caa a22 4500 605517347 CHVBK 20210128100719.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10533-015-0158-4 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0158-4 Potential for sediment phosphorus release in coal mine subsidence lakes in China: perspectives from fractionation of phosphorous, iron and aluminum [Elektronische Daten] [Qitao Yi, Pengfei Sun, Siping Niu, Youngchul Kim] Few studies have been conducted on how the quantitative relationship between phosphorus (P) and iron (Fe) and aluminium (Al) compounds in the sediments of coal mine subsidence lakes influence sediment P release. Four representative lakes, characterized by sedimentary environments of soil inundation, were selected in the Huainan and Huaibei coal mine areas of China. Their ages, pollutant loading patterns and nutrient levels were assessed to evaluate the potential for sediment P release based on the fractional composition of P, Fe and Al. Sediment P, Fe and Al were extracted sequentially using ammonium chloride (NH4Cl), bicarbonate-dithionite (BD) and sodium hydroxide (NaOH) at 25°C, followed by HCl, and then NaOH at 85°C. The resulting fractions were considered as environmental indicators for P, Fe and Al, including ion-exchangeable forms (NH4Cl-P, NH4Cl-Fe, NH4Cl-Al), associated fractions with reducible metal hydroxides (BD-P, BD-Fe, BD-Al) and amorphous hydroxides (NaOH25-P, NaOH25-Fe, NaOH25-Al), acid-soluble fractions (HCl-P, HCl-Fe, HCl-Al) and residual species (NaOH85-P, NaOH85-Fe, NaOH85-Al), respectively. The potential for sediment P release was related to the concentrations of Al and Fe compounds in the presence of soil inundation. Calcareous soils in the Huaibei area were influential in regulating sediment P release, whereas soil Fe and Al were influential in the Huainan area. The results agreed with a common empirical model that predicts low P flux if the molar ratio of [NH4Cl-Al+BD-Al+NaOH25-Al]:[NH4Cl-Fe+BD-Fe]>3 or [NaOH25-Al]:[NH4Cl-P+BD-P]>25 in sediments when anoxia develops. Increased loading of oxidizable matter (OM) or enriched P bound to Fe oxides tends to change these ratios and increase the potential for sediment P release. Springer International Publishing Switzerland, 2015 Aluminium nationallicence Iron nationallicence Phosphorus nationallicence Sediment nationallicence Soil inundation nationallicence Subsidence lakes in China nationallicence Yi Qitao School of Earth and Environment, Anhui University of Science and Technology, 232001, Huainan, China aut Sun Pengfei School of Earth and Environment, Anhui University of Science and Technology, 232001, Huainan, China aut Niu Siping Department of Environmental Engineering, Hanseo University, 356706, Seosan, Korea aut Kim Youngchul Department of Environmental Engineering, Hanseo University, 356706, Seosan, Korea aut Biogeochemistry Springer International Publishing 126/3(2015-12-01), 315-327 0168-2563 126:3<315 2015 126 10533 https://doi.org/10.1007/s10533-015-0158-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0158-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yi Qitao School of Earth and Environment, Anhui University of Science and Technology, 232001, Huainan, China aut NATIONALLICENCE 700 1- Sun Pengfei School of Earth and Environment, Anhui University of Science and Technology, 232001, Huainan, China aut NATIONALLICENCE 700 1- Niu Siping Department of Environmental Engineering, Hanseo University, 356706, Seosan, Korea aut NATIONALLICENCE 700 1- Kim Youngchul Department of Environmental Engineering, Hanseo University, 356706, Seosan, Korea aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/3(2015-12-01), 315-327 0168-2563 126:3<315 2015 126 10533