Climate Change Data Portal
DOI | 10.1007/s11368-018-1918-2 |
Retention of silver nanoparticles and silver ion to natural soils: effects of soil physicochemical properties | |
Wang, Rui1,2; Du, Huan1; Wang, Yujun1; Wang, Dengjun3; Sun, Qian1; Zhou, Dongmei1 | |
发表日期 | 2018-07-01 |
ISSN | 1439-0108 |
卷号 | 18期号:7页码:2491-2499 |
英文摘要 | The mass production and widespread use of silver nanoparticles (AgNPs) have led to their wide dissimilation in the subsurface environments (e.g., natural soils). The retention propensities of AgNPs in soils dictate their fate, transport, and transformation in the subsurface environments. The aim of this study was to explore the retention behaviors of AgNPs and Ag+ ion (as a comparison) in ten natural soils with different physicochemical properties, identifying which properties dominate their mobility in soils. Ten surface (0-20 cm) soils sampled across five geographical regions of China and AgNPs coated by polyvinylpyrrolidone (PVP) with an average transmission electron microscopy (TEM) diameter of similar to 10 nm were used in this study. Batch retention experiments of AgNPs and AgNO3 in ten soils (pass through 60-mesh sieve) were conducted in triplicate at 25 A degrees C for 24 h. Multiple regression analyses of maximum retention capacity (Q(max) for AgNPs or Ag+ ion) simulated by Langmuir retention models were performed to identify which soil physicochemical properties dominate the retention behavior of AgNPs and Ag+ ion. TEM combined with energy dispersive X-ray spectroscopy (EDS) analyses was applied to visually unravel the distribution and retention behavior of AgNPs on natural soils. The results of batch retention experiments showed that Langmuir model well-approximated the retention isotherms of AgNPs and Ag+ on ten soils and that the Q(max) value of AgNPs was generally lower than that of Ag+ on soils. The results of multiple regression analyses showed that the retention capacity of AgNPs on soils was positively correlated with the iron oxide content, which is visually confirmed by TEM-EDS observations, whereas retention capacity of Ag+ ions was mainly related to soil organic matter (SOM) content. Maximum retention capacity of AgNPs and Ag+ ion in soils varied with soil physicochemical properties, and particularly, iron oxide and SOM contents are two pivotal parameters controlling Q(max). These findings advance our current understanding of the mechanisms controlling retention and transport of AgNPs in natural soils, which represents an important step toward predicting the fate, transport, and potential toxicity of AgNPs in the subsurface environment. |
英文关键词 | Iron oxide;Natural soils;Retention;Silver ion;Silver nanoparticles;Soil organic matter |
语种 | 英语 |
WOS记录号 | WOS:000434800400005 |
来源期刊 | JOURNAL OF SOILS AND SEDIMENTS
![]() |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/60010 |
作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.US EPA, Natl Res Council, Resident Res Associate, Ada, OK 74820 USA |
推荐引用方式 GB/T 7714 | Wang, Rui,Du, Huan,Wang, Yujun,et al. Retention of silver nanoparticles and silver ion to natural soils: effects of soil physicochemical properties[J]. 美国环保署,2018,18(7):2491-2499. |
APA | Wang, Rui,Du, Huan,Wang, Yujun,Wang, Dengjun,Sun, Qian,&Zhou, Dongmei.(2018).Retention of silver nanoparticles and silver ion to natural soils: effects of soil physicochemical properties.JOURNAL OF SOILS AND SEDIMENTS,18(7),2491-2499. |
MLA | Wang, Rui,et al."Retention of silver nanoparticles and silver ion to natural soils: effects of soil physicochemical properties".JOURNAL OF SOILS AND SEDIMENTS 18.7(2018):2491-2499. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。