CN101176840B - Application method of iron modified red mud arsenic-removing adsorption agent - Google Patents
Application method of iron modified red mud arsenic-removing adsorption agent Download PDFInfo
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- CN101176840B CN101176840B CN2006101143898A CN200610114389A CN101176840B CN 101176840 B CN101176840 B CN 101176840B CN 2006101143898 A CN2006101143898 A CN 2006101143898A CN 200610114389 A CN200610114389 A CN 200610114389A CN 101176840 B CN101176840 B CN 101176840B
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- red mud
- arsenic
- adsorbent
- adsorption agent
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Abstract
The invention relates to an application using the ferrum modified red mud as an adsorbent removing arsenic, which is characterized in taking the residue-red mud from the industrial production of extracting alumina from bauxite as the materials, adopting the prepared materials with ferrum modified as the adsorbent removing arsenic from water quality, and regrowing using lye after adsorbing. Regulating the pending additive sample to acidity to improve the properties of removing arsenic, and the adsorbent after absorbing can adopt sodium hydroxide (NaOH) solution to regeneration. The adsorbent can be taken as the materials of removing arsenic from wastewater and drinking water. The invention the advantages of low price, simple technology of the preparation, cleanness, innocuity and the high rate of removing arsenic.
Description
Technical field
The invention belongs to water-treatment technology field, particularly a kind of with the application process of iron modified red mud as arsenic-removing adsorption agent.
Background technology
Arsenic (comprise simple substance and mostly compound) is a kind of extremely toxic substance, and industrial production such as copper metallurgy, zinc oxide production, insecticide factory, glass factory and mine drainage etc. all can produce a large amount of arsenic overstandard waste waters that contain.In addition, also contain arsenic in natural groundwater and the surface water.At present, the arsenic removal measure mainly can be summarized as absorption method, Coagulation Method, direct precipitation method, ion-exchange, extraction, hyperfiltration, bioanalysis etc.And in these methods, absorption method has efficiently, characteristics such as economic, convenient and easy, thus in theory research and practical application, absorption method be use method the most widely.In adsorption technology, problem such as at present extensively the adsorbent that adopts is mainly activated carbon and activated alumina etc., and these adsorbents exist and cost an arm and a leg, adsorption capacity is low.
Summary of the invention
The present invention is a raw material with residue-red mud that bauxite extracts in the aluminum oxide industry production, the material that adopts molysite modification preparation is as the water quality arsenic-removing adsorption agent, the preparation of this adsorbent is simple, cleaning is harmless, cheap, adsorption capacity is high, is used for available alkali liquid regeneration after the arsenic removal.Its major technique content is: the anion that iron modified red mud is used for removing water arsenic as adsorbent, pending water sample is adjusted to neutrality or slant acidity can improve the arsenic removal ability, increase calcium ion concentration and can improve its adsorption treatment effect, the adsorbent after the absorption adopts NaOH (NaOH) solution to regenerate.
Changed red mud preparation and application process thereof are as follows:
1, changed red mud preparation method
1. the 10g red mud adds 1000ml water, stirs 20 minutes.
2. prepare 0.5-1mol/L FeCl
36H
2O solution.
3. the red mud suspension is stirred on magnetic stirring apparatus, drip Fecl
3.6H
2O solution,
To red mud suspension pH value is to stop in 5 o'clock dripping, and leaves standstill and displays 1 month.
4. red mud is separated with centrifuge, use deionized water rinsing three times.
5. the red mud 55 degree oven dry after cleaning.
6. the red mud after the oven dry ground 80 order branches, got changed red mud.
2, dearsenicating method
Static dearsenicating method: get the arsenic-containing water of certain concentration of certain volume,, then regulate the pH value to neutrality or faintly acid as water sample alkalescence, by arsenic mass ratio in changed red mud and the water is to add changed red mud at 100: 1, stirred 4 hours, standing sedimentation, supernatant are the processed arsenic liquid that contains.Calcium ion can significantly improve the adsorption treatment effect in the water, as having calcium ion in the former water or adding the solubility salt of an amount of calcium, can reduce the adsorbent dosage.
Dynamic dearsenicating method: getting particle diameter is that 30 orders-100 order adsorbent is filled in the adsorption column that internal diameter is 2cm, absorption floor height 10cm in the post.Pending arsenic-containing water is at the uniform velocity added in the post from the column top, treat that the bottom contains arsenic above allowing out water concentration then to stop into water, will filling operation again behind the adsorbent reactivation.
The present invention will be further described below in conjunction with example:
Arsenic removal example 1 (static state)
Get the pending water sample that 1000ml contains pentavalent arsenic (As (V)) 1mg/L, calcium ion 5mg/L, pH=7, add iron modified red mud 100mg, with the speed oscillation of 400r/min 4 hours, the centrifuging and taking supernatant was measured As (V) content and is lower than 0.01mg/L under 25 degree conditions, and eliminating rate of absorption reaches 99%.
Arsenic removal example 2 (dynamically)
The pending water sample that will contain pentavalent arsenic (As (V)) 1mg/L, calcium ion 20mg/L, pH=7 passes through the adsorption column of internal diameter 2cm, absorption floor height 10cm continuously with the flow velocity of 1ml/min, flow out 1000 milliliters of water samples, the water outlet arsenic content does not surpass 0.01mg/L yet, can be used as safe drinking water.
