CN102153176A - Attapulgite carrier flocculation water treatment agent and production method - Google Patents
Attapulgite carrier flocculation water treatment agent and production method Download PDFInfo
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Abstract
The invention discloses an attapulgite carrier flocculation treatment agent and a production method and aims at providing a water treatment agent which is safe and nontoxic, has large alumen ustum, is rapid to settle and separate and has low operation cost and a production method. The technical scheme of the invention comprises the following points that the attapulgite carrier flocculation water treatment agent is designed by a carrier flocculation technical idea, wherein ferric salt is used as a main coagulant and attapulgite is used as a carrier. The ferric iron coagulant is processed by an oxidation synthesis process and is simultaneously activated and modified under an acidic condition, and the attapulgite and related auxiliaries are added into the activated and modified ferric iron coagulant to be compounded so as to obtain a liquid water purification agent product. The attapulgite carrier flocculation water treatment agent and the production method have the characteristics that the attapulgite carrier flocculation water treatment agent does not contain aluminum ions and has low environmental risk and meets the development direction of a water treatment medicament; due to the adoption of the carrier flocculation idea, the alumen ustum settling speed is optimized and the pH adaptability is also obviously improved; by the attapulgite carrier flocculation water treatment agent, algae is effectively removed and no algae toxins are generated; sludge is easy to process; and the attapulgite carrier flocculation water treatment agent and the production method can be widely used in the field of water supply and drainage engineering and algae removal in the water environment.
Description
Technical field
The present invention relates to a kind of plumbing medicament field, be specifically related to a kind of attapulgite carrier flocculation water conditioner and production method.
Background technology
Coagulation-settlement process is modal a kind of physico-chemical process during plumbing is handled, and is used widely in removing algae, drink water purifying and Industrial Wastewater Treatment field, can effectively remove SS, reduction COD in the waste water
Cr, decolouring, deodorizing etc.2006, China's urban family daily water consumption was per capita brought up to 155L from not enough 80L in 1980, and the Urban water supply total amount reaches 500 * 10
8T/a.With this data estimation, 5-30ppm calculates at least 25 ten thousand tons of the annual requirements of conservative estimation China water purification agent by ton water water purification agent demand.2008, China's industrial wastewater discharge total amount was 24,000,000,000 tons, calculated with 50% wastewater treatment ratio, wherein 30% adopted coagulation-settlement process, and in the consumption of the water conditioner of ton water 200ppm, year needs 720,000 tons of water conditioners.Plumbing medicament commonly used is based on aluminium salt (polymerize aluminum chloride and Tai-Ace S 150) and molysite (bodied ferric sulfate, iron trichloride and ferrous sulfate).China's aluminium salt output is approximately 300,000 tons at present, and the output of molysite and other water conditioners is about 200,000 tons, more than 20 ten thousand tons of breach are still arranged, so market outlook is boundless.Consider aluminum ions environmental risk and the deficiency aspect the high pH value trade effluent of processing, the U.S. and European Union adopted molysite as water purification agent comprehensively afterwards from 1986, and states such as Australia also forbid aluminium series water purifier processing drinking water after 2000.Therefore development of new does not have the active demand that aluminium class water conditioner becomes China plumbing medicament field.
Since the nineties in 20th century, coagulation-settlement process of new generation---the developed and application of carrier flocculation.According to the definition of U.S. EPA, thereby the carrier flocculation is by using continuous round-robin media particle and various chemical agent to strengthen the materialization treatment process that flco absorption improves suspended substance sedimentation performance in the water.Be characterized in adding insoluble media particle, utilize the adsorption of the gravity settling of medium and carrier to accelerate the growth and the precipitation of alumen ustum in the coagulation stage.Compare with traditional coagulation-settlement process, the carrier flocculation technique has advantages such as floor space is little, construction costs is low, anti impulsion load, successfully has been used for more than 100 Large Water Works in the whole world and a plurality of Industrial Wastewater Treatment engineering.At present, the carrier flocculation technique usually adopts the bigger insoluble media particle of fine sand isodensity in application, add successively with coagulating agent and coagulant aids, treat that alumen ustum is settlement separate after, by washed-out sand equipment fine sand is separated recycle once more.Such as, the Actiflo technology of Veolia adopts quartz sand, polyacrylamide and mud blend retrogradation to form sediment, and significantly improves the settling velocity of alumen ustum.Yet Actiflo technology makes equipment comparatively complicated on the one hand, be equipped with special washed-out sand device, alumen ustum fragmentation after the sand separation simultaneously, and the water ratio height also is unfavorable for the disposal of mud.Therefore, be necessary to develop a kind of integrated carrier flocculation water conditioner without carrier of separating.
