CN104261536A - Efficient flocculating agent for rapidly removing heavy metals in water - Google Patents
Efficient flocculating agent for rapidly removing heavy metals in water Download PDFInfo
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- CN104261536A CN104261536A CN201410506618.5A CN201410506618A CN104261536A CN 104261536 A CN104261536 A CN 104261536A CN 201410506618 A CN201410506618 A CN 201410506618A CN 104261536 A CN104261536 A CN 104261536A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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Abstract
The invention relates to an efficient flocculating agent for rapidly removing heavy metals in water. The efficient flocculating agent comprises a mixture A and a mixture B, wherein the mixture A comprises the following components in parts by mass: 100 parts of No.2 Hangjin soil, 5-10 parts of soil bacteria and 15-25 parts of activated carbon; and the mixture B comprises the following components in parts by mass: 10-20 parts of iron oxide, 10-20 parts of iron chloride, 20-50 parts of poly-aluminum chloride, 2.5-5 parts of an organic flocculating agent, 25-50 parts of cement and 16-32 parts of sodium thiosulfate. The efficient flocculating agent disclosed by the invention can be used for rapidly and effectively removing a variety of heavy metals such as mercury, lead, chromium, cadmium, arsenic and copper in the water, is short in reaction time, cannot cause secondary pollution, can be directly fed without early dissolution, is simple in use method, and can be widely applied to removal of the heavy metals in various industrial wastewater, polluted underground water, lakes, rivers and reservoirs.
Description
Technical field
The present invention relates to a kind of efficient water treatment flocculant for trade effluent, polluted underground water, lake, river, reservoir.
Background technology
China Water body weight rnetal contamination problem is very outstanding, and the pollution rate of river,lake and reservior substrate is up to 80.1%.The basin sheet of ten large watersheds such as the Yellow River, Huaihe River, Song Hua River, the Liaohe River, the pollution level of heavy metals exceeding standard section is V class; In bottom mud in Taihu Lake, total Cu, total Pb, total Cd content are all in slight pollution level; In the main stream of Huangpu River surface deposit, Cd surpasses background value 2 times, Pb surpasses 1 times; In Suzhou River, Pb all exceeds standard, Cd be 75% to exceed standard, Hg 62.5% exceeds standard.Urban river have the section of 35.11% to occur total Hg surpasses surface water III class water body standard, the total Cd in section of 18.46% is more than III class water body standard, and the total Pb in section of 25% has the sample that exceeds standard to occur.The heavy metal contaminants total amount of being carried into sea by rivers such as the Changjiang river, the Zhujiang River, the Yellow River is about 3.4 ten thousand tons, huge to the pollution hazard of ocean water body.In the sample of national immediate offshore area seawater sampling, the exceeding standard rate of Pb reaches 62.9%, and maximum value surpasses a class seawater standard 49.0 times.The sedimental Cd content overproof of Dalian Bay 60% survey station, the content of Communities of The Jinzhou Bay part survey station sewage draining exit Marine Sediment Around Cd, Pb is more than the 3rd class oceanic sediment quality standard.
In current water, the removal technology of heavy metal mainly comprises flocculation sediment, absorption, ion-exchange, membrane sepn etc.Flocculent precipitation is one of important method removing Heavy Metals in Waters.Flocculation sediment technology mainly by system pH value is adjusted to a certain suitable scope, thus enables heavy metal ion form the sedimentation precipitation from water of the flosss such as solid hydroxide.In water, the method such as feeding lime stone, milk of lime or NaOH is common flocculation precipitation method.
