title: Laboratory studies on waste water sludge application for acid soil remediation.
abstract: In this work the effects of sludge disposal on pH values, buffer capacity and adsorption capacity of an acid soil were studied. A stabilized waste water sludge and a paper mill sludge were employed; the pH values of both sludges were higher than 8. The observed differences between soil-urban sludge and soil-paper mill sludge systems can be ascribed to the nature of the compounds present in the sludges and adsorbed on the soil. Both kinds of sludge are able to modify the natural pH of the soil, the buffer capacity and its capacity to retain metal. These modifications increase with increasing soil-sludge contact time and are higher for paper mill sludges. Temperature affects only the modifications due to urban sludge treatment.
authors.affiliation: Department of Chemistry, University of Rome La Sapienza, piazzale A. Moro 5, 00185 Rome.
authors.forename: Nicoletta
authors.initials: N
authors.lastname: Calace
authors.forename: Bianca Maria
authors.initials: BM
authors.lastname: Petronio
authors.forename: Marco
authors.initials: M
authors.lastname: Pietroletti
authors.forename: Marzia
authors.initials: M
authors.lastname: Trenta
mesh_terms: D000327:Adsorption; D002021:Buffers; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010209:Paper; D012722:Sewage; D012987:Soil; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D002021:Buffers; D012722:Sewage; D012987:Soil