Details

Autor(en) / Beteiligte

• Liu, Tao
• Hu, Zhi-Xin
• Yang, Liu-Yan
• Xiao, Lin
• Xi, Bei-Dou
• Xu, Qi-Gong

Titel

Analysis on the forms and release potential of nutrients in sediments from lakes in the West Jiangsu Province

Ist Teil von

• Huanjing kexue, 2012-09, Vol.33 (9), p.3057

Ort / Verlag

China

Erscheinungsjahr

2012

Quelle

MEDLINE

Beschreibungen/Notizen

• To probe the effect of nitrogen and phosphorus (P) in sediment on aqueous nutrient concentrations, forms of phosphorus, sediment water interface diffusion fluxes and phosphorus release and adsorption of 10 lakes in the west Jiangsu province were studied. Sediments were sequentially extracted by the modified Ruttenberg's method, and the result showed that inorganic phosphorus in sediments of the lakes was the major fraction of total phosphorus, but the proportion of bioavailable phosphorus was relatively low. Compared with the lakes in northern Jiangsu, the Fe-P was relatively high in sediments of lakes in southern Jiangsu. The diffusion fluxes of lakes were mainly based on NH4(+) -N diffusion in the west Jiangsu, and ions of most of lakes diffused from overlying water to sediment, NO3(-) -N diffused from sediment to overlying water in lakes except for Lake Hongze, Lake Shijiu and Lake Xuanwu. The condition leaning to acidic (pH < 4) or alkaline (pH > 10) was beneficial to phosphorus release, and except for La