The shortcomings such as traditional flocculation agent mainly comprises low molecule flocculation agent as aluminium salt system, molysite system, and they exist, and flocculation sediment speed is slow, loose easily broken, the medicine consumption of flco is high; Polymeric flocculant is as aluminum chloride hydrocarbon complex (PAC), polymerize aluminum chloride, bodied ferric sulfate etc., and its cost is higher, narrow application range, is subject to the impact of water temperature, pH value; Poly Dimethyl Diallyl Ammonium Chloride, as polyacrylamide flocculant etc., has strong neurotoxicity and certain carinogenicity, and large weight polyacrylamide remains for the treatment of producing polymer during waste water, destroys aqueous bio chain, and then has influence on human health.Meanwhile, unstable, the easy stripping heavy metal of the mud that traditional flocculant produces, not only can produce Dioxins during sludge incineration process, and due to containing unstable heavy metal flying dust, can cause new pollution to air.
Summary of the invention
In order to overcome the above-mentioned defect under prior art, the object of the present invention is to provide a kind of efficient flocculant (abbreviation flocculation agent) for removing heavy metal in water fast, all high-level efficiency heavy metal in water can be removed in the scope that pH value is 4-9, heavy metal is fixed on mud inside, not easily be dissolved, flco is firm not easily broken and settling velocity fast, can directly be added in water body during use, easy to operation.
Technical scheme of the present invention is:
A kind of efficient flocculant for removing heavy metal in water fast, comprise mixture A and mixture B, described mixture A comprises several components of following mass parts: 100 parts, Hanggin 2# soil, soil bacteria 5 ~ 10 parts, gac 15 ~ 25 parts, described mixture B comprises several components of following mass parts: ferric oxide 10 ~ 20 parts, 10 ~ 20 parts, iron(ic) chloride, polymerize aluminum chloride 20 ~ 50 parts, organic floculant 2.5 ~ 5 parts, cement 25 ~ 50 parts and 16 ~ 32 parts, Sulfothiorine.
Described Hanggin 2# soil preferably adopts granularity to be less than 74um, specific surface area 650-880m
2the Hanggin 2# soil of/g.
Described Hanggin 2# soil preferably adopts wherein polygorskite content to be not less than the Hanggin 2# soil of 28.1%.
Described gac is preferably the more fine-grained gac obtained after 100 mesh sieve screenings.
Described cement and can take calcium aluminate as the mixture of any one or arbitrary proportion multiple arbitrarily in the cement (abbreviation aluminous cement) prepared of main raw material for portland cement, high-alumina cement, pulverized fuel ash cement.
Described organic floculant can adopt Poly Dimethyl Diallyl Ammonium Chloride.
Described soil bacteria can be the combination of any one or arbitrary proportion multiple arbitrarily in withered grass bacterium, bacillus, green pus bacterium.
The preparation of the described efficient flocculant for removing heavy metal in water fast can adopt following steps: (1) mixes by each component of respective mass parts by the described mixture A of composition; (2) mix by each component of respective mass parts by the described mixture B of composition; (3) described mixture A and described mixture B Homogeneous phase mixing are obtained powder mixture.
Describedly comprise at least one in mercury, lead, chromium, cadmium, arsenic, copper for removing the removable heavy metal of the efficient flocculant of heavy metal in water fast.
During use, under well-beaten condition, be 4-6% to the dosage in sewage, remove the heavy metal in water through solidifying wadding.
Cardinal principle of the present invention is: first utilize oxidation, particulate form form that solvability heavy metal ion is changed into solid phase by reduction, absorption, sedimentation/coprecipitated degradation method, then by flocculation agent, it is precipitated removal from water.This flocculation agent is pulverous flocculation agent, do not need before using to dissolve, when it directly being added to after in sewage, the decomposition of pollutent is carried out in the effect of soil bacteria wherein, then the Hanggin 2# soil through adding, gac carry out modified-reaction to flco, carry out flocculation curing reaction subsequently under the cement added, Sulfothiorine, ferric oxide, polymerize aluminum chloride effect.Add Poly Dimethyl Diallyl Ammonium Chloride wherein when carrying out decomposition and modified-reaction, little by little dissolve and start flocculation and curing reaction, in addition, basic metal carbonate can also be added in flocculation agent, to promote neutralization and the flocculation reaction of the free acid in sewage.
