CN102295360A - Method for simultaneously removing arsenic and fluorine in ground water - Google Patents
Method for simultaneously removing arsenic and fluorine in ground water Download PDFInfo
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- CN102295360A CN102295360A CN2010102102410A CN201010210241A CN102295360A CN 102295360 A CN102295360 A CN 102295360A CN 2010102102410 A CN2010102102410 A CN 2010102102410A CN 201010210241 A CN201010210241 A CN 201010210241A CN 102295360 A CN102295360 A CN 102295360A
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Abstract
The invention belongs to the technical field of removal of arsenic and fluorine in arsenic-and-fluorine-coexisting polluted ground water, in particular relates to an application method for adsorption of arsenic and fluorine with hydrated iron-aluminum hydroxide and particularly relates to application in removing arsenic and fluorine in drinking water at rural areas. The invention provides a method for converting dissolved arsenic and fluorine into particle arsenic and fluorine and removing particle arsenic and fluorine from water by utilizing hydrated iron-aluminum hydroxide and also provides an integrated reactor for achieving the processes. The method provided by the invention can be used for removing arsenic and fluorine in drinking water, ground water and industrial wastewater; and in addition, the method can also be used for removing heavy metals such as mercury, lead, zinc, copper, cadmium and the like in water.
Description
Technical field
The present invention relates to the treatment process of arsenic from underwater fluorine, be meant especially, a kind of treatment process of removing removing arsenic and fluoride simultaneously.
Background technology
Tap water arsenic fluoride pollution and water quality health risk thereof have caused domestic and international extensive concern.The high arsenic water of long-term drinking can make human body produce a series of health problems such as melanosis, seborrheic keratosis and cancer, and the long-term drinking water of high fluorine content then can cause spot tooth disease and osteofluorosis.China typically suffers one of country of arsenic, fluoride pollution simultaneously.Pollute feature because Environmental Geochemical Factors, many regional underground water meters reveal tangible arsenic fluorine coexistence, and may cause certain areas endemy sickness rate to raise unusually owing to the collaborative toxic effect of potential between the two.China's existing " drinking water sanitary standard " (GB5749-2006) in the standard limited value of regulation arsenic and fluorine be respectively 0.01mg/L and 1mg/L.
Arsenic mainly exists with arsenate (As (V)) and two kinds of forms of arsenite (As (III)) in the natural water body.Under the reductibility groundwater condition, arsenic (III) is main existence form.With arsenic (V) comparatively speaking, arsenic (III) toxicity is stronger, and is relatively poor to the avidity of soil, settling and metal oxide etc., it is bigger to remove difficulty.Fluorine is mainly with fluorion (F in the natural water
-) form exist.Arsenic removal, technology of Fluoride Removal have been carried out comparatively deep research both at home and abroad.Theoretically, the method that can remove arsenic has coagulation, sedimentation (cosedimentation), absorption, ion-exchange, membrane sepn etc.; The method that can remove fluorine has coagulation, absorption, ion-exchange, membrane sepn etc.Therefore, coagulation, absorption, ion-exchange, membrane sepn etc. can realize that all the arsenic fluorine removes simultaneously in theory.But up to now, still lack the technology that can remove removing arsenic and fluoride simultaneously that in engineering, to apply both at home and abroad.
In fact, coagulation arsenic removal technology of Fluoride Removal often is suitable for extensive water factory, and underground water arsenic fluoride pollution often is present in the Rural areas, and coagulation technology is difficult to use under analogue.Adsorption technology is the best-of-breed technology that is suitable for the rural dispersed waterworks, but the sorbent material of active adsorption arsenic fluorine rarely has report simultaneously.Ion exchange technique can be removed removing arsenic and fluoride in competition under the exchange interaction, but be subjected to vitriol, muriate isoionic influence very big.Can remove removing arsenic and fluoride as if the employing reverse osmosis technology in the membrane separation technique, but have problems such as processing cost height, a large amount of dense water of generation.Therefore, based on the absorbing process that is easy to use in the rural area, exploitation is the sorbent material and the application method thereof of arsenic-adsorbing fluorine simultaneously, and this may be the feasible way that solves tap water arsenic fluorine coexistence pollution problem.