Diatomite and attapulgite clay are that China's reserves abundant clay resource, especially attapulgite clay resource account for the whole world and verified 44% of attapulgite clay reserves.Diatomite is through ore dressing, removes the terra silicea purificata of purity more than 92% that obtains behind the impurity such as clay, quartz sand, detrital mineral.Diatomite contains nanometer micropore, is natural nanometer micropore material, can absorb the material doubly above own wt 3-4.All kinds of hazardous and noxious substances of diatomite in can planar water, and, water is purified very soon by the gravitational settling of diatomite, therefore in the plumbing field, be applied.Attapulgite (Attapulgite) claims polygorskite (Palygorskite) or Palygorskite again, be a kind of have enrich microtexture contain Shuifu County's magnesium silicate minerals.The crystal of attapulgite is needle-like, fibrous or fiber collection shape, the duct that has the about 200-2000nm of diameter 20nm length on the microcosmic, the feature that presents one dimension Nano structure, its duct has good stability below 400 ℃, the organic molecule of water molecules and a certain size all can directly be adsorbed in the duct, shows to have bigger specific surface area and certain absorption and ion exchange property on macroscopic view.At present, attapulgite is widely used as adsorption decolouriser, support of the catalyst and antiseptic-germicide carrier etc.Compare diatomite, attapulgite has similar microtexture and macroscopical physical properties, therefore through rational modification and composite must being applied in the plumbing field.
Chinese patent CN200410041493.X discloses a kind of Attapulgite sewage-treating agent and production method, the main points of its technical scheme are as raw material with attapulgite clay, dry after acidification, add alum and the common abrasive dust of treated starch, finished product is the Attapulgite sewage-treating agent.From its technological line, mainly have two shortcomings: at first, still adopt aluminium salt alum as coagulating agent, the feature of environmental protection of product is very poor; Next adopts treated starch as raw material, and the cost of product is higher.Chinese patent CN200310103431.2 discloses a kind of wastewater purificant and its production and application, and the characteristics of its technical scheme are that attapulgite, silica containing mineral filler and acidifying high-valency metal salt blend are made product.From its technological line, mainly have four shortcomings: 1. contain trimethylammonium hexadecyl brometo de amonio in the product, bromo element and ammonium ion all have certain environmental risk; 2. the attapulgite in the product adopts sodium technology cationization, also contains siliceous flocculating aids simultaneously, and main component is for containing aluminosilicate, ceramics powder and glass powder, so product composition and complete processing complexity, causes product cost higher; 3. high-valency metal salt adopts the mixture of aluminium salt, molysite and magnesium salts, therefore can't avoid aluminum ions environmental risk.4. from embodiment, the large usage quantity of product reaches 5000mg/L, therefore causes engineering operation cost height easily, and mud handling capacity is big.
In sum, there is defective in the water conditioner that adds attapulgite at present.China has the resources advantage of attapulgite, faces serious drinking water safety and water environment protection and maintenance problem simultaneously again, therefore removes the algae field at water supply engineering, water treatment and environment and will form widespread demand to water conditioner, and it is significant to remedy above-mentioned defective.
