CN101100325B - Method for oxidizing and absorbing As (III) in water by water hyacinth root - Google Patents
Method for oxidizing and absorbing As (III) in water by water hyacinth root Download PDFInfo
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- CN101100325B CN101100325B CN2007100246143A CN200710024614A CN101100325B CN 101100325 B CN101100325 B CN 101100325B CN 2007100246143 A CN2007100246143 A CN 2007100246143A CN 200710024614 A CN200710024614 A CN 200710024614A CN 101100325 B CN101100325 B CN 101100325B
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- 238000000034 method Methods 0.000 title claims abstract description 56
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- 230000001590 oxidative effect Effects 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 abstract description 27
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 20
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229940000489 arsenate Drugs 0.000 description 2
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 description 2
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- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- FRLCRPUWDUKNGO-UHFFFAOYSA-N methoxyarsonic acid Chemical compound CO[As](O)(O)=O FRLCRPUWDUKNGO-UHFFFAOYSA-N 0.000 description 2
- QYPPRTNMGCREIM-UHFFFAOYSA-N methylarsonic acid Chemical compound C[As](O)(O)=O QYPPRTNMGCREIM-UHFFFAOYSA-N 0.000 description 2
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- 229940001516 sodium nitrate Drugs 0.000 description 2
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- 230000001988 toxicity Effects 0.000 description 2
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- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
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- 241000233805 Phoenix Species 0.000 description 1
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- Water Treatment By Sorption (AREA)
Abstract
This invention relates to the treatment of arsenic-containing wastewater. In this invention, the procedures are: collecting water hyacinth, and then washing, drying and cutting the roots, crushing roots into powder. Said powder and arsenic-containing water are fed into a vessel, agitating them intermittently. Finally, the powder and water are separated, to fulfil the treatment. The advantages of this invention are: simple operation, low cost, short treatment period, wide field of application, safety and suitable for commercialized treatment of wastewater.
Description
Technical field
The invention belongs to the prevention and cure of pollution field, relate to the method for utilizing As in oxidation of Herba Eichhorniae coring and the adsorbed water body (III).
Background technology
Arsenic element is arranged in the 5th main group of periodictable, and abundance is ranked the 20 in the earth's crust, approximately is one of component of 245 kinds of mineral.At nature, arsenic element can exist with the compound of many different shapes, the main arsenide of finding in water body has arsenus acid, As (III), arsenic acid, As (V) and their formed salts, the compound of inorganic arsenic can be converted into organic arsenide such as monomethyl arsenic acid (MMA) and dimethyl arsenate (DMA) etc. through microbial process in addition.The reason that causes occurring higher concentration arsenic in the water body has two broad aspect: the first, natural cause as volcanic eruption, and for example occurs in the low temperature volatilization of some arsenic-containing ores or the release that microbial process all can cause arsenic; The second, human factor, as industrial chemical industry discharging wastes, the melting of arsenic-containing ores, the burning of oil coal and contain use of arsenic chemical substance etc.
In general, arsenate, arsenite, dimethyl arsenate, methylarsonic acid are the main forms that arsenic contamination exists in the water surrounding.Wherein the toxicity of the arsenic of inorganics form (comprising arsenate and arsenite) is stronger than organoarsenic, and they all can cause acute or chronic murder by poisoning to organic respiratory system, Digestive tract, cardiovascular systems, neural system, hemopoietic system etc.Usually the main form of inorganic arsenic is As (V) under the oxidative environment condition, and As (III) mainly appears in the envrionment conditions of reductibility.Wherein As (III) resorbent speed in body is faster than As (V), and the toxicity of As (III) is more strong, thereby because it has the inactivation that avidity causes biological enzyme with the sulfydryl in the protein, organism is caused the murder by poisoning that is difficult to repair.In order to reduce the murder by poisoning of arsenic contamination to public health, U.S. environment protection tissue (USEPA) and The World Health Organization (WHO) all advise changing the greatest contamination level (MCL) of arsenic into 10 μ g/L from 50 μ g/L.
The improvement method of arsenic contamination mainly comprises at present: flocculation sedimentation, activated alumina method, absorption method, membrane processing method, anion exchange method, electrochemical method etc.Numerous aforesaid methods that studies show that are handled the effect of As (III) not as good as As (V) ideal, so usually will be before handling earlier through As (III) being oxidized to the process of As (V), and As (III) is converted into the speed of As (V) in air and pure oxygen slower, usually needs the auxiliary of other reagent (as ozone, chlorine, hypochlorite, dioxide peroxide or hydrogen peroxide etc.) could improve oxidation rate.This will increase operation easier and cost that As (III) removes undoubtedly, thereby influences the promotional value of these methods.
Therefore develop easy, efficient, economy and environmental friendliness and be applicable to the surface water of countries and regions underdeveloped and underground water in the improvement method polluted of As (III) very important practical significance is arranged.
