Adsorption Behavior of Hg() on the Hydroxyl-Terminated-Polyamidoamine-Grafted Magnetic Graphene Oxide

doi:10.11896/cldb.201902007

	Adsorption Behavior of Hg() on the Hydroxyl-Terminated-Polyamidoamine-Grafted Magnetic Graphene Oxide
	Ma, Yingxia; Jin, Pengsheng; Shao, Wenjie; Kou, Yalan; La, Peiqing
刊名	Cailiao Daobao/Materials Review
	2019-01-25
卷号	33 期号:1 页码:234-239
关键词	Adsorption isotherms Biochemistry Biodegradability Dendrimers Dyes Fourier transform infrared spectroscopy Grafting (chemical) Graphene Health risks Heavy metals High resolution transmission electron microscopy Kinetics Metal ions Monolayers Pollution Saturation magnetization Thermogravimetric analysis Trace elements X ray photoelectron spectroscopy Chlorohydrin Heavy metal pollution Polyamidoamine dendrimers Polyamidoamines Pseudo second order kinetics Solid liquid separation Thermogravimetry analysis Vibrating sample magnetometer
ISSN号	1005023X
DOI	10.11896/cldb.201902007
英文摘要	In recent years, heavy metal pollution of industrial wastewater has become a serious threat to human health, living resources and ecological systems even at trace concentrations due to their non-biodegradability, high toxicity and bioaccumulation. Hg() has been regarded as one of the most toxic and dangerous heavy metal ions, which is seriously harmful to renal and nervous systems. In our previous work, a series of magnetic graphene oxide samples grafted with polyamidoamine dendrimers (MGO-PAMAM) were prepared, which was expected to remove Hg() from aqueous solution. In this study, the terminal groups of those MGO-PAMAM were modified using chlorohydrin, and consequently the corresponding magnetic graphene oxide grafted with hydroxyl-terminated polyamidoamine dendrimers (MGO-PAMAM-OH) were fabricated. The obtained samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetry analysis (TG), vibrating sample magnetometer (VSM) and X-ray photoelectron spectroscopy (XPS). The adsorption performances of the samples for Hg() were studied by batch experiments. The effects of hydroxyl-terminated PAMAM generations, Hg() initial concentration, solution pH value, and circumstance temperature on the adsorption performances of the samples for Hg() were investigated in detail. The pseudo-first-order and pseudo-second-order kinetics rate equations were used to analyze the adsorption kinetics. The Langmuir isothermal and Freundlich isothermal adsorption models were employed to study the specific adsorption equilibrium. The results confirmed the successful synthesis of the MGO-PAMAM-OH samples, among which the 3.0-generation-hydroxyl-terminated-polyamidoamine-grafted magnetic graphene oxide (MGO-PAMAM-OH-G3.0) exhibits the most satisfactory adsorption-performance for Hg(), with a maximum adsorption capacity of 129.98 mg•g-1. The adsorption of Hg() on MGO-PAMAM-OH-G3.0 coincides well with pseudo-second-order kinetics rate equation, and the adsorption equilibrium is in accord with Langmuir isothermal adsorption model, demonstrating a monolayer chemisorption beha-vior of Hg() on homogeneous surface. In addition, the partial reduction of Hg() ions to Hg() by MGO-PAMAM-OH-G3.0 was observed in the adsorption process. Moreover, MGO-PAMAM-OH-G3.0 is superparamagnetic and the saturation magnetization can attain the requirement of solid-liquid separation. © 2019,Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113826]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Materials Science & Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Ma, Yingxia,Jin, Pengsheng,Shao, Wenjie,et al. Adsorption Behavior of Hg() on the Hydroxyl-Terminated-Polyamidoamine-Grafted Magnetic Graphene Oxide[J]. Cailiao Daobao/Materials Review,2019,33(1):234-239.
APA	Ma, Yingxia,Jin, Pengsheng,Shao, Wenjie,Kou, Yalan,&La, Peiqing.(2019).Adsorption Behavior of Hg() on the Hydroxyl-Terminated-Polyamidoamine-Grafted Magnetic Graphene Oxide.Cailiao Daobao/Materials Review,33(1),234-239.
MLA	Ma, Yingxia,et al."Adsorption Behavior of Hg() on the Hydroxyl-Terminated-Polyamidoamine-Grafted Magnetic Graphene Oxide".Cailiao Daobao/Materials Review 33.1(2019):234-239.