CN102730784A - Method for removing nitrogen and phosphorus by modifying sintered red mud - Google Patents
Method for removing nitrogen and phosphorus by modifying sintered red mud Download PDFInfo
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- CN102730784A CN102730784A CN201210247140XA CN201210247140A CN102730784A CN 102730784 A CN102730784 A CN 102730784A CN 201210247140X A CN201210247140X A CN 201210247140XA CN 201210247140 A CN201210247140 A CN 201210247140A CN 102730784 A CN102730784 A CN 102730784A
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Abstract
The invention relates to a method for removing nitrogen and phosphorus by modifying sintered red mud. By modifying red mud through acid, the alkalinity of the sintered red mud is reduced, the adsorability of the sintered red mud is improved, the application range of the sintered red mud is expanded, and environment pollution is reduced. The method is mainly characterized by comprising the steps: taking sintered red mud generated in the aluminum oxide industry as raw materials, adding hydrochloric acid according to certain solid-to-liquid ratio, mixing in a water bath kettle, and centrifugally drying to preparing the modified sintered red mud adsorbent. The prepared adsorbent is fed in nitrogen and phosphorus-contained sewage according to certain proportion, to achieve the purpose of removing nitrogen and phosphorus. Compared with a commonly-used bayer's method red mud adsorbent, the nitrogen and phosphorus adsorability is obviously improved under different pH or feeding amount. Therefore, the method has the advantages of being simple to prepare, small in feeding amount, wide in pH application range, low in cost and the like. The prepared adsorbent can be used for removing nitrogen and phosphorus in industrial sewage, city sewage and natural water bodies.
Description
Technical field
The present invention relates to a kind of modification red mud from sintering process and remove the method for nitrogen phosphorus in the sewage, belong to water technology and solid waste comprehensive utilization field.
Background technology
Nitrogen, phosphorus are the necessary nutritive elements of each organism growth of water ecosystem.In recent years, along with the aggravation of mankind's activity, excessive nitrogen, phosphorus enter water body; Cause that algae and other waterplant breed unusually in the receiving water body; Body eutrophication makes that further water transparency descends, dissolved oxygen content reduces, water quality deterioration, and the aquatic system function is impaired.
The treatment process that reduces water body nitrogen, phosphorus content at present both at home and abroad can be divided into physics method, chemical method and biological process.Traditional biological denitrificaion method mainly is the nitrated/denitrification that relies on mikrobe, and it is high to remove efficient, but operational administrative is complicated, and anti-nitrogen impact property is poor.The ion exchange method processing efficiency is high, simple to operate, is showing stronger advantage aspect the nitrogen removal, but the expensive widespread use that has limited it.Therefore, absorption method efficient because of it, fast, be easy to realize, reliable etc. that characteristics obtain increasing concern.The sorbent material of researching and developing pollutents such as efficient, cheap nitrogen, phosphorus is one of focus of present field of environment engineering research.
Red mud is an a kind of red mud shape high alkalinity solid waste residual in the alumina producing industry.Wherein red mud from sintering process mainly is to produce to the not high low grade ore of aluminium content, and output is bigger at home.Because the quality of ore is lower, the red mud from sintering process amount that one ton of aluminum oxide of every production produces is bigger, is about the 1.0-1.3 ton.In recent years, along with the high speed development of Aluminum, the annual nearly 2,000 ten thousand tons of red muds of China emit.On the one hand, stacking naturally of a large amount of red muds taken a large amount of soils, and its strong basicity, high salt be to soil, the face of land and underground water, and the Air quality of locality has all caused serious pollution.On the other hand; Red mud from sintering process is except containing a large amount of calcium, aluminium, iron, silicon isoreactivity MOX; Higher loss on ignition in production process, and hydration mineral and carbonate minerals etc. at high temperature decompose the moisture that discharges or the material of gas, make it form vesicular structure.These characteristics make red mud from sintering process become a kind of feasible sorbent material.Existing both at home and abroad research shows that red mud has certain absorption and removal effect to phosphor in sewage, and through s.t., thermal treatment, can change the absorption property that red mud is inhaled with several method such as allogenic material mixed sintering.Wherein, S.t. is owing to less energy intensive, remarkably productive receiving much concern; But the examination about conditions such as adsorption medium pH value, adsorption density, sorbent material consumption in the s.t. process is still waiting research, and sour in addition modification red mud from sintering process is removed synchronously nitrogen phosphorus in nitrogen removal and the river in the sewage and do not appeared in the newspapers yet so far.
