|Table of Contents|

Study on the Probability of Heavy Metal Risk and Main Contributing Factors in Small-Sized Estuarine Sediments: a Case Study of Zhongshan River in Jiangsu Province(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2023年01期
Page:
64-72
Research Field:
海洋科学
Publishing date:

Info

Title:
Study on the Probability of Heavy Metal Risk and Main Contributing Factors in Small-Sized Estuarine Sediments: a Case Study of Zhongshan River in Jiangsu Province
Author(s):
Zhang Hong1; Xu Min1; Ding Yanzhe2; Xu Wenjian1; Li Yanxia1
(1.School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China)
(2.Nantong Marine Environmental Monitoring Center, Nantong 226002, China)
Keywords:
small-sized estuary;  sediment heavy metal;  risk probability evaluation;  spatial and temporal distribution characteristic
PACS:
X55; X820.4
DOI:
10.3969/j.issn.1001-4616.2023.01.010
Abstract:
Compared with large inlet rivers,small-sized inlet rivers lack continuous environmental monitoring and ecological and environmental impact studies on estuarine waters. Based on the detection data of seven heavy metals(As,Hg,Cu,Pb,Zn,Cr and Cd)in 70 surface sediment samples collected from seven fixed stations in Zhongshan Estuary in Jiangsu Province from 2013 to 2019,this paper conducted probability evaluations of potential ecological risk and biotoxicity risk using Monte Carlo simulation,and identified the main contributing factors of risk and analyzed their spatial and temporal distribution characteristics. The study showed that the probability of the estuary being at low ecological risk was 4.0%,at medium ecological risk was 69.4%,at high ecological risk was 26.6%,and the potential biotoxicity risk was at low risk. Compared to the potential biotoxicity risk,the potential ecological risk in the study area is of more concern. The main contributing factors of ecological risk in the study area are Hg and Cd,and their historical high value areas are in constant change. It is worth noting that the impact of small-sized estuary on the marine environment is concentrated in the sea area near the estuary,and the existing large-scale environmental monitoring does not accurately reflect the current distribution characteristics of sediment environmental quality in the study area. Strengthening environmental monitoring in small-sized estuaries is the basis for studying the environmental characteristics of such estuaries.

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Last Update: 2023-03-15