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Phosphorus Sorption of Soils to be used in Wastewater Renovation
Author(s) -
Stuanes Arne O.
Publication year - 1984
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/jeq1984.00472425001300020009x
Subject(s) - sorption , soil water , chemistry , environmental chemistry , langmuir , adsorption , wastewater , phosphorus , langmuir adsorption model , environmental engineering , environmental science , soil science , organic chemistry
The same amount of P in 0.01 M CaCl 2 was repeatedly added to 12 soils to measure the P sorption of the soils. Compared with the P sorption maximum calculated from the Langmuir equation, repeated additions showed about twice as much sorption. However, the two measurements were well correlated. At low P concentration or in soils with low sorption capacity, each addition showed about the same sorption increment after the first three to four additions. Between 6 and 35% of the amount sorbed after 10 additions of P was desorbed in 10 subsequent additions of 0.01 M CaCl 2 . The P sorption was lower at 4°C than at room temperature. The only soil parameter that significantly influenced the sorption capacity with dithionite—citrate extractable Al. The sorption capacity measured by repeated additions of a solution of the same P concentration as wastewater seems to give a better estimate of the field sorption capacity than the Langmuir sorption maximum.