But ferriferous oxide is the arsenic removal active ingredient of active adsorption arsenic, but aluminum oxide is the defluorination active ingredient of active adsorption fluorine.Therefore, the two is carried out composite, promptly might obtain to go simultaneously the material of removing arsenic and fluoride.For example, people such as Cai Yaqi have invented ferric oxide-alumina compound nanophase defluoridation material with very strong defluorination ability (number of patent application: CN200710118307.1), this material have also shown good adsorption to arsenic and removed ability.But, this material preparation process complexity, the cost costliness, and often need externally-applied magnetic field could realize solid-liquid separation preferably, thus be difficult in engineering reality, use.(number of patent application: material preparation cost CN200510040604.X) is lower for the attapulgite defluorination agent of invention such as Xu Qinghua, but arsenic removal defluorination ability a little less than, sorbent material throwing amount is higher, and need unit such as complicated flocculation, precipitation, clarification filtration to realize solid-liquid separation, be unfavorable in the distributing defluorination engineering of rural area, using.
The present invention is directed to the problems referred to above, propose a kind of with low cost, easy to use, the novel method that can remove removing arsenic and fluoride simultaneously.The present invention not only can remove pollutents such as arsenic, fluorine in underground water, tap water or the trade effluent, also can remove heavy metals such as mercury, lead, zinc, copper, cadmium.
Summary of the invention
The present invention is directed to arsenic fluorine coexistence polluted water, a kind of economical and effective, treatment process easy to use are provided.For achieving the above object, the present invention proposes a kind ofly at first solvability arsenic fluorine in the water to be converted into particulate form arsenic fluorine, afterwards the method for particulate form arsenic fluorine being removed from water by the solid-liquid separation process.Particularly, the present invention takes following technical scheme:
(1) under well-beaten condition, any hydrated iron aluminium hydroxide that is generated through chemical reaction by molysite, aluminium salt and alkali lye that adds in arsenic fluorine coexistence polluted water in such a way changes into particulate form arsenic fluorine by effects such as absorption, sedimentation, cosedimentation, surface complexations with arsenic, the fluorine contaminant of solubilised state in the water.
1) mixed solution with molysite and aluminium salt is fully adding in the alkali lye under the agitation condition, and continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
2) alkali lye is fully being added in the mixed solution of molysite and aluminium salt under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
3) iron salt solutions is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; Again aluminum salt solution is fully being added in the mixed solution of molysite and alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
4) aluminum salt solution is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; Again iron salt solutions is fully being added in the mixed solution of aluminium salt and alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
5) alkali lye is fully being added in the iron salt solutions under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; Mixed solution with alkali lye and molysite adds in the aluminum salt solution again, continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
6) alkali lye is fully being added in the aluminum salt solution under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; Mixed solution with alkali lye and aluminium salt adds in the iron salt solutions again, continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
7) mixed solution with molysite and aluminium salt is fully adding in the arsenic fluorine coexistence polluted water under the agitation condition, behind reaction 0.5～5min, is fully adding alkali lye and is continuing reaction 5～120min under the agitation condition.
8) alkali lye is fully being added in the arsenic fluorine coexistence polluted water under the agitation condition, behind reaction 0.5～5min, fully adding the mixed solution of molysite and aluminium salt and continuing reaction 5～120min under the agitation condition.
9) mixed solution, the alkali lye with molysite and aluminium salt is fully adding simultaneously in the arsenic fluorine coexistence polluted water under the agitation condition, and continuing reaction 5～120min under agitation condition.
Wherein, the ratio of the mole number of molysite and the mole number of aluminium salt is 0.5: 1～1: 10 in the hydrated iron aluminium hydroxide; In the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 15: 1～200: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 5: 1～25: 1.
