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| A critical review on the speciation and development of sequential extraction procedures for arsenic in soils |
| Received:April 25, 2018 |
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| KeyWord:arsenic;speciation;sequential extraction procedure;soil;Wenzel method |
| Author Name | Affiliation | E-mail | | LIU Guan-nan | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | | | CHEN Ming | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China | 58598025@qq.com | | LI Wu-qing | Test Center, Hunan Institute of Geological Survey, Changsha 410116, China | | | GONG Wen-wen | Beijing Research Center for Agriculture Standards and Testing, Beijing 100097, China | gongww@brcast.org.cn |
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| Abstract: |
| Sequential extraction procedure (SEP) is as an important method for the study of the speciation of trace elements in soils. It is of great significance in the assessment of environmental risk. The migration and transformation behaviors of arsenic in soils are significantly different from those of other heavy metals. Therefore, the SEPs for most heavy metals are not suitable for quantifying arsenic speciation in soils, and a specific SEP for arsenic in soils is required. This paper critically reviewed the geochemical fractions of arsenic in soils as well as the extractants, procedure, and development of SEPs for arsenic in soils. The advantages and disadvantages of some prevalent SEPs, such as the Wenzel method, Shiowatana method, Keon method, and Drahota method, were proposed to provide a reference for the extraction of arsenic speciation in soils. Finally, an overview of the combination of various instrumental analytical techniques and SEPs for arsenic speciation in soils was provided. |
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