TY - JOUR
T1 - Environmental assessment of heavy metal transport and transformation in the Hangzhou Bay, China
AU - Fang, Hongwei
AU - Huang, Lei
AU - Wang, Jingyu
AU - He, Guojian
AU - Reible, Danny
N1 - Funding Information:
This research was financially supported by the National Natural Science Foundation of China (No. 51139003 and No. 11372161). The authors would like to thank Prof. Q. He at the East China Normal University and Environmental Radiation Monitoring Center of Zhejiang Province for their valuable input.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/1/25
Y1 - 2016/1/25
N2 - The environmental impact of heavy metal (Cu, Cd, Zn, Pb, Ni, 90Sr and 137Cs) transport and transformation in the Hangzhou Bay (China) was assessed through a comprehensive model that integrates hydrodynamics, sediment and heavy metal transport. A mechanistic surface complexation model was used to estimate the adsorption and desorption of heavy metal by suspended sediment under different aqueous chemistry conditions. The dynamics of metal exchange to and from the seabed was also assessed. The primary processes regulating heavy metal distribution, i.e., convection-diffusion, adsorption-desorption, sedimentation-resuspension, as well as other physical and chemical processes related to mass exchange between adjacent sediment layers, were considered in detail. The accidental discharge of 137Cs was simulated as an example and results showed that 137Cs transported along the coast driven by tidal flow. Most 137Cs distributed near the outfall and accumulated in the seabed sediment. The proposed model can be a useful tool for predicting heavy metal transport and fate and provide a theoretical basis to guide field sampling, assessment of risks and the design of remediation strategies.
AB - The environmental impact of heavy metal (Cu, Cd, Zn, Pb, Ni, 90Sr and 137Cs) transport and transformation in the Hangzhou Bay (China) was assessed through a comprehensive model that integrates hydrodynamics, sediment and heavy metal transport. A mechanistic surface complexation model was used to estimate the adsorption and desorption of heavy metal by suspended sediment under different aqueous chemistry conditions. The dynamics of metal exchange to and from the seabed was also assessed. The primary processes regulating heavy metal distribution, i.e., convection-diffusion, adsorption-desorption, sedimentation-resuspension, as well as other physical and chemical processes related to mass exchange between adjacent sediment layers, were considered in detail. The accidental discharge of 137Cs was simulated as an example and results showed that 137Cs transported along the coast driven by tidal flow. Most 137Cs distributed near the outfall and accumulated in the seabed sediment. The proposed model can be a useful tool for predicting heavy metal transport and fate and provide a theoretical basis to guide field sampling, assessment of risks and the design of remediation strategies.
KW - Environmental impact
KW - Hangzhou Bay
KW - Heavy metal transport
KW - Numerical modeling
KW - Sediment
UR - http://www.scopus.com/inward/record.url?scp=84945380727&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2015.09.060
DO - 10.1016/j.jhazmat.2015.09.060
M3 - Article
C2 - 26521090
AN - SCOPUS:84945380727
VL - 302
SP - 447
EP - 457
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -