CN1094070C - Ferri-rareearth element compound water treatment adsorbent and preparation process thereof - Google Patents
Ferri-rareearth element compound water treatment adsorbent and preparation process thereof Download PDFInfo
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- CN1094070C CN1094070C CN99119712A CN99119712A CN1094070C CN 1094070 C CN1094070 C CN 1094070C CN 99119712 A CN99119712 A CN 99119712A CN 99119712 A CN99119712 A CN 99119712A CN 1094070 C CN1094070 C CN 1094070C
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- rare earth
- earth element
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- Water Treatment By Sorption (AREA)
Abstract
本发明属于水处理技术领域，是由2价、3价铁盐(如氯化亚铁、氯化铁或硫酸亚铁硫酸铁等)，和稀土元素盐类(如铈盐、镧盐等)在碱性条件下反应合成。可用于吸附去除水中的磷、砷等有害元素。该复合吸附剂对磷和砷的吸附量分别为传统活性氧化铝的8倍和7倍以上，并且吸附速度明显加快，吸附量受pH变化的影响小。本发明物具有吸附剂用量少、操作周期长、处理装置容积小、适宜pH范围广等优点。The invention belongs to the technical field of water treatment, and is composed of divalent and trivalent iron salts (such as ferrous chloride, ferric chloride or ferrous sulfate, ferric sulfate, etc.), and rare earth element salts (such as cerium salts, lanthanum salts, etc.) Reaction synthesis under alkaline conditions. It can be used to adsorb and remove harmful elements such as phosphorus and arsenic in water. The adsorption capacity of the composite adsorbent for phosphorus and arsenic is more than 8 times and 7 times that of traditional activated alumina respectively, and the adsorption speed is obviously accelerated, and the adsorption capacity is less affected by pH changes. The product of the invention has the advantages of less amount of adsorbent, long operation period, small volume of treatment device, wide suitable pH range and the like.
Description
Technical field
The invention belongs to water-treatment technology field, particularly remove the compound water treatment adsorbent of harmful elements such as phosphorus, arsenic in the water.
Background technology
Phosphorus, arsenic are the harmful elements in sewage or the tap water.Adopt absorption method to its adsorb remove have simple to operate, be convenient to reclaim advantages such as useful resources, sorbent material can be recycled.The sorbent material that uses mainly comprises activated alumina, natural materials (as red soil, flying dust etc.) and synthetic sorbent material.And a common weak point of the sorbent material of known natural and simple modification is that adsorptive capacity is all on the low side, so synthetic exploitation high-performance water treatment absorbent more and more comes into one's own.
Summary of the invention
The objective of the invention is for overcoming the weak point of prior art, a kind of iron-rare earth element compound water treatment adsorbent is proposed, make by the combination plurality of inorganic salt, it is simple to have preparation, the sorbent material consumption is few, the operational cycle long, the treatment unit volume is little, the appropriate pH scope is wide, advantages such as energy desorb, regeneration.
The present invention proposes a kind of iron-rare earth element compound water treatment adsorbent, it is characterized in that, by divalent, 3 valency molysite, form with the rare earth element salt, the molar percentage scope of three class salt is: 3 valency molysite 40-60%, divalent molysite 20-35%, rare earth element 15-35%.
Said divalent molysite can be iron protochloride or ferrous sulfate etc.
Said 3 valency molysite can be iron(ic) chloride or ferric sulfate etc.
Said rare earth element salt can be cerium salt, lanthanum salt etc.
The present invention proposes a kind of method for preparing above-mentioned iron-rare earth element compound water treatment adsorbent, it is characterized in that, with divalent, 3 valency molysite, with the rare earth element salt be raw material, under normal temperature condition, the pH value is reacted in the 7-11 basic solution, generates a kind of throw out, through deionized water wash, make after the drying.
