Vertical distribution and release characteristics of phosphorus forms in the sediments from the river inflow area of Dianchi Lake, China

Abstract

Columnar sediment samples were collected from five representative river inflow areas of Dianchi Lake, China. The vertical distribution of each form of P were tested. , respectively. The concentration of Ex-P, Fe/Al-P, Ca-P and Org-P all decreased with increasing depth. The release of Ex-P was significantly related to TP whereas the Fe/Al-P was not significantly related to TP in the samples from areas polluted by domestic sewage. However, the release of Ex-P and Fe/Al-P were both significantly related to TP in the samples from areas polluted by phosphate mining and phosphate fertilizer application. The results of equilibrium P concentration (EPC0) analysis showed that P in the sediments of areas A, D and E were the source of P in Dianchi Lake, and the P in the sediments of areas B and C were in relative equilibrium with the overlying water.

The Influence of Large Scale Phosphate Mining on the Water Quality of the Huangbaihe River Basin in China: Dominant Pollutants and Spatial Distributions

“…However, the TP diffusion fluxes in the sediments of Xuanmiaoguan reservoir are lower than that in Lake Dianchi. Lake Dianchi is one of the most hypertrophic lakes in China (Xiangcan 2003) affected by phosphate mining activities (Yang et al 2018).…”

Spatial Distribution and Environmental Significance of Phosphorus Fractions in River Sediments and Its Influencing Factor from Hongze and Tiaoxi Watersheds, Eastern China

“…Nutrient enrichment, in particular, phosphorus (P) and nitrogen (N), has been seen as a significant threat to the protection of coastal watersheds for over 30 years [ 1 ]. Phosphorus is very much a component of growth that restricts aquatic species and is the main driving factor for eutrophication in lake ecosystems [ 2 , 3 ]. Rapid population growth, industrialization, and increased agricultural production account for the massive release of untreated sewage and waste into the environment.…”

“…Studying the spatial variations and characteristics of P in the sediments in this study area will provide valuable information on the river sediments and their influence factors and can develop a theoretical basis for the management of the environment. The goal of this research was (1) to study the composition and spatial variation of phosphorus forms in sediment, (2) to evaluate the relationship between the P forms and the physicochemical properties, and (3) to study the environmental significance of P in the area of research.…”