Evaluations of submarine groundwater discharge and associated heavy metal fluxes in Bohai Bay, China

Wang，Qianqian1,2; Li，Hailong2,3; Zhang，Yan1,2; Wang，Xuejing3; Zhang，Chengcheng4; Xiao，Kai3; Qu，Wenjing5

2019-12-10

10.1016/j.scitotenv.2019.133873

SCIENCE OF THE TOTAL ENVIRONMENT   影响因子和分区

0048-9697

1879-1026

Submarine groundwater discharge (SGD) has been recognized as an important source of dissolved heavy metals to the coastal ocean. Bohai Bay, the second largest bay of Bohai Sea in China, is subjected to serious environmental problems. However, SGD and SGD-derived heavy metal fluxes in the bay are seldom reported. In this study, we present mass balance models considering the radium losses caused by recirculated seawater to estimate water age, SGD and SGD-derived heavy metal fluxes in Bohai Bay during May 2017. The water age is estimated to be 56.7–85.0 days based on tidal prism model. By combining water and salt mass balance models, submarine fresh groundwater discharge (SFGD) is estimated to be (3.5–9.3) × 10 m d. The SGD flux estimated by the radium mass balance models is (3.2–7.7) × 10 m d, an order of magnitude larger than the discharge of the Yellow River during the sampling period. SGD-derived heavy metal fluxes were estimated to be (0.2–6.0) × 10 mol d for Fe, (1.2–2.7) × 10 mol d for Mn, (3.0–8.2) × 10 mol d for Zn, (2.7–7.4) × 10 mol d for Cr and (0.6–1.8) × 10 mol d for Cd, which are significantly higher than those from local rivers. This study reveals that SGD is a significant source of heavy metals (Mn, Zn and Fe) into Bohai Bay, which may have important influences on the metal budgets and ecological environments in coastal areas.

Bohai Bay Heavy metals Radium isotopes Submarine fresh groundwater discharge Submarine groundwater discharge Water age

SCI ; EI

英语

通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000496802200061

ELSEVIER

20193307323729

Budget control ; Groundwater ; Heavy metals ; Radium ; Submarines

Groundwater:444.2 ; Metallurgy and Metallography:531 ; Radioactive Materials, General:622.1 ; Combat Naval Vessels:672.1

ENVIRONMENT/ECOLOGY

2-s2.0-85070631485

Scopus

1.MOE Key Laboratory of Groundwater Circulation and Environment Evolution and School of Water Resources and EnvironmentChina University of Geosciences (Beijing),Beijing,100083,China
2.State Key Laboratory of Biogeology and Environmental GeologyChina University of Geosciences (Beijing),Beijing,100083,China
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control and School of Environmental Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
4.Northwest Institute of Nuclear Technology,Xi'an,710024,China
5.School of Water Resources and EnvironmentHebei GEO University,Shijiazhuang,050031,China

Wang，Qianqian,Li，Hailong,Zhang，Yan,et al. Evaluations of submarine groundwater discharge and associated heavy metal fluxes in Bohai Bay, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,695.

Wang，Qianqian.,Li，Hailong.,Zhang，Yan.,Wang，Xuejing.,Zhang，Chengcheng.,...&Qu，Wenjing.(2019).Evaluations of submarine groundwater discharge and associated heavy metal fluxes in Bohai Bay, China.SCIENCE OF THE TOTAL ENVIRONMENT,695.

Wang，Qianqian,et al."Evaluations of submarine groundwater discharge and associated heavy metal fluxes in Bohai Bay, China".SCIENCE OF THE TOTAL ENVIRONMENT 695(2019).