The compound water treatment adsorbent that makes in order to the top method is applied to phosphorus-containing wastewater or contains in the arsenic drinking water treatment, compare with activated alumina adsorbents commonly used, the phosphorus under differing temps and condition of different pH or the adsorptive capacity of arsenic all are significantly increased, rate of adsorption is obviously accelerated, and the influence that adsorptive capacity is changed by pH is little.This means that the present invention has advantages such as the sorbent material consumption is few, the operational cycle long, the treatment unit volume is little, the appropriate pH scope is wide.
Specific embodiments
Embodiment 1
Adopt Ce (SO
4)
2As rare-earth element salt, FeCl
2And FeCl
3Be divalent, 3 valency molysite, prepare this three kinds of salt mixed aqueous solutions, make three kinds of salt volumetric molar concentrations be respectively 0.08M, 0.1M, 0.2M.This aqueous solution is under 25 ℃ of temperature, and the NaOH aqueous solution titration of using 1M is to pH=9.5, and the constant temperature stirring reaction made sorbent material about 30 minutes behind the filtration drying.
The sorbent material of synthetic gained is used for adsorbing the phosphorus of phosphorus-containing wastewater.In temperature is to carry out adsorption experiment under the condition that 25 ℃, initial pH are 5, initial phosphorus concentration is 50mg/L.Phosphorus concentration when adsorption equilibrium is under the condition of 15mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 47.39mg-P/g-sorbent material, for the control group activated alumina at more than 8 times of the adsorptive capacity 5.69mg-P/g under the similarity condition.
The synthetic sorbent material that makes is used for processing and contains the arsenic tap water.In temperature is 20 ℃, and initial pH is 5.5, carries out adsorption test under the condition that initial arsenic concentration is 1mg/L.When the arsenic concentration when adsorption equilibrium was 0.15mg/L, sorbent material reached 21.7mg/L to the quantity of sorbent of arsenic, for the control group activated alumina at 7 times with the arsenic adsorptive capacity 3.1mg/L under the condition.
Embodiment 2
Get CeCl
4, FeSO
4, Fe
2(SO
4)
3Three kinds of salt, the preparation mixed aqueous solution makes volumetric molar concentration be respectively 0.1M, 0.1M, 0.2M.Under 20 ℃ of temperature, the KOH solution titration of using 1M makes sorbent material to pH=9.0 by embodiment 1 method.With phosphorus in this adsorbents adsorb waste water, be to carry out adsorption experiment under the condition that 25 ℃, initial pH are 5.8, initial phosphorus concentration is 50mg/L in temperature.Phosphorus concentration when adsorption equilibrium is under the condition of 15mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 35.0mg-P/g-sorbent material.
Embodiment 3
Three kinds of salts solution volumetric molar concentrations of getting embodiment 1 are respectively 0.05M, 0.1M, 0.2M, the sorbent material that makes with embodiment 1 method.This sorbent material is used for adsorbing waste water phosphorus, is to carry out adsorption experiment under the condition that 35 ℃, initial pH are 5.0, initial phosphorus concentration is 50mg/L in temperature.Phosphorus concentration when adsorption equilibrium is under the condition of 26.5mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 23.0mg-P/g-sorbent material.
Embodiment 4
Three kinds of salts solution volumetric molar concentrations of getting embodiment 2 are respectively 0.15M, 0.1M, 0.2M, the sorbent material that makes with embodiment 2 methods.This sorbent material is used for adsorbing waste water phosphorus, is to carry out adsorption experiment under the condition that 35 ℃, initial pH are 4.0, initial phosphorus concentration is 50mg/L in temperature.Phosphorus concentration when adsorption equilibrium is under the condition of 27.5mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 21.9mg-P/g-sorbent material.
Claims (5)
1, a kind of iron-rare earth element compound water treatment adsorbent is characterized in that, is made up of divalent, 3 valency molysite and rare earth element salt, and the molar percentage scope of this three classes salt is: 3 valency molysite 40-60%, divalent molysite 20-35%, rare earth element 15-35%.
2, iron as claimed in claim 1-rare earth element compound water treatment adsorbent is characterized in that, said divalent molysite is iron protochloride or ferrous sulfate.
