3Poziom me w wodach morskich

LEVELS OF HEAVY ELEMENTS IN THE HYDROSPHERE

/

(a) Present		Flgx
	(nę	cm"^2
Depth Conc.		atm
(m) (ng kg’^1)		60

Standing ęrop (ng cm’²)

100

(~2 years)    p& f_l>ux

io    ioo <£=5

river

(~2 years)

0.6 6

100

Pb flux •=—3

river

^5|

950

(50-300 years)

TABLE 5.3 Levels of the Heavy Metals in the Oceans

Element	Concentration	Rangę ligi'^1	Speeies
As	3.7	0.5-3.7	HAsO,^1', H2AsO;
Bi	0.02	0.015-0.02	BiO*, BKOH),*
Cd	0.11	<0.01-9.4	Cd’*, CdCl2
Hg	0.03	0.01-0.22	HgCl^ HgCl,^2'
In	1x10-*		In(OH)2^+
Pb	0.03	0.03-13	PbCl*, PbCl;, PbCOy PMCCy,^2'
Sb	0.3	0.18-5.6	Sb(OH)6-
Se	0.2	0.052-0.2	SeO,^2'
Te	?		HTeO,'
Tl	0.02		tp

Location	Flux		Surface lead
	present ng cm*^2 y*^1	prehistorie ng cm*^2 y^1	ngl^1
Sth. Pacific westerlies	3	0.3	2.5
Nth. Pacific easterlies	6,7	0.3	11
Nth. Pacific westerlies	50	0.3	14
Nth. Atlantic westerlies	170	3	36

(b) Prehistorie

Flux

(ng cm"² y'¹)

Depth Conc. atm    Standing

(m) (ng kg'¹)    |<0.5 crop

__|    .(ng cm'²)

2000

420

230

50

4300

4300

Fig. 8.17 Oceanie inputs and outputs, (a) present time, (b) estimated prehistorie. "