CN1323941C - Modified bentonite used for treating garbage percolate and its manufacturing method - Google Patents
Modified bentonite used for treating garbage percolate and its manufacturing method Download PDFInfo
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- CN1323941C CN1323941C CNB2005100213441A CN200510021344A CN1323941C CN 1323941 C CN1323941 C CN 1323941C CN B2005100213441 A CNB2005100213441 A CN B2005100213441A CN 200510021344 A CN200510021344 A CN 200510021344A CN 1323941 C CN1323941 C CN 1323941C
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Abstract
The present invention discloses modified bentonite used for treating garbage percolate, and a manufacturing method thereof. The manufacturing method has the following steps that 1) raw ores of bentonite is pulverized and is prepared into slurry by mixing with water; 2) soluble salt is dissolved in water and is uniformly stirred to obtain soluble salt solution with 5 to 60% of mass concentration; 3) the soluble salt solution is added to the bentonite slurry liquid and is thoroughly mixed; then the pH value of the obtained mixed solution is regulated between 5 and 9, and the mixed solution is aged; 4) after the aging, the mixed solution is heated to a temperature of 60 to 100 DEG C for further reaction, and the heating reaction time is within 8 to 24 hours; 5) after the heating, the mixed solution is dried to obtain the modified bentonite used for treating garbage percolate. The absorbance for the garbage percolate of the modified bentonite is decreased by more than 90%, and the COD<cr> removal rate is increased to 65.8%; the present invention is very suitable for treating the garbage percolate.
Description
(1) technical field:
The present invention relates to a kind of mineral material, particularly a kind of modified alta-mud that can be used for the treating refuse percolate the invention still further relates to this method for preparation of modified alta-mud.
(2) background technology:
City garbage percolate is the secondary pollutant that is produced in the garbage loading embeading process, is that a kind of color is greyish black, the organic waste water of the high density of foul smelling smell and complicated component.The main source of its generation is: the infiltration of (1) precipitation and snowfall, and it is the main source that percolate produces; (2) inflow of outside surface water comprises rainwash and surface irrigation; (3) the percolate water level is lower than groundwater level outside the venue in landfill yard, and when seepage control system not being set, underground water just might infiltrate in the landfill yard; (4) the contained moisture of rubbish itself; (5) moisture that in degradation process, produces of rubbish.Colourity＞2000 of general city garbage percolate times, the content of wherein organic concentration and various poisonous metals is also very high, and the content of COD is generally 1200～45000mg/L, and the storage period of percolate is long more, and the difficulty that reduces COD is also just big more.Because percolate will polluted surface water and underground water, and wherein contained heavy metal may enrichment in soil, causes the heavy metal contamination of soil, and the percolate that does not therefore reach emission standard is that very big harm is arranged to human and vegeto-animal growth.China is treated or without the percolate of processing up to standard, major part all directly enters rivers,lakes and seas.The aggravation of polluting along with marine red tide, water of river and lake and to the raising day by day of environmental protection requirement, the emission standard of percolate is also more and more stricter.Many areas require the percolate index must reach integrated wastewater discharge standard could to discharge, so the advanced treatment of percolate has become a problem that urgency is to be solved.At present the method that adopts usually for the treatment of refuse percolate is that it is carried out the method that materialization processing, biochemical treatment, materialization processing combine with biochemical treatment, and wherein the materialization processing has chemical oxidation, flocculation sediment, activated carbon adsorption, reverse osmosis, land law etc.; Methods such as blodisc, anaerobic oxidation processing are arranged in the biochemical treatment.But adopt aforesaid method that percolate is handled, generally all need to drop into substantial contribution, adopt complicated, large-scale equipment, so processing cost is very high, investment cost is big, and treatment process is also very complicated, even and after treatment, percolate COD concentration still about 1000mg/L, still can't reach China's integrated wastewater discharge standard.The research that modified alta-mud is used for the processing aspect of city garbage percolate is also arranged at present, but existing Bentonite Modification Technologies can not directly adopt the wilkinite raw ore to carry out modification, before being carried out modification, wilkinite must earlier wilkinite be carried out purification processes, but because the The Purification of Swelled-ground operation is very complicated, need be with a large amount of water during operation, and solid-liquid separation is also very difficult, also need to adopt complexity, large-scale equipment to operate, therefore with existing method wilkinite is carried out modification, its cost is very high, and operation is also complicated.
