title: [Organic phosphorus mineralization in the sediments under the impact of pH and temperature].
abstract: In the simulation, Bowman-Cole modified organic phosphorus fractionation system was used for the analysis of pH and temperature impact on organic phosphorus mineralization. The results showed that when pH were 6.5, 7.5 and 8.5, organic phosphorus (TOP) accounted for 31.71%-41.73%, 30.85%-43.29% and 27.25%-56.31% of total phosphorus (TP) in the sediments respectively. Alkalescent environment accelerated the process of organic phosphorus mineralization which slowed down when environment was neutral. When temperatures were 15 degrees C, 25 degrees C and 35 degrees C, TOP accounted for 29.07%-46. 62%, 27.81%-46.62% and 34.56%-46.62% of TP respectively. The process of organic phosphorus mineralization increased with temperature in the first 10 days but decreased in the following 20 days. Under acidic and high temperature environment, labile organic phosphorus (LOP) has a strong influence on the water quality because of the simultaneous processes of transformations from nonlabile organic phosphorus (NOP) to moderately labile organic phosphorus (MLOP) and from MLOP to LOP.
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. linan.2005@163.com
authors: Nan
authors: N
authors: Li
authors: Bao-Qing
authors: BQ
authors: Shan
authors: Hong
authors: H
authors: Zhang
authors: Jing-Lai
authors: JL
authors: Zhang
mesh_terms: D002681:China; D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D010755:Organophosphates / Q000032:analysis / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D045483:Rivers; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D010755:Organophosphates; D014874:Water Pollutants, Chemical; D010758:Phosphorus