Characteristics of nutrients and heavy metals and potential influence of their benthic fluxes in the Pearl River Estuary, South China.
Mar Pollut Bull
; 179: 113685, 2022 Jun.
Article
in En
| MEDLINE
| ID: mdl-35526378
ABSTRACT
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Metals, Heavy
Country/Region as subject:
Asia
Language:
En
Journal:
Mar Pollut Bull
Year:
2022
Document type:
Article