Described molysite can be selected from a kind of in iron(ic) chloride, ferric sulfate, iron nitrate, poly-ferric chloride, bodied ferric sulfate, the polymerization iron nitrate etc. or greater than more than one mixing salt.
Described aluminum salt solution is selected from a kind of in the solution such as Tai-Ace S 150, aluminum chloride, polyaluminium sulfate, polymerize aluminum chloride, aluminum nitrate, polymerization aluminum nitrate, alum or greater than more than one mixture.
Described alkali lye is a kind of in sodium hydroxide, potassium hydroxide, calcium hydroxide, water glass, ammoniacal liquor, yellow soda ash, the salt of wormwood or greater than more than one mixture.Hydroxide ion (OH in the alkali lye
-) mole number and the hydrated iron aluminium hydroxide in the ratio of mole number sum of the mole number of iron and aluminium be between 0.05: 1～5: 1.
(2) reacted water solid-liquid separation in any realization (1) in such a way, particulate form arsenic fluorine is removed, and the arsenic fluorine in the arsenic fluorine coexistence polluted water is purified.
1) staticly settle, sedimentation time is 10min～24h;
2) sand media filtration;
3) membrane filtration;
4) staticly settle 10min～4h after, supernatant liquor is carried out the sand media filtration;
5) staticly settle 10min～4h after, supernatant liquor is carried out membrane filtration;
6) staticly settle 10min～4h after, supernatant liquor is carried out the sand media filtration, filter water outlet and carry out membrane filtration;
7) carry out membrane filtration after the sand media filtration.
Described staticly settling refers to, and reacted water in (1) is left standstill, and particulate matter precipitates the process of being removed under action of gravity.
Described sand media filtration refers to, with current via in the filtrates such as quartz sand, hard coal, magnetite one or more according to any than packing layers of forming, thereby the process that particulate matter is removed under the filtrate crown_interception.The water that carries out the sand media filtration can be the supernatant liquor of reacted water after staticly settling in reacted water or (1) in (1).
Described membrane filtration refers to current any in microfiltration membrane, ultra-filtration membrane or nanofiltration membrane, makes particulate matter be held back the process of removal.The water that carries out membrane filtration can be reacted water in (1), or
(1) supernatant liquor of reacted water after staticly settling in, or the supernatant liquor of reacted water after the staticly settling water behind the sand media filtration again in (1), or the water of reacted water behind the sand media filtration in (1).
(3) the present invention also provides the integrated reactor that can realize said process continuously.Integrated reactor comprises mixing reactor, adsorptive reactor, unit such as precipitation reactor, sand medium filter, film filter.Wherein, the purpose of mixing reactor is to realize that the arsenic fluorine in hydrated iron aluminium hydroxide and the arsenic fluorine coexistence polluted water fully contacts; The purpose of adsorptive reactor is to realize that the solubilised state arsenic fluorine in the arsenic fluorine coexistence polluted water is converted into particulate form arsenic fluorine; The purpose of precipitation reactor, sand media filtration, film filter etc. is the removal of particulate form arsenic fluorine from water.
In the mixing reactor, according to as (1) described method the hydrated iron aluminium hydroxide is added to arsenic fluorine coexistence polluted water, and realize that the arsenic fluorine fully contacts in hydrated iron aluminium hydroxide and the water.The mixing reactor residence time is 0.5～2min.
The adsorptive reactor hydraulic detention time is 5～120min.
The precipitation reactor hydraulic detention time is 10min～24h.
In the sand medium filter, the particle diameter of filter medium scope is 0.5mm～2.0mm, and thickness is 0.8m～1.5m; The filtration filtering velocity is 0.5m/h～10m/h.
Film filter can be any or its array mode in micro-filtration, ultrafiltration, the nanofiltration; If during combination, micro-filtration should be before ultrafiltration and nanofiltration, ultrafiltration should be before nanofiltration.
