CN100448524C - Method for producing inorganic modified bentonite chromium remover - Google Patents
Method for producing inorganic modified bentonite chromium remover Download PDFInfo
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- CN100448524C CN100448524C CNB2007100108228A CN200710010822A CN100448524C CN 100448524 C CN100448524 C CN 100448524C CN B2007100108228 A CNB2007100108228 A CN B2007100108228A CN 200710010822 A CN200710010822 A CN 200710010822A CN 100448524 C CN100448524 C CN 100448524C
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- bentonite
- base bentonite
- calcium base
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Abstract
The invention is concerned with the production of reagent for chromium removing to inorganic modified bentonite and it is a production of inorganic sorbent. Bath, purify, drying and crush the raw ore of calcium base bentonite to get refined calcium base bentonite. Confect a solution of soluble salt in 5 to 30 percent quality concentration. Mix and stir pulverized active carbon, the solution of soluble salt and calcium base bentonite for 5 to 15 min and stay for 10 to 30 min. Put the disposed mixture into muffle furnace and heat to 360 to 420 degree with the speed of 10 to 30 degree/ min and bake for 1 to 2 h at the temperature. Crush with disintegrator and get the production. This production mainly gets rid of the surface complexation and static adsorption, and the adsorbed Cr (VI) contamination is steady without making pollution at the second time.
Description
Technical field
The present invention relates to a kind of manufacture method of inorganic adsorbent, particularly relating to a kind of inorganic salts is modifier adds the carbon modification by calcination to calcium-base bentonite method.
Background technology
At present, known bentonite inorganic method of modifying mainly contains sour modification, salt modification, modification by calcination etc.Can be used as adsorbent through inorganic modified bentonite is applied in the water body and soil of inorganic or organic contamination, it is with low cost, the specific activity carbon adsorbent has bigger price advantage, but the bentone adsorbent by above inorganic modified method preparation can produce the suspension that is difficult to sedimentation, Separation of Solid and Liquid operation easier after the increase water treatment.Simultaneously, the Cr pollutant removals such as (VI) that exceeds hundred times of Cr (III) for toxicity is not good enough, and has secondary pollution problems.
Summary of the invention
The object of the present invention is to provide a kind of inorganic salts is modifier adds the carbon modification by calcination to calcium-base bentonite method, this method is purified the bentonite raw ore, dry, pulverize through washing earlier, get the redistilled calcium base bentonite, again calcium-base bentonite and a kind of inorganic salts are added the carbon modification by calcination under uniform temperature, certain hour, the chromium remover that the present invention makes has the good adsorption performance.
The objective of the invention is to be achieved through the following technical solutions:
A kind of manufacture method of inorganic modified bentonite chromium remover, this method comprises the steps: 1) the raw ore of calcium base bentonite washing is purified, dries, pulverized, get the redistilled calcium base bentonite; 2) the preparation mass concentration is 5～30% inorganic salt solution Al
2(SO
4)
33) will cross active carbon, the inorganic salt solution Al of 100～200 mesh sieves
2(SO
4)
3Mix with the redistilled calcium base bentonite, stir 5～15min, leave standstill 10～30min; 4) mixture after will leaving standstill is put into Muffle furnace, is elevated to 360～420 ℃ with 10～30 ℃/min speed, at this roasting temperature 1～2h; 5) utilize pulverizer to pulverize, can obtain the chromium remover product of required particle diameter.
The manufacture method of aforesaid a kind of inorganic modified bentonite chromium remover, its oven dry are to be to carry out under 85～105 ℃ in temperature.
Advantage of the present invention and effect are:
1. chromium remover of the present invention has chromium (VI) clearance higher, and Separation of Solid and Liquid is easy, non-secondary pollution; Its reaction raw materials is cheap to be easy to get, and preparation method's step is few, handling safety, and energy consumption is little, and the cycle is short.
2. mainly based on surface complexation effect and electrostatic adsorption, the Cr that is adsorbed (VI) pollutant is difficult for reactivation and forms secondary pollution highly stable chromium remover of the present invention to the removal of Cr (VI).
The specific embodiment
Earlier that the elution of bentonite origin mineral water is pure, oven dry, pulverize, get the redistilled calcium base bentonite, active carbon, soluble-salt solution and the redistilled calcium base bentonite of crossing 100～200 mesh sieves are pressed corresponding proportion to be mixed, stir 5～15min, leave standstill 10～30min, mixture after will leaving standstill is at last put into Muffle furnace temperature to the 360～420 ℃ following roasting 1～2h that raises gradually, pulverizes the chromium remover product of the present invention that can obtain required particle diameter through pulverizer again.
