CHAPTER 9 . Binding Ability of Inorganic Major Components of Sea Water
247
Table 9.16. Metal species percentages in SSWE as single salt, at different pH (S = 35)
Metal cation pH
MA
MA2
M(OHI
M(OHI 2
MA(OHI
Mn2+
7
43.1
6.8
0.0
8
43.1
6.8
0.1
0.1
9
42.6
6.7
0.7
0.6
Fe 2 +
7
45.7
7.9
0.1
0.1
8
45.0
7.8
0.8
0.8
9
39.0
6.8
7.3
0.1
7.4
C0 2 +
7
43.6
6.7
0.1
0.2
8
42.6
6.6
0.6
1.8
9
34.1
5.3
4.5
3.1
14.4
Ni 2 +
7
43.6
6.7
0.1
8
43.0
6.6
0.4
1.1
9
37.1
5.7
3.1
2.2
9.9
Zn 2 +
7
49.4
10.5
0.2
1.1
8
43.7
9.3
2.0
0.6
10.1
9
16.5
3.5
7.6
21.0
38.4
Cd 2 +
7
24.2
74.4
0.0
8
24.1
74.3
0.1
9
23.9
73.5
0.1
1.3
Cu 2 +
6
45.7
8.9
0.8
3.4
7
33.2
6.4
5.5
0.1
24.9
8
8.7
1.7
14.4
2.5
65.0
9
0.8
0.2
13.5
23.7
61.1
9.3.3.2
Organometallic Compounds
Among the organometallic compounds, organotin(IV) and organomercury(II) are the
most widespread in the aquatic environment as a result of their use in industry
(organotin in fungicides and acaricides in agriculture, in wood and stone preservatives, in antifouling agents in paints for ships, in stabilizers and catalysts in PVC and
foam production; organomercury in fungicides for paper and wood and in antibacterial agents in medicine, etc.) and of the bioalkylation processes of inorganic metals by
means of a variety of bacterial substrates (Craig and Miller 1997, and references therein).
Organotin(IV) compounds include a variety of organometallic moieties characterized by a central tin atom covalently bonded to various organic groups (methyl, ethyl,
propyl, butyl, octyl, phenyl, etc.) through one or more carbon atoms. Their general
formula can be written: RnSnX(4_n) (R = organic group; X = halide, nitrate, acetate, hydroxide, etc.; n = 1 to 4). Organotin cations in aqueous solution are considered as ac-