The technique effect that the present invention realizes is as follows:
1, depollution usefulness excellence, only need not the miscellaneous equipment investment and just can remove other pollutents such as arsenic, fluorine, turbidity, particulate matter and heavy metal simultaneously, make the treating water index of correlation reach " national drinking water standard " (GB 5749-2006) by this Processing Equipment; Particularly, arsenic concentration is lower than 0.01mg/L, and fluorine concentration is lower than 1.0mg/L.
2, technology is simple, and is easy and simple to handle, the Continuous Flow operation, and running cost is cheap, and equipment can semi-automaticly move, and does not need complicated regenerative process and support equipment thereof, and the comprehensive treating process cost is between 0.2 yuan/ton～1.5 yuan/ton.
3, equipment can be according to source water arsenic fluorine concentration, form and ratio, and parameters such as the pending water yield design neatly to satisfy the water requirement of different areas, have the adaptability of wide spectrum.
Embodiment
Embodiment 1
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.1mg/L arsenic, the 2.0mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 0.5: 1 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 100: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 5: 1.
The preparation sodium hydroxide solution, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 0.05: 1.
The mixed solution of molysite and aluminium salt is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5min.
The hydrated iron aluminium hydroxide that reaction is generated adds in the arsenic fluorine coexistence polluted water under abundant agitation condition and reacts 120min.Stop to stir, leave standstill 120min, take out supernatant liquor.Arsenic concentration is 0.009mg/L in the supernatant liquor, and fluorine concentration is 0.8mg/L.
Embodiment 2
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.1mg/L arsenic, the 2.0mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 1: 10 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 200: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 25: 1.
Preparation sodium hydroxide and water glass mixing solutions, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 5: 1.
The mixed solution of molysite and aluminium salt is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5min.
The hydrated iron aluminium hydroxide that reaction is generated adds in the arsenic fluorine coexistence polluted water under abundant agitation condition and reacts 5min.Stop to stir, leave standstill 120min; With the supernatant liquor filtrate of flowing through is the medium filter of quartz sand, and the particle diameter of filter medium scope is 1.0mm～2.0mm, and thickness is 0.8m, and the filtration filtering velocity is 0.5m/h.Strainer water outlet arsenic concentration is 0.002mg/L, and fluorine concentration is 0.6mg/L.
Embodiment 3
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.2mg/L arsenic, the 1.5mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 1: 1 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 20: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 10: 1.
Preparation sodium hydroxide and calcium hydroxide mixing solutions, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 1: 1.
Molysite is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5min; Afterwards aluminium salt is fully being added in the mixed solution of alkali lye and molysite under the agitation condition, and under mixing condition, continuing reaction 1min.
The hydrated iron aluminium hydroxide that reaction is generated adds in the arsenic fluorine coexistence polluted water under abundant agitation condition and reacts 120min.Be anthracitic medium filter with current through filtrate after stopping to stir, the particle diameter of filter medium scope is 1.5mm～2.0mm, and thickness is 1.0m, and the filtration filtering velocity is 5m/h.Strainer water outlet arsenic concentration is 0.008mg/L, and fluorine concentration is 0.9mg/L.
Embodiment 4
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.2mg/L arsenic, the 3mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 1: 1 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 20: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 10: 1.
Preparation sodium hydroxide and ammoniacal liquor mixing solutions, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 1: 1.
Molysite is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5min; Afterwards aluminium salt is fully being added in the mixed solution of alkali lye and molysite under the agitation condition, and under mixing condition, continuing reaction 1min.
The hydrated iron aluminium hydroxide that reaction is generated adds in the arsenic fluorine coexistence polluted water under abundant agitation condition and reacts 120min.Be anthracitic medium filter with current through filtrate after stopping to stir, the particle diameter of filter medium scope is 1.5mm～2.0mm, and thickness is 1.0m, and the filtration filtering velocity is 5m/h.Strainer water outlet arsenic concentration is 0.008mg/L, and fluorine concentration is 0.9mg/L.
Embodiment 5
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.2mg/L arsenic, the 3mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 1: 3 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 100: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 6: 1.
