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一锅法和两步法合成磁性羟基磷灰石重金属吸附材料的研究 被引量:6

Synthesis of Magnetic HAP for the Enrichment of Heavy Ions by One-pot and Two-step Ways
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摘要 分别采用一锅法和两步法工艺制备了磁性羟基磷灰石复合材料(HAP/Fe3O4复合磁性材料)。通过X射线衍射(XRD)对两种方法合成的HAP/Fe3O4复合磁性材料进行微观结构表征与分析,并研究了HAP/Fe3O4复合磁性材料对Cd2+的吸附性能。结果表明:羟基磷灰石均匀负载在Fe3O4微粒表面,HAP/Fe3O4复合磁性材料对Cd2+的吸附性能比HAP明显提高,且一锅法合成的HAP/Fe3O4复合磁性材料中HAP在Fe3O4表面分布更均匀,更牢固,且比表面积更大,较两步法好,具有更好的磁分离能力。随着Cd2+初始浓度由0. 02 mg/L增大到0. 1 mg/L,去除率均呈下降趋势,吸附量呈上升趋势,当Cd2+初始浓度为0. 1 mg/L时,一锅法制得HAP/Fe3O4复合磁性材料对Cd2+的去除率在90%以上,其吸附量较HAP吸附量提高30%以上,两步法制得HAP/Fe3O4复合磁性材料对Cd2+的去除率在85%以上,其吸附量较HAP吸附量提高了20%以上。HAP/Fe3O4复合磁性材料在外加磁场的作用下具有良好的分离回收和循环利用性能,是一种潜在的重金属高效吸附材料。 Magnetic HAP was synthesized by means of“one-pot”and“two-step ways”.The microstructure of HAP/Fe3O4 was confirmed by X-ray diffraction(XRD).The adsorption properties of HAP/Fe3O4 on Cd2+were also investigated.The results showed that HAP was uniformly loaded on the surface of Fe3O4 particles.The adsorption capacity of Cd2+after HAP/Fe3O4 increased significantly compared with that of HAP.And the HAP/Fe3O4 synthesized by one-pot method was more uniform and firm on the surface of Fe3O4,and the specific surface area was larger,better than the two-step method,and had better magnetic separation ability.With the initial concentration of Cd2+increasing from 0.02 mg/L to 0.1 mg/L,the removal rate of Cd2+decreases and the adsorption capacity increased.When the initial concentration of Cd2+was 0.1 mg/L,the removal rate of Cd2+by the HAP/Fe3O4 synthesized by one-pot method was more than 90%,and the adsorption capacity of HAP/Fe3O4 was more than 30%higher than that of HAP.The removal rate of Cd2+by the HAP/Fe3O4 synthesized by two-step method was over 85%,and its adsorption capacity was more than 20%higher than that of HAP.HAP/Fe3O4 had good separation,recovery and recycling properties under the action of applied magnetic field.It is a potential heavy ions adsorption material with high efficiency.
作者 高卫民 程寒飞 詹茂华 陈志刚 GAO Wei-min;CHENG Han-fei;ZHAN Mao-hua;CHEN Zhi-gang(MCC Nanjing Huatian Engineering&Technology Corporation,Nanjing 210019,China;MCC Huatian Engineering&Technology Corporation,Maanshan 243061,China)
出处 《化学试剂》 CAS 北大核心 2019年第8期784-788,共5页 Chemical Reagents
基金 南京市科技计划项目(201805015) 中华全国总工会职工创新补助资金项目(2017-1203)
关键词 羟基磷灰石 磁性 吸附 一锅法 两步法 hydroxyapatite magnetism adsorption one-pot method two-step method
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