Summary of the invention
The objective of the invention is attapulgite physics and chemical property are applied to the plumbing field, with its carrier as the carrier flocculation process, the coagulation effect of complexed metal salt is developed a kind of attapulgite carrier flocculation water conditioner.The true density of attapulgite clay is 2.58g/cm
3, therefore can be used as the center that carrier flocculates.The zeta current potential of attapulgite in water medium with the Changing Pattern of pH value is: when pH equaled 1.8, the zeta current potential was zero, and promptly the corresponding pH value of zero potential (ZPC) is 1.8; When the pH value was higher than 1.8, the negative charge density on colloidal particle surface was greater than positive charge density, and zeta is a negative value.Along with the raising of pH value, net negative charge density increases, the also corresponding increase of the absolute value of zeta electromotive force.In water treatment procedure, general pH value scope is between 5-11, and this moment, attapulgite was electronegative, and the colloid that therefore is easy to form with the coagulating agent hydrolysis carries out charge neutrality, thereby enters the alumen ustum center.After attapulgite enters alumen ustum, make bigger being more convenient for of alumen ustum precipitate and separate on the one hand, also can utilize the absorption property of attapulgite on the other hand, further optimize the capture ability of alumen ustum pollutent.Meanwhile, the metal-salt in the attapulgite carrier flocculation water conditioner is single molysite, has avoided the environmental risk of aluminium salt.So far do not have as yet with single molysite to be metal-salt and to adopt carrier flocculation technique thinking to take the water conditioner of modification and composite attapulgite, do not have yet and such water conditioner is applied to water supply engineering, trade effluent/municipal sewage treatment and removes the research and the bibliographical information in algae field.
The technical solution adopted for the present invention to solve the technical problems is:
Utilize carrier flocculation technique thinking design attapulgite carrier flocculation water conditioner, wherein molysite is main coagulating agent, and attapulgite is a carrier.In process of production, for simplifying production technique and reducing product cost, III valency iron coagulating agent adopts the oxidation synthesis technique, simultaneously activation modification and composite adding attapulgite under acidic conditions.Whole process of production can be carried out in a reactor, no waste water, waste water and solid useless discharging, and except that sulfuric acid is hazardous substance, the production process safety and environmental protection, operability is good, and product quality is controlled easily.In application, water conditioner can rationally add according to the point of addition and the addition of technological design.Molysite in the water conditioner at first hydrolysis forms positively charged hydroxyl hydrogen colloid of iron oxide, and absorption, net are caught water pollutant; Attapulgite changes the surface zeta potential current potential owing to PH values changes, and enters alumen ustum rapidly, thereby forms the carrier effect of flocculant.
Preparing the raw materials used proportioning (weight percent) of this attapulgite carrier flocculation water conditioner is:
Attapulgite 2.0-15.0
Molysite 30.0-45.0
Sulfuric acid 1.5-5.4
Water 2.0-10.0
Oxygenant 4.0-8.0
Auxiliary agent 1.0-5.0
The production technique of attapulgite carrier flocculation water conditioner is:
1. by dry method or wet purification attapulgite, purity reaches more than 60%, with rhombspar, calcite, opal, quartz and a small amount of heavy metal of removing wherein association, and disperses the attapulgite crystal fibre.The attapulgite clay that the Xuyi Jiangsu area produces has absorption and high sticking two types.Adopt high clay to help to improve the coagulation performance of product, more help quickening the reunion and the growth of alumen ustum, be fit to water supply engineering and remove the algae field, simultaneously because product viscosity can obtain the semi-solid state product more greatly.Adopt adsorptional earth then the pollutent in the water body to be had better adsorptive power, be applicable to trade effluent and municipal sewage treatment field.
2. with 30.0-45.0 part molysite, add reactor, add sulfuric acid 1.5-5.4 part then as ferrous sulfate, iron protochloride, water 2.0-10.0 part and oxygenant 4.0-8.0 part, fully stirring reaction is oxidized to III valency iron with II valency iron, and hierarchy of control acidity.Because exothermic heat of reaction, temperature of reaction system will be elevated to rapidly about 60-80 ℃.Oxygenant can adopt one or more the mixture in potassium permanganate, sodium chlorate, hydrogen peroxide, the oxygen.
