Comparison of arsenic fractions and health risks in PM2.5 before and after coal-gas replacement

被引：20
|
作者：
Xie, Jiao-Jiao [1 ]
Yuan, Chun-Gang [1 ,2 ]
Xie, Jin [1 ]
Niu, Xiao-Dong [1 ]
Zhang, Xu-Rui [1 ]
Zhang, Ke-Gang [1 ]
Xu, Pei-Yao [1 ]
Ma, Xiao-Ying [1 ]
Lv, Xiang-Bing [3 ]
机构：
[1] North China Elect Power Univ, Dept Environm Sci & Engn, Hebei Key Lab Power Plant Flue Gas Multipollutant, Baoding 071000, Peoples R China
[2] North China Elect Power Univ, Coll Environm Sci & Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China
[3] Datang Baoding Thermal Power Plant, Baoding 071000, Peoples R China
来源：
ENVIRONMENTAL POLLUTION | 2020年 / 259卷
基金：
中国国家自然科学基金;
关键词：
PM2.5; Arsenic; Fraction; Bioavailability; Heath risk; IN-VITRO BIOACCESSIBILITY; HEAVY-METALS; SEASONAL-VARIATION; FUNCTIONAL AREAS; BAODING CITY; POLLUTION; SOILS; BIOAVAILABILITY; METAL(LOID)S; SPECIATION;
D O I：
10.1016/j.envpol.2019.113881
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Coal-Gas replacement project has been implemented to decrease haze pollution in China in recent years. Airborne arsenic (As) mostly originates from coal burning processes. It is noteworthy to compare the distribution of arsenic fraction in PM2.5 before and after coal-gas replacement. Eighty PM2.5 samples were collected in Baoding in December 2016 (coal dominated year) and December 2017 (gas dominated year) at different functional areas including residential area (RA), industrial area (IA), suburb (SB), roadside (ST) and Botanical Garden Park (BG). The fraction, bioavailability and health risk of As in the PM2.5 samples were investigated and compared between these two years. Arsenic was mainly distributed in the nonspecifically sorbed fraction (F1) and the residual fraction (F5). However, the proportion of F1 to the total As in 2017 was higher than that in 2016, while the proportion of As in the amorphous and poorlycrystalline hydrous oxides of Fe and Al fraction (F3) in 2017 was lower. The distributions of fraction and bioavailability showed temporal and spatial characteristics. The total concentration and bioavailability of As in SB and IA were significantly higher than those in RA, ST and BG. The BF (Bioavailability Factor) values of As ranged from 0.30 to 0.61. Health risk assessment indicated that the hazard quotient (HQ) and carcinogenic risk (CR) of As in PM2.5 significantly decreased after coal-gas replacement. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：8
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