Preparation sodium hydroxide and potassium hydroxide mixing solutions, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 3: 1.
The mixed solution of molysite and aluminium salt is pumped in the mixing reactor that contains arsenic fluorine coexistence polluted water, behind reaction 0.5min under the abundant agitation condition, pump into alkali lye again and continue and fully reacting 1min under the agitation condition, under abundant agitation condition, reacting 120min afterwards.Reacted water enters the microfiltration membrane reactor and removes particulate matter in the water, and microfiltration membrane reactor water outlet arsenic concentration is 0.006mg/L, and fluorine concentration is 0.8mg/L.
Embodiment 6
In the present embodiment, arsenic fluorine coexistence polluted water contains 0.2mg/L arsenic, the 3mg/L fluorine.
The mixed solution of preparation molysite and aluminium salt, wherein molysite is an iron(ic) chloride, and aluminium salt is Tai-Ace S 150, and the mole number of molysite is 1: 3 with the ratio of the mole number of aluminium salt.In the mixed solution in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 100: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 6: 1.
Preparation sodium hydroxide and sodium carbonate mixture, hydroxide ion (OH in the alkali lye
-) mole number and hydrated iron aluminium hydroxide in the ratio of mole number and the mole number sum of aluminium of iron be 3: 1.
The mixed solution of molysite is pumped in the mixing reactor that contains arsenic fluorine coexistence polluted water, behind reaction 0.5min under the abundant agitation condition, pump into alkali lye again and continue and fully reacting 1min under the agitation condition, pump into aluminium salt again and continue and fully reacting 1min under the agitation condition; Fully reacting 60min under the agitation condition afterwards.Reacted water is through precipitation reactor, and the precipitation unit residence time is 120min.The precipitation reactor supernatant liquor filters through ultrafiltration membrane reactor after entering the medium filter filtration again, and ultrafiltration membrane reactor water outlet arsenic concentration is 0.005mg/L, and fluorine concentration is 0.5mg/L.
Claims (7)
1. method of removing arsenic fluorine in the water simultaneously, it is characterized in that, at first utilize the hydrated iron aluminium hydroxide that solvability arsenic fluorine in the water is converted into particulate form arsenic fluorine by effects such as absorption, sedimentation, cosedimentation, surface complexations, by the solid-liquid separation process particulate form arsenic fluorine is removed from water afterwards.
2. hydrated iron aluminium hydroxide according to claim 1 is characterized in that, the hydrated iron aluminium hydroxide is prepared from through chemical reaction by molysite, aluminium salt, alkali lye.
3. according to claim 1 and 2 described hydrated iron aluminium hydroxides, it is characterized in that described molysite can be selected from a kind of in iron(ic) chloride, ferric sulfate, iron nitrate, poly-ferric chloride, bodied ferric sulfate, the polymerization iron nitrate etc. or greater than more than one mixing salt.Described aluminum salt solution is selected from a kind of in the solution such as Tai-Ace S 150, aluminum chloride, polyaluminium sulfate, polymerize aluminum chloride, aluminum nitrate, polymerization aluminum nitrate, alum or greater than more than one mixture.The mole number of molysite is 0.5: 1～1: 10 with the ratio of the mole number of aluminium salt.
Described alkali lye is a kind of in sodium hydroxide, potassium hydroxide, calcium hydroxide, water glass, ammoniacal liquor, yellow soda ash, the salt of wormwood or greater than more than one mixture.Hydroxide ion (OH in the alkali lye
-) mole number and the hydrated iron aluminium hydroxide in the ratio of mole number sum of the mole number of iron and aluminium be between 0.05: 1～5: 1.