3. after oxidizing reaction is carried out 15-45 minute, add 2.0-15.0 part attapulgite of purifying to reactor through step 1.Because attapulgite is natural weakly alkaline, the III valency molysite that obtains is partially polymerized, forms basicity bodied ferric sulfate and poly-ferric chloride between 12-16%.Simultaneously, attapulgite itself also further obtains activation and modification under strong acidic condition.
4. after treating that attapulgite fully disperses, to the auxiliary agent that reactor adds 1.0-5.0 part, auxiliary agent is one or more the mixture in water glass, sodium phosphate, sodium hydrogen phosphate and the Sodium hexametaphosphate 99.Stir after 30 minutes, leave standstill and obtained the liquid attapulgite carrier flocculation of scarlet water conditioner product in 24 hours.
According to the attapulgite carrier flocculation water conditioner that aforesaid method is produced, along with the difference of proportioning raw materials, density can be at 1.2-1.65g/cm
3Between regulate, all iron content can be adjusted between 12-16%, active substance content can be between 15-19%, between the basicity 12-16%, product performance index can reach the requirement of I fluid-like state product among the GB14591-2006.What deserves to be mentioned is that attapulgite carrier flocculation water conditioner product does not contain aluminum ion, and toxic heavy metal ionic content such as arsenic, mercury, chromium, lead are all controlled, represented water conditioner development in future direction.The dosing method of attapulgite carrier flocculation water conditioner is flexible, can be widely used in water supply and sewage work and water surrounding and remove the algae field, has safety non-toxic, alumen ustum is big, settlement separate fast, carrier need not to reclaim the advantage low with working cost, especially is fit to the water purification medicament upgrading of existing water supply engineering.
The characteristics of attapulgite carrier flocculation water conditioner of the present invention:
1. do not contain aluminum ion, so environmental risk is little, meets the developing direction of water treatment agent.Product is to be the flocculation center with the natural attapulgite, and environment-protecting asepsis inorganicss such as cooperation sulfovinic acid iron polymer are the multi-kernel high-molecular inorganic water purification agent of coagulation network.
2. adopt carrier flocculation thinking to optimize the alumen ustum settling velocity.The coagulating sedimentation principle of this product be utilize polymerization iron carbonyl cation group with positive charge and the colloidal particle in the water carry out charge neutrality, make pollutent colloidal diffusion layer be compressed, and then elimination of colloid stability cohesion, and optimize settling property by the bridging action between the attapulgite.
3. remove the algae while and do not produce the algae toxin.The algae mechanism of removing of this product is to make algae sink under water by coagulating, utilizes the oxidisability of polymer iron and the adsorptivity of attapulgite clay simultaneously, suppresses the release of the active and algae toxin of algae.
4. sludge disposal is easy.Produce the part ironic hydroxide behind this product coagulating, this material is commonly used for the additive of sludge dewatering, so the dewatering of mud also improves.
The invention will be further described below in conjunction with embodiment.
Embodiment
Embodiment 1.
Get 35 parts in molysite, 3 parts in sulfuric acid, 6 parts in water, 6 parts in oxygenant (sodium chlorate), stirring reaction added 5 parts of dry method or wet purification attapulgites after 15 minutes, after the continuation stirring reaction treats that attapulgite disperses fully, add 1.5 parts of water glass, stir after 1 hour, leave standstill and obtained the liquid attapulgite carrier flocculation of scarlet water conditioner product in 24 hours.
With the lab scale application of section, the ancient Xinhe River river by the universal park, Hangzhou as the feedwater water purification project.This river river is from the West Lake, and turbidity belongs to low turbidity water in the normal temperature between 9-22NTU throughout the year, has certain typicalness in the network of rivers, China south.Profit ZR4-6 type coagulation test stirrer during coagulation experiment adopts,---coagulation of water, flocculation jar test method and Chinese engineering construction standard (CECS130:2001)---the coagulating sedimentation beaker test method that meets State Standard of the People's Republic of China (GB/T16881-1997).Beaker adopts 1.5L side's cup, adds former water and measures to 1L.Side's cup is consistent with the coagulation test method of passing through at present in the world.Compare circular beaker, square beaker turbulent flow is stronger, more meets the strong coagulation manufacturing condition of water factory.
