CN101274264B - Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same - Google Patents
Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same Download PDFInfo
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- CN101274264B CN101274264B CN2007100648230A CN200710064823A CN101274264B CN 101274264 B CN101274264 B CN 101274264B CN 2007100648230 A CN2007100648230 A CN 2007100648230A CN 200710064823 A CN200710064823 A CN 200710064823A CN 101274264 B CN101274264 B CN 101274264B
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Abstract
The invention relates to a preparation technique and an application method of composite adsorption material which can effectively remove excessive arsenic in drinking water. The invention uses cheap natural siderite and natural hematite as raw material which is then crushed and controlled within a certain granularity range; the two mine materials are mixed by a certain proportion to obtain the required composite adsorbent used for removing the arsenic in the drinking water. The composite adsorbent is characterized in that the composite adsorbent is clean without harms, has low cost, large adsorption capacity of arsenic and stable performance, and is suitable for arsenic removal technique of the drinking water of different scales. The material can be used as filter material; the arsenic removal effect is the best under the conditions of 20 DEG C of the temperature, 6.5-7.5 of pH, and 30 minutes of empty bed contact time.
Description
Technical field the invention belongs to water-treatment technology field, and particularly a kind of water treatment is with the preparation of arsenic-removing adsorption agent and the arsenic removal application process that adapts with it.Arsenic-removing adsorption agent of the present invention and matching method can effectively be removed arsenic excessive in the former water, arsenic content during effectively control is purified waste water.
Technical background arsenic is a kind of carcinogenic substance, also is a kind of material of inducing mutant organism, and it can produce harm to the human immune system.The unusual enrichment of underground water arsenic has threatened that the several hundred million residents' in the world is healthy under the natural endowment.In addition, after the arsenic of human being's production technical activity discharging enters water environment, aggravated the harm of arsenic to health.The high arsenic water of long-term drinking (arsenic content is greater than 50 μ g/L) can cause arsenicalism (comprising weak, tired, decrease of memory, Keratoderma, nail depression, trunk pigment anomaly, polyneuritis, auditory system damage etc.), improves human body cancer (such as cutaneum carcinoma, carcinoma of urinary bladder and the prostate cancer etc.) incidence of disease.The population that China mainland is influenced by drinking water arsenic reaches 4,000,000, and mainly concentrates on the Northwest underdeveloped, such as Xinjiang, the Inner Mongol, Shanxi etc.Reducing drinking water arsenic content is the fundamental way that reduces these symptom incidences of disease.At present, the technology that is used for the water quality arsenic removal mainly is coagulating sedimentation technology and adsorption technology.The coagulating sedimentation technology is comparatively ripe, but can produce a large amount of chemical sludges, and the relative difficulty with disposal of the processing of these mud is dealt with improperly and can be produced secondary pollution.In adsorption technology, at present the adsorbent that adopts is mainly activated alumina and active carbon etc., and these adsorbents exist and cost an arm and a leg, adsorption capacity is low or problem such as adsorbent stripping.
It is raw material that summary of the invention the present invention adopts cheap natural siderite and natural bloodstone, and two kinds of natural minerals mix according to a certain percentage can obtain needed Removal of Arsenic in Drinking Water compound adsorbent.This compound adsorbent cost is low, the cleaning is nontoxic, high adsorption capacity, stable performance, long service life.Its major technique content is: natural siderite and natural bloodstone are pulverized, obtain their optimum grain-diameter respectively, the adsorbent of two kinds of optimum grain-diameters is mixed with certain proportion, and resultant compound adsorbent can effectively be removed the anion (comprising arsenate and arsenous anion) of arsenic in the water.
The methods for making and using same of specific implementation method composite adsorbing agent for effectively removing arsenic is as follows:
1, the preparation method of composite adsorbing agent for effectively removing arsenic
The natural siderite that adopts is made up of 75-80% siderite, 15-20% goethite and 1-5% chalcopyrite, and natural bloodstone is made up of 80-86% bloodstone, 3-5% goethite, 1-5% siderite and 1-5% mica.Be processed to form the optimal adsorption particle diameter through pulverizing, wherein natural siderite is 0.10-0.50mm, and natural bloodstone is 0.25-1.00mm.Composite adsorbing agent for effectively removing arsenic is mixed by natural siderite particle of 0.10-0.50mm and the natural bloodstone uniform particles of 0.25-1.00mm, and each weight percentages of components of the compound adsorbent that mixes is: natural siderite 60-80%; Natural bloodstone 20-40%.
2, dearsenicating method
Static dearsenicating method: the arsenic-containing water of getting certain concentration of certain volume, as water sample is alkalescence, then regulate the pH value to neutrality or faintly acid, by compound arsenic-removing adsorption agent and arsenic-containing water mass ratio is that 1:500 adds compound adsorbent, stirred 2 minutes in per 8 hours, standing sedimentation after 24 hours, supernatant are processed arsenic-containing water.
Dynamic dearsenicating method: get compound adsorbent and be filled in the adsorption column that internal diameter is 3cm, absorption floor height 15cm in the post.Pending arsenic-containing water is at the uniform velocity added in the post from the column bottom, treat that the top water outlet contains arsenic above allowing out water concentration then to stop into water.
