Geochemical baseline level and function and contamination of phosphorus in Liao River Watershed sediments of China.
J Environ Manage
; 128: 138-43, 2013 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-23732192
ABSTRACT
The quantitative assessment of P contamination in sediments is a challenge due to sediment heterogeneity and the lacking of geochemical background or baseline levels. In this study, a procedure was proposed to determine the average P background level and P geochemical baseline level (GBL) and develop P geochemical baseline functions (GBF) for riverbed sediments of the Liao River Watershed (LRW). The LRW has two river systems - the Liao River System (LRS) and the Daliao River System (DRS). Eighty-eight samples were collected and analyzed for P, Al, Fe, Ca, organic matter, pH, and texture. The results show that Fe can be used as a better particle-size proxy to construct the GBF of P (P (mg/kg) = 39.98 + 166.19 × Fe (%), R(2) = 0.835, n = 66). The GBL of P was 675 mg/kg, while the average background level of P was 355 mg/kg. Noting that many large cities are located in the DRS watershed, most of the contaminated sites were located within the DRS and the riverbed sediments were more contaminated by P in the DRS watershed than in the LRS watershed. The geochemical background and baseline information of P are of great importance in managing P levels within the LRW.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Fósforo
/
Poluentes Químicos da Água
/
Sedimentos Geológicos
País/Região como assunto:
Asia
Idioma:
En
Revista:
J Environ Manage
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
China