CN100579648C - Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof - Google Patents
Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof Download PDFInfo
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- CN100579648C CN100579648C CN200610165427A CN200610165427A CN100579648C CN 100579648 C CN100579648 C CN 100579648C CN 200610165427 A CN200610165427 A CN 200610165427A CN 200610165427 A CN200610165427 A CN 200610165427A CN 100579648 C CN100579648 C CN 100579648C
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Abstract
The invention relates to preparation and application of haydite made of red mud modified by seawater as arsenic removal sorbent. Main technical characteristics of the invention lie in that haydite made of red mud, and residue in industrial production of alumina extracted with bauxite are adopted as raw materials; material that is prepared from haydite made of red mud that is modified by seawater and dips in nitric acid is adopted as arsenic removal sorbent for water, which is reprocessed by lye after absorption. The sorbent has low cost, simple preparation process and high arsenic removal efficiency, and is clean and innoxious. When the subject water is regulated to be acidic, arsenic removal performance of the sorbent can be improved, and after the absorption process, the sorbent is reprocessed with NaOH. The sorbent can be used as arsenic removal material for wastewater and drinking water.
Description
Technical field
The invention belongs to the environmental protection water-treatment technology field, particularly a kind of with preparation and the application process of sea-changed red mud porcelain granule as arsenic-removing adsorption agent.
Background technology
Arsenic is distributed widely in natural air, the water and soil earth, and endemic arsenic poisoning has caused worldwide extensive concern.In Xinjiang of the U.S., Germany, Japan, Argentina and China, countries and regions such as Inner Mongol, Guizhou are all relevant for the report of region arsenic disease.At present, arsenic removal technology mainly can be summarized as absorption method, Coagulation Method, ion-exchange, extraction, hyperfiltration, bioanalysis etc.Wherein, adsorption technology has characteristics such as efficient low-consume, technology be simple, thus in theory research and practical application, absorption method be use method the most widely.This method is mainly utilized the powerful suction-operated arsenic-adsorbing of adsorbent (having big active surface area or adsorption group), by filtration or with filter membrane adsorbent and absorbate is separated together then, thereby is reached the purpose of removing arsenic in the water.Dearsenicating method is based on absorption method, and the key of absorption method is the performance of adsorbent, and therefore the research to arsenic-removing adsorption agent is significant.Traditional sorbing material mostly is activated alumina, active carbon, ferriferous oxide etc., not only cost an arm and a leg and also have that adsorption capacity is limited, shortcomings such as the cycle of operation is short, so influenced its adsorption effect and practical application.
Summary of the invention
Red mud is the residue that bauxite is produced when highly basic leaches in the aluminum oxide production process, is bronzing and is called as red mud because of it is rich in iron oxide (20～50%).1 ton of aluminium oxide of every production just has 0.5～1.3 ton red mud to produce.China's aluminum oxide industry high speed development in recent years, the red mud accumulating amount sharply increases, and has not only taken a large amount of land resources, and soil, water body and atmospheric environment are constituted potential hazard.The red mud comprehensive utilization of resources is realized the refuse decrement to developing a circular economy, and preserving the ecological environment has meaning of crucial importance.Utilize red mud to prepare sorbing material in the water treatment, embodied the environment protection thought of " treatment of wastes with processes of wastes against one another ".The present invention is a raw material with the haydite of red mud manufacturing, adopts nitric acid dousing, sea-changed red mud porcelain granule as the water quality arsenic-removing adsorption agent, and this adsorbent preparation is simple, cleaning is harmless, cheap, is used for available alkali liquid regeneration after the arsenic removal.Its major technique content is: the anion that sea-changed red mud porcelain granule 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.
Sea-changed red mud porcelain granule preparation and application process thereof are as follows:
1, sea-changed red mud porcelain granule preparation method
1. red mud porcelain granule (Shandong Aluminium Industrial Corp's production) is at 20%-80%HNO
3Soak 24h in the solution.
2. filter HNO
3Back red mud porcelain granule 100 degree oven dry.
3. HNO
3The red mud porcelain granule that steeped immerses seawater 24h, stirs 1 time every 2-4h.
