|本期目录/Table of Contents|

[1]潘响亮,张道勇,黄承琳.向日葵根分泌物对水合铁氧化物(HFO)吸附Cd2+的促进效应[J].应用与环境生物学报,2010,16(01):33-37.[doi:10.3724/SP.J.1145.2010.00033]
 HUANG Chengling,ZHANG Daoyong,PAN Xiangliang.Enhanced Adsorption of Cd2+ to HFO by Root Exudates from Helianthus annuus[J].Chinese Journal of Applied & Environmental Biology,2010,16(01):33-37.[doi:10.3724/SP.J.1145.2010.00033]
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向日葵根分泌物对水合铁氧化物(HFO)吸附Cd2+的促进效应()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
16卷
期数:
2010年01期
页码:
33-37
栏目:
研究论文
出版日期:
2010-02-25

文章信息/Info

Title:
Enhanced Adsorption of Cd2+ to HFO by Root Exudates from Helianthus annuus
作者:
潘响亮张道勇黄承琳
(1贵州省植物园 贵阳 550004)
(2中国科学院新疆生态与地理研究所 乌鲁木齐 830011)
(3中国科学院地球化学研究所环境地球化学国家重点实验室 贵阳 550002)
Author(s):
HUANG Chengling ZHANG Daoyong PAN Xiangliang
(1Guizhou Botanical Garden, Guiyang 550004, China)
(2Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China)
(3State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China)
关键词:
水合铁氧化物吸附根分泌物向日葵
Keywords:
hydro ferric oxide root exudates Helianthus annuus cadmium adsorption
分类号:
S154.4 : X53
DOI:
10.3724/SP.J.1145.2010.00033
文献标志码:
A
摘要:
研究了向日葵(Helianthus annuus)根分泌物对水合铁氧化物(HFO)吸附Cd2+的行为的影响. 结果表明,向日葵根分泌物具有促进HFO吸附Cd2+的作用. 随着pH升高,HFO对Cd2+的平衡吸附量增加,向日葵根分泌物促进了HFO对镉的吸附. Langmuir方程和Freundlich方程可用来描述HFO对Cd2+的等温吸附行为,拟二级速率方程可描述HFO对Cd2+的吸附动力学. 等温吸附参数和吸附动力学参数表明向日葵根分泌物增加了HFO吸附Cd2+的速率、强度及吸附容量. HFO吸附Cd2+是一个熵增的吸热反应. 向日葵根分泌物的存在使HFO对Cd2+的吸附更容易自发. 图4 表3 参19
Abstract:
The effect of root exudates from Helianthus annuus on adsorption of Cd2+ by hydro ferric oxide (HFO) was investigated. It was demonstrated that the adsorption of Cd2+ by HFO was enhanced when the root exudates from H. annuus existed. The adsorption capacity of Cd2+ by HFO increased with increasing of initial solution pH. The root exudates increased the Cd2+ adsorption capacity when pH varied from 3 to 8. Both the Langmuir and Freundlich isotherms well represented the experimental data, and the pseudo-second order equation well described the kinetic data. Isothermal and kinetic studies showed that the root exudates increased the adsorption strength and adsorption rate. The adsorption of Cd2+ by HFO was an endothermic process whereas the spontaneity of the reaction was enhanced in the presence of the root exudates. Fig 4, Tab 3, Ref 19

参考文献/References:

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备注/Memo

备注/Memo:
中国科学院“百人计划”项目、中国科学院知识创新工程重要方向性项目(No. kzcx2-yw-335)和国家自然科学基金项目(No. 40872169)资助
更新日期/Last Update: 2010-02-09