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- W1982102552 abstract "Abstract Phosphorus (P) speciation in size-fractionated sediments was studied, and the phosphate adsorption characteristics associated with grain size were investigated in the laboratory. Detrital P (De-P) was the most abundant form and had the highest proportion of total P (TP), followed by organic P (Or-P). Bioavailable P (BAP) was much more concentrated in fine sediments than sandy sediments, which meant that fine sediments played a dominant role in P transfer from sediments to overlying water and/or ambient pore water. Native adsorbed phosphorus (NAP) was close to the exchangeable P (Ex-P) concentrations in sediments. The adsorption capacity was 116.0, 84.8, 73.6 and 50.0 μg g −1 for fine silt, medium silt, coarse silt and sand, respectively. The zero equilibrium phosphate concentration (EPC 0 ) values obtained from the adsorption isotherms of size-fractionated sediments from the same sampling site were very close in value (55.0, 54.9, 51.7 and 49.0 μg L −1 for fine silt, medium silt, coarse silt and sand, respectively), revealing a potential method for predicting the phosphate concentrations of overlying water and/or ambient pore water, which were also considered to be the equilibrium concentrations of phosphate through long-term adsorption and desorption processes by sediments. The adsorption capacity, adsorption rate and NAP were all largely controlled by sediment grain size. Based on our data, the maximum total phosphate adsorption amount ( TQ max ) of fine sediments (" @default.
- W1982102552 created "2016-06-24" @default.
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- W1982102552 date "2014-09-01" @default.
- W1982102552 modified "2023-10-10" @default.
- W1982102552 title "Particulate phosphorus speciation and phosphate adsorption characteristics associated with sediment grain size" @default.
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- W1982102552 doi "https://doi.org/10.1016/j.ecoleng.2014.05.007" @default.
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