同位素示踪探寻池塘微宇宙中银离子与纳米银的归趋与生物可给性
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- 英文论文题名：Probing the differential fates and bioavailabilities of silver ion and silver nanoparticle in pond microcosmos by using isotope tracer
- 论文作者：阴永光 ; 杨青青 ; 谭志强 ; 毛宇翔 ; 刘景富 ; 江桂斌
- 英文论文作者：Yongguang Yin ; Qingqing Yang ; Zhiqiang Tan ; Yuxiang Mao ; Jingfu Liu ; Guibin Jiang ; State Key Laboratory of Environmental Chemistry and Ecotoxicology ; Research Center for Eco-Environmental Sciences ; Chinese Academy of Sciences ; Institute of Resources and Environment ; Henan Polytechnic University
- 年：2016
- 作者机构：中国科学院生态环境研究中心;河南理工大学资源环境学院;
- 论文关键词：银离子 ; 纳米银 ; 池塘微宇宙 ; 稳定同位素示踪 ; 生物可给性
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X17;O657.4;X131
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：157k
- 原文格式：D
- 会议级别：全国
摘要
由于其优越的抗菌特性,纳米银与银离子广泛用于多种消费品之中1。在这些含银消费品的使用过程中,银离子与纳米银不可避免地进入环境。通常认为,银离子的生物可给性与毒性远高于纳米银。但是,许多环境因素(如Cl-、Ca~(2+)、有机质)均可影响氯离子与纳米银的环境归趋。因此,实验室单一环境因素的研究并不能充分反映银离子与纳米银在真实环境中的行为2。我们采用稳定同位素示踪研究了池塘微宇宙中银离子与纳米银的分布与生物可给性。在水柱中,由于氯化银的生成,银离子的半衰期(<1 h)小于纳米银(~3 h)。相应地,浮水植物(浮萍与大薸)对纳米银的摄入高于银离子。而沉水植物金鱼藻对纳米银的摄入与银离子相当。麦穗鱼可摄入更多纳米银,且多积累于肝脏与脑组织。田螺对银离子的摄入高于纳米银。
Silver ion(Ag~+) and silver nanoparticle(AgNP) are widely used in consumer products for their antimicrobial properties.The fates and bioavailabilities of Ag+ and Ag NP evaluated under controlled laboratory conditions may not predict their behaviours in natural environments.In this work,we investigated the differential distributions and bioavailabilities of Ag+ and Ag NP in pond microcosmos by using isotope tracer.We observed that the half-life of Ag~+(<1 h) in water column is much shorter than that of Ag NP(~3 h).Accordingly,the uptake of Ag NP by floating plants(Pistia stratiotes and Salvinia natans) was higher than that of Ag+.While,for submerged plant(Ceratophyllum demersum),the uptake of Ag NP was comparable with that of Ag+.Pseudorasbora parva can accumulate more Ag NP than Ag~+,with higher concentration in liver and brain than other tissues.However,the uptake of Ag~+ by freshwater snail was higher than that of Ag NP.
Silver ion(Ag~+) and silver nanoparticle(AgNP) are widely used in consumer products for their antimicrobial properties.The fates and bioavailabilities of Ag+ and Ag NP evaluated under controlled laboratory conditions may not predict their behaviours in natural environments.In this work,we investigated the differential distributions and bioavailabilities of Ag+ and Ag NP in pond microcosmos by using isotope tracer.We observed that the half-life of Ag~+(<1 h) in water column is much shorter than that of Ag NP(~3 h).Accordingly,the uptake of Ag NP by floating plants(Pistia stratiotes and Salvinia natans) was higher than that of Ag+.While,for submerged plant(Ceratophyllum demersum),the uptake of Ag NP was comparable with that of Ag+.Pseudorasbora parva can accumulate more Ag NP than Ag~+,with higher concentration in liver and brain than other tissues.However,the uptake of Ag~+ by freshwater snail was higher than that of Ag NP.
引文
[1]Chernousova,S.;Epple,M.Angew.Chem.Int.Edit.2013,52:1636.
[2]Furtado,L.M.;Norman,B.C.;Xenopoulos,M.A.;Frost,P.C.;Metcalfe,C.D.;Hintelmann,H.Environ.Sci.Technol.2015,49:8441.
[2]Furtado,L.M.;Norman,B.C.;Xenopoulos,M.A.;Frost,P.C.;Metcalfe,C.D.;Hintelmann,H.Environ.Sci.Technol.2015,49:8441.