Distribution characteristics of Hg and As in the water-SPM system in the Xiaoqing river estuary and coastal

Feifei Zhang; Dong Zhang; Xiaoyue Li; Huawei Lou; Hongrui Fu; Xiaojun Sun; Peiyan Sun; Xinping Wang; Mutai Bao

doi:10.1016/j.marenvres.2024.106932

Distribution characteristics of Hg and As in the water-SPM system in the Xiaoqing river estuary and coastal

Mar Environ Res. 2024 Dec 24:204:106932. doi: 10.1016/j.marenvres.2024.106932. Online ahead of print.

Authors

Feifei Zhang¹, Dong Zhang², Xiaoyue Li³, Huawei Lou³, Hongrui Fu¹, Xiaojun Sun¹, Peiyan Sun⁴, Xinping Wang⁴, Mutai Bao⁵

Affiliations

¹ Frontiers Science Center for Deep Ocean Multispheres and Earth System, And Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
² Shouguang Marine Fishery Development Center, Weifang, 262700, China. Electronic address: [email protected].
³ Shouguang Marine Fishery Development Center, Weifang, 262700, China.
⁴ Key Laboratory of Ecological Warning, Protection & Restoration for Bohai Sea, Ministry of Natural Resources, Qingdao, 266100, China.
⁵ Frontiers Science Center for Deep Ocean Multispheres and Earth System, And Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China. Electronic address: [email protected].

PMID: 39742774
DOI: 10.1016/j.marenvres.2024.106932

Abstract

Water and suspended particulate matter (SPM) were collected from Xiaoqing Estuary and its adjacent waters in August 2022 to study the spatial distribution and risk assessment of Hg and As. The content of Hg in SPM samples ranged from 4.7152 to 446.8678 mg kg^-1, and the content of As ranged from 90.1739 to 1147.5500 mg kg^-1. The content of Hg in water ranges from 0.0219 to 0.0986 μg L^-1, and the content of As ranges from 1.4326 to 11.6750 μg L^-1. Xiaoqing River runoff input is the main source of Hg and As. Particulate Hg and As was extremely polluted, water was much less of a risk. It indicated that SPM accumulates more dangerous pollutants (Hg and As). In both water and SPM, it turned out that Hg has a higher risk than As (i.e., CF(Hg) > CF(As), I_geo(Hg) > I_geo(As)). The analysis showed that the environmental factors of water further affected the distribution of Hg or As in water and SPM by influencing biological activity.

Keywords: As; Distribution; Hg; Water-suspended particulate matter; Xiaoqing river.