PMID- 23213920
OWN - NLM
STAT- MEDLINE
DCOM- 20131205
LR  - 20161018
IS  - 0250-3301 (Print)
IS  - 0250-3301 (Linking)
VI  - 33
IP  - 8
DP  - 2012 Aug
TI  - [Adsorption characteristics and mechanism of uranium on attapulgite].
PG  - 2889-94
AB  - The adsorption characteristics of uranium on attapulgite were investigated by 
      conducting a series of batch adsorption experiments in this study. The influence 
      of solution pH, initial uranium concentration and contact time was investigated. 
      Scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to 
      characterize the surface structure of the attapulgite, Fourier transform infrared 
      spectrometer (FTIR) were used to characterize the surface properties of the 
      attapulgite before and after uranium adsorption, and to analyze the adsorption 
      mechanism and adsorption kinetics of uranium on attapulgite. The experimental 
      results showed that sorption of uranium on attapulgite was strongly dependent on 
      pH, and the highest adsorption reached at pH = 5. The adsorption quantity 
      increased with time, adsorption could achieve balance in 2 h. The adsorption 
      isotherm equation conformed to the Langmuir isothermal adsorption model and 
      adsorption process could be described by the two-order kinetics model. According 
      to FTIR spectral, the absorbance of attapulgite decreased, which may result from 
      R--OUO2+ or (R--O)2UO2 formed by the bond between uranium and R-OH of attapulgite 
      in the high frequency area 3700-3000 cm(-1), and which uranium ion and magnesium 
      ions may produce ion exchanges in the intermediate frequency area 1700-800 
      cm(-1). Adsorption mechanism of uranium on attapulgite was mainly ion exchange 
      and complexation.
FAU - Liu, Juan
AU  - Liu J
AD  - School of Environmental Science & Engineering, Guangzhou University, Guangzhou 
      510006, China. lj_brave@hotmail.com
FAU - Chen, Di-yun
AU  - Chen DY
FAU - Zhang, Jing
AU  - Zhang J
FAU - Song, Gang
AU  - Song G
FAU - Luo, Ding-gui
AU  - Luo DG
LA  - chi
PT  - English Abstract
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - China
TA  - Huan Jing Ke Xue
JT  - Huan jing ke xue= Huanjing kexue
JID - 8405344
RN  - 0 (Magnesium Compounds)
RN  - 0 (Silicon Compounds)
RN  - 0 (Soil Pollutants, Radioactive)
RN  - 4OC371KSTK (Uranium)
RN  - U6V729APAM (attapulgite)
SB  - IM
MH  - Adsorption
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Magnesium Compounds/*chemistry
MH  - Silicon Compounds/*chemistry
MH  - Soil Pollutants, Radioactive/chemistry/*isolation & purification
MH  - Uranium/chemistry/*isolation & purification
EDAT- 2012/12/12 06:00
MHDA- 2013/12/16 06:00
CRDT- 2012/12/11 06:00
PHST- 2012/12/11 06:00 [entrez]
PHST- 2012/12/12 06:00 [pubmed]
PHST- 2013/12/16 06:00 [medline]
PST - ppublish
SO  - Huan Jing Ke Xue. 2012 Aug;33(8):2889-94.