Beneficial effect of the present invention is: due to Sulfothiorine, ferric oxide, the synergy of the compositions such as polymerize aluminum chloride and Hanggin 2# soil, can effectively by cadmium, chromium, mercury, plumbous, arsenic, nickel, zinc, copper, the heavy metal such as manganese and vanadium is by the effect such as physical adsorption and chemisorption, and form the solidifying wadding with good separation characteristic, the heavy metal class that can remove is many, removal effect is high, water outlet degree of purification is high, sludge condensation after separation and dehydration are easily, water content is low, be conducive to subsequent disposal, such as according to the experiment of applicant, in sludge press filtration treatment process, moisture percentage in sewage sludge before press filtration is more than 90%, moisture percentage in sewage sludge after press filtration is about 50%.
Embodiment
The invention provides a kind of efficient flocculant for removing heavy metal in water fast, comprise mixture A and mixture B, described mixture A comprises several components of following mass parts: 100 parts, Hanggin 2# soil, soil bacteria 5 ~ 10 parts, gac 15 ~ 25 parts, described mixture B comprises several components of following mass parts: ferric oxide 10 ~ 20 parts, 10 ~ 20 parts, iron(ic) chloride, polymerize aluminum chloride 20 ~ 50 parts, organic floculant 2.5 ~ 5 parts, cement 25 ~ 50 parts and 16 ~ 32 parts, Sulfothiorine.
Hanggin 2# soil is the clay mineral that a kind of natural particle size is comparatively thin, specific surface area is larger from Inner Mongolia Autonomous Region.Its main component is polygorskite (attapulgite), clinochlore, illite, calcite, quartz, feldspar etc.Hanggin 2# soil has larger specific surface area, it not only has the ability of good Adsorption of Heavy Metals, and himself is also containing lot of trace mineral element and rare earth, these trace quantity mineral elements all can react with the dissolved oxygen in waste water, dissociation acid ion in acidity, alkalescence, neutral environment, heavy metal is carried out being oxidized, reducing and being separated, produce hydrophobic flocculate solids, thus cleaning action is played to water.The 2# of Hanggin described in the present invention soil preferred size is less than 74um, specific surface area 650-880m
2/ g, preferred polygorskite content is not less than 28.1%.
Described gac is preferably the more fine-grained gac obtained after 100 mesh sieve screenings.Its specific surface area is large, and avtive spot is many, has the function of Adsorption heavy metal.
Described cement and can take calcium aluminate as the mixture of any one or arbitrary proportion multiple arbitrarily in the cement prepared of main raw material for portland cement, high-alumina cement, pulverized fuel ash cement.The adsorbable foul smell of cement and objectionable impurities, by the reaction of cement and water, can improve floc strength and density, improves the hydrophobicity of flco, significantly shorten sedimentation time, reduces the water ratio of the mud precipitated, and strengthens flocculating effect.
Described organic floculant can adopt Poly Dimethyl Diallyl Ammonium Chloride, and other also can be adopted to have the organic floculant of similar performance.
Described soil bacteria can be the combination of any one or arbitrary proportion multiple arbitrarily in withered grass bacterium, bacillus, green pus bacterium.They realize the removal of heavy metal in water by physical and chemical processes such as ion-exchange, complexing, carrier transdermal delivery.
