Characteristics of nutrients and heavy metals and potential influence of their benthic fluxes in the Pearl River Estuary, South China

被引：13
|
作者：
Zhang, Ling [1 ,2 ,3 ]
Ni, Zhixin [4 ]
Li, Jinlong [1 ,5 ]
Shang, Bowen [1 ]
Wu, Yunchao [1 ,2 ]
Lin, Jizhen [1 ]
Huang, Xiaoping [1 ,2 ,5 ,6 ]
机构：
[1] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Peoples R China
[2] Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China
[3] Guangdong Prov Key Lab Marine Resources & Coastal, Guangzhou 510006, Peoples R China
[4] Minist Nat Resources, South China Sea Bur, South China Sea Environm Monitoring Ctr, Guangzhou 510300, Peoples R China
[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[6] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2022年 / 179卷
基金：
中国国家自然科学基金;
关键词：
Nutrient; Heavy metal; Benthic flux; Environment effect; The Pearl River Estuary; SEDIMENT-WATER INTERFACE; OXYGEN; GULF; PHOSPHATE; DYNAMICS; AMMONIUM; NITROGEN; IMPACT; CARBON; SEA;
D O I：
10.1016/j.marpolbul.2022.113685
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Nutrient and heavy metal concentrations in porewater/overlying water and their benthic fluxes were investigated to study their accumulation and transport at the sediment-water interface and the influences of sediment in the Pearl River Estuary, China. Results revealed that distribution of nutrients and metals reflected the effects of terrestrial inputs and some physicochemical processes. Benthic fluxes also suggested that nutrients and heavy metals Pb, Zn and Cd diffused from sediment to overlying water, but not for As, Co, Cr, Fe, Mn and Ni. Exchange capacities showed that 106-108 mol nutrients and 105-107 g Pb, Zn and Cd released from sediment to overlying water annually, indicating their potential ecological threat. However, 105-109 g metals As, Co, Cr, Fe, Mn and Ni were deposited annually, which may reduce the pollution pressure caused by anthropogenic activities. This study will provide references for the potential influence of benthic fluxes on estuarine environment globally.
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页数：10
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