(3) summary of the invention:
The modified alta-mud that the present invention will disclose that a kind of production cost is low, manufacturing process is simple, less investment and can improving is removed COD and decoloring ability in the percolate; The present invention also will disclose this method for preparation of modified alta-mud.
Wilkinite be a kind of be the essential mineral composition with the montmorillonite, contain the mixture that a small amount of illite, kaolinite, illite/montmorillonite mix clay mineral such as layer and other detrital mineral composition.Montmorillonite is by two one of the tetrahedral si-o film therebetween that connects of top layer silicate minerals of forming of the aluminum oxide octahedral sheet that connects of limit altogether altogether, and its crystalline structure formula is (M
xNH
2O) (Al
2-xMg
x) [Si
4O
10] (OH)
2Monolithic layer in its structure is the very big thin slice of aspect ratio, and diameter is about 100～200nm, and thickness only is 1nm.5～10 layers of such thin slice constitute bigger irregular group by these basic granuleses, thereby wilkinite has laminate structure by the interlayer cation formation basic granules that combines.Aluminium can cause negative charge (being layer charge) surplus in the structural unit layer to the isomorphism alternate ion exchange to aluminium of silicon and magnesium in the structure, for reaching the balance of positive and negative charge, needs the positively charged ion of some amount to compensate and is positioned at interlayer region.These positively charged ions are with ion bonding force connecting structure unit layer, and are active, and its key is more much bigger than molecular linkage or hydrogen bond by force.Therefore when smectite structure unit layer internal charge does not reach balance, will come filling by a certain amount of positively charged ion in the space between unit layer, thereby (sun) ion exchange will take place.Montmorillonite since in the broken key, lattice isomorph replace and to be adsorbed on its surperficial soil ulmin disassociation etc. former thereby electronegative, thereby cause between lattice layer in conjunction with loose, meet water and easily expand into fragment, particles dispersed degree height, have huge internal surface area and a large amount of exchangeable cations, make it have good adsorption performance and ion-exchange performance, its cation exchange capacity is about 70～130mmol/100g, be widely used in industries such as foundry industry, drilling well, building, light industry, be used for iron ore pellets in a large number and be used for all trades and professions as sorbent material.
The present invention can increase substantially the ability that wilkinite is removed COD and decolouring by to alta-mud modification.Modified alta-mud is used for the treating refuse percolate, can reaches good effect.The present invention is used for the method for preparation of modified alta-mud for the treatment of refuse percolate, and step is as follows:
1) the bentonite origin breeze is broken, add water furnishing pulpous state; Generally need the bentonite origin breeze is broken into 20～200 orders, so that add water furnishing pulpous state; When adding water wilkinite being sized mixing, the solid-liquid mass ratio of wilkinite and water is generally 1: 4～15; For reaching best effect, the solid-liquid mass ratio of wilkinite and water is preferably 1: 9;
2) soluble salt is soluble in water, stir, obtain mass concentration and be 5～60% soluble salt solution; Described soluble salt is preferably magnesium salts or soluble ferric iron salt or aluminum soluble salt or soluble sodium salt or the solubility polymerization molysite or the solubility polymerization aluminium salt of solubility; For example: aluminum chloride or ferrous sulfate or polymerize aluminum chloride or sodium-chlor etc.; The mass concentration of soluble salt solution is preferably 50%;
3) the soluble salt solution of gained is added in the bentonite slurry, and make both thorough mixing, regulate pH value to 5～9 of gained mixing solutions then, and with its old certain hour of putting; And the ratio of the metallic cation in wilkinite and the soluble salt is generally 1g: 1～20mmol, is preferably 1g: 15mmol; The old time of putting of mixing solutions was generally 1～5 hour; The pH value of regulating mixing solutions is 7, and the old product that made in 5 hours of putting, performance the best;
4) mixing solutions with old postpone is heated to 60～100 ℃, makes its further reaction; The time of reacting by heating was generally 8～24 hours; 10 hours effect of reaction is best under 80 ℃ of temperature condition;
5) mixing solutions after will heating carries out drying, obtains being used for the modified alta-mud for the treatment of refuse percolate; Described dry mixed solution, exsiccant temperature are generally 100～120 ℃, and the exsiccant time is 6～20 hours; For reaching best drying effect, the exsiccant temperature is preferably 110 ℃, and the exsiccant time is preferably 12 hours.