4. according to each described hydrated iron aluminium hydroxide of claim 1～4, it is characterized in that, can add to arsenic fluorine coexistence polluted water according to one of following any way:
1) mixed solution with molysite and aluminium salt is fully adding in the alkali lye under the agitation condition, and continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
2) alkali lye is fully being added in the mixed solution of molysite and aluminium salt under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
3) iron salt solutions is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; Again aluminum salt solution is fully being added in the mixed solution of molysite and alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
4) aluminum salt solution is fully being added in the alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; Again iron salt solutions is fully being added in the mixed solution of aluminium salt and alkali lye under the agitation condition, and under mixing condition, continuing reaction 0.5～10min; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
5) alkali lye is fully being added in the iron salt solutions under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; Mixed solution with alkali lye and molysite adds in the aluminum salt solution again, continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
6) alkali lye is fully being added in the aluminum salt solution under the agitation condition, and under agitation condition, continuing reaction 0.5～10min; Mixed solution with alkali lye and aluminium salt adds in the iron salt solutions again, continues reaction 0.5～10min under mixing condition; To react the hydrated iron aluminium hydroxide (together with liquid) that generates afterwards and fully add in the arsenic fluorine coexistence polluted water reaction 5～120min under the agitation condition.
7) mixed solution with molysite and aluminium salt is fully adding in the arsenic fluorine coexistence polluted water under the agitation condition, behind reaction 0.5～5min, is fully adding alkali lye and is continuing reaction 5～120min under the agitation condition.
8) alkali lye is fully being added in the arsenic fluorine coexistence polluted water under the agitation condition, behind reaction 0.5～5min, fully adding the mixed solution of molysite and aluminium salt and continuing reaction 5～120min under the agitation condition.
9) mixed solution, the alkali lye with molysite and aluminium salt is fully adding simultaneously in the arsenic fluorine coexistence polluted water under the agitation condition, and continuing reaction 5～120min under agitation condition.
5. application method according to each described hydrated iron aluminium hydroxide of claim 1～4, it is characterized in that, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of arsenic element be 15: 1～200: 1, in the hydrated iron aluminium hydroxide in the mole number of aluminium salt and the arsenic fluorine coexistence polluted water ratio of the mole number of fluorion be 5: 1～25: 1.
6. one kind according to each described particulate form arsenic fluorine removal method of claim 1～6, it is characterized in that, when solubilised state arsenic fluorine in the water is adsorbed on after the hydrated iron aluminium hydroxide is converted into particulate form arsenic fluorine, adopts one of following method to remove particulate form arsenic fluorine in the water:
1) staticly settle, sedimentation time is 10min～24h;
2) sand media filtration;
3) membrane filtration;
4) staticly settle 10min～4h after, supernatant liquor is carried out the sand media filtration;
5) staticly settle 10min～4h after, supernatant liquor is carried out membrane filtration;
6) staticly settle 10min～4h after, supernatant liquor is carried out the sand media filtration, filter water outlet and carry out membrane filtration;
7) carry out membrane filtration after the sand media filtration.