Determining of roasting time of the present invention to remove the calcium-base bentonite surface water, to be principle in conjunction with the impurity in water and the space, roasting time is long, can make bentonite laminated structure sintering, accumulation, porosity and aperture have been reduced on the contrary, absorption property reduces, increase processing cost again, determine that therefore roasting time is 1～2h.
Relate to roasting calcium-base bentonite under different temperatures among the present invention, can successively lose in surface water, water of hydration and the skeleton in conjunction with water, increase specific area, reduce the absorption resistance of moisture film to Cr (VI).The roasting calcium-base bentonite had both been driven away the surface water in the structure channel in the time of 360～420 ℃, unlikely again destruction skeleton structure, and absorption property improves; When surpassing 360～420 ℃, will lose gradually in conjunction with water, the OH-structural framework breaks, the structure destruction of favourable absorption.What therefore, sintering temperature was best is 360～420 ℃.
The inorganic salts that relate among the present invention are as a kind of modifier, the Al that provides
3+Exchanged the low price cation in the calcium-base bentonite, reduced negative electrical charge between the montmorillonite lattice, thereby reduced bentonite Cr (VI) anion electrostatic repulsion.Simultaneously, inorganic salts play bridge linking effect as electrolyte between modified alta-mud and Cr (VI) anion.Consider factors such as removal effect, cost, therefore, what the inorganic salts dosage was best is that every 100g calcium-base bentonite adds 5～30g.
A series of reaction takes place at high temperature by steam and dioxygen oxidation in the active carbon that the present invention relates to, and produces CO, CO
2, H
2Deng gas, these gas high temperature expand when overflowing, and produce very little hole in bentonite, further increase bentonitic specific area, and absorption property is improved.Simultaneously, adding only needs a short time leave standstill just after the adsorbent water treatment of active carbon roasting preparation to realize Separation of Solid and Liquid, has solved the big difficult problem of Separation of Solid and Liquid difficulty after traditional method of modifying water treatment.But when the active carbon too high levels, can make the bentonite aperture become big, short texture is frangible, and Cr (VI) absorption property is reduced.Preferably the active carbon dosage is that every 100g calcium-base bentonite adds 1～5g.
By following embodiment the present invention is further specified.
Get the 6.5L deionized water and put into the round plastic bucket that volume is 12L, under agitation slowly add 1000g bentonite raw ore, behind the stirring pulping, soak 24h.After stirring 15min, add water 3.5L, continue making beating 10min, leave standstill 4h, remove bottom impurity.The top suspension slurry of sucking-off impurity stirs 15min, leaves standstill 8h, separates thick soil.Top suspension slurry behind the thick soil of sucking-off, stir 15min, leave standstill 12h, isolate middle soil, at last the top suspension slurry (smart soil) behind the soil in the sucking-off is left standstill, behind the sucking-off supernatant liquor, remaining mud places in the pallet and dries in drying box under 95 ℃, pulverizes with pulverizer, crosses 80 mesh sieves, promptly get the redistilled calcium base bentonite, productive rate is 56%.With active carbon 3g, the concentration of crossing 200 mesh sieves 25% Al
2(SO
4)
3Solution 100ml and redistilled calcium base bentonite 100g press corresponding proportion and mix, and stir 10min, leave standstill 30min, put it in the Muffle furnace then, be elevated to 420 ℃ with 30 ℃/min speed,, pulverize the chromium remover product of the present invention that can obtain required particle diameter through pulverizer at this roasting temperature 2h.
Adopting 10g80 order chromium remover product of the present invention is that 13.5 ℃, pH are that concentration is that Cr (VI) removal effect of 1mg/L is better in 7.5 the 1L water to temperature, clearance reaches 98.21%, handle back Cr (VI) concentration and reach quality of groundwater III class standard, and have advantages such as Separation of Solid and Liquid is easy, non-secondary pollution, in contaminated soil and underground water reparation, application promise in clinical practice will be arranged.
