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Titolo:
Limed sewage sludge effects on nutrient status and metal fractions in acidic soils
Autore:
Simard, RR; Beauchemin, S; Laverdiere, MR;
Indirizzi:
Agr & Agri Food Canada, Soils & Crop Res Ctr, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada St Foy PQ Canada G1V 2J3 t Foy, PQ G1V 2J3, Canada Univ Laval, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 niv Laval, St Foy, PQ G1K 7P4, Canada
Titolo Testata:
CANADIAN JOURNAL OF SOIL SCIENCE
fascicolo: 1, volume: 79, anno: 1999,
pagine: 173 - 182
SICI:
0008-4271(199902)79:1<173:LSSEON>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-METALS; CHEMICAL FRACTIONATION; PHOSPHORUS; PLANT; TILLAGE; PH;
Keywords:
pH; extractable P and K; cement kiln dust; Al and Mn toxicity; Cu fractions; water-soluble metals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Simard, RR AgrPQ Agri Food Canada, Soils & Crop Res Ctr, 2560 Hochelaga Blvd, St Foy, Agr & Agri Food Canada 2560 Hochelaga Blvd St Foy PQ Canada G1V2J3
Citazione:
R.R. Simard et al., "Limed sewage sludge effects on nutrient status and metal fractions in acidic soils", CAN J SOIL, 79(1), 1999, pp. 173-182

Abstract

The potential impacts of limed sludge on nutrient and heavy metal bioavailability must be studied for their safe use on acidic soils. The objective of this study was to assess the impact of limed sludges on six acidic soils from eastern Canada. CaCO3 and raw sewage sludges (RSS) stabilized with either CaO (CaO + S) or cement kiln dust (CKD + S) were added to soils in amount necessary to reach pH 6.5 and the mixtures were then incubated for 64 d. CaO + S treatments were the most efficient to neutralize soil acidity. After 10 d of incubation, the Sr-citrate extractable P was significantly increased by the CaO + S treatment in low P sorption soils. The extractable K, Zn and Cu contents were also slightly increased by CaO + S compared to CaCO3whereas CKD + S resulted in an excessive soil exchangeable K content. After 64 d, labile Al content was decreased by all liming amendments. RSS and CaO + S tended to increase labile Cu and Mn contents. The RSS increased NaOH-extractable Cu but the treatments had no significant effects on the labileand stable forms of heavy metals. A combination of CaO+CKD to stabilize sewage sludge would be more suitable to provide appropriate levels of P and Kwithout resulting in large increases in extractable heavy metal contents.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:27:06