acidity of sepiolite, and pore structure is adjusted in various degree.Because acidity is not suitable for the growth of sulphate reducing bacteria, institute's dosage is limited, therefore the ammonia soln of selection 2%-4%.
Heating, stirring: adding in reactor after sepiolite and water mixing, (453K-473K) stirred for several hour at a certain temperature, the sepiolite product of ultrafining treatment can be obtained after product separation, drying, but stirring velocity is unsuitable too fast, otherwise can destroy the fibrous bundle in sepiolite.
Based on above-mentioned, beneficial effect of the present invention is: sepiolite is after acidification, and micropore size expands to some extent, and specific surface area increases, and is conducive to absorption degradation SO
4 2-, to Cd
2+, Pb
2+, Cu
2+, Fe
3+in heavy metal, absorption property also increases, and reduce to some extent with the time of the sepiolite of sour modification not only Adsorption of Heavy Metals, the unmodified sepiolite of equal in quality is compared with modified meerschaum, and modified meerschaum is to SO
4 2-clearance increases, and consumption reduces, energy-conservation effect can be played, the sepiolite crossed with ion-exchanged produces acidity or the alkalescence of medium tenacity, be conducive in systems in which playing the effect that pH is stablized in buffering water inlet, maintenance system pH value, between 7.0-7.8, had both met the growth conditions of sulphate reducing bacteria, also ensured the stable of water outlet pH value.Tensio-active agent not only improves the dispersiveness of sepiolite, goes back the growth that forward promotes sulphate reducing bacteria, accelerates the organism reduced sourness in waste water of mine, improve the governance efficiency of integral treatment device.Through the sepiolite product that heated and stirred after product is separated, drying can obtain ultrafining treatment.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.
Claims (1)
1. a manufacture method for modified meerschaum, comprises the steps:
1) acidification: the HCl with 15 ~ 17% makes acidification natural sepiolite;
2) ion-exchanged: by 8 ~ 12%NaCl solution soaking through step 1) process the sepiolite obtained;
3) surface treatment agent modification is added: with cats product to step 2) process the sepiolite that obtains and carry out surface treatment, cats product is cetyl trimethyl chlorine bromine ammonium;
4) ammoniacal liquor is mineral modified: by 2 ~ 4% ammonia soln immersion treatment steps 3) process the sepiolite obtained;
5) heat, stir: finally step 4) process the sepiolite that obtains and water mixing after add in reactor, at 453 ~ 473K temperature, stir 1 ~ 2h;
Wherein, the temperature of acidifying is 453 ~ 473K; The soak time of ion-exchanged is 22 ~ 25h.
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| CN105332277B (en) * | 2015-10-30 | 2017-10-24 | 深圳市联兴商贸实业有限公司 | A kind of special sepiolite fibre of papermaking and preparation method thereof |
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| CN108745317A (en) * | 2018-06-19 | 2018-11-06 | 黄益良 | A kind of Polymer sewage treatment agent and preparation method thereof |
| CN109265745A (en) * | 2018-09-11 | 2019-01-25 | 山西山明环保科技有限公司 | A kind of modified montmorillonoid, preparation method and composite material |
| CN109569500B (en) * | 2018-12-13 | 2021-02-09 | 苏州大学 | Microorganism-loaded acid-modified sepiolite biological nanocomposite and preparation method and application thereof |
| CN110903058B (en) * | 2019-11-30 | 2020-10-27 | 乐清市智格电子科技有限公司 | High-waterproof corrosion-resistant concrete and preparation method thereof |
| CN111011118A (en) * | 2019-12-30 | 2020-04-17 | 安徽美迪生态农业有限公司 | Cultivation method of ivy |
| CN112439384A (en) * | 2020-10-31 | 2021-03-05 | 湘潭大学 | Modified preparation method of low-grade sepiolite for synchronously removing nitrogen and phosphorus |
| CN113443857A (en) * | 2021-07-26 | 2021-09-28 | 石家庄易辰防火保温材料有限公司 | Fireproof sepiolite fiber slurry and preparation method thereof |
| CN115090256B (en) * | 2022-06-22 | 2023-08-18 | 兰州理工大学 | Sodium-sulfate modified sepiolite and modification method and application thereof |
| CN116730466A (en) * | 2023-06-16 | 2023-09-12 | 上海永丰热镀锌有限公司 | Iron removal purification treatment process for hot galvanizing acid rinsing wastewater |
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Effective date of registration: 20220616 Address after: 266000 No. 3366, Kaicheng Road, Zhuhai sub district office, Huangdao District, Qingdao, Shandong Patentee after: QINGDAO ZHONGXIANG ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 230051 room 2407, block C, Jiaqiao International Plaza, Hefei, Anhui Patentee before: Hefei Tingyi Environmental Protection Technology Co.,Ltd. Effective date of registration: 20220616 Address after: 230051 room 2407, block C, Jiaqiao International Plaza, Hefei, Anhui Patentee after: Hefei Tingyi Environmental Protection Technology Co.,Ltd. Address before: 241000 No. 166, Changjiang South Road, national high tech Industrial Development Zone, Wuhu City, Anhui Province Patentee before: ANHUI POLYTECHNIC University |
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