4. filtering sea is used as adsorption test behind the red mud porcelain granule 180 degree roasts.
2, dearsenicating method
Static dearsenicating method: get the arsenic-containing water of certain concentration of certain volume, as water sample alkalescence, then regulate the pH value to neutrality or faintly acid, add after the sea-changed red mud porcelain granule, 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: get adsorbent and be 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)) 0.5mg/L, calcium ion 20mg/L, pH=7, add adsorbent 100g, with the speed oscillation of 400r/min 4 hours, the centrifuging and taking supernatant was measured As (V) content and is lower than 0.05mg/L under 25 degree conditions, and eliminating rate of absorption reaches 98%.
Arsenic removal example 2 (dynamically)
The pending water sample that will contain pentavalent arsenic (As (V)) 0.5mg/L, calcium ion 20mg/L, pH=7 continuously by the adsorption column of internal diameter 2cm, absorption floor height 10cm, flows out 1000 milliliters of water samples with the flow velocity of 1ml/min, and the water outlet arsenic content surpasses 0.05mg/L yet.
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, reproducing adsorbent is used sea-changed processing more again with distilled water washing three times, can reuse.
Claims (2)
1, a kind of preparation method of As-dispelling sorbent for sea-changed red mud porcelain granule is characterized in that: the method for preparing As-dispelling sorbent for sea-changed red mud porcelain granule may further comprise the steps: 1. the red mud porcelain granule of Shandong Aluminium Industrial Corp's production is at 20%-80%HNO
3Soaked 24 hours in the solution; 2. filter HNO
3Back red mud porcelain granule 100 degree dry by the fire in; 3. HNO
3The red mud porcelain granule that steeped immersed seawater 24 hours, stirred 1 time every 2-4 hour; 4. filtering sea is an As-dispelling sorbent for sea-changed red mud porcelain granule after the red mud porcelain granule 180 degree roastings.
2, a kind of application process of As-dispelling sorbent for sea-changed red mud porcelain granule, the As-dispelling sorbent for sea-changed red mud porcelain granule that it is characterized in that adopting preparation method according to claim 1 to make is used for removing the anion that water contains arsenic, and adopts the regeneration of NaOH solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610165427A CN100579648C (en) | 2006-12-20 | 2006-12-20 | Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610165427A CN100579648C (en) | 2006-12-20 | 2006-12-20 | Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101204644A CN101204644A (en) | 2008-06-25 |
| CN100579648C true CN100579648C (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610165427A Expired - Fee Related CN100579648C (en) | 2006-12-20 | 2006-12-20 | Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084150B (en) * | 2011-11-08 | 2016-04-06 | 中国地质大学（北京） | A kind of degree of depth removes the preparation method of fluorine ion porous material in water |
| AU2013202654B1 (en) * | 2012-11-07 | 2014-04-03 | Rio Tinto Alcan International Limited | Treatment of alkaline bauxite residue |
| CN105107510A (en) * | 2015-09-10 | 2015-12-02 | 广西大学 | Modified red mud and preparation method and application thereof |
| US10287183B2 (en) * | 2016-03-10 | 2019-05-14 | Shenzhen Oukeli Technology Co., Ltd. | Electroplating wastewater treatment process using red mud, straw and seawater |
| CN108554365A (en) * | 2018-03-26 | 2018-09-21 | 广州大学 | A kind of uranium absorption agent and preparation method thereof |
| CN109126733B (en) * | 2018-09-29 | 2021-01-29 | 哈尔滨工业大学（深圳） | Preparation method of modified ceramsite combined filler for adsorbing pollutants |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030089665A1 (en) * | 2001-11-15 | 2003-05-15 | Engelhard Corporation | Arsenic removal media |
| 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 |
-
2006
- 2006-12-20 CN CN200610165427A patent/CN100579648C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030089665A1 (en) * | 2001-11-15 | 2003-05-15 | Engelhard Corporation | Arsenic removal media |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| Adsorption of arsenate from water using neutralized red mud. Hulya Genc,Jens Christian Tjell,David McConchie,OlafSchuiling.Journal of Colloid and Interface Science,Vol.264 . 2003 * |
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