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Phosphate Adsorption‐Desorption Characteristics of Suspended Sediments in the Maumee River Basin of Ohio
Author(s) -
Green Dan B.,
Logan Terry J.,
Smeck Neil E.
Publication year - 1978
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1978.00472425000700020011x
Subject(s) - soil water , adsorption , sediment , desorption , calcite , environmental chemistry , fluvial , geology , hydrology (agriculture) , environmental science , chemistry , mineralogy , structural basin , soil science , geomorphology , geotechnical engineering , organic chemistry
Phosphorus (P) adsorption‐desorption characteristics of Maumee River Basin suspended sediments were compared with those of Basin soils and stream bottom sediments. Suspended sediment contained more total P than either soils or bottom sediments. The increase in total P over soils is attributed to enrichment of P in sediment by selective erosion of fine particles and adsorption of P during fluvial transport. The suspended sediment had higher adsorption maxima than Basin soils but lower than bottom sediments and had lower adsorption energies than either soils or bottom sediments. Calcite content of the suspended sediments was positively correlated with total P, EPC (equilibrium P concentration) and P desorbed and negatively correlated with adsorption energy, implying that, although calcite is a sink for P, the adsorption is weak compared with other sites for P adsorption such as hydrous oxides of Fe and Al.