CN1248486A - 铁一稀土元素复合水处理吸附剂及其制备方法 - Google Patents
铁一稀土元素复合水处理吸附剂及其制备方法 Download PDFInfo
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- CN1248486A CN1248486A CN 99119712 CN99119712A CN1248486A CN 1248486 A CN1248486 A CN 1248486A CN 99119712 CN99119712 CN 99119712 CN 99119712 A CN99119712 A CN 99119712A CN 1248486 A CN1248486 A CN 1248486A
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- earth element
- rare earth
- salt
- water treatment
- iron
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003463 adsorbent Substances 0.000 title claims abstract description 15
- 150000001875 compounds Chemical class 0.000 title claims description 11
- 238000002360 preparation method Methods 0.000 title description 4
- 150000003839 salts Chemical class 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 150000002603 lanthanum Chemical class 0.000 claims abstract description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical class Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000003637 basic solution Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical group [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 21
- 239000011574 phosphorus Substances 0.000 abstract description 21
- 238000001179 sorption measurement Methods 0.000 abstract description 14
- 229910052785 arsenic Inorganic materials 0.000 abstract description 11
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 150000000703 Cerium Chemical class 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 3
- 150000003841 chloride salts Chemical class 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 239000002594 sorbent Substances 0.000 description 24
- 230000000274 adsorptive effect Effects 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- DJFBJKSMACBYBD-UHFFFAOYSA-N phosphane;hydrate Chemical compound O.P DJFBJKSMACBYBD-UHFFFAOYSA-N 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- 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。
Description
本发明属于水处理技术领域,特别涉及去除水中磷、砷等有害元素的一类铁-稀土元素复合水处理吸附剂。
磷、砷是污水或饮用水中的有害元素。采用吸附法对其进行吸附去除具有操作简单、便于回收有用资源、吸附剂可循环使用等优点。使用的吸附剂主要包括活性氧化铝、天然材料(如红壤、飞灰等)及人工合成吸附剂。而已知的天然和简单改性的吸附剂的一个共同不足之处是吸附量均偏低,因此人工合成开发高性能水处理吸附剂越来越受到重视。
本发明的目的是为克服已有技术的不足之处,提出一种铁-稀土元素复合水处理吸附剂,通过组合多种无机盐制成,具有制备简单,吸附剂用量少、操作周期长、处理装置容积小、适宜pH范围广,能解吸、再生等优点。
本发明提出一种铁-稀土元素复合水处理吸附剂,其特征在于,由2价、3价铁盐,和稀土元素盐类组成,三类盐的摩尔百分比范围为:3价铁盐40-60%,2价铁盐20-35%,稀土元素15-35%。
所说的2价、3价铁盐可为氯化亚铁、氯化铁或硫酸亚铁、硫酸铁等。
