. 2001 Mar;67(3):1044–1051. doi: 10.1128/AEM.67.3.1044-1051.2001

TABLE 1.

The origin and main characteristics of the sediment samples collected from various freshwater systems in The Netherlands

Sediment no.	Origin	Typical characteristics^a	Dry wt^b (mg/ml)	Concn (μM)^c of:
Sediment no.	Origin	Typical characteristics^a	Dry wt^b (mg/ml)	H₂S	Total Mn	Total Fe	Total P	Total S
1	Zegveld I	OR, SR	60	166 (158–182)	0.52	4.8	69	1,620
2	Zegveld II	OR, SR	39	162 (139–186)	0.06	1.6	42	1,331
3	Hatertse Vennen	OR, FR	11	15 (6–26)	0.58	10.8	6	83
4	Bruuk I	OR, FR	52	0 (0–1)	0.36	37.3	24	753
5	Bruuk II	OR, SR	63	226 (134–301)	0.07	1.7	22	1,372
6	Dekkerswald	OR, SR	14	171 (135–237)	0.83	2.3	501	647
7	Breukelen	OR, SR	116	53 (15–105)	1.05	17.5	57	1,159
8	Tienhoven I	OR, SR, FR	22	3 (2–3)	0.26	17.5	18	620
9	Tienhoven II	OR	66	6 (3–8)	0.13	5.5	18	686
10	Maarssen	OR	23	18 (10–25)	0.20	2.3	26	966

OR, organic rich (range: 6.4 to 53.9% of the dry weight); SR, sulfide rich; FR, iron rich. pH range of the sediments: 6.5 to 7.8.

As estimated from sediment slurries.

Concentrations of manganese, total dissolved iron (Fe²⁺ and Fe³⁺), total dissolved P, and total dissolved S were determined from the pore water of the slurries. Those of H₂S (ranges are in parentheses) were estimated from sediment slurries (detection limit, 0.2 μM).