Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering ConferenceShanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Characteristics of Heavy Metal Distributions in the Coastal Areas of Yangtze River
Xiaosheng Zhou1，Sha Lou1,2,*，Hao Wang1，Larisa Dorzhievna Radnaeva3，Elena Nikitina3
1. Department of Hydraulic Engineering, Tongji University, Shanghai, China
2. Key Laboratory of Yangtze RiverWater Environment, Ministry of Education, Tongji University, Shanghai, China3. Laboratory of chemistry of natural systems, Baikal Institute of Nature Management of Siberian branch of the Russian Academy of sciences, UlanUde, Republic of Buryatia, Russian.

ABSTRACTThis paper investigates the distribution law of heavy metals in sedimentsin part of the sewage, port, landfill and river intersection, and evaluates
heavy metals in the Yangtze River mouth Pollution by Sediment Quality
Guideline.

With the rapid development of economy and the concentrated
populations, more and more pollutants entry into the water environment
in coastal areas of the Yangtze River Estuary. Field investigations wereconducted twice in this study to evaluate the characteristics of heavy
metals in the coastal areas of the Yangtze River Estuary in January 2021.
Eight sampling locations were selected as Liu Estuary (LHK), Shi Dong
Kou (SDK), Wu Song Kou (WSK), Zhu Yuan (ZY), San Jia Gang (SJG),
Chao Yang Nong Chang (CYNC), Da Zhi River (DZH), Nan Hui (NH).
Eight sediment samples and eight water samples were collected, and theheavy metal distribution characteristics were analyzed. The results haveshown that the concentrations of Cr, Cu, Zn, Cd, and Pb in the surface
sediment sample were 51.96-97.25, 18.40-28.03, 46.47-94.45, 0.1853.095, 11.28-32.08 mg/kg. The Sediment Quality Guideline was used toevaluate the biological effect of sediment. The results show that the mostnegative impact of heavy metals in these areas were Cr and Cu. They
have acute or chronic toxicity to organisms in water, which will reduce
the number of organisms.

MATERIALS AND METHODS
Selection of sampling area
Considering the sewage, port, landfill and river intersection (Dong et al.,2009; Sheng et al., 2008; Zhang et al., 2021), eight locations wereselected for the field investigations: Liu Estuary (LHK), Shi Dong Kou(SDK), Wu Song Kou (WSK), Zhu Yuan (ZY), San Jia Gang (SJG),
Chao Yang Nong Chang (CYNC), Da Zhi River (DZH), Nan Hui (NH).
Sampling locations is shown in Figure 1.

KEY WORLDS: Yangtze River Estuary; sediment; heavy metals
distributions.

INTRODUCTION
In recent years, with the rapid development of economy, pollution fromindustrial and agricultural production enters the Yangtze River Delta andadjacent areas. Although the contaminant can be degraded throughvarious chemistry and biological processes, there are still many
contaminants such as heavy metals, which can be accumulated in theenvironment and harmful for the ecosystems. Heavy metal has become aserious environmental problem due to its toxicity, persistence anddifficult degradation (Zhang et al., 2015; Yi et al., 2017; Dou et al.,2013). These heavy metals experience the physicochemical process suchas adsorption, analysis, precipitating resuspension in the estuary area
(Jian et al., 2003). It causes most heavy metals to transfer in thesuspended sediment and is deposited in the bottom sediment. Under thecomplex hydrodynamic action of the Yangtze River, the highconcentration of the heavy metal is easy to discharge, causing
secondary pollution of the ecosystem of the Yangtze River (Oh,2009).

Figure 1 Sampling Locations at Yangtze River Estuary
Sampling Method
The field samplings were carried out twice in January 23 and January 26,
2021. The sediment and water samples were collected at each location.
The surface sediment within 5cm is grabbed by the grab dredger and100g is placed in the sealed bag as a sample. At the same time, Use a912