TITLE:
Study on Phosphorus Characteristics in Sediments of Xiangxi Bay, China Three-Gorge Reservoir
AUTHORS:
Huajun Luo, Defu Liu, Yingping Huang
KEYWORDS:
Phosphorus, Characteristics, Fractions, Sediments, Xiangxi Bay
JOURNAL NAME:
Journal of Environmental Protection,
Vol.6 No.4,
March
31,
2015
ABSTRACT: To explore
the environment influence of the sediments in Xiangxi Bay (China Three-Gorge
Reservoir), spatial and temporal distribution characteristics of total
phosphorus (TP), phosphorus fractions, dissolved total phosphorus (DTP) of pore
water and overlying water in the sediments were investigated. In surveys, the
sampling was undertaken from six sites of Xiangxi Bay on 29 March 2009 and 28
March 2010. TP contents ranged from 1111.29 mg/kg to 1941.29 mg/kg with the
mean value of 1533.09 mg/kg in 2009 spring and 1600.48 mg/kg in 2010 spring.
Five fractions of sedimentary phosphorus, including loosely sorbed phosphorus
(NH4Cl-P), redox-sensitive phosphorus (BD-P), metal oxide bound
phosphorus (NaOH-P), calcium bound phosphorus (HCl-P), and residual phosphorus (Res-P),
were separately quantified. DTP of pore water and overlying water all have
positive correlations with NH4Cl-P and BD-P, which indicated that NH4Cl-P
and BD-P were the main fractions that can easily release phosphorus in the
sediments of Xiangxi Bay.