CN112588256A - 一种磁性纳米双金属氧化物吸附剂及其应用 - Google Patents
一种磁性纳米双金属氧化物吸附剂及其应用 Download PDFInfo
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- 239000004098 Tetracycline Substances 0.000 claims abstract description 26
- 229960002180 tetracycline Drugs 0.000 claims abstract description 26
- 229930101283 tetracycline Natural products 0.000 claims abstract description 26
- 235000019364 tetracycline Nutrition 0.000 claims abstract description 26
- 150000003522 tetracyclines Chemical class 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract description 8
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract description 5
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- 229940072172 tetracycline antibiotic Drugs 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
一种磁性纳米双金属氧化物吸附剂及其应用，所述磁性纳米双金属氧化物Fe3O4/Co3O4吸附剂，对于水中四环素具有高亲和性和吸附选择性，吸附适宜pH为8~9，对于高浓度含四环素废水中四环素的去除率能达90%以上。本发明通过将磁性纳米双金属氧化物应用于含四环素废水的吸附处理，能有效去除废水中的四环素，从而为处理含四环素废水提供了一种高效吸附剂和吸附去除四环素方法，这在含四环素废水的净化处理和环境保护方面具有很高的社会价值和研究价值。
Description
技术领域
本发明涉及一种磁性纳米双金属氧化物吸附剂及其应用，属水处理技术领域。
背景技术
抗生素是由微生物代谢活动产生的一种具有抗病原体或其他活性且能干扰其他细胞发育的一类化合物，一经问世，就被广泛用于人或动物的疾病治疗，其中，生产和使用比例较大的就是四环素类抗生素。四环素具有极强的水溶性且化学结构稳定，容易在水环境中蓄积。目前，地表水、地下水、饮用水、土壤及污水处理厂出水多次被检测到四环素残留（浓度级别为ng/L～μg/L）。四环素蓄积于人体骨骼内可以影响人体发育；与牙齿中的钙结合形成黄色钙化物，即所谓的“四环素牙”；同时会严重损害人体的肝肾功能；另有研究表明，长期接触四环素可能致癌；并且含有抗生素的废水经过氯化处理后会产生致癌的消毒副产物，严重影响饮用水安全。
Fe3O4纳米颗粒具有稳定的化学性质，可将其粒径减小至纳米级，具有高催化活性、良好的磁响应性和吸附性，是一种优异的吸附材料；大部分的研究都是强调了Fe3O4对重金属离子的去除，而忽略了其对四环素类抗生素也有较好的去除效果。
发明内容
本发明的目的是，为了解决含抗生素废水的处理问题，本发明提出一种磁性纳米双金属氧化物吸附剂及其应用。
本发明实现的技术方案如下，一种磁性纳米双金属氧化物吸附剂及其应用，
所述吸附剂制备方法如下：
（1）准确称取1.0099925g Fe(NO3)3•9H2O和1.455g Co(NO3)2•6H2O（摩尔比Fe3+/Co2 +=1:2）溶解于50ml去离子水中。
（2）使用磁力搅拌器在持续搅拌的条件下使用1mol/L的NaOH溶液调节混合溶液的pH至11。
（3）在300 r/min的转速下持续搅拌2小时。
（4）抽滤，并将获得的固体沉淀物使用去离子水洗涤至中性。
（5）105℃烘干，研磨过100目筛网，获得磁性纳米双金属氧化物吸附剂。
所述吸附剂用于吸附去除水中四环素；所述吸附剂吸附去除水中四环素适宜pH值为8~9；废水中共存阴离子对吸附四环素的影响顺序为CO3 2—> C2O4 2—>NO3 —>Cl—。
本发明的有益效果是，本发明制备的磁性纳米双金属氧化物Fe3O4/Co3O4，对水中四环素具有很好的吸附效果，将该吸附剂用于处理含四环素废水，能够很好地解决含四环素废水对环境的污染问题，具有显著的社会价值和研究价值。
具体实施方式
实施例1
准确称取1.0099925g Fe(NO3)3•9H2O和1.455g Co(NO3)2•6H2O（摩尔比Fe3+/Co2+=1:2）溶解于50ml去离子水中，并持续搅拌；同时缓慢向混合溶液中滴加1.0mol/L的NaOH溶液，直至混合溶液pH达到11左右且基本保持不变；匀速搅拌2h，将固体沉淀物抽滤洗涤至中性；105℃烘干，研磨过100目筛网得到Fe3O4/Co3O4。
取浓度为28mg/L的含四环素模拟废水50ml放入具塞锥形瓶中，pH调为9，加入Fe3O4/Co3O4 0.07g；在25℃、180r/min磁力搅拌器中搅拌16h，吸附后上清液用0.22µm的针管滤头过滤，计算出去除率为92.7%。
实施例2
操作方法同实施例1。
取28mg/L的含四环素模拟废水50ml放入具塞锥形瓶中，Cl—、NO3 —、 C2O4 2—、CO3 2—离子浓度分别在5mmol/L、50mmol/L时，溶液pH调为9，再分别加入Fe3O4/Co3O4 0.05g (1g/L)，在25℃、180r/min磁力搅拌器中搅拌16h，吸附后上清液用0.22µm的针管虑头过滤，计算出不同浓度阴离子共存的条件下去除率分别为Cl—：72%，85.7%；NO3 —：70.6%，81.5%；C2O4 2—：60%，70.8%；CO3 2—：50.2%，62.3%。得出共存阴离子对吸附四环素的影响顺序为CO3 2—> C2O4 2—>NO3 —>Cl—。
Claims (2)
1.一种磁性纳米双金属氧化物吸附剂，其特征在于，所述吸附剂制备方法如下：
（1）准确称取1.0099925g Fe(NO3)3•9H2O和1.455g Co(NO3)2•6H2O（摩尔比Fe3+/Co2+=1:2）溶解于50ml去离子水中；
（2）使用磁力搅拌器在持续搅拌的条件下使用1mol/L的NaOH溶液调节混合溶液的pH至11；
（3）在300 r/min的转速下持续搅拌2小时；
（4）抽滤，并将获得的固体沉淀物使用去离子水洗涤至中性；
（5）105℃烘干，研磨过100目筛网，获得磁性纳米双金属氧化物吸附剂。
2.根据权利要求1所述一种磁性纳米双金属氧化物吸附剂，其特征在于，所述吸附剂用于吸附去除水中四环素；所述吸附剂吸附去除水中四环素适宜pH值为8~9；废水中共存阴离子对吸附四环素的影响顺序为CO3 2—> C2O4 2—>NO3 —>Cl—。
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