Described Sulfothiorine and heavy metal produce and react, and form insoluble thiosulfuric acid metal compound.Ferric oxide plays good catalysis to pollutent flocculation, modification, significantly can accelerate the speed of flocculation reaction, shortens the flocculation reaction time.Iron(ic) chloride is ironic hydroxide flco at dissociation in water, the pollutent in water is had to the effect of flocculation removal, and obviously improves the dewatering of flocculating effect and mud.Polymerize aluminum chloride is soluble in sewage, and dissociates into polymerize aluminum chloride and sulfuric acid, and polymerize aluminum chloride can change into the aluminium hydroxide of the aluminium hydroxide of colloidal and the aluminium hydroxide polycondensation of band ion.The aluminium hydroxide of this polycondensation can reduce the interionic current potential of suspended substance in sewage.Cause the balance between contaminant ion to be destroyed, produce micropartical.Micropartical can make the material of organo-metallic class inorganization, adsorbs and fixes heavy metal ion, thus produces new flocculation and be separated.
The preparation of the described efficient flocculant for removing heavy metal in water fast can adopt following steps: (1) mixes by each component of respective mass parts by the described mixture A of composition; (2) mix by each component of respective mass parts by the described mixture B of composition; (3) described mixture A and described mixture B Homogeneous phase mixing are obtained powder mixture.Not only be conducive to thus utilizing the cooperation between different components to realize fully mixing, increase mixing efficiency and uniformity coefficient, but also achieve the optimization of flocculation agent internal microstructure, and then further improve flocculation agent service performance and decolorizing effect, according to the experimental observation of applicant, the discoloring agent prepared by above-mentioned substep is mixed together the product made relative to whole component, be easier to when adding mix in water, and flocculation rate is faster, the solidifying flocculus formed is larger, and the degree of purification of the ability that heavy metal pollutent adsorbs and water outlet is higher.
During use, flocculation agent of the present invention does not need to dissolve in advance, can directly be added in sewage, and rapid stirring speed is for being more than or equal to 300rpm, and the rapid stirring time is 5 minutes, and do not need to carry out low rate mixing, then rapid and natural sedimentation, the time only needs 5 minutes.Describedly comprise at least one in mercury, lead, chromium, cadmium, arsenic, copper for removing the removable heavy metal of the efficient flocculant of heavy metal in water fast.
Adopt flocculation reaction speed of the present invention quickly, through rapid stirring 5 minutes, then do not need to carry out low rate mixing, flco precipitated 5 minutes and just can obtain high-density flocs unit and good separating effect.The hydrophobicity of the mud of flocculation separation is very strong, and state is very stable, is not easy dispersion, dissolves.Meanwhile, the dehydration property of flocculation separation mud is very strong, and the smell of the mud after dehydration also reduces to some extent.Its soil property is modified as access expansion soil.Heavy metal class material contained by it can not stripping again.Organic septic matter residual in mud also can suppress by soil bacteria, As time goes on, can natural humify.Another advantage is that flocculation agent does not need to dissolve, and directly just can add, and uses easily.
Below the embodiment of several preparation of the present invention and heavy metals removal control experiment:
Embodiment 1:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 5kg, the gac of 15kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 10 kg, iron(ic) chloride 10 kg, polymerize aluminum chloride 20kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 2.5kg, cement 25kg and Sulfothiorine 16kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) chromic removal control experiment in water
Former water is industrial sewage, in former water, chromic concentration is 2.5mg/L, under well-beaten condition, respectively to adding the mass ratio of 5wt%(flocculation agent relative to former water in above-mentioned sewage, the flocculation agent of above-mentioned preparation down together) and conventional flocculant PAC, after routine mixing, flocculation, sedimentation and filtration, the detection method specified according to GB 8978-1996, records the chromic concentration of water outlet and is respectively 0.026mg/L, 2mg/L(.Sexavalent chrome aqueous concentration after the flocculation agent process of above-mentioned preparation is less than chromic emission concentration standard 0.5mg/L in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 2:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 15kg, iron(ic) chloride 15kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 35kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) chromic removal control experiment in water
