Bioavailability and speciation of arsenic in urban street dusts from Baoding city, China

Chemical Speciation & Bioavailability

Xiang Zhao¹  Xuan Hu¹  Chun-Gang Yuan¹  Jiao-Jiao Xie¹  Ke-Gang Zhang¹  Yi-Wen Shen¹ 

[1] North China Electric Power University;

关键词: Street dust;    arsenic;    bioavailability;    sequential extraction;   

DOI  :  10.1080/09542299.2017.1366281

来源: DOAJ

【 摘 要 】

Twenty-one street dust samples were collected from the urban sites in Baoding, China, to investigate the species and bioavailabilty of arsenic in them. The ecological risk and bioavailability of arsenic were evaluated using three models including Bioavailability Factor (BF), Contamination Factors (Cf)and Geoaccumulation Index model (Igeo). The species of arsenic in the dust samples were analyzed using an optimized BCR sequential extraction method. The total concentrations of As in the street dust samples ranged from 13.16 mg kg−1 to 67.26 mg kg−1. Geoaccumulation index (Igeo) of As ranged from 0.28 to 1.99. The speciation analysis indicated that As in the street dust samples were mainly in the residual fraction (F4), and the proportion ranged from 84.35% to 87.07%. Moreover, the ranges of the BF and Cf were 0.650–0.129 and 0.119–0.186, respectively. The results indicated that arsenic contained in the street dust samples was with low bioavailability.

【 授权许可】

Unknown