Summary of the invention
The present invention is to be basic raw material with the red mud from sintering process that produces in the aluminum oxide production process, handles through sour modification, prepares efficient, inexpensive denitrogenation dephosphorizing sorbent material.Particular content is: use the hcl acidifying red mud from sintering process, can reduce the alkalescence of material on the one hand, the specific surface area of material is increased, improve its removal ability to nitrogen, phosphorus.
Major technique of the present invention thes contents are as follows.
(1) a kind of preparation method of changed red mud
With sintering process mud oven dry, to grind 100 mesh sieves subsequent use; Compound concentration is the hydrochloric acid soln of 0.5 mol/L; The solid-to-liquid ratio of pressing 1:20 stirs 0.5 h with red mud from sintering process and mixed in hydrochloric acid down at 25 ℃; After using flushing with clean water to suspension-s as neutrality, centrifugal, dry to constant weight, cross 100 mesh sieves, promptly get the modification red mud from sintering process, its staple is SiO
2, Fe
2O
3, CaO, Al
2O
3, main crystalline structure is rhombohedral iron ore and calcite, specific surface area is 129.5 m
2/ g, porosity is 0.231 cc/g, the aperture is 2.437 nm.
(2) denitrogenate method of use
Get the nitrogen-containing wastewater of certain volume concentration, regulate water sample pH to 5.0, drop in the waste water by the dosage of modification red mud from sintering process 10 g/L, shake 1 h after, nitrogen content in the water is measured in centrifuging.
(3) dephosphorization method of use
That gets certain volume concentration contains orthophosphoric acid salt waste water, regulates water sample pH to 2.0, drops in the waste water by modification red mud from sintering process 5 g/L dosages, shake 4 h after, phosphorus content in the water is measured in centrifuging.
(4) remove the method for use of nitrogen phosphorus in the river synchronously
Get a certain amount of river,, add the modification red mud from sintering process according to 10 g/L dosages, shake 4 h after, nitrogenous, phosphorus amount in the water is measured in centrifuging.
The raw material red mud from sintering process that the present invention adopted is drawn materials conveniently, price is low, and the preparation method is simple to operate, has good economic worth.In addition, the material alkalescence after the modification reduces, and the pH after the absorption is closely neutral, has reduced the program of subsequent disposal.Nitrogen, phosphorus that this sorbent material can be widely used in trade effluent and the exhausting sewage are removed.
Description of drawings
The modification red mud from sintering process is to the removal effect figure of nitrogen under the initial pH of the different water samples of Fig. 1.
The modification red mud from sintering process is to the removal effect figure of phosphorus under the initial pH of the different water samples of Fig. 2.
Embodiment
The present invention carries out in the laboratory, below by embodiment to the detailed description of the invention.
Embodiment 1 modification red mud from sintering process efficiencies of nitrogen removal
Get 50 mL and contain ammonia nitrogen 20 mg/L, pH is 5.0 pending water sample, adds modification red mud from sintering process 0.5 g; At 25 ℃, 180 r/min are concussion 1 h down, the centrifuging and taking supernatant; Using nessler reagent colorimetric method for determining ammonia nitrogen concentration is 6.75 mg/L; Ammonia nitrogen removal frank is 66.5%, and the ammonia nitrogen absorption amount is 1.34 mg/g, and handling back water sample pH is 7.9.
Get 40 mL and contain positive phosphorus acid ion 30 mg/L, pH is 2.0 pending water sample, adds modification red mud from sintering process 0.2 g; At 25 ℃, 180 r/min are concussion 4 h down, the centrifuging and taking supernatant; Using ammonium molybdate colorimetric method for determining ortho-phosphoric acid root concentration is 0.09 mg/L; Ortho-phosphoric acid root clearance is 99.7%, and ortho-phosphoric acid root adsorptive capacity is 5.96 mg/g, and handling back water sample pH is 4.9.
Embodiment 3 application of modification red mud from sintering process in actual waste water
The actual waste water that is adopted in the present embodiment is taken from inner and outer city walls river, Tengzhou City, Shandong Province, and ammonia nitrogen concentration is 4.55 mg/L in the water sample, and ortho-phosphoric acid root concentration is 0.48 mg/L, and water sample pH is 7.8; Get 0.5 g modification red mud from sintering process and be added in the 50 mL rivers, at 25 ℃, 180 r/min are concussion 4 h down; The centrifuging and taking supernatant; Measuring ammonia nitrogen concentration is 2.17 mg/L, and ortho-phosphoric acid root concentration is 0 mg/L, and ammonia nitrogen removal frank is 52.2%; Ortho-phosphoric acid root clearance is 100 %, and handling back water sample pH is 7.5.