Former water is industrial sewage, in former water, chromic concentration is 2.5mg/L, under well-beaten condition, flocculation agent and the conventional flocculant PAC of the above-mentioned preparation of 4wt% is added in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, record the chromic concentration of water outlet and be respectively 0.13mg/L, 2.0mg/L.Sexavalent chrome aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than chromic emission concentration standard 0.5mg/L in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 3:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 5kg, the gac of 25kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 10kg, iron(ic) chloride 20kg, polymerize aluminum chloride 20kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 2.5kg, cement 25kg and Sulfothiorine 16kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) plumbous in water removal control experiment
Former water is industrial sewage, concentration plumbous in former water is 2.0mg/L, under well-beaten condition, respectively to the flocculation agent of above-mentioned preparation and the conventional flocculant PAC that add 6wt% in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet lead is respectively 0.10mg/L, 1.5mg/L.Plumbous aqueous concentration after the flocculation agent process of above-mentioned preparation is less than emission concentration standard 1.0mg/L plumbous in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 4:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 15 kg, iron(ic) chloride 15 kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 35kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) plumbous in water removal control experiment
Former water is industrial sewage, concentration plumbous in former water is 2mg/L, under well-beaten condition, flocculation agent and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet lead is respectively 0.05mg/L, 1.5mg/L.Plumbous aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than emission concentration standard 1.0mg/L plumbous in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 5:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 10kg, the gac of 25kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 20 kg, iron(ic) chloride 20kg, polymerize aluminum chloride 50kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 5kg, cement 50kg and Sulfothiorine 32kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of arsenic in water
Former water is industrial sewage, in former water, the concentration of arsenic is 2.0mg/L, under well-beaten condition, respectively to the flocculation agent of above-mentioned preparation and the conventional flocculant PAC that add 5wt% in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet arsenic is respectively 0.018mg/L, 1.6mg/L.Arsenic aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than the emission concentration standard 0.5mg/L of arsenic in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 6:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 20kg, iron(ic) chloride 15kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 35kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of arsenic in water
Former water is industrial sewage, in former water, the concentration of arsenic is 2.0mg/L, under well-beaten condition, flocculation agent and the conventional flocculant PAC of the above-mentioned preparation of 6wt% is added in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet arsenic is respectively 0.08mg/L, 1.6mg/L.Arsenic aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than the emission concentration standard 0.5mg/L of arsenic in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 7:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 5kg, the gac of 15kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 10kg, iron(ic) chloride 10kg, polymerize aluminum chloride 20kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 2.5kg, cement 25kg and Sulfothiorine 16kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of mercury in water
Former water is industrial sewage, in former water, the concentration of mercury is 0.5mg/L, under well-beaten condition, respectively to the flocculation agent of above-mentioned preparation and the conventional flocculant PAC that add 4wt% in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet mercury is respectively 0.026mg/L, 0.35mg/L.Mercury aqueous concentration after the flocculation agent of above-mentioned preparation is less than the emission concentration standard 0.05mg/L of mercury in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 8:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 15kg, iron(ic) chloride 15kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 50kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of mercury in water
Former water is industrial sewage, in former water, the concentration of mercury is 0.5mg/L, under well-beaten condition, flocculation agent and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet mercury is respectively 0.015mg/L, 0.35mg/L.Mercury aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than the emission concentration standard 0.05mg/L of mercury in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 9:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 5kg, the gac of 15kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 10kg, iron(ic) chloride 10kg, polymerize aluminum chloride 20kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 2.5kg, cement 25kg and Sulfothiorine 16kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of cadmium in water
