Manganese, Iron, Coblt, Nickel and Zinc in the Eastern Harbour and EI-Mex Bay Waters, (Alexandria) By

Manganese, Iron, Coblt, Nickel and Zinc in the
Eastern Harbour and EI-Mex Bay Waters,
(Alexandria)
By
Hosny I. Emara and M. A. Shriadah
National Institute of Oceanography, Alexandria. Egypt.
Abstract
‘I1ie concentrations of matIfIanese, iron, co6ait, nid:# ana z.inc fuwe 6un aeterminea 6y atomic absorp·
tion sptctropliotometry on 97 sea-waur sample from 8 stations in tIU ‘£astern !}{ar6our anti 7 statioris from
‘El·’.Me ‘Bay (1′”,. 1) of ~ria auring tfu pe””a from?{puem6er 1987 to January 1989. ‘Trace metals amcentrations arescattera in tfu ranges (0.14·30.7), (139·148.0), (nIl·032), (0.09·1.43) anti (2.02·320.7) 111/.1″1
respectivel:y.
‘I1ie concentnltions of trace metals in 6ou.. areas an in tfu onfer z.n > ff”e> ‘.Mn > 9{j > Co at tfu surface
anti near tIU 6ottom water. ‘El.’.Mt1(‘Bay, tfu most intfustrWiutf area in Jfk~ sfwwul li.iefur uvd.s of
‘.Mn, Co, 9{j anti Zn in tfu 6ottom water man in tfu surface Water. On tfu otfur fuuu{, ‘llIitn tfu ~tion of
Zn, tfu surface water of tIU ‘Eastern !}{ar6our nJfuts liitlfur values in comparison ‘Uliu..tIU 6ottom water.
(jenerafiy, tfu ‘Eastern !}{ar6our reveals sGgfttCy IiitIfter uvels of ff”e,Co, ‘lI(j anti zn tnan ‘E{.’.Mt1(‘Bay taaur.
‘Trace metals ‘.Mn, ff”e ana Zn aistriDu.tion sUffBests a cfociJ,vise circulatum pattern of fresft water ais·
dia19in9 from ‘llmou.m arain, to ‘E{.’.Mt1(‘Bay. ‘I1ie ‘£astern :HiJr6our wfticli is poffu.tetI 6y sewage, sftowea a
tentfency to concentrate ff”e ana zn wille tfu ftar6ou.r 6y 14 antI3996 more tnan ou.tsi4e tIU Barour. wftile
‘.Mn, Co antI9{j sftowea nearly tIU same uve!
‘I1ie aistriDu.tion of Zn sftowea a rate of deaeas« of 15.9 lII/.r1 kJn·1 in tfu ‘Eastern !}{ar6our anti can 6e
u.sea as agoot! tracerfor fresn water or sewage aiscftarae.
‘I1ie appearance of foca{ ftiaft concentration for one metal 6y possibu contamination tfces not necessarily
correlate ‘Uliu..liitln vaiues for otlUr metals, ftowever, tIU refationsliips ff”e·’.Mn (r-0.80) ff”e·Zn (.,.0.80), ‘.Mn·
Zn· (.,.0.85) sftowea gooa correlation for tfu 6o’tom water as wefi as for tfu su.rface water (‘.Mn.’J{j.,r-0.80)
of ‘El·’.Me7(l(‘Bay. ‘I1ie western !Jfar6our also sftowea gooa correlations 6etwun ff”eanti Co (r-0.83), ‘.Mn ana
Co (r-0.60) for tfu surface antI6ottom water respectively.
‘I1ie present tlata snow tfI.at tIU concentrations of trrut metals compantl to otfur rteions in tfu woritl are
IiitIfter,pro6abCy the to tfu increasing pollution from waste anti aomes~ sewage.