Speciation and sorption structure of diphenylarsinic acid in soil clay mineral fractions using sequential extraction and EXAFS spectroscopy

doi:10.1007/s11368-019-02431-2

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 近岸生态与环境实验室

	Speciation and sorption structure of diphenylarsinic acid in soil clay mineral fractions using sequential extraction and EXAFS spectroscopy
	Zhu, M ; Hu, XF ; Tu, C ; Luo, YM ; Yang, RY ; Zhou, SB ; Cheng, NN ; Rylott, EL
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2020-02
卷号	20 期号:2 页码:763-774
关键词	Diphenylarsinic acid (DPAA) EXAFS Sequential extraction Speciation Sorption structure
ISSN号	1439-0108
DOI	10.1007/s11368-019-02431-2
产权排序	[Zhu, Meng ; Yang, Ruy ; Zhou, Shoubiao ; Cheng, Nannan] Anhui Normal Univ, Coll Environm Sci & Engn, Wuhu 241002, Peoples R China ; [Luo, Yongming] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China ; [Zhu, Meng ; Hu, Xuefeng ; Tu, Chen ; Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China ; [Zhu, Meng ; Yang, Ruy ; Zhou, Shoubiao] Anhui Normal Univ, Anhui Prov Engn Lab Water & Soil Pollut Control &, Wuhu 241002, Peoples R China ; [Rylott, Elizabeth L.] Univ York, Dept Biol, Ctr Novel Agr Prod, York YO10 5DD, N Yorkshire, England
文献子类	Article
英文摘要	Purpose The mobility of arsenic (As) in soils is fundamentally affected by the clay mineral fraction and its composition. Diphenylarsinic acid (DPAA) is an organoarsenic contaminant derived from chemical warfare agents. Understanding how DPAA interacts with soil clay mineral fractions will enhance understanding of the mobility and transformation of DPAA in the soil-water environment. The objective of this study was to investigate the speciation and sorption structure of DPAA in the clay mineral fractions. Materials and methods Twelve soils were collected from nine Chinese cities which known as chemical weapons burial sites and artificially contaminated with DPAA. A sequential extraction procedure (SEP) was employed to elucidate the speciation of DPAA in the clay mineral fractions of soils. Pearson's correlation analysis was used to derive the relationship between DPAA sorption and the selected physicochemical properties of the clay mineral fractions. Extended X-ray absorption fine structure (EXAFS) L-III-edge As was measured using the beamline BL14W1 at Shanghai Synchrotron Radiation Facility (SSRF) to identify the coordination environment of DPAA in clay mineral fractions. Results and discussion The SEP results showed that DPAA predominantly existed as specifically fraction (18.3-52.8%). A considerable amount of DPAA was also released from non-specifically fraction (8.2-46.7%) and the dissolution of amorphous, poorly crystalline, and well-crystallized Fe/Al (hydr)oxides (20.1-46.2%). A combination of Pearson's correlation analysis and SEP study demonstrated that amorphous and poorly crystalline Fe (hydr)oxides contributed most to DPAA sorption in the clay mineral fractions of soils. The EXAFS results further demonstrated that DPAA formed inner-sphere complexes on Fe (hydr)oxides, with As-Fe distances of 3.18-3.25 angstrom. It is likely that the steric hindrance caused by phenyl substitution and hence the instability of DPAA/Fe complexes explain why a substantial amount of DPAA presented as weakly bound forms. Conclusions DPAA in clay mineral fractions predominantly existed as specifically, amorphous, poorly crystalline, and crystallized Fe/Al (hydr)oxides associated fractions. Amorphous/poorly crystalline Fe rather than total Fe contributed more to DPAA sorption and DPAA formed inner-sphere complexes on Fe (hydr)oxides.
WOS关键词	P-ARSANILIC ACID ; CONTAMINATED SOILS ; ARSENIC BIOACCESSIBILITY ; ATR-FTIR ; IRON (OXYHYDR)OXIDES ; SURFACE COMPLEXATION ; ADSORPTION ; DESORPTION ; MOBILITY ; BIOAVAILABILITY
WOS研究方向	Environmental Sciences ; Soil Science
语种	英语
WOS记录号	WOS:000513281900017
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24760]
专题	烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Anhui Normal Univ, Coll Environm Sci & Engn, Wuhu 241002, Peoples R China; 2.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China; 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China; 4.Anhui Normal Univ, Anhui Prov Engn Lab Water & Soil Pollut Control &, Wuhu 241002, Peoples R China; 5.Univ York, Dept Biol, Ctr Novel Agr Prod, York YO10 5DD, N Yorkshire, England
推荐引用方式 GB/T 7714	Zhu, M,Hu, XF,Tu, C,et al. Speciation and sorption structure of diphenylarsinic acid in soil clay mineral fractions using sequential extraction and EXAFS spectroscopy[J]. JOURNAL OF SOILS AND SEDIMENTS,2020,20(2):763-774.
APA	Zhu, M.,Hu, XF.,Tu, C.,Luo, YM.,Yang, RY.,...&Rylott, EL.(2020).Speciation and sorption structure of diphenylarsinic acid in soil clay mineral fractions using sequential extraction and EXAFS spectroscopy.JOURNAL OF SOILS AND SEDIMENTS,20(2),763-774.
MLA	Zhu, M,et al."Speciation and sorption structure of diphenylarsinic acid in soil clay mineral fractions using sequential extraction and EXAFS spectroscopy".JOURNAL OF SOILS AND SEDIMENTS 20.2(2020):763-774.