Former water is industrial sewage, in former water, the concentration of cadmium is 1.5mg/L, under well-beaten condition, respectively to the flocculation agent of above-mentioned preparation and the conventional flocculant PAC that add 6wt% in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet cadmium is respectively 0.05mg/L, 0.9mg/L.Cadmium aqueous concentration after the flocculation agent process of above-mentioned preparation is less than the emission concentration standard 0.1mg/L of cadmium in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 10:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 15kg, iron(ic) chloride 15kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 35kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of cadmium in water
Former water is industrial sewage, concentration plumbous in former water is 1.5mg/L, under well-beaten condition, flocculation agent and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet cadmium is respectively 0.03mg/L, 0.9mg/L.Cadmium aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than the emission concentration standard 0.1mg/L of cadmium in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 11:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 5kg, the gac of 15kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 10kg, iron(ic) chloride 10kg, polymerize aluminum chloride 20kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 2.5kg, cement 25kg and Sulfothiorine 16kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of copper in water
Former water is industrial sewage, in former water, the concentration of copper is 1.8mg/L, under well-beaten condition, respectively to the flocculation agent of above-mentioned preparation and the conventional flocculant PAC that add 5wt% in above-mentioned sewage, after routine mixing, flocculation, sedimentation and filtration, according to the detection method that GB 8978-1996 specifies, the concentration recording water outlet copper is respectively 0.03mg/L, 1.1mg/L.Copper aqueous concentration after the flocculation agent process of above-mentioned preparation is less than the emission concentration standard 0.5mg/L of copper in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 12:
(1) preparation of flocculation agent
1) get Hanggin 2# soil 100kg, add the soil bacteria of 8kg, the gac of 20kg wherein, mix, be mixed with mixture A;
2) get ferric oxide 15kg, iron(ic) chloride 15kg, polymerize aluminum chloride 35kg, organic floculant (Poly Dimethyl Diallyl Ammonium Chloride) 4kg, cement 35kg and Sulfothiorine 24kg respectively, mix, be mixed with mixture B;
3) namely mixture A and mixture B Homogeneous phase mixing are mixed with described flocculation agent.
(2) the removal control experiment of copper in water
Former water is industrial sewage, concentration plumbous in former water is 1.8mg/L, under well-beaten condition, add in above-mentioned sewage, the flocculation agent of the above-mentioned preparation of 4.5wt% and conventional flocculant PAC, after routine mixing, flocculation, sedimentation and filtration, the detection method specified according to GB 8978-1996, the concentration recording water outlet copper is respectively 0.02mg/L, 1.1mg/L.Copper aqueous concentration after the flocculation agent process of above-mentioned preparation is lower than the emission concentration standard 0.5mg/L of copper in " integrated wastewater discharge standard " (GB 8978-1996).
Under above-described embodiment, through the replacement experiment display of multiple concrete composition, described cement can adopt cement common arbitrarily or other adaptation cement, such as adopt portland cement, high-alumina cement, the mixture replacing of any one or arbitrary proportion multiple arbitrarily in pulverized fuel ash cement and aluminous cement, identical or similar effect can be obtained, described Poly Dimethyl Diallyl Ammonium Chloride can adopt other organic floculants with identical or similar characterization of adsorption to substitute, identical or similar effect can be obtained, described soil bacteria adopts withered grass bacterium, bacillus, in green pus bacterium any one or multiple arbitrarily, identical or similar effect can be obtained.
In above-mentioned any embodiment, all can add a kind of raw material of mixture as mixture B of any one or the arbitrary proportions several arbitrarily in sodium carbonate, calcium carbonate, magnesiumcarbonate and rhombspar, after adding this composition, contribute to, for the effective flocculation composition in flocculation agent provides more suitable reaction conditions, improving the dewatering of flocculating effect and sewage sludge further.
According to applicant, the heavy metal related in the industrial sewages such as paint, coating, store battery, smelting, five metals, machinery, plating, makeup, hair dye and muffle painting dishes is processed, amount to 101 experiments, flocculation agent of the present invention is when applied amount (flocculation agent is relative to the mass ratio of former water) is for 4-5.5%, according to above-mentioned processing mode, the clearance of heavy metal pollutent is:
Chromium: 71-76%;
Cadmium: 83-89.5%;
Mercury: 79-83%;
Plumbous: 62-71%;
Arsenic: 88.5-92%;
Nickel: 86.5-90.5%;
Zinc: 72-78%;
Copper: 81-89%,
And all reach relative national standards.
