SOME CHEMICAL FEATURES OF LAKE MARIUT

SOME CHEMICAL FEATURES OF LAKE MARIUT
MAHMOUD A. ABDELMONIEM *, fAHMY M. EL – SHARKAWY **

AND AMIN A. SAMAAN*.

*Natfonal Instftute of Oceanography and Ffsherfes, Alexandrfa.

**Hfgh Instftute of Publfc Health, Alexandrfa Unfversfty, Alexandrfa.
ABSTRACT
The polluted basfn 1n Lake Harfut (lake proper)
receives most of Hs water from the Qalaa Drafn.
Sewage effluents and fndustrfal wastes are also
dfscarded constantly fnto the basfn. Such water
affected most of fts chemfcal condftfons.
The dissolved chlorfdes fn the polluted basfn
decreased to 1063 mg C1IL, whfle the total alkalfnfty
fncreased to 370 mg Ca C03/L.
The pH values fluctuated between 7.0 and 9.6
wfth an average of 8.60. The amount of oxfdfzed
dfssolved orgar.fc matter attafned hfghest
concentratfon fnfront of the fndustrfal waste dfsposal
pfpe (average 41.8 mg 02 consumed IL).
For the fish finn whfch is fed by Harfut – El
Gedfda Pumpfng Statfon, the dfssolved chlorfdes
remafned higher than that of the lake proper,
attafnfng an average 2212 IIIQ Cl/L. The total
alkalinfty decreased to 238 mg Ca C03 IL and the
oxfdizable dissolved organfc lllatter to 15.5 1119 02
consumed IL.
The chlorosfty, total alkalinfty and oxfdfzable
organfc matter fn the Qalaa Drafn w~re also low
wfth values of 874 mg CIIL, 313 mg Ca COJ iL and
16.2 mg 02 consumed I L, respectfvely.