title: [Distribution of phosphorus fractions and bio-available phosphorus forms and their relationships in sewage sludge].
abstract: To investigate the potential bioavailability and mobility of phosphorus (P) in sewage sludge, the Standards, Measurements and Testing (SMT) programme was employed to characterize the distribution of P in sewage sludge from different treatment stage of Jiangxinzhou WWTP. The results showed that the inorganic phosphorus (IP), accounting for 61%, was the predominant fraction of total phosphorus (TP), while the organic phosphorus (OP) in TP was only 15% to 35%. And the IP mainly distributed in the non-apatite inorganic phosphorus (NAIP) fraction, accounting for more than 60%. It suggested the high potential bioavailability and mobility of P in sewage sludge. The significant positive correlations between the contents of TP and the NAIP + OP indicated that the determination of TP could be used to estimate the potential bioavailability of P in sewage sludge. The correlations between the P fractions and the physical-chemical characteristics suggested that the LOI and pH would influence significantly on the potential mobility of P in sewage sludge.
authors.affiliation: State key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China. rltang@hhu.edu.cn
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.forename: Shi-long
authors.initials: SL
authors.lastname: Feng
authors.forename: Pei-fang
authors.initials: PF
authors.lastname: Wang
authors.forename: Xiao-chen
authors.initials: XC
authors.lastname: Li
authors.forename: Li-min
authors.initials: LM
authors.lastname: Zou