Herba Eichhorniae (Eichhornia crassipes), be commonly called as Herba Eichhorniae, belong to Pontederiaceae, the phoenix eyes Nelumbo is the perennial weeds that swim, under suitable condition, just can breed a new plant in per 5 days, live in torrid areas and subtropical zone, like high temperature and moistening weather, 28-30 ℃ is the optimal temperature of its growth, reproduction speed reached the 160-1000 kg/ha * days, under some water nutrition condition even higher.
Herba Eichhorniae originates in South America, and it not only grows, breeds fast, and has higher nutritive value, since last century six, the seventies China introduced a fine variety Herba Eichhorniae, for aquaculture has been made very big contribution.Simultaneously the physilogical characteristics because extremely strong adaptability of Herba Eichhorniae and breeding thereof are exceedingly fast etc. have also been brought some negative effects, cover the water surface as raised growth breeding back, stop up the river course, and transportation causes obstruction to waterborne traffic; The septic pasture and water of part give out peculiar smell, influence water quality, threatening environment; In the vitellarium, form the advantage species, influence other hydrobiological growths, destroy local ecotope etc.
Further investigation along with to Herba Eichhorniae it is found that, except above-mentioned feed ingredient function, itself also has very strong absorption cleaning effect to nitrogen in the water body and phosphorus, can be used for the biological treating of eutrophication water.In addition, Herba Eichhorniae can also effectively be removed in the water toxic substance such as cadmium, mercury, arsenic, chromium, lead, copper, zinc that human body is had serious harm, and effect is much higher than other waterplant (as Scirpus tabernaemontani, duckweed etc.), and people have begun to utilize it to come purified industrial, sanitary sewage.
Be primarily aimed at the live body plant of this plant at present about the research of Herba Eichhorniae enrichment pollutent, but utilize the live body Herba Eichhorniae to administer the influence that sewage is subjected to this vegetative season, region and water body (sewage quality may influence the growth of Herba Eichhorniae), and may cause local Ecological environment worsening, be unfavorable for the industrialization running.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of economy, efficient, simple to operate, consuming time less, be suitable for region wide and environmentally safe, friendly utilize Herba Eichhorniae (Eichhornia crassipes) coring oxidation and absorption and remove the method for As (III) in the water body.
Present technique is at the water body (including but not limited to surface water or underground water, hereinafter to be referred as water) that polluted by As (III).
The contriver finds that in research work the Herba Eichhorniae coring has oxidation and the adsorption function to As (III) concurrently, and the exsiccant coring has this function equally.So compare with using the live body Herba Eichhorniae, utilizing coring behind this plant drying to handle the water body that polluted by As (III) has characteristics: 1, needn't be subject to the Herba Eichhorniae season of growth, region and water body factors such as (sewage quality may influence the growth of Herba Eichhorniae); 2, bring negative impact can for local ecotope.
The objective of the invention is to realize by following technical measures:
Utilize the method for As in oxidation of Herba Eichhorniae coring and the adsorbed water body (III), its step is as follows:
A, collection Herba Eichhorniae are cleaned and are dried, and intercept its coring, through the break process powdered;
B, Herba Eichhorniae coring powder and the water that polluted by As (III) are added container, and adopt intermittently stirring method to handle appropriate time;
Water after c, the separating treatment and Herba Eichhorniae coring powder get final product.
Described method, wherein Herba Eichhorniae coring powder is that length is not more than 0.5 centimetre powder.
Described method, its discontinuous stirring was stirred once for per 6～9 hours, and stir the time length is 5～10 minutes at every turn.
Described method, wherein adopting the time of stir process at intermittence is 30～45 hours.
Described method, wherein As (III) concentration is not more than under the condition of 150 μ g/L in the water body, and the usage quantity of Herba Eichhorniae coring powder is 1: 60～250 with the water body mass ratio that polluted by As (III); The usage quantity of preferred Herba Eichhorniae coring powder is 1: 60～100 of the water body quality that is subjected to As (III) and pollutes; Further, the usage quantity of preferred Herba Eichhorniae coring powder is 1% of the water body quality that is subjected to As (III) and pollutes.
Described method, method according to claim 1 is characterized in that the separation method among the step c is to adopt 200 eye mesh screens that the water after handling is separated with Herba Eichhorniae coring powder.
This method is reacted at ambient temperature.
Further specify the present invention below in conjunction with Figure of description:
The collection Herba Eichhorniae is cleaned and is dried, and intercepts its coring, is not more than 0.5 centimetre powder through break process to length;
As shown in Figure 1, the water 1 that polluted by As (III), Herba Eichhorniae coring powder 2 adds in the premixing tank 3, in premixing tank, adopt mechanical stirring device 4, the water, the Herba Eichhorniae coring powdered mixture that polluted by As (III) that adds carried out stirring intermittence (stirring once time length 5-10 minute in per 8 hours), handled 30～45 hours.By 200 screen clothes 7, the water body 8 after the purification enters holding tank 9 to water, the pipeline 6 of coring mixture 5 through having valve that will cross through premix, balance more then.