所说的稀土元素盐类可为铈盐、镧盐等。
本发明提出一种制备上述铁-稀土元素复合水处理吸附剂的方法,其特征在于,以2价、3价铁盐,和稀土元素盐类为原料,在常温条件下,pH值为7-11碱性溶液中反应,生成一种沉淀物,经去离子水洗涤,干燥后制得。
用以上方法制得的复合水处理吸附剂应用于含磷污水或含砷饮用水处理中,与常用的活性氧化铝吸附剂相比,在不同温度和不同pH条件下的磷或砷的吸附量均有明显增加,吸附速度明显加快,且吸附量受pH变化的影响小。这意味着本发明具有吸附剂用量少、操作周期长、处理装置容积小、适宜pH范围广等优点。
实施例1
采用Ce(SO4)2作为稀土元素盐,FeCl2和FeCl3为2价、3价铁盐,制备这三种盐混合水溶液,使三种盐摩尔浓度分别为0.08M、0.1M、0.2M。该水溶液在温度25℃下,用1M的NaOH水溶液滴定至pH=9.5,恒温搅拌反应30分钟左右,过滤干燥后制得吸附剂。
合成所得的吸附剂用于吸附含磷废水中的磷。在温度为25℃、初始pH为5、初始磷浓度为50mg/L的条件下进行吸附实验。当吸附平衡时的磷浓度为15mg/L的条件下,测得的吸附剂平衡磷吸附量达47.39mg-P/g-吸附剂,为对照组活性氧化铝在同样条件下的吸附量5.69mg-P/g的8倍以上。
合成制得的吸附剂用于处理含砷饮用水。在温度为20℃,初始pH为5.5,初始砷浓度为1mg/L的条件下进行吸附试验。当吸附平衡时的砷浓度为0.15mg/L时,吸附剂对砷的吸附剂量达21.7mg/L,为对照组活性氧化铝在同条件下的砷吸附量3.1mg/L的7倍。
实施例2
取CeCl4、FeSO4、Fe2(SO4)3三种盐,制备混合水溶液,使摩尔浓度分别为0.1M、0.1M、0.2M。在温度20℃下,用1M的KOH溶液滴定至pH=9.0,按实施例1方法制得吸附剂。用此吸附剂吸附废水中磷,在温度为25℃、初始pH为5.8、初始磷浓度为50mg/L的条件下进行吸附实验。当吸附平衡时的磷浓度为15mg/L的条件下,测得的吸附剂平衡磷吸附量达35.0mg-P/g-吸附剂。
实施例3
取实施例1的三种盐溶液摩尔浓度分别为0.05M、0.1M、0.2M,以实施例1方法制得的吸附剂。此吸附剂用于吸附废水中磷,在温度为35℃、初始pH为5.0、初始磷浓度为50mg/L的条件下进行吸附实验。当吸附平衡时的磷浓度为26.5mg/L的条件下,测得的吸附剂平衡磷吸附量达23.0mg-P/g-吸附剂。
实施例4
取实施例2的三种盐溶液摩尔浓度分别为0.15M、0.1M、0.2M,以实施例2方法制得的吸附剂。此吸附剂用于吸附废水中磷,在温度为35℃、初始pH为4.0、初始磷浓度为50mg/L的条件下进行吸附实验。当吸附平衡时的磷浓度为27.5mg/L的条件下,测得的吸附剂平衡磷吸附量达21.9mg-P/g-吸附剂。
Claims (4)
1、一种铁-稀土元素复合水处理吸附剂,其特征在于,由2价、3价铁盐,和稀土元素盐类组成,该三类盐的摩尔百分比范围为:3价铁盐40-60%,2价铁盐20-35%,稀土元素15-35%。
2、如权利要求1所述的铁-稀土元素复合水处理吸附剂,其特征在于,所说的2价、3价铁盐为氯化亚铁、氯化铁或硫酸亚铁、硫酸铁。
3、如权利要求1所述的铁-稀土元素复合水处理吸附剂,其特征在于,所说的稀土元素盐类为铈盐、镧盐。
4、一种制备铁-稀土元素复合水处理吸附剂的方法,其特征在于,以2价、3价铁盐,和稀土元素盐类为原料,在常温条件下,pH值为7-11碱性溶液中反应,生成一种沉淀物,经去离子水洗涤,干燥后制得。
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CN100366337C (zh) * | 2005-09-29 | 2008-02-06 | 上海交通大学 | 具有磷富集和磷回收功能的吸附剂的制备方法 |
CN100404085C (zh) * | 2004-05-12 | 2008-07-23 | 上海洁申实业有限公司 | 含砷废弃物无害化处理方法 |
CN101274264B (zh) * | 2007-03-28 | 2010-12-01 | 郭华明 | 高效除砷复合吸附剂的制备和应用方法 |
CN102085473A (zh) * | 2010-12-17 | 2011-06-08 | 合肥工业大学 | 一种铁硫化物矿石的用途及用铁硫化物矿石吸附水中微量磷的方法 |
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CN107051371A (zh) * | 2017-06-14 | 2017-08-18 | 芜湖格丰环保科技研究院有限公司 | 一种水体深度除磷的可再生吸附材料、制备方法及其应用 |
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Family Cites Families (2)
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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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CN115722199B (zh) * | 2022-11-08 | 2024-03-29 | 中国科学院上海高等研究院 | 一种用于去除水中有机膦的稀土钇基磁性吸附材料、制备方法及其应用 |
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