TY - JOUR
T1 - Quantitative source tracking of heavy metals contained in urban road deposited sediments
AU - Hong, Nian
AU - Guan, Yingjie
AU - Yang, Bo
AU - Zhong, Jie
AU - Zhu, Panfeng
AU - Ok, Yong Sik
AU - Hou, Deyi
AU - Tsang, Daniel C.W.
AU - Guan, Yuntao
AU - Liu, An
N1 - Funding Information:
We thank Key-Area Research and Development Program of Guangdong Province (2019B110205003), National Natural Science Foundation of China (21806110), Guangdong Basic and Applied Basic Research Foundation (2019A1515010843) and the Development and Reform Commission of Shenzhen Municipality (urban water recycling and environment safety program) to support this research study.
Funding Information:
We thank Key-Area Research and Development Program of Guangdong Province ( 2019B110205003 ), National Natural Science Foundation of China ( 21806110 ), Guangdong Basic and Applied Basic Research Foundation ( 2019A1515010843 ) and the Development and Reform Commission of Shenzhen Municipality (urban water recycling and environment safety program) to support this research study.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7/5
Y1 - 2020/7/5
N2 - Source tracking for heavy metals contained in road deposited sediments (RDS) is essential for pollution control and human health risk management. Previous studies on tracking sources for heavy metals have mostly been qualitative or semi-quantitative. This study quantitatively assessed the relative contributions of eight sources to five typical heavy metals in the urban environment using a chemical mass-balance based stochastic method. The results indicated that tire wear contributed the most masses to RDS (33 ± 26 %) while brake lining dusts contributed the least. Urban soil, tire wear, and brake lining dusts contributed the most to Pb (41 ± 32 %), Zn (28 ± 25 %), and Cu (59 ± 30 %), respectively, while gasoline engine exhaust was the main source of both Cr (29 ± 28 %) and Ni (20 ± 23 %). The outcomes also showed that tire wear and diesel engine exhaust have higher potential to threaten human health risk because they generate high amounts of heavy metals with high bioaccessibility. The research results can also provide a quantitative guidance for taking remediation actions of heavy metal control on urban road surfaces and measuring the effectiveness of those actions.
AB - Source tracking for heavy metals contained in road deposited sediments (RDS) is essential for pollution control and human health risk management. Previous studies on tracking sources for heavy metals have mostly been qualitative or semi-quantitative. This study quantitatively assessed the relative contributions of eight sources to five typical heavy metals in the urban environment using a chemical mass-balance based stochastic method. The results indicated that tire wear contributed the most masses to RDS (33 ± 26 %) while brake lining dusts contributed the least. Urban soil, tire wear, and brake lining dusts contributed the most to Pb (41 ± 32 %), Zn (28 ± 25 %), and Cu (59 ± 30 %), respectively, while gasoline engine exhaust was the main source of both Cr (29 ± 28 %) and Ni (20 ± 23 %). The outcomes also showed that tire wear and diesel engine exhaust have higher potential to threaten human health risk because they generate high amounts of heavy metals with high bioaccessibility. The research results can also provide a quantitative guidance for taking remediation actions of heavy metal control on urban road surfaces and measuring the effectiveness of those actions.
KW - Environmental pollution
KW - Human health risk
KW - Metals bioaccessibility
KW - Source apportionment
KW - Sustainable development
UR - http://www.scopus.com/inward/record.url?scp=85079893950&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2020.122362
DO - 10.1016/j.jhazmat.2020.122362
M3 - Article
C2 - 32114133
AN - SCOPUS:85079893950
SN - 0304-3894
VL - 393
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 122362
ER -
