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[1]刘晓华,吴宏海,管玉峰,等.针铁矿和蒙脱石对菲的吸附解吸行为与热力学研究[J].地球科学与环境学报,2012,34(01):40-46.
　LIU Xiao-hua,WU Hong-hai,GUAN Yu-feng,et al.Study on the behaviors and thermodynamics of sorption and desorption of goethite and turface to phenanthrene[J].Journal of Earth Sciences and Environment,2012,34(01):40-46.
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针铁矿和蒙脱石对菲的吸附解吸行为与热力学研究(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第34卷
期数:
2012年第01期
页码:
40-46
栏目:
基础地质与矿产地质
出版日期:
2012-03-20

文章信息/Info

Title:
Study on the behaviors and thermodynamics of sorption and desorption of goethite and turface to phenanthrene
作者:
刘晓华; 吴宏海; 管玉峰; 曾丽璇; 邓达义; 何广平
华南师范大学 化学与环境学院,广东 广州 510006
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
关键词:
热力学;  吸附;  解吸;  等温线;  针铁矿;  蒙脱石;  菲;  多环芳烃
Keywords:
thermodynamics;  sorption;  desorption;  isotherm;  goethite;  turface;  phenanthrene;  polycyclic aromatic hydrocarbon
分类号:
P579
DOI:
-
文献标志码:
A
摘要:
采用批量振荡吸附平衡法设计针铁矿和蒙脱石对菲的吸附解吸试验,对比研究了针铁矿和蒙脱石对菲的吸附解吸行为,并考察了不同K+浓度的溶液对蒙脱石吸附菲的影响,比较分析了线性吸附模型和Freundlich吸附模型描述矿物吸附等温线的准确性,并从吸附热力学角度探讨了矿物的吸附机理。结果表明:针铁矿和蒙脱石对菲的吸附解吸均表现出明显的非线性和解吸滞后现象; 相对于线性吸附模型来说,针铁矿和蒙脱石对菲的吸附解吸更符合Freundlich吸附模型; 与蒙脱石相比,针铁矿对菲的吸附更为显著,且具有更好的稳定性; 溶液中软阳离子K+的存在使蒙脱石对菲的吸附能力得到显著提高; 菲在蒙脱石和针铁矿上的吸附过程是一个自发放热,同时伴随着熵值减小的过程; 随着温度的升高,蒙脱石和针铁矿对菲的吸附能力均减弱。
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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备注/Memo

备注/Memo:
收稿日期:2011-04-08
基金项目:国家自然科学基金项目(41072034,40773080); 广东省自然科学基金项目(10151063101000028)
作者简介:刘晓华(1987-),女,广东丰顺人,理学硕士研究生,从事环境生态矿物学研究,E-mail:lxheba@126.com。
更新日期/Last Update: 2012-03-20