In the treating processes, the add-on of coring is by pending water body quality and the wherein concentration decision of As (III).Be preferably 1/100 of water body weight for the additional proportion that is not more than the water body coring of 150 μ gL for As (III) concentration.Per 8 hours tool stir abouts 5-10 minute were intermittently handled 36 hours, and degree of oxidation is bordering on 100% and absorption removal efficient reaches 92%.
This method is reacted at ambient temperature.
Beneficial effect of the present invention:
Present technique is at the water that polluted by As (III).By in water, adding this waterplant coring and intermittently stirring, by the sepn process of this waterplant coring of filtering separation, can effectively As (III) be converted into As (V), and remove this pollutent again.At As (III) starting point concentration is 150 μ g/L, the additional proportion of coring is about valence state transformation efficiency nearly 100% under 1/100 the condition of water body weight, eliminating rate of absorption is about 92% and uses water concentration and effectively reduce to existing environmental standard following (11.7 μ g/L) (at the arsenic contamination of lower concentration or reduce under the condition of mass ratio of water and this plant root whisker, this method has more good effect, sees the disclosed effect of embodiment for details).This method is applicable to the improvement of the drinking water resource that is subjected to As (III) pollution, and the small-scale drink water purifying that also can be used for the individual consumer is handled.This method does not have particular requirement to operationlocation, is not subjected to the restriction in live plant growth place, and requires low, simple to equipment and operational condition.Can directly near contaminated place, operate, and can gather materials on the spot, thereby save the transportation cost of governance process greatly, and the operating time is short, help the industrialization utilization; This waterplant biomass that this method is used is big, and reproductivity is extremely strong, and is cheap and easy to get, need not to add other medicaments, easy and simple to handle, with low cost.And environmentally safe, friendly, can not cause secondary pollution and can not endanger local ecotope.And the treatment effect of this method is not subjected to the humic acid of common concentration in surface water and the body of groundwater substantially and comprises that the anionic of carbonate, nitrate radical and sulfate radical influences.
Description of drawings
Fig. 1 is that the present invention utilizes the Herba Eichhorniae coring to handle the water body synoptic diagram that polluted by As (III).
1 for being subjected to the water body of As (III) pollution among the figure, and 2 is the Herba Eichhorniae coring, and 3 is premixing tank, and 4 is whipping appts, and 5 are water, coring mixture through sneaking out in advance, and 6 for having the pipeline of valve, and 7 is separating screen, and 8 are the water body after filtering, and 9 is holding tank.
Embodiment
The invention will be further elaborated by the following examples.
Embodiment 1
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 150 μ g/L, hereinafter referred to as contaminated water.
Treatment process: the collection Herba Eichhorniae is cleaned and is dried, and intercepts its coring, is not more than 0.5 centimetre powder through break process to length; In conjunction with Figure of description, with contaminated water 1, Herba Eichhorniae coring powder 2 adds in the premixing tank 3, the usage quantity of Herba Eichhorniae coring powder is 1: 100 with the water body mass ratio that polluted by As (III), in premixing tank, adopt mechanical stirring device 4, per 8 hours intermittences, mechanical stirring was about 5-10 minute, continued 36 hours.To pass through 200 screen clothes 7 through water, the pipeline 6 of coring mixture 5 through having valve of sneaking out in advance then, the water body 8 after the filtration enters holding tank 9.Above treating processes is all carried out at ambient temperature.
Ordinary tap water contains As (III) and reaches 150 μ g/L, add coring according to 1/100 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 11.7 μ gL, clearance 92%, and As (III) all is converted into As (V).
Embodiment 2
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 60 μ g/L, to investigate under the low arsenic concentration condition treatment effect when reducing this plant root whisker consumption.
Treatment process is with embodiment 1.
Ordinary tap water contains As (III) and reaches 60 μ gL, add Herba Eichhorniae coring powder according to 1/250 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 12.8 μ gL, clearance 79%, and As (III) all is converted into As (V).
Embodiment 3
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 30 μ gL, to investigate under the lower arsenic concentration condition treatment effect when reducing this plant root whisker consumption.
Treatment process is with embodiment 1.
Ordinary tap water contains As (III) and reaches 30 μ gL, add Herba Eichhorniae coring powder according to 1/250 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 7.2 μ g/L, clearance 76%, and As (III) all is converted into As (V).
Embodiment 4
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 150 μ g/L, and allocates sodium bicarbonate into and make its concentration reach 2mM.
Treatment process is with embodiment 1.