Claims (1)
1. a modification red mud from sintering process is removed the method for nitrogen phosphorus in the sewage, and it is characterized in that: with the red mud from sintering process that produces in the aluminum oxide production process is raw material, adopts s.t. to make changed red mud; Realize to remove the purpose of nitrogen, phosphorus in the sewage, wherein modification red mud from sintering process preparation method does, the sintering red mud is added in the hydrochloric acid soln of 0.5 mol/L with the solid-to-liquid ratio of 1:20; Stir 0.5 h down at 25 ℃; Use clear water to wash to suspension-s and be neutrality, centrifugal, dry to constant weight, ground 100 mesh sieves; Promptly get the modification red mud from sintering process, its staple is SiO
2, Fe
2O
3, CaO, Al
2O
3, main crystalline structure is rhombohedral iron ore and calcite, specific surface area is 129.5 m
2/ g, porosity is 0.231 cc/g, the aperture is 2.437 nm; When handling nitric wastewater, get 50 mL and contain ammonia nitrogen 20 mg/L, pH is 5.0 pending water sample; Add modification red mud from sintering process 0.5 g, at 25 ℃, 180 r/min are concussion 1 h down; The centrifuging and taking supernatant, using nessler reagent colorimetric method for determining ammonia nitrogen concentration is 6.75 mg/L, ammonia nitrogen removal frank is 66.5%; The ammonia nitrogen absorption amount is 1.34 mg/g, and handling back water sample pH is 7.9; When handling phosphorus-containing wastewater, get 40 mL and contain positive phosphorus acid ion 30 mg/L, pH is 2.0 pending water sample; Add modification red mud from sintering process 0.2 g, at 25 ℃, 180 r/min are concussion 4 h down; The centrifuging and taking supernatant, using ammonium molybdate colorimetric method for determining ortho-phosphoric acid root concentration is 0.09 mg/L, ortho-phosphoric acid root clearance is 99.7%; Ortho-phosphoric acid root adsorptive capacity is 5.96 mg/g, and handling back water sample pH is 4.9; When handling the actual waste water of nitrogenous phosphorus of while, get inner and outer city walls river, Tengzhou City, Shandong Province river, ammonia nitrogen concentration is 4.55 mg/L in the water sample, ortho-phosphoric acid root concentration is 0.48 mg/L; Water sample pH is 7.8, gets 0.5 g modification red mud from sintering process and is added in the 50 mL rivers, and at 25 ℃, 180 r/min are concussion 4 h down; The centrifuging and taking supernatant, measuring ammonia nitrogen concentration is 2.17 mg/L, ortho-phosphoric acid root concentration is 0 mg/L; Ammonia nitrogen removal frank is 52.2%, and ortho-phosphoric acid root clearance is 100%, and handling back water sample pH is 7.5.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253727A (en) * | 2013-04-28 | 2013-08-21 | 重庆科技学院 | Method for deeply purifying phosphorus wastewater through utilizing high-phosphorus iron ores |
| CN103537270A (en) * | 2013-09-09 | 2014-01-29 | 西安建筑科技大学 | Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation |
| CN104549173A (en) * | 2015-02-06 | 2015-04-29 | 中国环境科学研究院 | Preparation method and application of phosphorus-adsorbing material used in sewage |
| CN104888686A (en) * | 2015-06-26 | 2015-09-09 | 湖南大学 | Particle red-mud adsorbent preparing method used for phosphate adsorption |
| CN106111051A (en) * | 2016-07-01 | 2016-11-16 | 黑龙江大学 | A kind of red mud extracts ferrum, aluminum for the method for adsorbent and application |
| CN108499547A (en) * | 2018-05-23 | 2018-09-07 | 常州清流环保科技有限公司 | A kind of adsorbent and its methods and applications prepared using polyaluminium chloride lime scum |
| CN109126691A (en) * | 2018-10-31 | 2019-01-04 | 南京信息工程大学 | A kind of modification calcite and preparation method thereof for tetracycline in purified water |
| CN110496591A (en) * | 2019-08-23 | 2019-11-26 | 河南长兴实业有限公司 | A kind of red mud preparation method of extra specific surface area |
| CN110653247A (en) * | 2019-09-30 | 2020-01-07 | 中国矿业大学 | Soil phosphorus condition improvement method based on red mud-based composite solid waste material recycling |
