Environmental effect of heavy metals deposition in arid city
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Author(s)
Liu, Y
Fu, B
Shen, Y
Liu, C
Liu, H
Zhao, Z
Zhang, L
Griffith University Author(s)
Year published
2019
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This paper analysis the contents and variation of heavy metals in wet and dry deposition in Changji (Xinjiang, China) revealed their reducing regularity for heavy metals in atmosphere in arid area. Samples (including 84 dry deposition samples and 16 wet deposition samples) were collected from January 2016 to December 2016, and the contents of heavy metals (Ni, Cu, Cd and Pb) were analyzed by AA-7000 atomic absorption spectrophotometer. The dry deposition fluxes of Ni, Cu, Cd and Pb are 3.70 mg/(m2 a), 4.81 mg/(m2 a), 0.53 mg/(m2 a) and 22.74 mg/(m2 a), respectively; the wet deposition fluxes of Ni, Cu, Cd and Pb are 0.77 ...
View more >This paper analysis the contents and variation of heavy metals in wet and dry deposition in Changji (Xinjiang, China) revealed their reducing regularity for heavy metals in atmosphere in arid area. Samples (including 84 dry deposition samples and 16 wet deposition samples) were collected from January 2016 to December 2016, and the contents of heavy metals (Ni, Cu, Cd and Pb) were analyzed by AA-7000 atomic absorption spectrophotometer. The dry deposition fluxes of Ni, Cu, Cd and Pb are 3.70 mg/(m2 a), 4.81 mg/(m2 a), 0.53 mg/(m2 a) and 22.74 mg/(m2 a), respectively; the wet deposition fluxes of Ni, Cu, Cd and Pb are 0.77 mg/(m2 a), 3.25 mg/(m2 a), 0.04 mg/(m2 a) and 0.11 mg/(m2 a), respectively. Each of the four heavy metals deposition fluxes during heating period was higher than non-heating period, especially for Pb and Cd, which is mainly due to the emission of coal combustion for heating. During sampling periods, the ratio of wet deposition flux to total for Ni, Cu, Cd and Pb are 17.21%, 40.33%, 7.67% and 0.48%, respectively; the wet deposition flux is far less than dry deposition, especially for Pb. The rate of dry deposition is lower than wet deposition, however dry deposition plays an important role in scavenging heavy metals in arid region. Arid region has a low intensity and frequency of rain event, heavy metals were mainly scavenging by dry deposition attribute to its continuous and dependable process. Dry deposition has much more environmental effect on heavy metal in arid region.
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View more >This paper analysis the contents and variation of heavy metals in wet and dry deposition in Changji (Xinjiang, China) revealed their reducing regularity for heavy metals in atmosphere in arid area. Samples (including 84 dry deposition samples and 16 wet deposition samples) were collected from January 2016 to December 2016, and the contents of heavy metals (Ni, Cu, Cd and Pb) were analyzed by AA-7000 atomic absorption spectrophotometer. The dry deposition fluxes of Ni, Cu, Cd and Pb are 3.70 mg/(m2 a), 4.81 mg/(m2 a), 0.53 mg/(m2 a) and 22.74 mg/(m2 a), respectively; the wet deposition fluxes of Ni, Cu, Cd and Pb are 0.77 mg/(m2 a), 3.25 mg/(m2 a), 0.04 mg/(m2 a) and 0.11 mg/(m2 a), respectively. Each of the four heavy metals deposition fluxes during heating period was higher than non-heating period, especially for Pb and Cd, which is mainly due to the emission of coal combustion for heating. During sampling periods, the ratio of wet deposition flux to total for Ni, Cu, Cd and Pb are 17.21%, 40.33%, 7.67% and 0.48%, respectively; the wet deposition flux is far less than dry deposition, especially for Pb. The rate of dry deposition is lower than wet deposition, however dry deposition plays an important role in scavenging heavy metals in arid region. Arid region has a low intensity and frequency of rain event, heavy metals were mainly scavenging by dry deposition attribute to its continuous and dependable process. Dry deposition has much more environmental effect on heavy metal in arid region.
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Journal Title
Global NEST Journal
Volume
21
Issue
3
Copyright Statement
© 2019 Global NEST. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Subject
Environmental biogeochemistry
Pollution and contamination
Science & Technology
Life Sciences & Biomedicine
Environmental Sciences & Ecology
Arid area