3, iron as claimed in claim 1-rare earth element compound water treatment adsorbent is characterized in that, said 3 valency molysite are iron(ic) chloride or ferric sulfate.
4, iron as claimed in claim 1-rare earth element compound water treatment adsorbent is characterized in that, said rare earth element salt is cerium salt, lanthanum salt.
5, a kind of method for preparing iron-rare earth element compound water treatment adsorbent is characterized in that, with divalent, 3 valency molysite, with the rare earth element salt be raw material, under normal temperature condition, the pH value is for reacting in the 7-11 basic solution, generate a kind of throw out,, make after the drying through deionized water wash.
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| CN99119712A CN1094070C (en) | 1999-09-29 | 1999-09-29 | Ferri-rareearth element compound water treatment adsorbent and preparation process thereof |
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| CN99119712A CN1094070C (en) | 1999-09-29 | 1999-09-29 | Ferri-rareearth element compound water treatment adsorbent and preparation process thereof |
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| CN1248486A CN1248486A (en) | 2000-03-29 |
| CN1094070C true CN1094070C (en) | 2002-11-13 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404085C (en) * | 2004-05-12 | 2008-07-23 | 上海洁申实业有限公司 | Harmless treatment method for arsenic contained rejectamenta |
| CN100366337C (en) * | 2005-09-29 | 2008-02-06 | 上海交通大学 | Preparation method of adsorbent with functions of phosphorus enrichment and phosphorus recovery |
| CN101274264B (en) * | 2007-03-28 | 2010-12-01 | 郭华明 | Preparation of composite adsorbing agent for effectively removing arsenic and method for using the same |
| CN101648130B (en) * | 2009-06-02 | 2012-10-24 | 清华大学 | Preparing method of titanium-rare earth composite adsorbent capable of efficiently removing arsenic |
| 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 |
| CN102085473A (en) * | 2010-12-17 | 2011-06-08 | 合肥工业大学 | Application of iron sulphide ores and method for adsorbing trace phosphor in water by using iron sulphide ores |
| CN102553533A (en) * | 2012-03-27 | 2012-07-11 | 上海大学 | Method for preparing composite dephosphorus adsorbent by virtue of activated carbon fiber loaded with metal |
| MX370462B (en) | 2014-03-07 | 2019-12-13 | Secure Natural Resources Llc | Cerium (iv) oxide with exceptional arsenic removal properties. |
| CN107051371B (en) * | 2017-06-14 | 2019-12-13 | 芜湖格丰环保科技研究院有限公司 | Renewable adsorption material for deep phosphorus removal of water body, preparation method and application thereof |
| CN109603785A (en) * | 2018-12-18 | 2019-04-12 | 安徽工业大学 | A kind of adsorbent for simultaneously removing arsenic and phosphorus in water and preparation method thereof |
| CN111135786B (en) * | 2020-01-09 | 2021-09-28 | 常熟理工学院 | Cerium-iron-trivalent arsenic adsorbent and preparation method and application thereof |
| CN112221461B (en) * | 2020-10-16 | 2023-12-26 | 包头中科万成环保科技有限公司 | Phosphorus adsorption material and preparation method thereof |
| CN115672294B (en) * | 2022-10-27 | 2024-06-04 | 江西鑫泰功能材料科技有限公司 | Arsenic removal adsorbent and preparation method thereof |
| CN115722199B (en) * | 2022-11-08 | 2024-03-29 | 中国科学院上海高等研究院 | A rare earth yttrium-based magnetic adsorption material for removing organic phosphine from water, preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5645730A (en) * | 1995-02-21 | 1997-07-08 | Envirocorp Services & Technology, Inc. | Acid wastewater treatement |
| US5866014A (en) * | 1994-12-08 | 1999-02-02 | Santina; Peter F. | Method for removing toxic substances in water |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5866014A (en) * | 1994-12-08 | 1999-02-02 | Santina; Peter F. | Method for removing toxic substances in water |
| US5645730A (en) * | 1995-02-21 | 1997-07-08 | Envirocorp Services & Technology, Inc. | Acid wastewater treatement |
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