The lab scale agitation condition is as follows:
Add medicament when 1) stirring (600r/min) stirring 10s fast,
2) 600r/min stirs 30s,
3) 300r/min stirs 20s,
4) 150r/min stirs 1min,
5) 80r/min stirs 4min,
6) 4.30r/min stirs 2min,
7) precipitation was got apart from water surface 2cm place water sampling and is tested in 20 minutes.
Adding dose is: 5,10,15,20 and 25ppm, select commodity iron trichloride (FeCl simultaneously
3) and polymerize aluminum chloride (PAFC, 30%) water purification agent and the present invention as performance comparison.
The little test result of water purification is as follows:
1. in handling normal temperature in the process of low turbidity water, under the situation of addition less than 10ppm, PAFC is with respect to the present invention and external FeCl commonly used
3Demonstrate certain advantage, the turbidity of precipitation supernatant liquor can reach the production water quality requirement that enters filtering basin, and promptly turbidity is less than 2NTU.When addition is increased to 15ppm when above, three's performance difference is not obvious, can both reach the filtration production requirement of 2NTU.Analyze from the principle of visible light turbidimeter, can think that in fact three's performance difference is little.As previously mentioned, aluminium alumen ustum settling velocity is slow, and addition has a lot of macroscopic flcos, as uses laser particle analyzer during less than 10ppm in the supernatant liquor of PAFC, more can find the particle between 0.7-100um of a large amount of naked eyes and visible light reflection.And the turbidity of the present invention and FeCl3 and its numbers of particles have consistence, and the size distribution of the alumen ustum that hydrolysis just forms has bigger influence to the result of visible light turbidity test.
2. the present invention and FeCl
3All be main component, therefore have comparability with the molysite.From the little test result of water purification, performance of the present invention has surmounted FeCl commonly used abroad
3, therefore have vast market prospect and promotional value.At present, alkaline water supply process commonly used abroad utilizes lime to regulate after the water inlet pH, adds FeCl
3Carry out coagulating sedimentation, promote the effect of coagulating sedimentation so on the one hand, pH is about 8 in water outlet simultaneously, also can alleviate the corrosion to pipe network.If this explained hereafter water of domestic employing, then the present invention has the ability to capture feedwater water purification market, especially Urban water supply and rural safe drinking water field fully.
Embodiment 2.
Get 45 parts in molysite, 4.5 parts in sulfuric acid, 5 parts in water, 7 parts in oxygenant (sodium chlorate and hydrogen peroxide 1: 1), stirring reaction added 5 parts of dry method or wet purification attapulgites after 15 minutes, after the continuation stirring reaction treats that attapulgite disperses fully, add 3 parts of water glass, stir after 1 hour, leave standstill and obtained the liquid attapulgite carrier flocculation of scarlet water conditioner product in 24 hours.
With the lab scale application of Huzhou printing and dyeing company limited oxidation pond waste water as the Industrial Wastewater Treatment engineering.This waste water COD is about 2000mg/L, and pH value 6-9, belongs to typical dyeing waste water by water temperature 15-35 ℃.Profit ZR4-6 type coagulation test stirrer during coagulation experiment adopts,---coagulation of water, flocculation jar test method and Chinese engineering construction standard (CECS130:2001)---the coagulating sedimentation beaker test method that meets State Standard of the People's Republic of China (GB/T16881-1997).Correlated medicament is PAFC, and agitation condition is with embodiment 1.Additive amount of medicament is 1000ppm, and the contrast sample is the liquid polymerization aluminum chloride medicament that this factory uses at present.
The little test result of the coagulating sedimentation of dyeing waste water is as follows:
1. additive amount of medicament is under the condition of 1000ppm, adopts the existing liquid polymerization aluminum chloride medicament of the present invention and producer, and waste water COD drops to 728 and 928mg/L respectively, and the COD clearance is 66% and 57%.Illustrate that effect of the present invention is better than Zhe Beidiqu polymerize aluminum chloride medicament commonly used.