| CN113020242A (en) * | 2021-03-11 | 2021-06-25 | 中铝环保生态技术(湖南)有限公司 | Fluorine-contaminated soil remediation agent and laboratory application method |
| CN113651652A (en) * | 2021-09-15 | 2021-11-16 | 西南交通大学 | Preparation of red mud-based slow release fertilizer and method for synchronously recycling nitrogen and phosphorus in wastewater |
| CN114405484A (en) * | 2022-01-07 | 2022-04-29 | 中国地质大学（北京） | Magnetically separable modified red mud adsorbent and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1038254A (en) * | 1973-11-16 | 1978-09-12 | Alcan Research And Development Limited | Composition for treatment of waste waters and process for making same |
| CN1981921A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | High-activity mud adsorbent and its production |
| CN102489245A (en) * | 2011-12-08 | 2012-06-13 | 环境保护部华南环境科学研究所 | Modified pumice absorbing material and preparation method as well as application thereof |
-
2012
- 2012-07-17 CN CN201210247140XA patent/CN102730784A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1038254A (en) * | 1973-11-16 | 1978-09-12 | Alcan Research And Development Limited | Composition for treatment of waste waters and process for making same |
| CN1981921A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | High-activity mud adsorbent and its production |
| CN102489245A (en) * | 2011-12-08 | 2012-06-13 | 环境保护部华南环境科学研究所 | Modified pumice absorbing material and preparation method as well as application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴文思: "赤泥吸附除磷的性能及机制研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, no. 9, 15 September 2011 (2011-09-15) * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253727A (en) * | 2013-04-28 | 2013-08-21 | 重庆科技学院 | Method for deeply purifying phosphorus wastewater through utilizing high-phosphorus iron ores |
| CN103253727B (en) * | 2013-04-28 | 2015-09-16 | 重庆科技学院 | A kind of method of high-phosphorus iron ore mine tailing deep purifying Removal of Phosphorus in Wastewater |
| CN103537270A (en) * | 2013-09-09 | 2014-01-29 | 西安建筑科技大学 | Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation |
| CN104549173A (en) * | 2015-02-06 | 2015-04-29 | 中国环境科学研究院 | Preparation method and application of phosphorus-adsorbing material used in sewage |
| CN104888686A (en) * | 2015-06-26 | 2015-09-09 | 湖南大学 | Particle red-mud adsorbent preparing method used for phosphate adsorption |
| CN106111051A (en) * | 2016-07-01 | 2016-11-16 | 黑龙江大学 | A kind of red mud extracts ferrum, aluminum for the method for adsorbent and application |
| CN106111051B (en) * | 2016-07-01 | 2018-11-27 | 黑龙江大学 | Iron, aluminum are extracted in a kind of red mud for the method and application of adsorbent |
| CN108499547A (en) * | 2018-05-23 | 2018-09-07 | 常州清流环保科技有限公司 | A kind of adsorbent and its methods and applications prepared using polyaluminium chloride lime scum |
| CN109126691A (en) * | 2018-10-31 | 2019-01-04 | 南京信息工程大学 | A kind of modification calcite and preparation method thereof for tetracycline in purified water |
| CN109126691B (en) * | 2018-10-31 | 2021-07-13 | 南京信息工程大学 | Modified calcite for purifying tetracycline in water and preparation method thereof |
| CN110496591A (en) * | 2019-08-23 | 2019-11-26 | 河南长兴实业有限公司 | A kind of red mud preparation method of extra specific surface area |
| CN110653247A (en) * | 2019-09-30 | 2020-01-07 | 中国矿业大学 | Soil phosphorus condition improvement method based on red mud-based composite solid waste material recycling |
| CN110653247B (en) * | 2019-09-30 | 2021-11-19 | 中国矿业大学 | Soil phosphorus condition improvement method based on red mud-based composite solid waste material recycling |
| CN113020242A (en) * | 2021-03-11 | 2021-06-25 | 中铝环保生态技术(湖南)有限公司 | Fluorine-contaminated soil remediation agent and laboratory application method |
| CN113651652A (en) * | 2021-09-15 | 2021-11-16 | 西南交通大学 | Preparation of red mud-based slow release fertilizer and method for synchronously recycling nitrogen and phosphorus in wastewater |
| CN114405484A (en) * | 2022-01-07 | 2022-04-29 | 中国地质大学（北京） | Magnetically separable modified red mud adsorbent and application thereof |
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Application publication date: 20121017 |