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Study on the behaviors and thermodynamics of sorption and desorption of goethite and turface to phenanthrene(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第01期
Page:
40-46
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Study on the behaviors and thermodynamics of sorption and desorption of goethite and turface to phenanthrene
Author(s):
LIU Xiao-hua;  WU Hong-hai;  GUAN Yu-feng;  ZENG Li-xuan;  DENG Da-yi;  HE Guang-ping
School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong, China
Keywords:
thermodynamics;  sorption;  desorption;  isotherm;  goethite;  turface;  phenanthrene;  polycyclic aromatic hydrocarbon
PACS:
P579
DOI:
-
Abstract:
The batch vibrated adsorption balance method was used to design the experiment which included the sorption and desorption of goethite and turface to phenanthrene. The behaviors of sorption and desorption were studied; the influences of sorption of turface to phenanthrene were discussed when the concentrations of K+ were different in solution; the sorption isotherms of minerals calculated by linear sorption model and Freundlich sorption model were compared; the sorption mechanism of minerals were discussed based on sorption thermodynamics. The results showed that the sorption and desorption of goethite and turface were nonlinear and hysteretic; compared with linear sorption model, the sorption and desorption of goethite and turface were more in accord with Freundlich sorption model; the sorption of goethite was stronger and more steady than that of turface; the soft cation K+ significantly improved the sorption of turface; the sorption processes of sorption of turface to phenanthrene were spontaneous exothermic, accompanied with the process of entropy decrease; the sorption ability of goethite and turface to phenanthrene was weaken with the temperature increased.

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Last Update: 2012-03-20