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Titolo:
FLUORIDE SORPTION AND DESORPTION INDEXES IN QUEBEC SOILS
Autore:
SIMARD RR; LAFRANCE P;
Indirizzi:
AGR & AGRI FOOD CANADA,SOILS & CROPS RES CTR,2560 HOCHELAGA BLVD ST FOY PQ G1V 2J3 CANADA UNIV QUEBEC,INRS EAU ST FOY PQ G1V 4C7 CANADA
Titolo Testata:
Communications in soil science and plant analysis
fascicolo: 3-4, volume: 27, anno: 1996,
pagine: 853 - 866
SICI:
0010-3624(1996)27:3-4<853:FSADII>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard e P. Lafrance, "FLUORIDE SORPTION AND DESORPTION INDEXES IN QUEBEC SOILS", Communications in soil science and plant analysis, 27(3-4), 1996, pp. 853-866

Abstract

Sorption and desorption of fluoride (F) were measured on 24 samples from the A, B, and C horizons from the most representative soil series of the aluminium smeltering areas of the province of Quebec, Canada. The sorption was estimated by 48 h contact with 0.005M NaClO4 solutionsof increasing F concentration and described with the van Bemmelen-Freundlich equation, Desorption (Qdes) was measured with two 48 h contactperiods in the same electrolyte. The affinity parameter (K) was most closely correlated with ammonium oxalate extractable aluminum (Al) (AlOX, r = 0. 78) and iron (Fe) (FeOX, r = 0.59**), and organic carbon (C) (OC, r = 0.59*) contents and to the soil pH (r = 0.56**), whereas the peak sharpness of the distribution of affinity terms parameter (n)was most closely related to AlOX (r = 0.63*). The K parameter was best predicted by a combination of AlOX, FeOX, and OC. A combination of exchangeable magnesium (Mg) and potassium (K) and FeOX predicted 75% of the variation in Qdes suggesting that cation-rich Aqueptic soils retain F less strongly than Spodosols. The results of this study indicatethat Spodosols which have much larger AlOX contents than Aqueptic soils should preferably be selected as sites for Al smeltering operations.

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Documento generato il 05/12/20 alle ore 19:45:22