Sediment quality assessment in Latvia water bodies

• Autorzy: Vircavs M.

Warianty tytułu

PL

Ocena jakości osadów w łotewskich wodach: studniach, jeziorach i zatokach morskich

• Języki publikacji: EN

Abstrakty

EN

Statistical examination of minor (1% - 10 žg/g) and micro(< 10 žg/g) elements in lake, well and harbour sediments has been clone. The tested element concentrations in lake and well sediments are less than their mean concentrations of the world's sediments in 95 % confidence level using assessment criteria C1> Sci x t1-p/2(n) + Cbi (where Sci - standard error of the mean, t1-p/2 - Student distribution quantile, p -confidence level, and n - number of observations).The negative calculated geoaccumulation indexes (Igeo) testify unpolluted character of lake and well sediments in respect to Ni, Cr, V, Co, Br, Rb, Ba, Mn, Zn, Se, Zr, Ce, La, Nd, Lu, Tb, Eu, Sb, Yb, Cs, Sm, Sc, Hf, As, Gd, Ta, Th and U. Contamination of well sediments with Cu and Sn characterises the following geo-accumulation index values - Igeo = 2.5 (Cu) and Igeo = 2.6 (Sn). The highest Igeo values were obtained for Cd (Igeo = 4.3) and Pb (Igeo = 4.6) in Liepaja military harbour and for Cd (Igeo = 4.0) in Riga harbour. The maximum pollution load index (PLI) values were observed for sediment contamination of Liepaja military harbour (PLI - 5.0) and Riga harbour (PLI - 4.5).

PL

Dokonano statystycznej oceny pomniejszych (1% - 10 žg/g) i mikro(< 10 žg/g) pierwiastków w osadach jezior, studni i portów morskich. Badane pierwiastki występują w osadach jezior i studni w stężeniach mniejszych niż ich średnie stężenie w osadach na świecie na 95 % poziomie ufności przy wykorzystaniu kryteriów szacowania Ci > Sci x tl-p/2(n) + Cbi (gdzie Sci - błąd standardowy średniej, t1-p/2 - kwantyl rozkładu Studenta, p - poziom ufności i n - liczba obserwacji). Obliczony ujemny indeks geoakumulacji (Igeo) świadczy o braku zanieczyszczeń w osadach jeziorowych i studziennych ze względu na Ni, Cr, V, Co, Br, Rb, Ba, Mn, Zn, Se, Zr, Ce, La, Nd, Lu, Tb, Eu, Sb, Yb, Cs, Sm, Sc, Hf, As, Gd, Ta, Th i U. Zanieczyszczenie osadów studziennych przez Cu i Sn jest charakteryzowane przez wartość indeksu geoakumulacji - Igeo = 2.5 (Cu) i Igeo = 2.6 (Sn). Największe wartości Igeo otrzymano dla Cd (Igeo = 4.3) i Pb (Igeo = 4.6) w porcie wojennym w Liepaja i dla Cd (Igeo = 4.0) w porcie w Rydze. Maksymalny wskaźnik ładunku zanieczyszczenia (PLI) stwierdzono dla zanieczyszczeń osadów z portu wojennego w Liepaja (PLI - 5.0) i poru w Rydze (PLI - 4.5).

Słowa kluczowe

EN

sediments; minor and microelements; geoaccumulation and pollution load indexes; lakes; wells; harbours

PL

osady; makro- i mikropierwiastki; geoakumulacja; wskaźniki poziomu zanieczyszczenia; jeziora; studnie; porty

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Ecological Chemistry and Engineering. A
• Rocznik: 2008
• Tom: Vol. 15, nr 8
• Strony: 831--839
• Opis fizyczny: Bibliogr. 19 poz., tab.

Twórcy

autor

Vircavs M.

• Faculty of Geography & Earth Sciences of University of Latvia, Alberta str. 10, Riga, LV -1010, Latvia, tel. [phone],

Bibliografia

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