Accepted Papers - 3.pdf - UNESCO

granular amorphous peat, fly ash, peanut skin, and
coconut husk hull.
Zinc salts heavy doses (165 mg) in
continuation causes vomiting, renal damage, and
cramps. Discharge standard as per EPA and I:S for
zinc is 5.0 mg/l. Zinc concentration was highest in
site AB 4 (24 mg/l), least in site AB 1 (2.08 mg/l).
Concentration in site AB 2 and AB 3 was 6.52mg/l and
14.2 mg/l respectively. Zinc in decreasing order of
concentration was as follows: AB 4 >AB 3 >AB 2 >AB 1 .
Nano filtration is effective membrane technology
for the removal or separation of zinc in solution or
waste waters. Suggested natural adsorbent for zinc
adsorption are blast furnace slag, china clay waste
tea leaves and cement matrix.
Conclusion
It is thus concluded that AB 1 waste water was
alkaline , highly organically polluted indicated by
high BOD and COD values and low in metal
pollution, AB 2 site waste water was slightly acidic ,
highest in organic pollution, second lowest in metal
pollution, AB 3 waste water sample was acidic , with
highest metal pollution and low organic pollution.
AB 4 site waste water was highly acidic, lowest in
organic pollution, and second highest in metal
pollution. In all these electroplating units, certainly
there is a need to treat the waste water for certain
heavy metals and for chemical and organic pollution
before it discharges in to open drains. As these
effluents from electroplating units are highly
corrosive due to the presence of acids and toxic
metals, there discharge directly in to rivers (Yamuna
river in case of Agra) without neutralization
decreases the pH of river water and results in mass
mortality of aquatic culture. Certainly there is a need
for scientific disposal of effluents, which to certain
extent can be achieved by membrane technologies
and adsorbents referred in the present paper. Beside
* All values except pH are in mg/l
this sincere execution of policies which restrict the
effluent discharge exceeding the tolerance limits
prescribed by IS: Standards, CPCB and EPA for
discharge of industrial effluents is urgently needed
in case of present industry.
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Table 1. Indian Standards and average of readings observed for period from January-December
for pH, BOD and COD *
400