2. consider from sludge quantity.Through 4 hours sludge settlings with after compressing, recording mud thickness of the present invention is 0.6cm, and the mud thickness of the existing liquid polymerization aluminum chloride medicament of producer is 1.8cm, illustrate that sludge quantity of the present invention is less, and the mud compressibility is better.
Embodiment 3.
Get 40 parts in molysite, 5 parts in sulfuric acid, 5 parts in water, 6 parts in oxygenant (sodium chlorate and hydrogen peroxide 1: 1), stirring reaction is after 20 minutes, add 10 parts of dry method or wet purification attapulgites, after the continuation stirring reaction treats that attapulgite disperses fully, add 1 part of water glass, 0.5 part of sodium phosphate, stir after 1 hour, leave standstill and obtained the liquid attapulgite carrier flocculation of scarlet water conditioner product in 24 hours.
Remove the lab scale object of algae performance as the present invention with Jiulongjiang River basin, Fujian Province section river.Water sample pH value 8-9, algae content about 5.0 * 10
7Individual, turbidity 45NTU.According to " coagulation of water, flocculation jar test method " (GB/T16881-97) and " coagulating sedimentation beaker test method " (CECS130:2001), the algae usefulness of removing of the present invention is carried out preliminary assessment.Be limited to field condition, amount of algae is estimated in sediments microscope inspection artificial counting mode, and the turbidity of hydrous water is assessed.Correlated medicament is PAFC, and agitation condition is with embodiment 1.Additive amount of medicament is 20,30 and 40ppm.
Remove the algae result of experiment and show, under the condition of each additive amount of medicament, the algae effect of removing of the present invention is all significantly better than PAFC, and major cause is that the pH value of algae-containing water is higher, has surpassed the coagulating sedimentation pH value scope of aluminium salt the best.From the quantity of algae, when addition was between 30-40ppm, the algae content in the supernatant liquor was less than 1.52-9.12 * 10
6The limit value of individual/L.Also can obviously observe in the mud of coagulating sedimentation by microscope, have a large amount of alga cells, illustrate that alumen ustum of the present invention has good capture effect to algae.
In the algae removal technology of present main flow, the coagulating method has the potential technology economy advantage comparatively speaking.Employing at present is that two kinds of technology of core are removed algae with the coagulating.A kind of is coagulating sedimentation, and promptly adding in water body with the natural attapulgite clay is the coagulating agent of carrier, utilizes the net of the coagulating agent function of catching and build bridge, and the supplementary set algae also is deposited to water bottom.Another is a coagulation air-float, on the basis of coagulating, cooperate slag scraper and aerator, from water with the algae enrichment, utilize to move and remove the algae platform, algae is transferred to land, to realize the renewable resources of algae, as as farmland fertilizer etc., even can extract effective nutritive substance (protein, carotene etc.) in the algae.Remove algae if will realize the coagulating method of great water body, algicide is the core technology problem that must solve safely and efficiently.Coagulating class algicide at first must have outstanding coagulation and remove the algae ability, does not need to construct in advance heavy constructions such as enclosure, only needs an enough big chemicals dosing plant to put aboard ship, can big area move except that algae.Secondly, coagulating class algicide also must be safe and reliable, no environment risk, so Application Areas of the present invention is more wide, can be used for the algae that removes of tap water protective belt.
Claims (5)
1. attapulgite carrier flocculation water conditioner and production method is characterized in that molysite is main coagulating agent, and attapulgite is a carrier.The water conditioner prescription adopts the carrier flocculation technique to optimize the alumen ustum settling velocity and does not contain aluminum ion, can be widely used in water supply and sewage work and water surrounding and remove the algae field.