After adopting manufacture method of the present invention that wilkinite is carried out modification, can improve its clearance greatly to COD in the percolate and colourity.Be used for the processing of percolate, the wilkinite raw ore is not removed the ability of colourity, to COD
CrClearance only be 18.9%.With modified alta-mud treating refuse percolate, find by the absorbancy of percolate before and after the test processes: the absorbancy of percolate has descended 90%, shows that it is good to chromaticity removing effect; Detect by the micro-wave digestion dichromate titration, modified alta-mud is to COD
CrClearance rise to 65.8%.Therefore this modified alta-mud extremely is suitable for the processing of percolate.The reserves of bentonite ore are big, low price, and the production technique of bentonite modified processing is fairly simple, can directly use raw ore to carry out modification, need not purify, so both avoided in modifying process using great amount of water resources as purificant, the equipment for separating liquid from solid of the usefulness that do not need to purify, also need not any other complexity, large-scale equipment, therefore its production cost is cheap, can carry out industrialized mass production fully.
(4) embodiment:
Embodiment 1:
1) bentonite in powder is broken to 20 orders, and adds water furnishing pulpous state; In the bentonite slurry of gained, the solid-liquid mass ratio of wilkinite and water is 1: 4;
2) aluminum chloride is soluble in water, stir, obtain mass concentration and be 5% liquor alumini chloridi;
3) liquor alumini chloridi is added in the bentonite slurry, the limit edged stirs, and until both thorough mixing, the pH value with the gained mixing solutions transfers to 5 then, again with its ageing 5 hours; The wilkinite of wherein selecting for use is 1g: 15mmol with aluminum ions ratio;
4) above-mentioned mixing solutions is placed 80 ℃ of reactions 10 hours;
5) then with the mixing solutions of gained 100 ℃ of dryings 12 hours, promptly get the modified alta-mud that can be used for the treating refuse percolate.
Embodiment 2:
1) bentonite in powder is broken to 100 orders, and adds water furnishing pulpous state; In the bentonite slurry of gained, the solid-liquid mass ratio of wilkinite and water is 1: 15;
2) ferrous sulfate is soluble in water, stir, obtain mass concentration and be 60% copperas solution;
3) copperas solution is added in the bentonite slurry, the limit edged stirs, and until both thorough mixing, the pH value with the mixing solutions of gained transfers to 9 then, again with its ageing 1 hour; The wilkinite of wherein selecting for use is 1g: 1mmol with the ratio of iron ion;
4) above-mentioned mixing solutions is placed 60 ℃ of reactions 8 hours;
5) then with the mixing solutions of gained 120 ℃ of dryings 6 hours, promptly get the modified alta-mud that can be used for the treating refuse percolate.
Embodiment 3:
1) bentonite in powder is broken to 200 orders, and adds water furnishing pulpous state; In the bentonite slurry of gained, the solid-liquid mass ratio of wilkinite and water is 1: 9;
2) polymerize aluminum chloride is soluble in water, stir, obtain mass concentration and be 50% polymeric aluminum chlorides solution;
3) polymeric aluminum chlorides solution is added in the bentonite slurry, the limit edged stirs, and until both thorough mixing, the pH value with the mixing solutions of gained transfers to 7 then, again with its ageing 3 hours; The wilkinite of wherein selecting for use is 1g: 20mmol with aluminum ions ratio;
4) above-mentioned mixing solutions is placed 100 ℃ of reactions 24 hours;
5) then with the mixing solutions of gained 110 ℃ of dryings 20 hours, promptly get the modified alta-mud that can be used for the treating refuse percolate.
Claims (8)
1, a kind of method for preparation of modified alta-mud that is used for the treating refuse percolate, step is as follows:
1) the bentonite origin breeze is broken, add water furnishing pulpous state;
2) soluble salt is soluble in water, stir, obtain mass concentration and be 5～60% soluble salt solution; Described soluble salt is solubility magnesium salts or soluble ferric iron salt or aluminum soluble salt or soluble sodium salt or solubility polymerization molysite or solubility polymerization aluminium salt;
3) the soluble salt solution of gained is added in the bentonite slurry, and make both thorough mixing, regulate pH value to 5～9 of gained mixing solutions then, and with its old putting;
4) mixing solutions with old postpone is heated to 60～100 ℃, makes its further reaction, and the reacting by heating time is 8～24 hours;
5) mixing solutions after will heating carries out drying, obtains being used for the modified alta-mud for the treatment of refuse percolate.
2, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 is characterized in that: described soluble salt is aluminum chloride or ferrous sulfate or polymerize aluminum chloride or sodium-chlor.
3, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 and 2 is characterized in that: in the step 1), the solid-liquid mass ratio of wilkinite and water is 1: 4～15.
4, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 and 2 is characterized in that: step 2) in, the mass concentration of soluble salt solution is 50%.
5, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 and 2, it is characterized in that: in the step 3), the ratio of the metallic cation of soluble salt is 1g: 1～20mmol in the wilkinite in the bentonite slurry and the soluble salt solution.
6, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 and 2 is characterized in that: in the step 3), after overregulating the pH value, the old time of putting of gained mixing solutions is 1～5 hour.
7, the method for preparation of modified alta-mud that is used for the treating refuse percolate according to claim 1 and 2 is characterized in that: in the step 5), the mixing solutions drying temperature after the heating is 100～120 ℃; Be 6～20 hours time of drying.
8, the modified alta-mud that is used for the treating refuse percolate of any one described method manufacturing in the claim 1～7.
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| CNB2005100213441A CN1323941C (en) | 2005-07-23 | 2005-07-23 | Modified bentonite used for treating garbage percolate and its manufacturing method |
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| CNB2005100213441A CN1323941C (en) | 2005-07-23 | 2005-07-23 | Modified bentonite used for treating garbage percolate and its manufacturing method |
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| CN1323941C true CN1323941C (en) | 2007-07-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448524C (en) * | 2007-04-03 | 2009-01-07 | 沈阳建筑大学 | Method for producing inorganic modified bentonite chromium remover |
| CN103496709B (en) * | 2013-09-30 | 2014-12-10 | 辽宁辽河油田康达实业集团有限公司 | Modified bentonite with salt and acid resistance and preparation method of modified bentonite |
| CN105129902B (en) * | 2015-09-25 | 2017-04-19 | 中国有色桂林矿产地质研究院有限公司 | Compound mineral material for disposing landfill leachate as well as preparation method and application thereof |
| CN107630437A (en) * | 2017-09-11 | 2018-01-26 | 武汉农尚环境股份有限公司 | A kind of man-made lake polycrystalline substance for improving water body self-purification ability |
| CN109985890B (en) * | 2018-12-10 | 2021-01-29 | 杭州昊悦环境科技发展有限公司 | Method for fully recovering domestic garbage and processing domestic garbage into agricultural and livestock products, medicament thereof and prepared products |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5140034B1 (en) * | 1969-10-31 | 1976-11-01 | ||
| CN1033948A (en) * | 1988-01-05 | 1989-07-19 | 周运臣 | Produce method with the calcium-base bentonite sodium bentonite |
| CN1318675A (en) * | 2001-04-03 | 2001-10-24 | 鲁安怀 | Lining material for garbage burying field |
| CN1363515A (en) * | 2002-01-28 | 2002-08-14 | 国家非金属矿深加工工程技术研究中心 | Process for preparing natural magnesium aluminium silicate gel |
-
2005
- 2005-07-23 CN CNB2005100213441A patent/CN1323941C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5140034B1 (en) * | 1969-10-31 | 1976-11-01 | ||
| CN1033948A (en) * | 1988-01-05 | 1989-07-19 | 周运臣 | Produce method with the calcium-base bentonite sodium bentonite |
| CN1318675A (en) * | 2001-04-03 | 2001-10-24 | 鲁安怀 | Lining material for garbage burying field |
| CN1363515A (en) * | 2002-01-28 | 2002-08-14 | 国家非金属矿深加工工程技术研究中心 | Process for preparing natural magnesium aluminium silicate gel |
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| CN1751992A (en) | 2006-03-29 |
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Owner name: GUILIN RESEARCH INSTITUTE OF GEOLOGY FOR MINERAL R Free format text: FORMER NAME: GUILIN MINERALS + GEOLOGIC ACADEMY |
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Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin auxiliary Star Road, No. 9 Patentee after: China Nonferrous Metal Guilin Research Institute of Geology for Mineral Resources Co., Ltd. Address before: 541004 No. 2, Star Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Minerals & Geologic Academy |