铁、锰和铝氧化物吸附硒的行为研究
A Study on Selenium Oxyanions Adsorbed onto Iron /Manganese /Aluminum Oxides
查看参考文献38篇
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文摘
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表生环境中,吸附是硒进入固相沉积环境的重要途径之一。为了厘清硒氧阴离子团吸附行为及其影响因素,本文选择赤铁矿、二氧化锰和氧化铝作为吸附剂,采用批次实验的方法,研究了溶液pH、硒浓度以及反应时间等对硒的吸附影响。结果表明: 为了达到较理想的吸附效果,溶液的pH应控制在4 ~ 6之间,在室温、pH为5时,赤铁矿、二氧化锰和氧化铝对亚硒酸盐的饱和吸附量分别约为1.62×10~(-3)、0.33×10~(-3)和1.07× 10-3,对硒酸盐的饱和吸附量分别约为1.0×10~(-3)、0、0.55×10~(-3); 其吸附规律均符合Langmuir等温吸附方程,且理论最大吸附量与实验得出的最大吸附量基本一致。运用准一级动力学、准二级动力学、Elvoich方程和颗粒内扩散模型4种动力学模型对实验数据进行拟合,发现硒吸附过程运用准二级动力学方程表示时相关性最好,表明了硒氧阴离子团在铁、锰、铝氧化物表面的吸附过程较为复杂,可能涉及表面物理吸附和颗粒扩散等过程。 |
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其他语种文摘
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Adsorption is one of the most important pathways for selenium(Se) infiltrating the solid deposits in supergene environment. In order to clarify the adsorption behavior of Se oxyanions and its influencing factors,we selected hematite,manganese dioxide and aluminum oxide as adsorbents,and applied batch experiments to research the effects of pH,Se concentration and contacting time on adsorption. Results show that the optimum pH range for attaining maximum adsorption should be 4-6. At pH= 5 and room temperature,the maximum selenite adsorptions of hematite,manganese oxide and aluminum oxide are approximately 1.62 × 10~(-3),0.33 × 10~(-3),and 1.07 × 10~(-3),respectively while the maximum selenate adsorption of hematite,manganese oxide and aluminum oxide are approximately 1.0× 10-3,0.0 × 10~(-3),and 0.55 × 10~(-3),respectively. These adsorptions completely fit with the Langmuir isotherm and the stoichiometric adsorptions are close to the maximum adsorptions. The pseudo-first and pseudo-second order,Elvoich equations and intra-particle diffusion models were used to fit the experimental data,indicating that the pseudo-second-order kinetics model could best describe the adsorption behaviors. This result demonstrates that the adsorption process of SeO_2-3 /SeO_2- 4 on Fe /Mn /Al oxide surface are complicated,which may involve surface physical adsorption and particle diffusion. |
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来源
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矿物学报
,2017,37(3):357-365 【核心库】
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DOI
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10.16461/j.cnki.1000-4734.2017.03.015
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关键词
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铁、锰、铝氧化物
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硒氧阴离子团
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等温吸附
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动力学
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地址
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1.
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, 贵州, 贵阳, 550081
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中国地质大学(北京), 地质过程与矿产资源国家重点实验室, 北京, 100083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4734 |
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学科
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地质学 |
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基金
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国家自然科学基金资助项目
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国家973计划
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文献收藏号
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CSCD:6026629
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参考文献 共
38
共2页
|
|
1.
Wilber C G. Toxicology of selenium a review.
Clinical Toxicology,1980,17:171-230
|
CSCD被引
19
次
|
|
|
|
|
2.
Foster L H. Selenium in health and disease: A review.
Critical Reviews in Food Science and Nutrition,1997,37:211-228
|
CSCD被引
13
次
|
|
|
|
|
3.
Combs Jr G F. Selenium in global food systems.
British Journal of Nurtrition,2001,85:517-547
|
CSCD被引
66
次
|
|
|
|
|
4.
Navarro-Alarcon M. Selenium in food and the human body A review.
The Science of the Total Environment,2000,249:347-371
|
CSCD被引
19
次
|
|
|
|
|
5.
Tan J A. Selenium in soil and endemic diseases in China.
Science of the Total Environment,2002,284(1/3):227-235
|
CSCD被引
66
次
|
|
|
|
|
6.
Zhu J M. Occurrence of native selenium in Yutangba and its environmental implications.
Applied Geochemistry,2004,19(3):461-467
|
CSCD被引
21
次
|
|
|
|
|
7.
Zhu J M. Distribution and transport of selenium in Yutangba,China: Impact of human activities.
Science of the Total Environment,2008,392(2/3):252-261
|
CSCD被引
19
次
|
|
|
|
|
8.
朱建明. 环境中硒存在形式的研究现状.
矿物岩石地球化学通报,2003,22:75-81
|
CSCD被引
54
次
|
|
|
|
|
9.
秦海波. 环境中硒形态分析方法的研究进展.
矿物岩石地球化学通报,2008,27:181-185
|
CSCD被引
1
次
|
|
|
|
|
10.
魏显有. 土壤中硒的形态分布及有效态研究.
河北农业大学学报,1999,22:20-23
|
CSCD被引
23
次
|
|
|
|
|
11.
Zhu J M. Selenium redox cycling during weathering of Se-rich shales: A selenium isotope study.
Geochimica et CosmochimicaActa,2014,126:228-249
|
CSCD被引
14
次
|
|
|
|
|
12.
Manceau A. The Mechanism of Selenate Adsorption on Goethite and Hydrous Ferric Oxide.
Journal of Colloid and Interface Science,1994,168:87-93
|
CSCD被引
6
次
|
|
|
|
|
13.
Kuan W H. Removal of Se(Ⅳ) and Se(Ⅵ) from water by aluminum-oxide-coated sand.
Water Research,1998,32:915-923
|
CSCD被引
10
次
|
|
|
|
|
14.
Peak D. Selenite Adsorption Mechanisms on Pure and Coated Montmorillonite: An EXAFS and XANES Spectroscopic Study.
Soil Science Society of America Journal,2006,70:192-203
|
CSCD被引
4
次
|
|
|
|
|
15.
Kamei-Ishikawa N. Sorption kinetics of selenium on humic acid.
Journal of Radioanalytical and Nuclear Chemistry,2007,274:555-561
|
CSCD被引
10
次
|
|
|
|
|
16.
Balistrieri L S. Selenium Adsorption by Goethite.
Soil Science Society of America Journal,1987,51:1145-1151
|
CSCD被引
13
次
|
|
|
|
|
17.
Balistrieri L S. Adsorption of selenium by amorphous iron oxyhydroxide and manganese dioxide.
Geochimica et CosmochimicaActa,1990,54:739-751
|
CSCD被引
8
次
|
|
|
|
|
18.
Catalano J G. Inner-sphere adsorption geometry of Se(Ⅳ) at the hematite(100) -water interface.
Journal of Colloid and Interface Science,2006,297:665-671
|
CSCD被引
2
次
|
|
|
|
|
19.
Das S. Adsorption of selenate onto ferrihydrite,goethite,and lepidocrocite under neutral pH conditions.
Applied Geochemistry,2013,28:185-193
|
CSCD被引
9
次
|
|
|
|
|
20.
Findon A. Transport studies for the sorption of copper ions by Chitosan.
Journal of Environmental Science and Health,Part A,1993,28:173-185
|
CSCD被引
11
次
|
|
|
|
|
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