全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

水田土壤富里酸组分的结构表征及对多环芳烃芘的吸附特征

Keywords: 富里酸组分,,吸附

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文依次用pH4.8、pH7.0及pH11.0的通用缓冲液、水和乙醇,梯度淋洗吸附富里酸的XAD-8树脂,根据其不同解离程度及亲水性质将富里酸细分为5个组分(包括3个亲水性组分和2个疏水性组分);利用元素分析、红外光谱和核磁共振等分析方法确定各组分的理化特征,并研究各组分对特定多环芳烃(芘)的吸附特性。结果表明,按照淋洗次序,后分离的组分其羧基碳含量低于先分离的组分,烷基碳含量则高于后者;芘在被水和乙醇淋洗出的两种组分上的吸附等温线体现出良好的线性;组分中的烷基组分对吸附有促进作用,相反,羧基和羰基不利于芘的吸附,表明梯度淋洗分组方法对研究芘与富里酸的作用机理是十分有效的。

References

[1]  Landgraf M D,da Silva S C,Rezende M O D,Mechanism of metribuzin herbicide sorption by humic acid samples from peat and vermicompost,Analytica Chimica Acta,1998(2).
[2]  Weber Jr W J,Me Ginley P M,Katz L E,A distributed reactivity model for sorption by soils and sediments.1.conceptual basis and equilibrium assessments,Environmental Science and Technology,1992(10).
[3]  秦淑平.代静玉.周江敏 不同利用方式下黄泥土中胡敏酸对芘的吸附特性初探 [J].-土壤通报2004(6)
[4]  Peuravuori J,Binding of pyrene on lake aquatic humic matter:the role of structural descriptors,Analytica Chimica Acta,2001(1).
[5]  Chiou C T,Sawhney B L,Brown K,Reactions and movement of organic chemicals in soils,SSSA Spec.Publ.SSSA,Madison,WI,1989.
[6]  Guthrie E A,Pfacnder F K,Reduced pyrene bioavailability in microbially active soils,Environmental Science and Technology,1998(4).
[7]  Cornelissen G,Rigtcrink H,Ferdinandy M M A,Rapidly desorbing fractions of PAHs in contaminated sediments as a predictor of the extent of bioremediation,Environmental Science and Technology,1998(7).
[8]  Jones K C,de Voogt P,Persistent organic pollutants(POPs):state of the science,Environmental Pollution,1999(3).
[9]  Chefetz B,Tarchitzky J,Deshmukh A P,Structural characterization of soil organic matter and humic acids in particle-size fractions of an agricultural soil,Soil Science Society of America Journal,2002(1).
[10]  Hayes M H B,Clapp C E,Humic substances:considerations of compositions,aspects of structure,and environmental influences,Soil Science,2001(11).
[11]  Gauthier T D,Seitz W R,Grant C L,Effects of structural and compositional variations of dissolved humic materials on pyrene Koc values,Environmental Science and Technology,1987(3).
[12]  Chin Y P,Aiken G R,Danielsen K M,Binding of pyrene to aquatic and commercial humic substances:the role of molecular weight and aromaticity,Environmental Science and Technology,1997(6).
[13]  Kile D E,Chiou C T,Zhou H,Partition of nonpolar organic pollutants from water to soil and sediment organic matters,Environmental Science and Technology,1995(5).
[14]  Chiou C T,McGroddy S E,Kile D E,Partition characteristics of polycyclic aromatic hydrocarbons on soils and sediments,Environmental Science and Technology,1998(2).
[15]  Luthy R G,Aken G R,Brusseau M L,Sequestration of hydrophobic organic contaminants by geosorbents,Environmental Science and Technology,1997(12).
[16]  Chefetz B,Deshmukh A P,Hatcher P G,Pyrene sorption by natural organic matter,Environmental Science and Technology,2000(14).
[17]  Xing B,Sorption of naphthalene and phenanthrene by soil humic acids,Environmental Pollution,2001(2).
[18]  Dai J Y,Ran W,Xing B S,Characterization of fulvic acid fractions obtained by sequential extractions with pH buffers,water,and ethanol from paddy soils,Geoderma,2006.
[19]  Swift R S,Sparks D L,Bartels J M,Methods of soil analysis:part 3,chemical methods,Madison,Wisconsin,USA,1996.
[20]  Christi I,Knicker H,Kogel-Knabner I,Chemical heterogeneity of humic substances:characterization of size fractions obtained by hollow-fibre ultrafiltration,European Journal of Soil Science,2000(4).
[21]  Lubal P,Siroky D,Fetsch D,The acidobasic and complexation properties of humic acids:study of complexation of czech humic acids with metal ions,Talanta,1998(2).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133