Ordinary tap water contains As (III) and reaches 150 μ g/L, add Herba Eichhorniae coring powder according to 1/100 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 13.7 μ g/L, clearance 91%, and As (III) all is converted into As (V).
Embodiment 5
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 150 μ g/L, and allocates sodium sulfate into and make its concentration reach 1mM.
Treatment process is with embodiment 1.
Ordinary tap water contains the sodium sulfate that As (III) reaches 150 μ g/L and contains 1mM concentration, add Herba Eichhorniae coring powder according to 1/100 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 13.0 μ g/L, clearance 92%, and As (III) all is converted into As (V).
Embodiment 6
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 150 μ g/L, and allocates SODIUMNITRATE into and make its concentration reach 1mM.
Treatment process is with embodiment 1.
Ordinary tap water contains the SODIUMNITRATE that As (III) reaches 150 μ g/L and contains 1mM concentration, add Herba Eichhorniae coring powder according to 1/100 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, As (III) concentration is 14.2 μ gL in the sand launder filtration after water body afterwards through separating, clearance 90%, and As (III) all is converted into As (V).
Embodiment 7
Ordinary tap water is allocated Sodium metaarsenite into makes As (III) concentration reach 150 μ g/L, and allocates humic acid into and make its concentration reach 20mg/L.
Treatment process is with embodiment 1.
Ordinary tap water contains the humic acid that As (III) reaches 150 μ g/L and contains 20mg/L concentration, add Herba Eichhorniae coring powder according to 1/100 of water body quality, intermittently stirred 5-10 minute in per 8 hours, after the lasting 36 hours balances, through As (III) concentration in the water body after the sand launder filtration after is 17.3 μ g/L, clearance 88%, and As (III) all is converted into As (V).
Claims (7)
1. utilize the method for As in oxidation of Herba Eichhorniae coring and the adsorbed water body (III), it is characterized in that adopting following steps:
A, collection Herba Eichhorniae are cleaned and are dried, and intercept its coring, through the break process powdered;
B, Herba Eichhorniae coring powder and the water that polluted by As (III) are added container, and adopt intermittently stirring method to handle appropriate time;
Water after c, the separating treatment and Herba Eichhorniae coring powder get final product;
Wherein: intermittently stirring was stirred once for per 6～9 hours, and stir the time length is 5～10 minutes at every turn; Adopting intermittently, the time of stir process is 30～45 hours.
2. method according to claim 1 is characterized in that Herba Eichhorniae coring powder is that length is not more than 0.5 centimetre powder.
3. method according to claim 1 is characterized in that As in water body (III) concentration is not more than under the condition of 150 μ g/L, and the usage quantity of Herba Eichhorniae coring powder is 1: 60～250 with the water body mass ratio that polluted by As (III).
4. method according to claim 3 is characterized in that As in water body (III) concentration is not more than under the condition of 150 μ g/L, and the usage quantity of Herba Eichhorniae coring powder is 1: 60～100 with the water body mass ratio that polluted by As (III).
5. method according to claim 4 is characterized in that As in water body (III) concentration is not more than under the condition of 150 μ g/L, and the usage quantity of Herba Eichhorniae coring powder is 1% of the water body quality that is subjected to As (III) and pollutes.
6. method according to claim 1 is characterized in that the separation method among the step c is to adopt 200 eye mesh screens that the water after handling is separated with Herba Eichhorniae coring powder.
7. method according to claim 1 is characterized in that this method reacts at ambient temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100246143A CN101100325B (en) | 2007-06-25 | 2007-06-25 | Method for oxidizing and absorbing As (III) in water by water hyacinth root |
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| CN2007100246143A CN101100325B (en) | 2007-06-25 | 2007-06-25 | Method for oxidizing and absorbing As (III) in water by water hyacinth root |
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| CN101100325B true CN101100325B (en) | 2010-10-27 |
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| CN101862641B (en) * | 2010-06-25 | 2012-01-11 | 东华大学 | Water hyacinth compound non-woven adsorption material and preparation method thereof |
| CN102152524A (en) * | 2010-12-21 | 2011-08-17 | 东华大学 | Non-woven sewing material filled with water hyacinth particles and preparation method thereof |
| CN102631889B (en) * | 2012-05-05 | 2014-07-02 | 常州亚环环保科技有限公司 | Eichhornia crassipes adsorbing material and preparation method thereof |
| CN103931474B (en) * | 2014-03-14 | 2015-09-16 | 杭州爱立特生态环境科技有限公司 | A kind of Eichhornia crassipes breeding method and adopt this Eichhornia crassipes to survey arsenic to surpass calibration method |
| CN107117681A (en) * | 2017-06-23 | 2017-09-01 | 湖北双竹生态食品开发股份有限公司 | A kind of method of Roots of Medicinal Plants purifying drinking water |
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