中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > Fe_3O_4磁性纳米颗粒外包腐植酸用于有效去除水中重金属 腐植酸 2015 (4) 30-36
Position: Home > Articles > Coating Fe_3O_4 Magnetic Nanoparticles with Humic Acid for High Effi cient Removal of Heavy Metals in Water Humic Acid 2015 (4) 30-36

Fe_3O_4磁性纳米颗粒外包腐植酸用于有效去除水中重金属

作  者：
Liu Jingfu;Zhao Zongshan;Jiang Guibin;任翠领
单  位：
兰州大学化学化工学院;中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室
关键词：
腐植酸;Fe3O4;磁性纳米颗粒;去除;重金属
摘  要：
本研究合成了腐植酸(HA)包裹的Fe3O4纳米颗粒(Fe3O4/HA)并将其用于去除水中的重金属离子,包括Hg(I)、Pb(I)、Cd(I)和Cu(I)。以价格低廉、环境友好的铁盐和腐植酸为原料,通过共沉淀方法制备Fe3O4/HA。TOC和XPS的分析结果表明所制备的Fe3O4/HA中约含有11%(w/w)的叶酸,它是含O和N-官能团丰富的组分。TEM成像和激光颗粒尺寸分析证实所制备的Fe3O4/HA(Fe3O4内核约为10 nm)在水溶液中团聚并形成了平均水和半径约为140 nm的聚集体,饱和磁化强度为79.6 emu/g,这种Fe3O4/HA材料在低磁场梯度下几分钟内就可以从水溶液中分离。Fe3O4/HA对重金属离子的吸附在15分钟内就可以达到平衡,其吸附行为符合朗格缪尔吸附模型,且最大吸附容量在46.3~97.7 mg/g范围内。制备的Fe3O4/HA在自来水、天然水、0.1 M HCl和2 M Na OH的酸/碱溶液中都很稳定,Fe(≤3.7%)和HA(≤5.3%)的泄漏率很低。在最优条件下,Fe3O4/HA纳米材料能够去除天然水和自来水中超过99%的Hg(II)和Pb(II)以及超过95%的Cu(II)和Cd(II)。Fe3O4/HA吸附的重金属离子泄露回水溶液的量几乎可以忽略。
译  名：
Coating Fe_3O_4 Magnetic Nanoparticles with Humic Acid for High Effi cient Removal of Heavy Metals in Water
作  者：
Liu Jingfu;Zhao Zongshan;Jiang Guibin;Ren Cuiling;State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences;College of Chemistry and Chemical Engineering, Lanzhou university;
关键词：
humic acid;;Fe3O4;;magnetic nanoparticles;;removal;;heavy metals
摘  要：
Humic acid(HA) coated Fe3O4 nanoparticles(Fe3O4/HA) were developed for the removal of toxic Hg(II), Pb(II), Cd(II), and Cu(II) from water. Fe3O4/HA were prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TOC and XPS analysis showed the as-prepared Fe3O4/HA contains ~11%(w/w) of HA which are fractions abundant in O and N-based functional groups. TEM images and laser particle size analysis revealed the Fe3O4/HA(with ~10 nm Fe3O4 cores) aggregated in aqueous suspensions to form aggregates with an average hydrodynamic size of ~140 nm. With a saturation magnetization of 79.6 emu/g, the Fe3O4/HA can be simply recovered from water with magnetic separations at low magnetic fi eld gradients within a few minutes. Sorption of the heavy metals to Fe3O4/HA reached equilibrium in less than 15 min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities from 46.3 to 97.7 mg/g. The Fe3O4/HA was stable in tap water, natural waters, and acidic/basic solutions ranging from 0.1 M HCl to 2 M Na OH with low leaching of Fe(≤3.7%) and HA(≤5.3%). The Fe3O4/HA was able to remove over 99% of Hg(II) and Pb(II) and over 95% of Cu(II) and Cd(II) in natural and tap water at optimized p H. Leaching back of the Fe3O4/HA sorbed heavy metals in water was found to be negligible.

相似文章

导出引用
计量
文章访问数: 13
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46