Chemical reactive features of novel amino acids intercalated layered double hydroxides in As(III) and As(V) adsorption

Shen, Liang1; Jiang, Xiuli1,2,3,4; Chen, Zheng2,3; Fu, Dun2,3; Li, Qingbiao1,2,3,5; Ouyang, Tong2,3; Wang, Yuanpeng1

2017-06

10.1016/j.chemosphere.2017.02.100

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Layered double hydroxides (LDHs) intercalated with amino acids such as methionine (Met) were synthesized as new adsorbents to remediate arsenic-polluted water. This Zn2Al-Met-LDHs, identified with the formula of Zn0.7Al0.3(OH)(2)(Met)(0.3).0.32H(2)O, has good thermal stability. Adsorption experiments with Zn2A1-Met-LDHs showed that the residual arsenic in solution could be reduced below the regulation limit, and this adsorption process fitted Langmuir isotherm and the pseudo-second-order kinetics well. A remarkably high removal efficiency and the maximum adsorption capacity for As(III) were achieved, 96.7% and 94.1 mg/g, respectively, at 298 K. The desorption efficiency of As(III) from the arsenic-saturated Zn2Al-Met-LDHs (<8.7%), far less than that of As(V), promises a specific and reliable uptake of As(III) in sorts of solutions. More importantly, a complete and in-depth spectra analysis through FTIR, XPS and NMR was conducted to explain the excellent performance of Zn2Al-Met-LDHs in arsenic removal. Herein, two special chemical reactions were proposed as the dominant mechanisms, i.e., hydrogen bonding between the carboxyl group of the host Met and the hydroxyl group of As(III) or As(V), and the formation of a chelate ring between the guest As(III) and the S, N bidentate ligands of the intercalated Met in the LDHs. (C) 2017 Elsevier Ltd. All rights reserved.

As(III) As(V) Layered double hydroxides Adsorption Methionine

SCI ; EI

英语

其他

Natural Science Foundation of Fujian Provincial University Youth Key Program of China[JZ160461]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000399849300008

PERGAMON-ELSEVIER SCIENCE LTD

20170903404754

Adsorption ; Aluminum compounds ; Amino acids ; Efficiency ; Fourier transform infrared spectroscopy ; Hydrogen bonds ; Intercalation ; Isotherms ; Ligands ; Pollution control ; Water pollution

Water Pollution:453 ; Chemistry:801 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Production Engineering:913.1

ENVIRONMENT/ECOLOGY

Web of Science

1.Xiamen Univ, Coll Chem & Chem Engn, Dept Chem & Biochem Engn, Key Lab Synthet Biotechnol Xiamen City, Xiamen 361005, Peoples R China
2.Xiamen Univ, Coll Environm & Ecol, Dept Environm Engn, Xiamen 361102, Peoples R China
3.Xiamen Univ, Minist Educ Coastal & Wetland Ecosyst, Key Lab, Xiamen 361102, Peoples R China
4.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
5.Quanzhou Normal Univ, Coll Chem & Life Sci, Quanzhou 362000, Peoples R China

Shen, Liang,Jiang, Xiuli,Chen, Zheng,et al. Chemical reactive features of novel amino acids intercalated layered double hydroxides in As(III) and As(V) adsorption[J]. CHEMOSPHERE,2017,176:57-66.

Shen, Liang.,Jiang, Xiuli.,Chen, Zheng.,Fu, Dun.,Li, Qingbiao.,...&Wang, Yuanpeng.(2017).Chemical reactive features of novel amino acids intercalated layered double hydroxides in As(III) and As(V) adsorption.CHEMOSPHERE,176,57-66.

Shen, Liang,et al."Chemical reactive features of novel amino acids intercalated layered double hydroxides in As(III) and As(V) adsorption".CHEMOSPHERE 176(2017):57-66.