Six samples of dyeing industry wastewater were
collected in plastic cans, which were already washed and
rinsed with distilled water, from a dyeing industry at
Tirpur. A typical treatment consisted of agitating 0.5 g
of adsorbent and 100 ml of wastewater in 300 ml bottles
at 120 rpm using a mechanical shaker These bottles
were withdrawn from the shaker at predetermined times.
The sample was separated by centrifugation at 1000 rpm
and the supernatant was analysed using an UV-spectrophotometer
(U-3210, Hitachi, Japan). The adsorbent
dose was varied from 0.5 to 3.5 g per 100 ml wastewaters
and the pH from 1 to 9 using HCl or NaOH. The
analysis of wastewater was carried out using standard
methods (APHA, 1980). Experiments were carried out
in duplicate and the maximum deviation was 3%.