2. attapulgite carrier flocculation water conditioner as claimed in claim 1 is characterized in that raw materials used proportioning (weight percent) is:
Attapulgite 2.0-15.0
Molysite 30.0-45.0
Sulfuric acid 1.5-5.4
Water 2.0-10.0
Oxygenant 4.0-8.0
Auxiliary agent 1.0-5.0
Its production technique is: at first, by dry method or wet purification attapulgite, purity reaches more than 60%, with rhombspar, calcite, opal, quartz and a small amount of heavy metal of removing wherein association, and disperses the attapulgite crystal fibre.Then, 30.0-45.0 part molysite is added reactor, add sulfuric acid 1.5-5.4 part then, water 2.0-10.0 part and oxygenant 4.0-8.0 part, fully stirring reaction is oxidized to III valency iron with II valency iron, and hierarchy of control acidity.Because exothermic heat of reaction, temperature of reaction system will be elevated to rapidly about 60-80 ℃.Then, after oxidizing reaction is carried out 15-45 minute, add 2.0-15.0 part attapulgite of purifying to reactor through step 1.At last, treat that attapulgite fully disperses after, the auxiliary agent that adds 1.0-5.0 part to reactor.Stir after 30 minutes, leave standstill and obtained the liquid attapulgite carrier flocculation of scarlet water conditioner product in 24 hours.
3. attapulgite carrier as claimed in claim 1 flocculation water conditioner is characterized in that molysite adopts a kind of in ferrous sulfate or the iron protochloride.
4. attapulgite carrier as claimed in claim 1 flocculation water conditioner is characterized in that oxygenant adopts one or more the mixture in potassium permanganate, sodium chlorate, hydrogen peroxide, the oxygen.
5. attapulgite carrier as claimed in claim 1 flocculation water conditioner is characterized in that auxiliary agent is one or more the mixture in water glass, sodium phosphate, sodium hydrogen phosphate and the Sodium hexametaphosphate 99.
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| CN102718281A (en) * | 2012-07-10 | 2012-10-10 | 哈尔滨工业大学 | Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent |
| CN103304016A (en) * | 2013-06-28 | 2013-09-18 | 常州大学 | Method for preparing hybrid flocculant by use of attapulgite |
| CN103663655A (en) * | 2013-12-17 | 2014-03-26 | 中国林业科学研究院林产化学工业研究所 | Water purifying agent for advanced treatment of pulping, papermaking, printing and dyeing wastewater as well as preparation method of water purifying agent |
| CN103896377A (en) * | 2013-10-29 | 2014-07-02 | 东南大学 | Raw material for preparing town sewage treating agent and preparation method thereof |
| CN104310550A (en) * | 2014-10-29 | 2015-01-28 | 山东华亚环保科技有限公司 | Wastewater treatment flocculant |
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| CN102718281A (en) * | 2012-07-10 | 2012-10-10 | 哈尔滨工业大学 | Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent |
| CN102718281B (en) * | 2012-07-10 | 2013-07-24 | 哈尔滨工业大学 | Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent |
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| CN103896464B (en) * | 2014-04-25 | 2016-02-10 | 南京护航环保科技有限公司 | A kind of trade effluent materializing strategy agent and application thereof |
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| CN105347451A (en) * | 2015-12-16 | 2016-02-24 | 无锡吉进环保科技有限公司 | Preparation method of inorganic nano-flocculant adopting attapulgite loaded with metal ions |
| CN105439269A (en) * | 2015-12-16 | 2016-03-30 | 无锡吉进环保科技有限公司 | Inorganic nano flocculating agent namely metal ions loaded attapulgite |
| CN105347451B (en) * | 2015-12-16 | 2018-10-09 | 北京中设水处理有限公司 | A kind of inorganic nano flocculant preparation method of attapulgite loaded metal ion |
| CN106698538A (en) * | 2016-11-25 | 2017-05-24 | 南宁市黑晶信息技术有限公司 | Sewage treatment agent and preparation method thereof |
| CN107434285A (en) * | 2017-08-23 | 2017-12-05 | 华南理工大学 | A kind of preparation method for being used to slow down the modified polyaluminium chloride of secondary fiber papermaking waste water hyperfiltration treatment fouling membrane |
| CN110261265A (en) * | 2019-06-25 | 2019-09-20 | 成都建工赛利混凝土有限公司 | Flocculant detection method and its detection device in a kind of sand |
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Application publication date: 20110817 |