Arsenic removal example 1 (static state) is got 50mL and is contained pentavalent arsenic (As (V)) 1000 μ g/L, Na
+The pending water sample of=0.01mol/L, pH=6.8 adds compound arsenic removing agent 0.1g, under 20 ℃ of conditions, leaves standstill 24 hours (stirring 2 minutes in per 8 hours), and it is 50 μ g/L that the centrifuging and taking supernatant is measured As (V) content, and eliminating rate of absorption reaches 95%.
Arsenic removal example 2 (dynamically) will contain pentavalent arsenic (As (V)) 1000 μ g/L, Na
+The pending water sample of=0.01mol/L, pH=6.8 is the adsorption column of 3cm, absorption floor height 15cm by internal diameter with the flow velocity of 2.15mL/min continuously, flows out water sample 300L, and the water outlet arsenic content does not surpass 10 μ g/L yet, can be used as safe drinking water.
Claims (2)
1. the compound adsorbent of a Removal of Arsenic in Drinking Water, it is characterized in that, it is by the natural siderite that mainly contains ferrous carbonate and maintenance certain particle size, and by mainly containing iron oxide and keeping the natural bloodstone of certain particle size to mix, wherein the percentage of each ingredients constitute gross weight is:
Natural siderite: 60-80%
Natural bloodstone: 20-40%,
Wherein, described natural siderite is made up of 75-80% siderite, 15-20% goethite and 1-5% chalcopyrite, described natural bloodstone is made up of 80-86% bloodstone, 3-5% goethite, 1-5% siderite and 1-5% mica, and each constituent content sum is 100%.
2. compound adsorbent as claimed in claim 1 is characterized in that: the granularity of each component materials that adopts is:
Natural siderite: 0.10-0.50mm
Natural bloodstone: 0.25-1.00mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100648230A CN101274264B (en) | 2007-03-28 | 2007-03-28 | Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007100648230A CN101274264B (en) | 2007-03-28 | 2007-03-28 | Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same |
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| Publication Number | Publication Date |
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| CN101274264A CN101274264A (en) | 2008-10-01 |
| CN101274264B true CN101274264B (en) | 2010-12-01 |
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| CN2007100648230A Expired - Fee Related CN101274264B (en) | 2007-03-28 | 2007-03-28 | Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019165B (en) * | 2009-09-09 | 2013-09-18 | 中国科学院生态环境研究中心 | Composite metal oxide absorbent for arsenic removal and preparation method of the same |
| CN102233256A (en) * | 2010-04-30 | 2011-11-09 | 中国地质大学（北京） | Preparation method of arsenic removal adsorbent and arsenic removal adsorbent |
| CN103882912B (en) * | 2014-03-28 | 2015-03-18 | 中国地质大学（武汉） | Home-position arsenic removal single well based on siderite filter materials |
| CN105692853B (en) * | 2016-04-27 | 2018-11-06 | 合肥工业大学 | A method of removing arsenic in water removal using nanometer bloodstone |
| BR102016022626B1 (en) * | 2016-09-29 | 2021-06-01 | Petróleo Brasileiro S.A. - Petrobras | SIMULTANEOUS REMOVAL PROCESS OF ARSENIC AND SULFUR FROM HYDROCARBON CHAINS |
| CN107954549A (en) * | 2017-12-04 | 2018-04-24 | 天津科技大学 | A kind of absorption-aeration-nanofiltration group technology and its special purpose device for arsenic-containing water processing |
| CN108499516A (en) * | 2018-04-03 | 2018-09-07 | 中国神华能源股份有限公司 | Support type arsenic adsorbent and its preparation method and application and the method for arsenic removing |
| CN108559515B (en) * | 2018-04-05 | 2021-08-27 | 海峡绿色(福建)建筑科技发展有限公司 | Iron tailing based heavy metal contaminated soil stabilizer and preparation method thereof |
| CN109046228A (en) * | 2018-07-12 | 2018-12-21 | 华中农业大学 | A kind of goethite and its preparation method and application |
| CN112176195B (en) * | 2020-09-18 | 2022-05-10 | 中南大学 | Method for removing arsenic from arsenic-containing smoke dust |
Citations (2)
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| CN1248486A (en) * | 1999-09-29 | 2000-03-29 | 清华大学 | Ferri-rareearth element compound water treatment adsorbent and preparation process thereof |
| CN1473771A (en) * | 2003-08-06 | 2004-02-11 | 中国地质大学（武汉） | Method for removing arsenic and cadmium from waste water |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248486A (en) * | 1999-09-29 | 2000-03-29 | 清华大学 | Ferri-rareearth element compound water treatment adsorbent and preparation process thereof |
| CN1473771A (en) * | 2003-08-06 | 2004-02-11 | 中国地质大学（武汉） | Method for removing arsenic and cadmium from waste water |
Non-Patent Citations (3)
| Title |
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| JP昭55-132633A 1980.10.15 |
| 张巧丽等.氧化铁/活性炭复合吸附材料去除水中砷的研究.同济大学学报（自然科学版）34 12.2006,34(12),1647-1650，1661. |
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