28
River and Stream Sediments
1000
Mn
900
800
700
600
SOD
400
~
300
.a. c: 0
~ Q)
(J
c:
8
Fe
b
60,000
ABDEFG H I J K L M N O P Q R S T U V W X Z
Sample location
Fig. 2.3 a-c The concentration (J.lg I g) of Mn, Fe, and Al as a function of sample location in the
bottom sediments of the Rideau River, extracted by the following methods: ~ = HF-HNO r HCI0 4
(6 + 4 + 1) Teflon bomb; • = 4.0 N HN0 3 + 0.7 HCI; 0 = 0.5 N HCI; • = 1 N NHpH·HCI +
25 % CH 3 COOH; 0 = 0.5 N EDTA (from [37]).
River and Stream Sediments
1000
Mn
900
800
700
600
SOD
400
~
300
.a. c: 0
~ Q)
(J
c:
8
Fe
b
60,000
ABDEFG H I J K L M N O P Q R S T U V W X Z
Sample location
Fig. 2.3 a-c The concentration (J.lg I g) of Mn, Fe, and Al as a function of sample location in the
bottom sediments of the Rideau River, extracted by the following methods: ~ = HF-HNO r HCI0 4
(6 + 4 + 1) Teflon bomb; • = 4.0 N HN0 3 + 0.7 HCI; 0 = 0.5 N HCI; • = 1 N NHpH·HCI +
25 % CH 3 COOH; 0 = 0.5 N EDTA (from [37]).