7. an integrated reactor that goes simultaneously the removing arsenic and fluoride method according to claim 1 is characterized in that integrated reactor comprises mixing reactor, adsorptive reactor, unit such as precipitation reactor, sand medium filter, film filter.Wherein, the mixing reactor residence time is 0.5～2min; The adsorptive reactor hydraulic detention time is 5～120min; The precipitation reactor hydraulic detention time is 10min～24h; In the sand medium filter, the particle diameter of filter medium scope is 0.5mm～2.0mm, and thickness is 0.8m～1.5m; Water is 0.5m/h～10m/h through the filtration filtering velocity scope of sand medium filter; Film filter can be any or its array mode in micro-filtration, ultrafiltration, the nanofiltration; If during combination, micro-filtration should be before ultrafiltration and nanofiltration, ultrafiltration should be before nanofiltration.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253788A (en) * | 2012-12-28 | 2013-08-21 | 中国科学院生态环境研究中心 | Method for removing fluorides in water through aluminum base composite metal oxide-based fluorine removing absorption material complexation-absorption |
| CN104326592A (en) * | 2014-10-09 | 2015-02-04 | 常州大学 | Method for restoration of heavy metal mercury in groundwater |
| CN105980044A (en) * | 2014-01-22 | 2016-09-28 | 荷兰联合利华有限公司 | A method of modifying surface characteristics of alumina |
| CN106000330A (en) * | 2016-07-06 | 2016-10-12 | 中国科学院生态环境研究中心 | Hollow cubic iron-aluminum composite oxyhydroxide defluorination adsorbent based on electrospining immobilization |
| CN106179231A (en) * | 2016-07-06 | 2016-12-07 | 中国科学院生态环境研究中心 | A kind of hollow cube ferrum aluminum is combined preparation and the application process of oxyhydroxide de-fluoridation adsorbent |
| CN109694114A (en) * | 2019-02-01 | 2019-04-30 | 中南大学 | Application of the aluminium for ferrihydrite in absorption heavy metal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249417A (en) * | 2008-03-28 | 2008-08-27 | 合肥工业大学 | Concave-convex bar stone clay-trihydrate alumina/iron nano composite adsorbing agent, preparation and applications |
| CN101423278A (en) * | 2008-11-24 | 2009-05-06 | 中国科学院生态环境研究中心 | Multiple element composite metal oxidate arsenic removal settling agent and use method thereof |
| CN101507911A (en) * | 2008-11-11 | 2009-08-19 | 中国科学院生态环境研究中心 | Defluorination absorbing material based on aluminum base composite oxides and its preparation method and use and special device of the preparation method |
| CN101601989A (en) * | 2009-06-29 | 2009-12-16 | 云南大学 | The method of a kind of liquid absorbent and improvement water body in lake arsenic contamination |
-
2010
- 2010-06-23 CN CN2010102102410A patent/CN102295360A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249417A (en) * | 2008-03-28 | 2008-08-27 | 合肥工业大学 | Concave-convex bar stone clay-trihydrate alumina/iron nano composite adsorbing agent, preparation and applications |
| CN101507911A (en) * | 2008-11-11 | 2009-08-19 | 中国科学院生态环境研究中心 | Defluorination absorbing material based on aluminum base composite oxides and its preparation method and use and special device of the preparation method |
| CN101423278A (en) * | 2008-11-24 | 2009-05-06 | 中国科学院生态环境研究中心 | Multiple element composite metal oxidate arsenic removal settling agent and use method thereof |
| CN101601989A (en) * | 2009-06-29 | 2009-12-16 | 云南大学 | The method of a kind of liquid absorbent and improvement water body in lake arsenic contamination |
Non-Patent Citations (1)
| Title |
|---|
| 梁美娜等: "铁铝复合氢氧化物对水中砷(Ⅴ)去除的初步研究", 《中国环境保护优秀论文集（2005）（下册）》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253788A (en) * | 2012-12-28 | 2013-08-21 | 中国科学院生态环境研究中心 | Method for removing fluorides in water through aluminum base composite metal oxide-based fluorine removing absorption material complexation-absorption |
| CN103253788B (en) * | 2012-12-28 | 2014-07-09 | 中国科学院生态环境研究中心 | Method for removing fluorides in water through aluminum base composite metal oxide-based fluorine removing absorption material complexation-absorption |
| CN105980044A (en) * | 2014-01-22 | 2016-09-28 | 荷兰联合利华有限公司 | A method of modifying surface characteristics of alumina |
| CN104326592A (en) * | 2014-10-09 | 2015-02-04 | 常州大学 | Method for restoration of heavy metal mercury in groundwater |
| CN106000330A (en) * | 2016-07-06 | 2016-10-12 | 中国科学院生态环境研究中心 | Hollow cubic iron-aluminum composite oxyhydroxide defluorination adsorbent based on electrospining immobilization |
| CN106179231A (en) * | 2016-07-06 | 2016-12-07 | 中国科学院生态环境研究中心 | A kind of hollow cube ferrum aluminum is combined preparation and the application process of oxyhydroxide de-fluoridation adsorbent |
| CN109694114A (en) * | 2019-02-01 | 2019-04-30 | 中南大学 | Application of the aluminium for ferrihydrite in absorption heavy metal |
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