Claims (2)
1. the manufacture method of an inorganic modified bentonite chromium remover is characterized in that this method comprises the steps: 1) the raw ore of calcium base bentonite washing is purified, dries, pulverized, get the redistilled calcium base bentonite; 2) the preparation mass concentration is 5～30% inorganic salt solution Al
2(SO
4)
33) will cross active carbon, the inorganic salt solution Al of 100～200 mesh sieves
2(SO
4)
3Mix with the redistilled calcium base bentonite, stir 5～15min, leave standstill 10～30min; 4) mixture after will leaving standstill is put into Muffle furnace, is elevated to 360～420 ℃ with 10～30 ℃/min speed, at this roasting temperature 1～2h; 5) utilize pulverizer to pulverize, can obtain the chromium remover product of required particle diameter.
2. the manufacture method of a kind of inorganic modified bentonite chromium remover according to claim 1 is characterized in that described oven dry is is to carry out under 85～105 ℃ in temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100108228A CN100448524C (en) | 2007-04-03 | 2007-04-03 | Method for producing inorganic modified bentonite chromium remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100108228A CN100448524C (en) | 2007-04-03 | 2007-04-03 | Method for producing inorganic modified bentonite chromium remover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101073763A CN101073763A (en) | 2007-11-21 |
| CN100448524C true CN100448524C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100108228A Expired - Fee Related CN100448524C (en) | 2007-04-03 | 2007-04-03 | Method for producing inorganic modified bentonite chromium remover |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850238B (en) * | 2009-12-31 | 2012-08-08 | 南京大学 | Modified montmorillonite as well as preparation method and application thereof |
| WO2015062150A1 (en) * | 2013-11-04 | 2015-05-07 | 尹无忌 | Modified bentonite for ecological environment recovery and application method for same |
| CN106076249B (en) * | 2016-06-13 | 2019-03-29 | 环境保护部南京环境科学研究所 | A kind of method of modified alta-mud preparation heavy metal particles adsorbent |
| CN106861610A (en) * | 2017-04-12 | 2017-06-20 | 明光市国星凹土有限公司 | A kind of preparation method containing bentone adsorbent |
Citations (4)
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|---|---|---|---|---|
| US3859210A (en) * | 1971-07-19 | 1975-01-07 | Asa E Hatch | Removal of heavy metals from aqueous solutions |
| CN1594221A (en) * | 2004-06-30 | 2005-03-16 | 潘俊明 | Micropore ceramic water-saving irrigation device |
| CN1751992A (en) * | 2005-07-23 | 2006-03-29 | 桂林矿产地质研究院 | Modified bentonite used for treating garbage percolate and its manufacturing method |
| CN1752048A (en) * | 2005-07-23 | 2006-03-29 | 桂林矿产地质研究院 | Modified bentonite chromium remover and its manufacturing method |
-
2007
- 2007-04-03 CN CNB2007100108228A patent/CN100448524C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859210A (en) * | 1971-07-19 | 1975-01-07 | Asa E Hatch | Removal of heavy metals from aqueous solutions |
| CN1594221A (en) * | 2004-06-30 | 2005-03-16 | 潘俊明 | Micropore ceramic water-saving irrigation device |
| CN1751992A (en) * | 2005-07-23 | 2006-03-29 | 桂林矿产地质研究院 | Modified bentonite used for treating garbage percolate and its manufacturing method |
| CN1752048A (en) * | 2005-07-23 | 2006-03-29 | 桂林矿产地质研究院 | Modified bentonite chromium remover and its manufacturing method |
Non-Patent Citations (6)
| Title |
|---|
| Molybdate sorption by hydroxy-aluminiumtreated montmorillonite. N. Peinemann, et al.Applied Clay Science,Vol.8 . 1994 |
| Molybdate sorption by hydroxy-aluminiumtreated montmorillonite. N. Peinemann, et al.Applied Clay Science,Vol.8 . 1994 * |
| 膨润土增孔复合颗粒对Cr6+的吸附和抗菌性能研究. 陈继浩等.非金属矿，第29卷第5期. 2006 |
| 膨润土增孔复合颗粒对Cr6+的吸附和抗菌性能研究. 陈继浩等.非金属矿，第29卷第5期. 2006 * |
| 钠、铝改造型膨润土对溶液中Cr(VI)吸附及其机理研究. 孙胜龙等.水处理技术，第25卷第5期. 1999 |
| 钠、铝改造型膨润土对溶液中Cr(VI)吸附及其机理研究. 孙胜龙等.水处理技术，第25卷第5期. 1999 * |
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| CN101073763A (en) | 2007-11-21 |
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