3, adsorbent regeneration method
Adsorbent after the adsorbing separation is put into the 0.1M sodium hydroxide solution, and the sodium hydroxide solution consumption of every gram adsorbent is 20ml, and mixed liquor stirred 4 hours, centrifugation, and reproducing adsorbent is dried and was ground 80 mesh sieve branches, recycling with distilled water washing three times.
Claims (2)
1. the application process of an iron modified red mud arsenic-removing adsorption agent, it is characterized in that: adopt iron modified red mud arsenic-removing adsorption agent to be used for removing the anion that water contains arsenic as adsorbent, the preparation method of iron modified red mud arsenic-removing adsorption agent may further comprise the steps: 1. the 10g red mud adds 1000ml water, stirred 20 minutes, and 2. prepared 0.5-1mol/LFeCl
36H
23. O solution stir the red mud suspension on magnetic stirring apparatus, drip FeCl
36H
2O solution, to red mud suspension pH value is to stop in 5 o'clock dripping, leave standstill and display 1 month, 4. red mud is separated with centrifuge, with deionized water rinsing three times, the red mud 55 degree oven dry after 5. cleaning, 6. the red mud after the oven dry ground 80 order branches, changed red mud, the adsorbent that adsorb after saturated adopts NaOH solution to regenerate.
2. application process according to claim 1 is characterized in that: the concentration of NaOH solution is 0.1mol/L, and the regenerative response time is 4 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101143898A CN101176840B (en) | 2006-11-09 | 2006-11-09 | Application method of iron modified red mud arsenic-removing adsorption agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101143898A CN101176840B (en) | 2006-11-09 | 2006-11-09 | Application method of iron modified red mud arsenic-removing adsorption agent |
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| Publication Number | Publication Date |
|---|---|
| CN101176840A CN101176840A (en) | 2008-05-14 |
| CN101176840B true CN101176840B (en) | 2010-04-07 |
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| CN2006101143898A Expired - Fee Related CN101176840B (en) | 2006-11-09 | 2006-11-09 | Application method of iron modified red mud arsenic-removing adsorption agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825300A (en) * | 2019-02-19 | 2019-05-31 | 北京润鸣环境科技有限公司 | A kind of As polluted soil renovation agent and preparation method thereof and application method |
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|---|---|---|---|---|
| CN101844012B (en) * | 2009-03-27 | 2012-06-13 | 奇迪电器集团有限公司 | Filter medium for removing arsenic from drinking water and preparation method thereof |
| CN101559353B (en) * | 2009-05-12 | 2010-09-29 | 山东大学 | Preparation method of zinc chloride modified red mud |
| CN102115225A (en) * | 2009-12-30 | 2011-07-06 | 中国科学院生态环境研究中心 | Preparation and using methods for slurry type iron-based red mud arsenic removing agent |
| CN102233354A (en) * | 2010-05-06 | 2011-11-09 | 中国科学院生态环境研究中心 | Remediation method of arsenic (As)-contaminated soil |
| CN102504832A (en) * | 2011-11-30 | 2012-06-20 | 中国农业科学院农业环境与可持续发展研究所 | Soil arsenic passivator |
| CN103601311B (en) * | 2013-08-16 | 2015-02-04 | 崇义章源钨业股份有限公司 | Method for removing fluorine, phosphor, and arsenic from tungsten ion exchange wastewater |
| CN103880143B (en) * | 2014-04-09 | 2016-01-06 | 北华源（北京）科技有限公司 | Red mud is utilized to prepare the technique of arsenic removal composite |
| CN104941572A (en) * | 2015-06-29 | 2015-09-30 | 湖南农业大学 | Red mud composite material for wastewater treatment as well as preparation method and application of red mud composite material |
| CN109078608A (en) * | 2018-08-31 | 2018-12-25 | 中国环境科学研究院 | Arsenic-removing adsorption agent and preparation method and application based on iron modified activated aluminum oxide |
| CN109107524B (en) * | 2018-09-28 | 2020-05-08 | 同济大学 | Red mud adsorbent and preparation method and application thereof |
| CN110694585A (en) * | 2019-09-23 | 2020-01-17 | 北京工业大学 | Preparation method of zirconium modified red mud phosphorus removal adsorbent |
| CN112430745B (en) * | 2020-11-11 | 2023-01-31 | 昆明理工大学 | Slag adhering method for oxygen-enriched top-blown immersion smelting lead-smelting process spray gun |
| CN113772798A (en) * | 2021-09-13 | 2021-12-10 | 华南农业大学 | Method for removing tetracycline in water body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976383A (en) * | 1991-04-08 | 1999-11-02 | Romar Technologies, Inc. | Recycle process for removing dissolved heavy metals from water with aluminum particles |
| CN1506329A (en) * | 2002-12-10 | 2004-06-23 | 中国科学院生态环境研究中心 | Treating process of underground water with high arsenic content |
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2006
- 2006-11-09 CN CN2006101143898A patent/CN101176840B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976383A (en) * | 1991-04-08 | 1999-11-02 | Romar Technologies, Inc. | Recycle process for removing dissolved heavy metals from water with aluminum particles |
| CN1506329A (en) * | 2002-12-10 | 2004-06-23 | 中国科学院生态环境研究中心 | Treating process of underground water with high arsenic content |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825300A (en) * | 2019-02-19 | 2019-05-31 | 北京润鸣环境科技有限公司 | A kind of As polluted soil renovation agent and preparation method thereof and application method |
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|---|---|
| CN101176840A (en) | 2008-05-14 |
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