According to identical mechanism, the removal that the present invention is equally also adapted to other heavy metal contaminants can be known by inference.
The described soil bacteria that the present invention is used as raw material refers to that the soil bacteria goods containing this soil bacteria (make a general reference the compounding substances containing corresponding soils bacterium, preferably in powdery), can using corresponding soils bacterium goods commercially available at present as the raw material preparing mixture A, mixture A is together mixed to form with other components of mixture A, also corresponding soil bacteria bacterial classification can be extracted according to prior art from the sewage sludge related to, or rely on other bacterial classifications to originate, corresponding soil bacteria goods are prepared according to training methods that normal fermentation is cultivated or other are suitable for, with as the corresponding raw material preparing mixture A, usually, viable bacteria content in soil bacteria goods is preferably no less than 10,000,000,000/g, the proportioning of soil bacteria of the present invention calculates according to having above-mentioned viable bacteria content, if the soil bacteria product content adopted in practice is lower than above-mentioned content, should be converted to and there is above-mentioned content (minimum content, i.e. 10,000,000,000/g) soil bacteria goods, to determine actual amount.
Claims (10)
1. one kind for removing the efficient flocculant of heavy metal in water fast, it is characterized in that comprising mixture A and mixture B, described mixture A comprises several components of following mass parts: 100 parts, Hanggin 2# soil, soil bacteria 5 ~ 10 parts, gac 15 ~ 25 parts, described mixture B comprises several components of following mass parts: ferric oxide 10 ~ 20 parts, 10 ~ 20 parts, iron(ic) chloride, polymerize aluminum chloride 20 ~ 50 parts, organic floculant 2.5 ~ 5 parts, cement 25 ~ 50 parts and 16 ~ 32 parts, Sulfothiorine.
2. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that the granularity of described Hanggin 2# soil is less than 74um, specific surface area 650-880m
2/ g.
3. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described Hanggin 2# soil is that wherein polygorskite content is not less than the Hanggin 2# soil of 28.1%.
4. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described gac is the more fine-grained gac obtained after 100 mesh sieve screenings.
5. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described cement is portland cement, high-alumina cement, pulverized fuel ash cement and take calcium aluminate as the mixture of any one or arbitrary proportion multiple arbitrarily in the cement prepared of main raw material.
6. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described organic floculant adopts Poly Dimethyl Diallyl Ammonium Chloride.
7. as claimed in claim 1 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described soil bacteria is the combination of any one or arbitrary proportion multiple arbitrarily in withered grass bacterium, bacillus, green pus bacterium.
8. as the efficient flocculant for removing heavy metal in water fast in claim 1-7 as described in any one, it is characterized in that it adopts following steps to obtain: (1) mixes by each component of respective mass parts by the described mixture A of composition; (2) mix by each component of respective mass parts by the described mixture B of composition; (3) described mixture A and described mixture B Homogeneous phase mixing are obtained powder mixture.
9. as claimed in claim 8 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that described heavy metal comprises at least one in mercury, lead, chromium, cadmium, arsenic, copper.
10. as claimed in claim 9 for removing the efficient flocculant of heavy metal in water fast, it is characterized in that its using method is: under well-beaten condition, is 4-6% to the dosage in sewage, removes the heavy metal in water through solidifying wadding.
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| CN111484146A (en) * | 2020-04-23 | 2020-08-04 | 金满塘(天津)生物科技有限公司 | Chelating agent for removing heavy metal pollution from water body and preparation method and application thereof |
| CN111807483A (en) * | 2020-08-06 | 2020-10-23 | 中科乐美环保科技有限公司 | Flocculation and sterilization dual-function water treatment agent and preparation method thereof |
| CN113233558A (en) * | 2021-02-09 | 2021-08-10 | 翟晶 | Multifunctional medicament for treating fluorine-containing electronic industrial wastewater and preparation method thereof |
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